WO2002061784A1 - Compact high speed motor operator for a circuit breaker - Google Patents
Compact high speed motor operator for a circuit breaker Download PDFInfo
- Publication number
- WO2002061784A1 WO2002061784A1 PCT/US2001/049210 US0149210W WO02061784A1 WO 2002061784 A1 WO2002061784 A1 WO 2002061784A1 US 0149210 W US0149210 W US 0149210W WO 02061784 A1 WO02061784 A1 WO 02061784A1
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- WO
- WIPO (PCT)
- Prior art keywords
- pin
- breaker
- handle
- circuit breaker
- latch
- Prior art date
Links
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
- H01H1/20—Bridging contacts
- H01H1/2041—Rotating bridge
- H01H1/2058—Rotating bridge being assembled in a cassette, which can be placed as a complete unit into a circuit breaker
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H71/70—Power reset mechanisms actuated by electric motor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/66—Power reset mechanisms
- H01H2071/665—Power reset mechanisms the reset mechanism operating directly on the normal manual operator, e.g. electromagnet pushes manual release lever back into "ON" position
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/1009—Interconnected mechanisms
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/50—Manual reset mechanisms which may be also used for manual release
- H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
- H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
- H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
Definitions
- the present apparatus relates to a motor operator, and, more particularly, to a motor operator for circuit breakers.
- a motor operator is typically secured to the top of a circuit breaker housing.
- a linkage system within the motor operator mechanically interacts with a circuit breaker operating handle, which extends from the circuit breaker housing.
- the linkage system is operatively connected to a motor within the motor operator and a powerful closing spring.
- the motor drives the linkage system, which, in turn, moves the operating handle to reset/open and charge the closing spring the circuit breaker.
- the operating handle is moved from off to on by releasing the stored energy in the closing spring which quickly drives the linkage system and handle to turn on the circuit breaker between "on", “off, and “reset” positions, depending on the rotational direction of the motor.
- Electric circuit breakers of relatively high current carrying capacity utilize large movable contact arm assemblies to carry the current. Moreover, substantial contact pressure is exerted on the movable contact arms by powerful springs in order to achieve intimate electrical contact between the stationary and movable contacts of the rotary circuit breakers. These powerful springs are also used for abrupt separation of the contacts.
- motor operators typically employ a large closing spring that, when released, can move the operating handle of the circuit breaker from off to on within the required time. Such motor operators must be large in size to contain the large spring and operating mechanism required to move the breaker handle from the off to the on position.
- a motor operator must also be designed to prevent damage to the circuit breaker, and to itself, when moving the circuit breaker handle between the reset, off and on positions.
- the motor operator and the circuit breaker must be designed such that closing the circuit does not damage the circuit breaker operating mechanism. This is typically achieved by strengthening the motor operator and the circuit breaker so that they may withstand the stress caused by overtravel, or by utilization of a limit switches, takeup springs and solenoids to disengage the motor after the handle has reached a desired point. While effective, the use of limit switches, takeup springs and solenoids to disengage the motor requires the use of many components and, therefore, increases the cost of the motor operator and its potential for failure.
- a motor operator mechanism for moving a breaker handle of a circuit breaker between off and on positions.
- the motor operator mechanism comprising: a first pin biased to engage the breaker handle in a direction to close the circuit breaker; a pin latch configured to releasably engage the first pin when the breaker handle is in a position intermediate to the off and on positions, wherein releasing the pin latch allows the first pin to move the breaker handle to the on position.
- FIGURE 1 is an isometric view of a molded case circuit breaker employing an operating mechanism interfaced with a motor operator;
- FIGURE 2 is a partially exploded view of the circuit breaker and motor operator of Figure 1 ;
- FIGURE 3 is a partial sectional view of a rotary contact structure and operating mechanism in the "off position
- FIGURE 4 is a partial sectional view of the rotary contact structure and operating mechanism of FIGURE 3 in the "on" position;
- FIGURE 5 is a partial sectional view of the rotary contact structure and operating mechanism of FIGURES 3 and 4 in the "tripped" position;
- FIGURE 6 is a partial sectional view of a rotary structure and operating mechanism in "off,” “tripped,” and “on” positions;
- FIGURE 7 is a schematic diagram of a motor operator and a circuit breaker of the present apparatus in the off position;
- FIGURE 8 is a schematic diagram of a motor operator and a circuit breaker of the present apparatus in the ready to close position
- FIGURE 9 is a schematic diagram of a motor operator and a circuit breaker of the present apparatus in the reset and closed positions.
- Circuit breaker 20 generally includes a molded case having a top cover 22 attached to a mid cover 24 coupled to a base 26.
- An opening 28, formed generally centrally within top cover 22, is positioned to mate with a corresponding mid cover opening 30, which is accordingly aligned with opening 28 when mid cover 24 and top cover 22 are coupled to one another.
- Motor operator 430 generally includes a motor operator mechanism for moving a breaker handle 44 of circuit breaker 20 having a first pin 422 biased against the breaker handle 44 in a closing direction.
- first pin 422 is biased with a spring 421 in tension connected to a drive pin 418.
- the drive pin 418 is driven by means of a drive system 410.
- the motor operator mechanism further includes a pin latch 425 that pivots about a first end 427 and configured on a second end 429 to releasably engage the first pin when the breaker handle 44 is in a position intermediate to an open and closed position, wherein releasing the first pin 422 allows the biased first pin to move the breaker handle 44 to the closed position.
- the pin latch 425 is linked to a close mechanism 423 via link 424. The close mechanism 423 causes the pin latch 425 to pivot and thereby release the first pin 422.
- a 3-pole system i.e., corresponding with three phases of current
- three rotary cassettes 32, 34 and 36 are disposed within base 26.
- Cassettes 32, 34 and 36 are commonly operated by an interface between an operating mechanism 38 via a cross pin 40.
- Operating mechanism 38 is positioned and configured atop cassette 34, which is generally disposed intermediate to cassettes 32 and 36.
- Operating mechanism 38 operates substantially as described herein and as described in U.S. Patent Application Serial Numbers 09/196,706 (GE Docket Number 41PR-7540) entitled "Circuit Breaker Mechanism for a Rotary Contact Assembly".
- a breaker handle 44 extends through openings 28 and 30 and allows for external operation of cassettes 32, 34 and 36.
- Examples of rotary contact structures that may be operated by operating mechanism 38 are described in more detail in U.S. Patent Application Serial Numbers 09/087,038 (GE Docket Number 41PR-7500) and 09/384,908 (GE Docket Number 41PR7613/7619), both entitled “Rotary Contact Assembly For High-Ampere Rated Circuit Breakers", and U.S. Patent Application Serial Number 09/384,495, entitled “Supplemental Trip Unit For Rotary Circuit Interrupters".
- Cassettes 32, 34, 36 are typically formed of high strength plastic material and each include opposing sidewalls 46, 48.
- Rotary contact assembly 56 includes a load side contact strap 58 and line side contact strap 62 for connection with a power source and a protected circuit (not shown), respectively.
- Load side contact strap 58 includes a stationary contact 64 and line side contact strap 62 includes a stationary contact 66.
- Rotary contact assembly 56 further includes a movable contact arm 68 having a set of contacts 72 and 74 that mate with stationary contacts 64 and 66, respectively, in an "on" position.
- a movable contact arm 68 having a set of contacts 72 and 74 that mate with stationary contacts 64 and 66, respectively, in an "on” position.
- contacts 72 and 74 are separated from stationary contacts 64 and 66, thereby preventing current from flowing through contact arm 68.
- Contact arm 68 is mounted on a rotor structure 76 that houses one or more sets of contact springs (not shown). Contact arm 68 and rotor structure 76 pivot about a common center 78. Cross pin 40 interfaces through an opening 82 within rotor structure 76 generally to cause contact arm 68 to be moved from the "on", “off and “tripped” position.
- the components of operating mechanism 38 are described in more detail in U.S. Patent Application Serial Number 60/190,295 (GE Docket Number 41PR-7754) entitled "High Energy Closing Mechanism for Circuit Breakers.”
- FIGURE 4 a manual closing force or mechanical force by way of a biased first pin 422 was applied to breaker handle 44 to move it from the "off position (i.e., FIGURE 3) to the "on” position (i.e., to the right as oriented in FIGURE 4). While the closing force is applied, upper link 174 rotates within arcuate slot 168 of cradle 106 about pin 188, and lower link 194 is driven to the right under bias of the mechanism spring 96 in tension. In a preferred embodiment, there should be a suitable space between the surfaces of upper link 174 and cradles 106 to prevent friction therebetween, which would increase the force required to set the operating mechanism 38 from "off to "on”.
- secondary latch trip tab 146 has been displaced (e.g., by an actuator, not shown), and the interface between primary latch 126 and secondary latch 138 is released. Extensions 166 of primary latch 126 are disengaged from cradle latch surfaces 164, and cradle 106 is rotated clockwise about pin 108 (i.e., motion guided by rivet 1 16 in arcuate slot 118). The movement of cradle 106 transmits a force via pin 188 to upper link 174 (having cam surface 171). After a short predetermined rotation, cam surface 171 of upper link 174 contacts roller 173.
- FIGURE 6 shows the movable rotary contact assembly 56 in the "off (open) position.
- the “z” distance represents the length of the mechanism (operating) spring 96.
- the closing spring force is always directed through the anchor point of spring 96, spring anchor 98 and pin 202, as depicted by line “y".
- a first pin 422 engages breaker handle 44 at an interface 417 formed between the motor operator 430 and the breaker mechanism 38, where the first pin 422 moves breaker handle 44 in a clockwise direction about bearing portion 94 to rotate crank 208 to the closed position in conjunction with mechanism spring 96.
- First pin 422 is biased in the closing direction.
- a spring 421 is utilized to bias first pin 422 in an exemplary embodiment.
- An alternative embodiment includes the interface 417 having a slot 419 wherein the first pin 422 and drive pin 418 are guided in said slot 419 as shown in FIGURES 7, 8, and 9.
- Drive pin 418 (driven by a drive system 410) is connected to a first pin 422 with a spring 421 biasing the first pin 422 against the breaker handle 44 in an interface between the motor operator 430 and the circuit breaker mechanism causing breaker handle 44 to move towards the closed position.
- the pin latch 425 pivots about a pin 426 proximate a first end 427 of the pin latch 425.
- a spring biases the pin latch 425 to rotate in a counterclockwise direction about the pin 426.
- the other end of the pin latch is formed to contact and restrain the first pin 422.
- the pin latch 425 is connected to a close mechanism 423 with a connecting link 424.
- FIGURE 7 shows a motor operator and circuit breaker mechanism in the "reset" and “off positions.
- the breaker handle 44 is attached to a handle yoke 88.
- the handle yoke 88 is attached to a bearing portion 94, which in turn is fixed to a breaker frame (not shown).
- An axis through a spring anchor 98 and bearing portion 94 coinciding with handle yoke 88 position is oriented counterclockwise in relation to a vertical axis passing through bearing portion 94.
- a breaker mechanism spring 96 is attached to the handle yoke 88 and extends in tension to a pin 202.
- Pin 202 pivotally connects an upper link 174 and lower link 194.
- the upper link 174 pivots on a pin 188 that is pivotally attached to a cradle 106.
- the cradle 106 pivots on one end on a pin 108 that is attached to the breaker frame (not shown).
- the lower link 194 is secured to a pivotal rivet 210.
- the pivotal rivet 210 is secured to a rotary contact assembly 56 having arms 68 that is mounted to the breaker frame (not shown) and allowed to rotate around common center 78 in the breaker frame. In the "off and "reset" position, the rotary contact assembly 56 is pivoted counterclockwise such that arms of rotary contact assembly 56 are not in contact with a line strap 62 and a load strap 58, thus creating an open circuit.
- FIGURE 8 shows a motor operator and circuit breaker preparing to close.
- a drive system 410 operates a drive pin 418 to pull away from a first pin 422 connected to the drive pin 418 with a spring 421 , the drive pin 418 and second pin 422 are disposed on either side of a breaker handle within an interface between the motor operator and circuit breaker, wherein the drive pin 418 and first pin 422 motion is guided within a slot 419.
- the clockwise rotation of the handle yoke 88 causes the mechanism spring 96 to extend, thus charging the mechanism spring 96 with closing energy.
- the pin latch 425 contacts and contains the first pin 422 at a predetermined point before the circuit breaker closes.
- the predetermined point occurs just before the orientation of a lengthwise axis of the mechanism spring 96 (running through a spring anchor 98 for mechanism spring 96 on the handle yoke 88 and pin 202) coincides with a lengthwise axis of the upper link 174 (from pin 202 to pin 188).
- the drive pin 418 continues to move as the first pin 422 is blocked by the pin latch 425, causing the at least one spring 421 connecting the drive pin 418 and first pin 422 to further lengthen, thereby storing a closing energy to move the breaker handle 44 to the on position once the first pin 422 is allowed to move.
- the force required to move the breaker handle from this predetermined point is less than the force required to move the breaker handle 44 at a point closer to an "off position by minimizing the moment arm keeping the circuit breaker open.
- the reduced force required to move the breaker handle takes advantage of the reduced moment arm "w" discussed below in this predetermined position and an "over-center” point that refers to a mechanism spring 96 axis between spring anchor 98 and pin 202 coinciding with an axis formed between pin 188 and pin 202.
- the present apparatus allows the breaker handle 44 to move in a closing direction under bias of a first pin 422 until a predetermined point illustrated in an initial open position 266 and further depicted when line “y" is just to the left of the pin 188.
- the "z" distance increases, creating greater closing force output within the mechanism spring 96.
- the closing spring force is always directed through the anchor points of springs 96, spring anchor 98 and pin 202, as depicted by line "y".
- the present apparatus allows the contacts 64, 72, 74, and 66 to close with a first pin 422 exerting a force on the breaker handle 44 in a closing direction, but is blocked with a pin latch 425 from exerting this force at a predetermined distance intermediate to the off and on positions until released.
- the present apparatus utilizes a motor operator unit to control the "on", “off, and “reset” functions of a circuit breaker and reduces the force on the breaker handle to control these functions, and thereby reduces the applied force to the contacts when closing the circuit.
- the reduced force required to move the breaker handle 44 from the predetermined point occurs when the handle yoke 88 connected to the breaker handle 44 and the mechanism spring 96 line up just before the over-center point for the mechanism spring 96 and therefore a minimal amount of force is needed to move the handle yoke 88 past the over-center point, wherein the mechanism spring 96 will cause the rotary contact assembly 56 to rotate clockwise about common center 78, thus closing the circuit breaker.
- a close mechanism 423 attachable to the motor operator pivots pin latch 425 in a direction opposite of its bias via link 424, thus releasing first pin 422.
- First pin 422 by action of the a spring 421 moves the breaker handle 44 and attached handle yoke 88 to a full clockwise position about bearing portion 94 to the position shown in FIGURE 9.
- the breaker mechanism spring 96 will cause the upper link 174 to pivot counter clockwise about pin 188.
- the lower link 194 is driven against the pivotal rivet 210, thus rotating the rotary contact assembly 56 clockwise into contact with the line strap 62 and the load strap 58 establishing a closed electrical circuit.
- the apparatus as described provides for reduced closing times due to efficient utilization of the circuit breaker mechanism spring and the reduced operating motion to move the breaker handle to the "on" position.
- the apparatus also allows a reduction in the size of a motor operator, as the required stored energy is significantly reduced due to a shorter closing stroke and thereby the motor operator may be reduced in size because less energy is required to close the circuit eliminating the need for larger springs to store the customary closing energy.
- the reduced closing energy required will also require a smaller sized electrical charging system that will place less demands on the motor operator control system yielding greater operating efficiency.
- the use of less closing energy reduces the mechanical stress on both the motor operator and the circuit breaker.
Abstract
A motor operator mechanism is disclosed for moving a breaker handle (44) of a circuit breaker (20) between off and on positions. The motor operator mechanism comprises of a first pin (422) biased to engage the breaker handle (44) in a direction to close the circuit breaker (20), a pin latch (425) configured to releasably engage the first pin (422) when the breaker handle (44) is in a position intermediate to the off and on positions, wherein releasing the pin latch (425) allows the first pin (422) to move the breaker handle (44) to the on position.
Description
COMPACT HIGH SPEED MOTOR OPERATOR FOR A CIRCUIT BREAKER
BACKGROUND OF THE INVENTION
The present apparatus relates to a motor operator, and, more particularly, to a motor operator for circuit breakers.
The use of motor operators (motor charging mechanisms) to allow the motor-assisted operation of electrical circuit breakers is well known. A motor operator is typically secured to the top of a circuit breaker housing. A linkage system within the motor operator mechanically interacts with a circuit breaker operating handle, which extends from the circuit breaker housing. The linkage system is operatively connected to a motor within the motor operator and a powerful closing spring. The motor drives the linkage system, which, in turn, moves the operating handle to reset/open and charge the closing spring the circuit breaker. The operating handle is moved from off to on by releasing the stored energy in the closing spring which quickly drives the linkage system and handle to turn on the circuit breaker between "on", "off, and "reset" positions, depending on the rotational direction of the motor.
When the handle is moved to the "on" position, electrical contacts within the circuit breaker are brought into contact with each other, allowing electrical current to flow through the circuit breaker. When the handle is moved to the "off position, the electrical contacts are separated, stopping the flow of electrical current through the circuit breaker. When the handle is moved to the "reset" position, an operating mechanism within the circuit breaker is reset, as is necessary after the operating mechanism has tripped in response to an overcurrent condition in the electrical circuit being protected by the circuit breaker.
Electric circuit breakers of relatively high current carrying capacity utilize large movable contact arm assemblies to carry the current. Moreover, substantial contact pressure is exerted on the movable contact arms by powerful springs in order to achieve intimate electrical contact between the stationary and movable contacts of the rotary circuit breakers. These powerful springs are also used for abrupt separation of the contacts.
When using a motor operator to open or close a circuit breaker, it is desirable to close the circuit breaker contacts as quickly as possible for certain applications. To accomplish this, motor operators typically employ a large closing spring that, when released, can move the operating handle of the circuit breaker from off to on within the required time. Such motor operators must be large in size to contain the large spring and operating mechanism required to move the breaker handle from the off to the on position.
A motor operator must also be designed to prevent damage to the circuit breaker, and to itself, when moving the circuit breaker handle between the reset, off and on positions. In particular, the motor operator and the circuit breaker must be designed such that closing the circuit does not damage the circuit breaker operating mechanism. This is typically achieved by strengthening the motor operator and the circuit breaker so that they may withstand the stress caused by overtravel, or by utilization of a limit switches, takeup springs and solenoids to disengage the motor after the handle has reached a desired point. While effective, the use of limit switches, takeup springs and solenoids to disengage the motor requires the use of many components and, therefore, increases the cost of the motor operator and its potential for failure.
BRIEF SUMMARY OF THE INVENTION
These and other drawbacks are overcome by a motor operator mechanism for moving a breaker handle of a circuit breaker between off and on positions. The motor operator mechanism comprising: a first pin biased to engage the breaker handle in a direction to close the circuit breaker; a pin latch configured to releasably engage the first pin when the breaker handle is in a position intermediate to the off and on positions, wherein releasing the pin latch allows the first pin to move the breaker handle to the on position.
BRIEF DESCRIPTION OF THE DRAWINGS
Referring to the exemplary drawings wherein like elements are numbered alike in the several FIGURES:
FIGURE 1 is an isometric view of a molded case circuit breaker employing an operating mechanism interfaced with a motor operator;
FIGURE 2 is a partially exploded view of the circuit breaker and motor operator of Figure 1 ;
FIGURE 3 is a partial sectional view of a rotary contact structure and operating mechanism in the "off position;
FIGURE 4 is a partial sectional view of the rotary contact structure and operating mechanism of FIGURE 3 in the "on" position;
FIGURE 5 is a partial sectional view of the rotary contact structure and operating mechanism of FIGURES 3 and 4 in the "tripped" position;
FIGURE 6 is a partial sectional view of a rotary structure and operating mechanism in "off," "tripped," and "on" positions;
FIGURE 7 is a schematic diagram of a motor operator and a circuit breaker of the present apparatus in the off position;
FIGURE 8 is a schematic diagram of a motor operator and a circuit breaker of the present apparatus in the ready to close position; and
FIGURE 9 is a schematic diagram of a motor operator and a circuit breaker of the present apparatus in the reset and closed positions.
DETAILED DESCRIPTION OF THE INVENTION
Referring to FIGURES 1 and 2, a motor operated circuit breaker 450 comprising a circuit breaker 20 interfaced with a motor operator 430. Circuit breaker 20 generally includes a molded case having a top cover 22 attached to a mid cover 24 coupled to a base 26. An opening 28, formed generally centrally within top cover 22, is positioned to mate with a corresponding mid cover opening 30, which is accordingly aligned with opening 28 when mid cover 24 and top cover 22 are coupled to one another. Motor operator 430 generally includes a motor operator mechanism for moving a
breaker handle 44 of circuit breaker 20 having a first pin 422 biased against the breaker handle 44 in a closing direction. In a preferred embodiment, first pin 422 is biased with a spring 421 in tension connected to a drive pin 418. The drive pin 418 is driven by means of a drive system 410. The motor operator mechanism further includes a pin latch 425 that pivots about a first end 427 and configured on a second end 429 to releasably engage the first pin when the breaker handle 44 is in a position intermediate to an open and closed position, wherein releasing the first pin 422 allows the biased first pin to move the breaker handle 44 to the closed position. The pin latch 425 is linked to a close mechanism 423 via link 424. The close mechanism 423 causes the pin latch 425 to pivot and thereby release the first pin 422.
In a 3-pole system (i.e., corresponding with three phases of current), three rotary cassettes 32, 34 and 36 are disposed within base 26. Cassettes 32, 34 and 36 are commonly operated by an interface between an operating mechanism 38 via a cross pin 40. Operating mechanism 38 is positioned and configured atop cassette 34, which is generally disposed intermediate to cassettes 32 and 36. Operating mechanism 38 operates substantially as described herein and as described in U.S. Patent Application Serial Numbers 09/196,706 (GE Docket Number 41PR-7540) entitled "Circuit Breaker Mechanism for a Rotary Contact Assembly".
A breaker handle 44 extends through openings 28 and 30 and allows for external operation of cassettes 32, 34 and 36. Examples of rotary contact structures that may be operated by operating mechanism 38 are described in more detail in U.S. Patent Application Serial Numbers 09/087,038 (GE Docket Number 41PR-7500) and 09/384,908 (GE Docket Number 41PR7613/7619), both entitled "Rotary Contact Assembly For High-Ampere Rated Circuit Breakers", and U.S. Patent Application Serial Number 09/384,495, entitled "Supplemental Trip Unit For Rotary Circuit Interrupters". Cassettes 32, 34, 36 are typically formed of high strength plastic material and each include opposing sidewalls 46, 48. Sidewalls 46, 48 have an arcuate slot 52 positioned and configured to receive and allow the motion of cross pin 40 by action of operating mechanism 38.
Referring now to FIGURES 3, 4, and 5, an exemplary rotary contact assembly 56 that is disposed within each cassette 32, 34, 36 is shown in the "off, "on" and "tripped" conditions, respectively. Also depicted are partial side views of operating mechanism 38, the components of which are described in greater detail further herein. Rotary contact assembly 56 includes a load side contact strap 58 and line side contact strap 62 for connection with a power source and a protected circuit (not shown), respectively. Load side contact strap 58 includes a stationary contact 64 and line side contact strap 62 includes a stationary contact 66. Rotary contact assembly 56 further includes a movable contact arm 68 having a set of contacts 72 and 74 that mate with stationary contacts 64 and 66, respectively, in an "on" position. In the "off position (FIGURE 3) of operating mechanism 38, wherein breaker handle 44 is oriented to the left (e.g., via a manual or mechanical force), contacts 72 and 74 are separated from stationary contacts 64 and 66, thereby preventing current from flowing through contact arm 68.
In the "on" position (FIGURE 4) of operating mechanism 38, wherein breaker handle 44 is oriented to the right as depicted in FIGURE 3 (e.g., via a manual or mechanical force), contacts 72 and 74 are mated with stationary contacts 64 and 66, thereby allowing current to flow through contact arm 68. In the "tripped" position (FIGURE 5) of operating mechanism 38, breaker handle 44 is oriented between the "on" position and the "off position (typically by the release of mechanism spring 96 within operating mechanism 38, described in greater detail herein). In this "tripped" position, contacts 72 and 74 are separated from stationary contacts 64 and 66 by the action of operating mechanism 38, thereby preventing current from flowing through contact arm 68. After operating mechanism 38 is in the "tripped" position, it must ultimately be returned to the "on" position for operation. This is effectuated by applying a reset force to move breaker handle 44 to a "reset" condition, which is beyond the "off position (i.e., further to the left of the "off position in FIGURE 3), and then back to the "on" position. This reset force must be high enough to overcome the mechanism spring 96, described herein.
Contact arm 68 is mounted on a rotor structure 76 that houses one or more sets of contact springs (not shown). Contact arm 68 and rotor structure 76 pivot about a
common center 78. Cross pin 40 interfaces through an opening 82 within rotor structure 76 generally to cause contact arm 68 to be moved from the "on", "off and "tripped" position. The components of operating mechanism 38 are described in more detail in U.S. Patent Application Serial Number 60/190,295 (GE Docket Number 41PR-7754) entitled "High Energy Closing Mechanism for Circuit Breakers."
Referring back to FIGURES 3-5, the movement of operating mechanism 38 relative to rotary contact assembly 56 will be detailed.
Referring to FIGURE 3, in the "off position breaker handle 44 is rotated to the left and mechanism spring 96, lower link 194 and crank 208 are positioned to maintain contact arm 68 so that movable contacts 72, 74 remain separated from stationary contacts 64, 66. Operating mechanism 38 becomes set in the "off position after a reset force properly aligns primary latch 126, secondary latch 138 and cradle 106 (e.g., after operating mechanism 38 has been tripped) and is released. Thus, when the reset force is released, extensions 166 of primary latch 126 rest upon cradle latch surface 164. The line of forces generated by mechanism spring 96 (i.e., between spring anchor 98 and pin 202) is to the left of bearing portion 94 (as oriented in FIGURES 3-5). Cam surface 171 of upper link 174 is out of contact with roller 173.
Referring now to FIGURE 4, a manual closing force or mechanical force by way of a biased first pin 422 was applied to breaker handle 44 to move it from the "off position (i.e., FIGURE 3) to the "on" position (i.e., to the right as oriented in FIGURE 4). While the closing force is applied, upper link 174 rotates within arcuate slot 168 of cradle 106 about pin 188, and lower link 194 is driven to the right under bias of the mechanism spring 96 in tension. In a preferred embodiment, there should be a suitable space between the surfaces of upper link 174 and cradles 106 to prevent friction therebetween, which would increase the force required to set the operating mechanism 38 from "off to "on".
Referring now to FIGURE 5, in the "tripped" condition, secondary latch trip tab 146 has been displaced (e.g., by an actuator, not shown), and the interface between primary latch 126 and secondary latch 138 is released. Extensions 166 of primary
latch 126 are disengaged from cradle latch surfaces 164, and cradle 106 is rotated clockwise about pin 108 (i.e., motion guided by rivet 1 16 in arcuate slot 118). The movement of cradle 106 transmits a force via pin 188 to upper link 174 (having cam surface 171). After a short predetermined rotation, cam surface 171 of upper link 174 contacts roller 173. The force resulting from the contact of cam surface 171 on roller 173 causes upper link 174 and lower link 194 to buckle and allows mechanism spring 96 to pull lower link 194 via pin 202. In turn, lower link 194 transmits a force to crank 208 (i.e., via rivet 210), causing crank 208 to rotate counter clockwise about center 78 and drive cross pin 40 to the lower portion of an arcuate slot (shown in phantom lines in FIGURE 4). The forces transmitted through cross pin 40 to rotary contact assembly 56 via opening 82 cause movable contacts 72, 74 to separate from stationary contacts 64, 66.
FIGURE 6 shows the movable rotary contact assembly 56 in the "off (open) position. The "z" distance represents the length of the mechanism (operating) spring 96. As the breaker handle 44 is rotated from position 263 to the position 265, the "z" distance increases, creating greater closing force output within the mechanism spring 96. The closing spring force is always directed through the anchor point of spring 96, spring anchor 98 and pin 202, as depicted by line "y". When the line "y" passes to the right of upper link pivot pin 188, a moment arm of length "x" is created perpendicular to line "y" and through the center of pin 188. When line "y" creates a sufficient moment arm "x" about pin 188, as at the initial close position 264, the upper link 174 will rotate in a counterclockwise direction about pin 188 and close the contact arm 68 as described hereinbefore with reference to FIGURE 4. Line "y" placed in the initial closed position 266 will allow the operating mechanism 38 to create a particular amount of closing output.
If line "y" is allowed to go to the "full closed position", the closing output of the mechanism 38 is greatly increased due to the fact that moment arm "x" is a greater length and the length of spring 96, depicted as "z", is also greater. When closing the contacts 64, 72, 74 and 66, the handle 44 is normally rotated to its "full closed position". If the handle 44 is moved to less than the full closed position, then the "x"
moment arm is relatively short. Thus, the rate at which the handle 44 is rotated to the full closed position can affect the closing output of the operating mechanism 38.
Referring to FIGURE 7, a first pin 422 engages breaker handle 44 at an interface 417 formed between the motor operator 430 and the breaker mechanism 38, where the first pin 422 moves breaker handle 44 in a clockwise direction about bearing portion 94 to rotate crank 208 to the closed position in conjunction with mechanism spring 96. First pin 422 is biased in the closing direction. A spring 421 is utilized to bias first pin 422 in an exemplary embodiment. An alternative embodiment includes the interface 417 having a slot 419 wherein the first pin 422 and drive pin 418 are guided in said slot 419 as shown in FIGURES 7, 8, and 9.
Drive pin 418 (driven by a drive system 410) is connected to a first pin 422 with a spring 421 biasing the first pin 422 against the breaker handle 44 in an interface between the motor operator 430 and the circuit breaker mechanism causing breaker handle 44 to move towards the closed position. The pin latch 425 pivots about a pin 426 proximate a first end 427 of the pin latch 425. A spring (not shown) biases the pin latch 425 to rotate in a counterclockwise direction about the pin 426. The other end of the pin latch is formed to contact and restrain the first pin 422. The pin latch 425 is connected to a close mechanism 423 with a connecting link 424.
The operation of the motor operator 430 will now be described with reference to FIGURES 7, 8, and 9. FIGURE 7 shows a motor operator and circuit breaker mechanism in the "reset" and "off positions. The breaker handle 44 is attached to a handle yoke 88. The handle yoke 88 is attached to a bearing portion 94, which in turn is fixed to a breaker frame (not shown). An axis through a spring anchor 98 and bearing portion 94 coinciding with handle yoke 88 position is oriented counterclockwise in relation to a vertical axis passing through bearing portion 94. A breaker mechanism spring 96 is attached to the handle yoke 88 and extends in tension to a pin 202. Pin 202 pivotally connects an upper link 174 and lower link 194. The upper link 174 pivots on a pin 188 that is pivotally attached to a cradle 106. The cradle 106 pivots on one end on a pin 108 that is attached to the breaker frame (not shown). The lower link 194 is secured to a pivotal rivet 210. The pivotal rivet 210 is
secured to a rotary contact assembly 56 having arms 68 that is mounted to the breaker frame (not shown) and allowed to rotate around common center 78 in the breaker frame. In the "off and "reset" position, the rotary contact assembly 56 is pivoted counterclockwise such that arms of rotary contact assembly 56 are not in contact with a line strap 62 and a load strap 58, thus creating an open circuit.
FIGURE 8 shows a motor operator and circuit breaker preparing to close. A drive system 410 operates a drive pin 418 to pull away from a first pin 422 connected to the drive pin 418 with a spring 421 , the drive pin 418 and second pin 422 are disposed on either side of a breaker handle within an interface between the motor operator and circuit breaker, wherein the drive pin 418 and first pin 422 motion is guided within a slot 419. As the drive pin 418 moves further away from the first pin 422, the spring 421 connecting both pins tensions causing the first pin 422 to exert increasing force on the breaker handle 44 and rotate the breaker handle 44 and connected handle yoke 88 clockwise about the bearing portion 94. The clockwise rotation of the handle yoke 88 causes the mechanism spring 96 to extend, thus charging the mechanism spring 96 with closing energy. At the position shown in FIGURE 8, the pin latch 425 contacts and contains the first pin 422 at a predetermined point before the circuit breaker closes. The predetermined point occurs just before the orientation of a lengthwise axis of the mechanism spring 96 (running through a spring anchor 98 for mechanism spring 96 on the handle yoke 88 and pin 202) coincides with a lengthwise axis of the upper link 174 (from pin 202 to pin 188).
The drive pin 418 continues to move as the first pin 422 is blocked by the pin latch 425, causing the at least one spring 421 connecting the drive pin 418 and first pin 422 to further lengthen, thereby storing a closing energy to move the breaker handle 44 to the on position once the first pin 422 is allowed to move. The force required to move the breaker handle from this predetermined point is less than the force required to move the breaker handle 44 at a point closer to an "off position by minimizing the moment arm keeping the circuit breaker open. The reduced force required to move the breaker handle takes advantage of the reduced moment arm "w" discussed below in this predetermined position and an "over-center" point that refers to a mechanism
spring 96 axis between spring anchor 98 and pin 202 coinciding with an axis formed between pin 188 and pin 202.
Turning to FIGURE 6, the present apparatus allows the breaker handle 44 to move in a closing direction under bias of a first pin 422 until a predetermined point illustrated in an initial open position 266 and further depicted when line "y" is just to the left of the pin 188. As mentioned above, when the breaker handle 44 is rotated from open position 263 to the initial open position 266, the "z" distance increases, creating greater closing force output within the mechanism spring 96. The closing spring force is always directed through the anchor points of springs 96, spring anchor 98 and pin 202, as depicted by line "y". However, in position 266, the line "y" does not pass the right of upper link pivot pin 188, and the line of forces generated by mechanism spring 96 (i.e., between spring anchor 98 and pin 202) is to the left of bearing portion 94 (as oriented in FIGURES 3-5) and to the left of pin 188 (as oriented in FIGURE 9), causing the upper link 174 to rotate in a clockwise direction about pin 188 and open the contact arm 68 as described hereinbefore with reference to FIGURE 3. When the line "y" is disposed marginally left of upper link pivot pin 188 as in initial open position 266, a moment arm of length "w" is created perpendicular to line "y" and through the center of pin 188. The relatively small moment arm "w" causing the contacts to remain open is overcome when the biased first pin is allowed to exert enough force to overcome the moment arm in initial open position 266 and move the breaker handle 44 to position 264, which in turn allows the contacts to close as discussed above.
The present apparatus allows the contacts 64, 72, 74, and 66 to close with a first pin 422 exerting a force on the breaker handle 44 in a closing direction, but is blocked with a pin latch 425 from exerting this force at a predetermined distance intermediate to the off and on positions until released. When the first pin is released, the distance to close is shorter and there is an accompanying increase in closing speed due to the shorter close stroke. The present apparatus utilizes a motor operator unit to control the "on", "off, and "reset" functions of a circuit breaker and reduces the force on the breaker handle to control these functions, and thereby reduces the applied force to the contacts when closing the circuit.
The reduced force required to move the breaker handle 44 from the predetermined point occurs when the handle yoke 88 connected to the breaker handle 44 and the mechanism spring 96 line up just before the over-center point for the mechanism spring 96 and therefore a minimal amount of force is needed to move the handle yoke 88 past the over-center point, wherein the mechanism spring 96 will cause the rotary contact assembly 56 to rotate clockwise about common center 78, thus closing the circuit breaker.
To close the breaker contacts 72 and 74, a close mechanism 423 attachable to the motor operator pivots pin latch 425 in a direction opposite of its bias via link 424, thus releasing first pin 422. First pin 422 by action of the a spring 421 moves the breaker handle 44 and attached handle yoke 88 to a full clockwise position about bearing portion 94 to the position shown in FIGURE 9. Once the breaker mechanism spring 96 over-centers, the breaker mechanism spring 96 will cause the upper link 174 to pivot counter clockwise about pin 188. When the upper link 174 is driven counter clockwise, the lower link 194 is driven against the pivotal rivet 210, thus rotating the rotary contact assembly 56 clockwise into contact with the line strap 62 and the load strap 58 establishing a closed electrical circuit.
The apparatus as described provides for reduced closing times due to efficient utilization of the circuit breaker mechanism spring and the reduced operating motion to move the breaker handle to the "on" position. The apparatus also allows a reduction in the size of a motor operator, as the required stored energy is significantly reduced due to a shorter closing stroke and thereby the motor operator may be reduced in size because less energy is required to close the circuit eliminating the need for larger springs to store the customary closing energy. The reduced closing energy required will also require a smaller sized electrical charging system that will place less demands on the motor operator control system yielding greater operating efficiency. Lastly, the use of less closing energy reduces the mechanical stress on both the motor operator and the circuit breaker.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes may be made and
equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims
1. A motor operator mechanism for moving a breaker handle (44) of a circuit breaker (20) between off and on positions, said motor operator mechanism comprising:
a first pin (422) biased to engage said breaker handle (44) in a direction to close said circuit breaker (20);
a pin latch (425) configured to releasably engage said first pin (422) when said breaker handle (44) is in a position intermediate to said off and on positions, wherein releasing said pin latch (425) allows said first pin (422) to move said breaker handle (44) to the on position.
2. The motor operator mechanism of claim 1 further including:
a drive pin (418); and
a spring (421) extending between said drive pin (418) and said first pin (422), said drive pin (418) moves causing said first pin (422) to engage said breaker handle (44) moving said breaker handle (44) from said off position to said on position.
3. The motor operator mechanism of claim 1 further comprising:
a close mechanism (423) to operably move said pin latch (425).
4. The motor operator mechanism of claim 1 further comprising:
a drive system (410) to operably move said drive pin (418).
5. The motor operator mechanism of claim 1 wherein said pin latch (425) includes:
a first end (427); and
a second end (429) opposite said first end (427), said second end (429) releasably engages said first pin (422), and said pin latch (425) pivots about said first end (427).
6. The motor operator mechanism of claim 5 wherein said second end (429) is configured to engage and retain said first pin (422).
7. A motor operated circuit breaker (450) comprising:
a breaker handle (44);
a first contact (72) operably connected to said breaker handle (44);
a second contact (74) proximate to said first contact (72);
stationary contacts (64, 66) for electrical connection with said first contact (72) and said second contact (74);
a motor operator (430) for moving said breaker handle (44) between off and on positions, said first (72) and second contacts (74) are separated in said off position and said first (72) and second contacts (74) are closed in said on position;
a first pin (422) biased to engage said breaker handle (44) in a direction to close said first (72) and second contacts (74);
a pin latch (425) configured to releasably engage said first pin (422) when said breaker handle (44) is in a position intermediate to said off and on positions, wherein releasing said pin latch (425) allows said first pin (422) to move said handle (44)to close said first (72) and second (74) contacts.
8. The motor operated circuit breaker (450) of claim 7 further including:
a drive pin (418); and
a spring (421 ) extending between said drive pin (418) and said first pin (422), said drive pin (418) moves causing said first pin (422) to engage said breaker handle (44) moving said breaker handle (44) from said off position to said on position.
9. The motor operated circuit breaker (450) of claim 7 further comprising:
a close mechanism (423) to operably move said pin latch (425).
10. The motor operated circuit breaker (450) of claim 7 further comprising:
a drive system (410) to operably move said drive pin (418).
1 1. The motor operated circuit breaker (450) of claim 7 wherein said pin latch (425) includes:
a first end (427); and
a second end (429) opposite said first end (427), said second end (429) releasably engages said first pin (422), and said pin latch (425) pivots about said first end (427).
12. The motor operated circuit breaker (450) of claim 1 1 wherein said second end (429) is configured to engage and retain said first pin (422).
13. A motor operator mechanism (450) for moving a breaker handle (44) of a circuit breaker (20) between off and on positions, said motor operator mechanism comprising:
a biased first means (422) for engaging said breaker handle (44) in a direction to close said circuit breaker (20);
a latch means (425) for releasably engaging said first means (422) when said breaker handle (44) is in a position intermediate to said off and on positions, wherein releasing said latch means (425) allows said first means (422) to move said breaker handle (44) to the on position.
14. The motor operator mechanism of claim 13 further including:
a drive means (418) for driving said first means; and
a biasing means (421 ) for extending between said drive means (418) and said first means (422), said drive means (418) moves causing said first means (422) to engage said breaker handle (44) moving said breaker handle (44) from said off position to said on position.
15. The motor operator mechanism of claim 13 further comprising: a closing means (423) for operably moving said latch means (425).
16. The motor operator mechanism of claim 13 further comprising:
a drive system means (410) for operably moving said drive means (418).
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE60128832T DE60128832T2 (en) | 2001-01-30 | 2001-12-21 | COMPACT ENGINE DRIVE WITH HIGH SPEED FOR A PROTECTION SWITCH |
EP01991339A EP1358663B1 (en) | 2001-01-30 | 2001-12-21 | Compact high speed motor operator for a circuit breaker |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/772,637 | 2001-01-30 | ||
US09/772,637 US6448522B1 (en) | 2001-01-30 | 2001-01-30 | Compact high speed motor operator for a circuit breaker |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002061784A1 true WO2002061784A1 (en) | 2002-08-08 |
Family
ID=25095714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2001/049210 WO2002061784A1 (en) | 2001-01-30 | 2001-12-21 | Compact high speed motor operator for a circuit breaker |
Country Status (4)
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US (1) | US6448522B1 (en) |
EP (1) | EP1358663B1 (en) |
DE (1) | DE60128832T2 (en) |
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FR2578092B1 (en) | 1985-02-25 | 1987-03-06 | Merlin Gerin | CIRCUIT BREAKER WITH STATIC TRIGGER WITH SAMPLING AND LOCK AT THE LAST SIGNAL CRETE |
FR2578093B1 (en) | 1985-02-27 | 1987-03-06 | Merlin Gerin | UNIPOLAR AND NEUTRAL DIFFERENTIAL CIRCUIT BREAKER |
US4642431A (en) | 1985-07-18 | 1987-02-10 | Westinghouse Electric Corp. | Molded case circuit breaker with a movable electrical contact positioned by a camming spring loaded clip |
FR2589627B1 (en) | 1985-10-31 | 1988-08-26 | Merlin Gerin | CONTROL MECHANISM FOR LOW VOLTAGE ELECTRIC CIRCUIT BREAKER |
DE3679291D1 (en) | 1985-10-31 | 1991-06-20 | Merlin Gerin | KINEMATIC TRANSMISSION CHAIN BETWEEN THE CONTROL MECHANISM AND THE POLES OF AN ELECTRIC LOAD SWITCH WITH A SPRAYED INSULATION HOUSING. |
FR2592998B1 (en) | 1986-01-10 | 1988-03-18 | Merlin Gerin | TEST CIRCUIT FOR AN ELECTRONIC TRIGGER OF A DIFFERENTIAL CIRCUIT BREAKER. |
DE3688838T2 (en) | 1986-01-10 | 1994-03-03 | Merlin Gerin | Static release with test circuit for electrical circuit breakers. |
ES2020284B3 (en) | 1986-02-28 | 1991-08-01 | Merlin Gerin | CURRENT CUTTING DEVICE WITH STATIC SWITCH AND PROTECTION CIRCUIT BREAKER. |
FR2596576B1 (en) | 1986-03-26 | 1988-05-27 | Merlin Gerin | SELF-BLOWING ELECTRIC CIRCUIT BREAKER WITH IMPROVED DIELECTRIC HOLD |
FR2598266B1 (en) | 1986-04-30 | 1994-02-18 | Merlin Et Gerin | INSTANT STATIC TRIGGER FOR A LIMITING CIRCUIT BREAKER |
FR2602610B1 (en) | 1986-08-08 | 1994-05-20 | Merlin Et Gerin | STATIC TRIGGER OF AN ELECTRIC CIRCUIT BREAKER WITH CONTACT WEAR INDICATOR |
JPH0628767Y2 (en) | 1986-09-11 | 1994-08-03 | 三菱電機株式会社 | Circuit breaker |
FR2604294B1 (en) | 1986-09-23 | 1994-05-20 | Merlin Et Gerin | MULTIPOLAR DIFFERENTIAL CIRCUIT BREAKER WITH MODULAR ASSEMBLY |
FR2604295B1 (en) | 1986-09-23 | 1988-12-02 | Merlin Gerin | ELECTRICAL DIFFERENTIAL PROTECTION DEVICE WITH TEST CIRCUIT |
US4675481A (en) | 1986-10-09 | 1987-06-23 | General Electric Company | Compact electric safety switch |
US4733211A (en) | 1987-01-13 | 1988-03-22 | General Electric Company | Molded case circuit breaker crossbar assembly |
FR2612347B1 (en) | 1987-03-09 | 1989-05-26 | Merlin Gerin | STATIC TRIGGER COMPRISING A HOMOPOLAR CURRENT DETECTION CIRCUIT |
GB8705885D0 (en) | 1987-03-12 | 1987-04-15 | Y S Securities Ltd | Electrical switchgear |
EP0313106B1 (en) | 1987-03-12 | 1992-12-16 | Merlin Gerin Limited | Electrical switchgear |
FR2615323B1 (en) | 1987-05-11 | 1989-06-30 | Merlin Gerin | MODULAR CIRCUIT BREAKER WITH AUXILIARY TRIGGER BLOCK ASSOCIATED WITH A MULTIPOLAR CIRCUIT BREAKER |
FR2615322B1 (en) | 1987-05-11 | 1989-06-30 | Merlin Gerin | TRIP BAR OF A MULTIPOLAR CIRCUIT BREAKER ASSOCIATED WITH AN AUXILIARY TRIGGER BLOCK |
FR2616583B1 (en) | 1987-06-09 | 1995-01-06 | Merlin Gerin | CONTROL MECHANISM OF A MINIATURE ELECTRIC CIRCUIT BREAKER |
GB8713791D0 (en) | 1987-06-12 | 1987-07-15 | Bicc Plc | Electric circuit breaking apparatus |
FR2616957A1 (en) | 1987-06-18 | 1988-12-23 | Merlin Gerin | HIGH PRESSURE ARC EXTINGUISHING CHAMBER |
FR2617633B1 (en) | 1987-07-02 | 1989-11-17 | Merlin Gerin | CIRCUIT BREAKER WITH ROTATING ARC AND EXPANSION |
FR2621170A1 (en) | 1987-09-25 | 1989-03-31 | Merlin Gerin | BREAKER-LIMIT |
DE3852455T2 (en) | 1987-10-01 | 1996-04-18 | Cge Spa | Manual and electromagnetically operated contact arrangement for current-limiting switches. |
FR2621748B1 (en) | 1987-10-09 | 1996-07-05 | Merlin Gerin | STATIC TRIGGER OF A MOLDED CASE CIRCUIT BREAKER |
FR2622347B1 (en) | 1987-10-26 | 1995-04-14 | Merlin Gerin | CUTTING DEVICE FOR A MULTIPOLAR CIRCUIT BREAKER WITH DOUBLE ROTARY CONTACT |
FR2622737B1 (en) | 1987-11-04 | 1995-04-14 | Merlin Gerin | SELF-EXPANSIONAL ELECTRIC CIRCUIT BREAKER WITH VARIABLE EXTINCTION CHAMBER VOLUME |
FR2624650B1 (en) | 1987-12-10 | 1990-04-06 | Merlin Gerin | MULTIPOLAR CIRCUIT BREAKER WITH HIGH CALIBER MOLDED HOUSING |
FR2624649B1 (en) | 1987-12-10 | 1990-04-06 | Merlin Gerin | HIGH CALIBER MULTIPOLAR CIRCUIT BREAKER CONSISTING OF TWO ADJUSTED BOXES |
FR2624666B1 (en) | 1987-12-10 | 1990-04-06 | Merlin Gerin | |
US4831221A (en) | 1987-12-16 | 1989-05-16 | General Electric Company | Molded case circuit breaker auxiliary switch unit |
DE3802184A1 (en) | 1988-01-26 | 1989-08-03 | Licentia Gmbh | LOW VOLTAGE SWITCH WITH LOCKING LOBS |
FR2626713B1 (en) | 1988-01-28 | 1990-06-01 | Merlin Gerin | ELECTROMAGNETIC TRIGGER WITH TRIGGER THRESHOLD ADJUSTMENT |
FR2626724B1 (en) | 1988-01-28 | 1993-02-12 | Merlin Gerin | STATIC TRIGGER COMPRISING AN INSTANTANEOUS TRIGGER CIRCUIT INDEPENDENT OF THE SUPPLY VOLTAGE |
FR2628259A1 (en) | 1988-03-01 | 1989-09-08 | Merlin Gerin | ELECTRICAL SHUT-OFF CIRCUIT BREAKER BY SHOCKPING OR EXPANSION OF INSULATING GAS |
FR2628262B1 (en) | 1988-03-04 | 1995-05-12 | Merlin Gerin | CONTROL MECHANISM OF A TRIGGERING AUXILIARY BLOCK FOR MODULAR CIRCUIT BREAKER |
FR2630256B1 (en) | 1988-04-14 | 1995-06-23 | Merlin Gerin | HIGH SENSITIVITY ELECTROMAGNETIC TRIGGER |
FR2631485B1 (en) | 1988-05-13 | 1995-06-02 | Merlin Gerin | MINIATURE CIRCUIT BREAKER CONTROL MECHANISM WITH CONTACT WELDING INDICATOR |
FR2632771B1 (en) | 1988-06-10 | 1990-08-31 | Merlin Gerin | LOW VOLTAGE LIMITER CIRCUIT BREAKER WITH WATERPROOF CUTTING CHAMBER |
IT213976Z2 (en) | 1988-06-23 | 1990-03-05 | Cge Spa | STRUCTURE OF ELECTRIC CONTACTS IN WHICH THE AXIAL DRIVE FORCE IS ONLY A SMALL FRACTION OF THE FORCE EXERCISED ON THE CONTACTS. |
US4870531A (en) | 1988-08-15 | 1989-09-26 | General Electric Company | Circuit breaker with removable display and keypad |
FR2638909B1 (en) | 1988-11-04 | 1995-03-31 | Merlin Gerin | DIFFERENTIAL TRIGGER WITH TEST CIRCUIT AND SELF-PROTECTED OPENING REMOTE CONTROL |
FR2639148B1 (en) | 1988-11-16 | 1991-08-02 | Merlin Gerin | MAGNETIC TRIGGER WITH WIDE TRIGGER THRESHOLD ADJUSTMENT RANGE |
FR2639760B1 (en) | 1988-11-28 | 1996-02-09 | Merlin Gerin | MODULAR UR CIRCUIT BREAKER EQUIPPED WITH AN INDEPENDENT OR AUTOMATIC RESET TRIGGERING AUXILIARY BLOCK |
FR2640422B1 (en) | 1988-12-14 | 1996-04-05 | Merlin Gerin | MODULAR ASSEMBLY OF A MULTIPOLAR DIFFERENTIAL CIRCUIT BREAKER |
DE3843277A1 (en) | 1988-12-22 | 1990-06-28 | Bosch Gmbh Robert | Power output stage for electromagnetic loads |
FR2641898B1 (en) | 1989-01-17 | 1991-03-15 | Merlin Gerin | SELF-BLOWING ELECTRIC CIRCUIT BREAKER |
US4884164A (en) | 1989-02-01 | 1989-11-28 | General Electric Company | Molded case electronic circuit interrupter |
EP0385886B1 (en) | 1989-02-27 | 1994-11-09 | Merlin Gerin | Circuit breaker with a rotating arc and with a centrifugal effect of the extinguishing gas |
FR2644624B1 (en) | 1989-03-17 | 1996-03-22 | Merlin Gerin | ELECTRICAL CIRCUIT BREAKER WITH SELF-EXPANSION AND INSULATING GAS |
US4951019A (en) | 1989-03-30 | 1990-08-21 | Westinghouse Electric Corp. | Electrical circuit breaker operating handle block |
US5200724A (en) | 1989-03-30 | 1993-04-06 | Westinghouse Electric Corp. | Electrical circuit breaker operating handle block |
US5004878A (en) | 1989-03-30 | 1991-04-02 | General Electric Company | Molded case circuit breaker movable contact arm arrangement |
FR2646282B1 (en) | 1989-04-20 | 1996-03-22 | Merlin Gerin | MANUAL TEST AUXILIARY SWITCH FOR MODULAR CIRCUIT BREAKER |
GB2233155A (en) | 1989-04-27 | 1991-01-02 | Delta Circuits Protection | Electric circuit breaker |
SE461557B (en) | 1989-04-28 | 1990-02-26 | Asea Brown Boveri | CONTACT DEVICE FOR ELECTRICAL CONNECTORS |
FR2646738B1 (en) | 1989-05-03 | 1991-07-05 | Merlin Gerin | STATIC TRIGGER FOR A THREE-PHASE NETWORK PROTECTION CIRCUIT BREAKER FOR DETECTING THE TYPE OF FAULT |
IT1230203B (en) | 1989-05-25 | 1991-10-18 | Bassani Spa | AUTOMATIC SWITCH FOR MAGNETOTHERMAL PROTECTION WITH HIGH INTERRUPTION POWER. |
FR2648952B1 (en) | 1989-06-26 | 1991-09-13 | Merlin Gerin | LIMITING CIRCUIT BREAKER HAVING AN ELECTROMAGNETIC EFFECT CONTACT DELAY RETARDER |
FR2649259B1 (en) | 1989-07-03 | 1991-09-13 | Merlin Gerin | STATIC TRIGGER COMPRISING AN EARTH PROTECTION DESENSITIZATION SYSTEM |
US4943888A (en) | 1989-07-10 | 1990-07-24 | General Electric Company | Electronic circuit breaker using digital circuitry having instantaneous trip capability |
FR2650434B1 (en) | 1989-07-26 | 1995-11-24 | Merlin Gerin | LOW VOLTAGE CIRCUIT BREAKER WITH MULTIPLE CONTACTS AND HIGH CURRENTS |
DE8909831U1 (en) | 1989-08-16 | 1990-12-20 | Siemens Ag, 8000 Muenchen, De | |
FR2651915B1 (en) | 1989-09-13 | 1991-11-08 | Merlin Gerin | ULTRA-FAST STATIC CIRCUIT BREAKER WITH GALVANIC ISOLATION. |
FR2651919B1 (en) | 1989-09-13 | 1995-12-15 | Merlin Gerin | CIRCUIT BREAKER COMPRISING AN ELECTRONIC TRIGGER. |
FR2655766B1 (en) | 1989-12-11 | 1993-09-03 | Merlin Gerin | MEDIUM VOLTAGE HYBRID CIRCUIT BREAKER. |
FR2659177B1 (en) | 1990-03-01 | 1992-09-04 | Merlin Gerin | CURRENT SENSOR FOR AN ELECTRONIC TRIGGER OF AN ELECTRIC CIRCUIT BREAKER. |
FR2660794B1 (en) | 1990-04-09 | 1996-07-26 | Merlin Gerin | CONTROL MECHANISM OF AN ELECTRIC CIRCUIT BREAKER. |
FR2661776B1 (en) | 1990-05-04 | 1996-05-10 | Merlin Gerin | INSTANT TRIGGER OF A CIRCUIT BREAKER. |
IT219700Z2 (en) | 1990-05-29 | 1993-04-26 | Cge Spa | CLAMPING FIXING DEVICE WITH SNAP LOCK FOR CONTROL AND / OR SIGNALING UNIT |
FR2663175A1 (en) | 1990-06-12 | 1991-12-13 | Merlin Gerin | STATIC SWITCH. |
FR2663457B1 (en) | 1990-06-14 | 1996-06-07 | Merlin Gerin | ELECTRICAL CIRCUIT BREAKER WITH SELF-EXPANSION AND ARC ROTATION. |
FR2663780B1 (en) | 1990-06-26 | 1992-09-11 | Merlin Gerin | HIGH VOLTAGE CIRCUIT BREAKER WITH GAS INSULATION AND PNEUMATIC CONTROL MECHANISM. |
FR2665571B1 (en) | 1990-08-01 | 1992-10-16 | Merlin Gerin | ELECTRIC CIRCUIT BREAKER WITH ROTATING ARC AND SELF - EXPANSION. |
US5120921A (en) | 1990-09-27 | 1992-06-09 | Siemens Energy & Automation, Inc. | Circuit breaker including improved handle indication of contact position |
FR2671228B1 (en) | 1990-12-26 | 1996-07-26 | Merlin Gerin | CIRCUIT BREAKER COMPRISING AN INTERFACE CARD WITH A TRIGGER. |
US5262744A (en) | 1991-01-22 | 1993-11-16 | General Electric Company | Molded case circuit breaker multi-pole crossbar assembly |
US5140115A (en) | 1991-02-25 | 1992-08-18 | General Electric Company | Circuit breaker contacts condition indicator |
US5184717A (en) | 1991-05-29 | 1993-02-09 | Westinghouse Electric Corp. | Circuit breaker with welded contacts |
FR2677168B1 (en) | 1991-06-03 | 1994-06-17 | Merlin Gerin | MEDIUM VOLTAGE CIRCUIT BREAKER WITH REDUCED CONTROL ENERGY. |
FR2679039B1 (en) | 1991-07-09 | 1993-11-26 | Merlin Gerin | ELECTRICAL ENERGY DISTRIBUTION DEVICE WITH INSULATION CONTROL. |
FR2682529B1 (en) | 1991-10-10 | 1993-11-26 | Merlin Gerin | CIRCUIT BREAKER WITH SELECTIVE LOCKING. |
FR2682530B1 (en) | 1991-10-15 | 1993-11-26 | Merlin Gerin | RANGE OF LOW VOLTAGE CIRCUIT BREAKERS WITH MOLDED HOUSING. |
FR2682531B1 (en) | 1991-10-15 | 1993-11-26 | Merlin Gerin | MULTIPOLAR CIRCUIT BREAKER WITH SINGLE POLE BLOCKS. |
FR2682807B1 (en) | 1991-10-17 | 1997-01-24 | Merlin Gerin | ELECTRIC CIRCUIT BREAKER WITH TWO VACUUM CARTRIDGES IN SERIES. |
FR2682808B1 (en) | 1991-10-17 | 1997-01-24 | Merlin Gerin | HYBRID CIRCUIT BREAKER WITH AXIAL BLOWING COIL. |
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FR2683089B1 (en) | 1991-10-29 | 1993-12-31 | Merlin Gerin | OPERATING MECHANISM FOR TETRAPOLAR CIRCUIT BREAKER. |
FR2683675B1 (en) | 1991-11-13 | 1993-12-31 | Merlin Gerin | METHOD AND DEVICE FOR ADJUSTING A TECHNICAL TRIGGER WITH BILAME. |
FR2683938B1 (en) | 1991-11-20 | 1993-12-31 | Gec Alsthom Sa | CIRCUIT BREAKER WITH SULFUR HEXAFLUORIDE AND APPLICATIONS TO CELLS AND PREFABRICATED STATIONS AND SUBSTATIONS. |
FR2683940B1 (en) | 1991-11-20 | 1993-12-31 | Gec Alsthom Sa | MEDIUM VOLTAGE CIRCUIT BREAKER FOR INDOOR OR OUTDOOR USE. |
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FR2687249B1 (en) | 1992-02-07 | 1994-04-01 | Merlin Gerin | CONTROL MECHANISM OF A MOLDED BOX CIRCUIT BREAKER. |
FR2687250A1 (en) | 1992-02-07 | 1993-08-13 | Merlin Gerin | MULTIPLE CONTACTING CUTTING DEVICE. |
FR2688626B1 (en) | 1992-03-13 | 1994-05-06 | Merlin Gerin | CIRCUIT BREAKER WITH MOLDED BOX WITH BRIDGE OF BRAKE CONTACTS AT THE END OF PULSE STROKE. |
FR2688625B1 (en) | 1992-03-13 | 1997-05-09 | Merlin Gerin | CONTACT OF A MOLDED BOX CIRCUIT BREAKER |
FR2690563B1 (en) | 1992-04-23 | 1997-05-09 | Merlin Gerin | PLUG-IN CIRCUIT BREAKER WITH MOLDED HOUSING. |
FR2690560B1 (en) | 1992-04-23 | 1997-05-09 | Merlin Gerin | DEVICE FOR MECHANICAL INTERLOCKING OF TWO MOLDED BOX CIRCUIT BREAKERS. |
US5198956A (en) | 1992-06-19 | 1993-03-30 | Square D Company | Overtemperature sensing and signaling circuit |
FR2693027B1 (en) | 1992-06-30 | 1997-04-04 | Merlin Gerin | SELF-EXPANSION SWITCH OR CIRCUIT BREAKER. |
ES2090439T3 (en) * | 1992-09-10 | 1996-10-16 | Gec Alsthom T & D Ag | JUMP OPERATION FOR ELECTRIC SWITCHES. |
US5552755A (en) | 1992-09-11 | 1996-09-03 | Eaton Corporation | Circuit breaker with auxiliary switch actuated by cascaded actuating members |
KR940007922A (en) | 1992-09-28 | 1994-04-28 | 기타오카 다카시 | Circuit breaker |
FR2696275B1 (en) | 1992-09-28 | 1994-10-28 | Merlin Gerin | Molded case circuit breaker with interchangeable trip units. |
FR2696276B1 (en) | 1992-09-29 | 1994-12-02 | Merlin Gerin | Molded case circuit breaker with auxiliary contacts. |
FR2696866B1 (en) | 1992-10-13 | 1994-12-02 | Merlin Gerin | Three-position switch actuation mechanism. |
DE4234619C2 (en) | 1992-10-14 | 1994-09-22 | Kloeckner Moeller Gmbh | Overload relay to be combined with contactors |
FR2697669B1 (en) | 1992-10-29 | 1995-01-06 | Merlin Gerin | Auxiliary unit drawout circuit breaker. |
FR2697670B1 (en) | 1992-11-04 | 1994-12-02 | Merlin Gerin | Relay constituting a mechanical actuator to trip a circuit breaker or a differential switch. |
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FR2699324A1 (en) | 1992-12-11 | 1994-06-17 | Gen Electric | Auxiliary compact switch for circuit breaker - has casing placed inside circuit breaker box and housing lever actuated by button of microswitch and driven too its original position by spring |
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FR2701159B1 (en) | 1993-02-03 | 1995-03-31 | Merlin Gerin | Mechanical and electrical locking device for a remote control unit for modular circuit breaker. |
FR2701617B1 (en) | 1993-02-16 | 1995-04-14 | Merlin Gerin | Circuit breaker with remote control and sectioning function. |
EP0612090B1 (en) | 1993-02-16 | 1998-09-02 | Schneider Electric Sa | Rotation operating device for a circuit breaker |
ATE164027T1 (en) | 1993-03-17 | 1998-03-15 | Ellenberger & Poensgen | MULTIPOLE CIRCUIT SWITCH |
DE69406334T2 (en) | 1993-03-25 | 1998-02-26 | Schneider Electric Sa | Switchgear |
FR2703507B1 (en) | 1993-04-01 | 1995-06-02 | Merlin Gerin | Circuit breaker with a removable calibration device. |
FR2703824B1 (en) | 1993-04-07 | 1995-05-12 | Merlin Gerin | Multipolar limiter circuit breaker with electrodynamic repulsion. |
US5479143A (en) | 1993-04-07 | 1995-12-26 | Merlin Gerin | Multipole circuit breaker with modular assembly |
FR2703823B1 (en) | 1993-04-08 | 1995-05-12 | Merlin Gerin | Magneto-thermal trip module. |
FR2704091B1 (en) | 1993-04-16 | 1995-06-02 | Merlin Gerin | Device for adjusting the tripping threshold of a multipole circuit breaker. |
FR2704090B1 (en) | 1993-04-16 | 1995-06-23 | Merlin Gerin | AUXILIARY TRIGGER FOR CIRCUIT BREAKER. |
FR2704354B1 (en) | 1993-04-20 | 1995-06-23 | Merlin Gerin | CONTROL MECHANISM OF A MODULAR ELECTRIC CIRCUIT BREAKER. |
DE9308495U1 (en) | 1993-06-07 | 1994-10-20 | Weber Ag | Single or multi-pole NH fuse |
FR2707792B1 (en) | 1993-07-02 | 1995-09-01 | Telemecanique | Control and / or signaling unit with terminals. |
US5361052A (en) | 1993-07-02 | 1994-11-01 | General Electric Company | Industrial-rated circuit breaker having universal application |
GB9313928D0 (en) | 1993-07-06 | 1993-08-18 | Fenner Co Ltd J H | Improvements in and relating to electromechanical relays |
DE4337344B4 (en) | 1993-11-02 | 2005-08-25 | Moeller Gmbh | Current limiting contact system for circuit breakers |
FR2714771B1 (en) | 1994-01-06 | 1996-02-02 | Merlin Gerin | Differential protection device for a power transformer. |
FR2715517B1 (en) | 1994-01-26 | 1996-03-22 | Merlin Gerin | Differential trip unit. |
DE9401785U1 (en) | 1994-02-03 | 1995-07-20 | Kloeckner Moeller Gmbh | Key switch with a locking mechanism |
US5485343A (en) | 1994-02-22 | 1996-01-16 | General Electric Company | Digital circuit interrupter with battery back-up facility |
US5424701A (en) | 1994-02-25 | 1995-06-13 | General Electric | Operating mechanism for high ampere-rated circuit breakers |
DE4408234C1 (en) | 1994-03-11 | 1995-06-14 | Kloeckner Moeller Gmbh | Housing with accessories for power switch |
US5489755A (en) | 1994-03-18 | 1996-02-06 | General Electric Company | Handle operator assembly for high ampere-rated circuit breaker |
USD367265S (en) | 1994-07-15 | 1996-02-20 | Mitsubishi Denki Kabushiki Kaisha | Circuit breaker for distribution |
IT1274993B (en) | 1994-09-01 | 1997-07-29 | Abb Elettrocondutture Spa | BASIC ELECTRONIC CIRCUIT FOR DIFFERENTIAL TYPE SWITCHES DEPENDENT ON THE MAINS VOLTAGE |
US5585609A (en) | 1994-09-28 | 1996-12-17 | Siemens Energy & Automation, Inc. | Circuit breaker with movable main contact multi-force-level biasing element |
US5519561A (en) | 1994-11-08 | 1996-05-21 | Eaton Corporation | Circuit breaker using bimetal of thermal-magnetic trip to sense current |
US5534835A (en) | 1995-03-30 | 1996-07-09 | Siemens Energy & Automation, Inc. | Circuit breaker with molded cam surfaces |
US5608367A (en) | 1995-11-30 | 1997-03-04 | Eaton Corporation | Molded case circuit breaker with interchangeable trip unit having bimetal assembly which registers with permanent heater transformer airgap |
IT1292453B1 (en) | 1997-07-02 | 1999-02-08 | Aeg Niederspannungstech Gmbh | ROTATING GROUP OF CONTACTS FOR HIGH FLOW SWITCHES |
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-
2001
- 2001-01-30 US US09/772,637 patent/US6448522B1/en not_active Expired - Lifetime
- 2001-12-21 WO PCT/US2001/049210 patent/WO2002061784A1/en active IP Right Grant
- 2001-12-21 EP EP01991339A patent/EP1358663B1/en not_active Expired - Lifetime
- 2001-12-21 DE DE60128832T patent/DE60128832T2/en not_active Expired - Lifetime
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US3328731A (en) * | 1965-06-14 | 1967-06-27 | Huska Paul | Combined electrical circuit breaker and actuator |
EP0506066A1 (en) * | 1991-03-27 | 1992-09-30 | Moeller GmbH | Motor drive for electric switching devices, in particular power circuit-breakers |
EP0612091A1 (en) * | 1993-02-16 | 1994-08-24 | Schneider Electric Sa | Remote-controlled circuit-breaker with resetting cam |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103280383A (en) * | 2013-06-03 | 2013-09-04 | 江苏辉能电气有限公司 | Reclosing mechanism of residual-current circuit breaker |
Also Published As
Publication number | Publication date |
---|---|
DE60128832D1 (en) | 2007-07-19 |
EP1358663B1 (en) | 2007-06-06 |
US20020100674A1 (en) | 2002-08-01 |
DE60128832T2 (en) | 2008-02-07 |
EP1358663A1 (en) | 2003-11-05 |
US6448522B1 (en) | 2002-09-10 |
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