CN209896005U - Plastic case circuit breaker - Google Patents
Plastic case circuit breaker Download PDFInfo
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- CN209896005U CN209896005U CN201921261081.5U CN201921261081U CN209896005U CN 209896005 U CN209896005 U CN 209896005U CN 201921261081 U CN201921261081 U CN 201921261081U CN 209896005 U CN209896005 U CN 209896005U
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- circuit breaker
- surge protection
- wiring board
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Abstract
The utility model relates to a moulded case circuit breaker, including setting up surge protection module and the power line carrier module in the upper cover, surge protection module sets up in the handle top, the power line carrier module sets up the one side at the handle, surge protection module and power line carrier module be electric connection respectively on the wiring board, be provided with A looks conductive copper bar on the A looks return circuit, be provided with B looks conductive copper bar on the B looks return circuit, be provided with C looks conductive copper bar on the C looks return circuit, the structure of A looks conductive copper bar, B looks conductive copper bar, C looks conductive copper bar is unanimous, and the moving contact is connected to the one end of A looks conductive copper bar, and the other end of A looks conductive copper bar is connected on binding post, is provided with a portion of bending that is the Z type on the A looks conductive copper bar, the current transformer suit is in the. The utility model discloses a structure that changes electrically conductive system has reduced the volume of circuit breaker, and moulded case circuit breaker takes lightning protection, remote carrier communication's function.
Description
Technical Field
The utility model relates to a low-voltage electrical field especially relates to a moulded case circuit breaker.
Background
The molded case circuit breaker can play the real-time protection effect to power supply line, mechanical equipment, can automatic cutout circuit when circuit and equipment take place to transship or short circuit and its undervoltage trouble, and the molded case circuit breaker is installed in the switch board usually, and on the female arranging of being exported by the transformer was connected to one side electricity of molded case circuit breaker, the opposite side electricity of molded case circuit breaker was connected to user's family circuit.
The existing molded case circuit breaker has the following defects: 1. the conductive system of the molded case circuit breaker is unreasonable in structural design, and occupies a large internal space of the circuit breaker, so that the molded case circuit breaker has the defects of large volume and unreliable performance; 2. when the power distribution cabinet is struck by lightning, the instantaneous ultrahigh voltage generated by the lightning strike is not grounded through a transformer to release charges, but is directly led to a user family, so that electric appliances at the side of the user family are burnt and damaged; 3. the moulded case circuit breaker lacks and terminal equipment communication's ability, can't judge the concrete position that the trouble took place the very first time when the circuit breaks down, greatly increased the maintenance degree of difficulty. Generally speaking, the utility model discloses aim at designing a small moulded case circuit breaker to solve the defect that above-mentioned moulded case circuit breaker exists.
Disclosure of Invention
In view of this, the utility model aims at providing a moulded case circuit breaker small, performance safe and reliable, take surge protection and ground protection to can communicate with terminal equipment, realize the control to moulded case circuit breaker, reach the purpose of moulded case circuit breaker intelligence thing networking.
In order to achieve the above object, the present invention adopts such a molded case circuit breaker, which comprises a base, a middle seat, an upper cover, an operating mechanism, a moving contact, a static contact, a wiring board disposed in the middle seat, and a conductive system disposed in the base, wherein the conductive system comprises an a-phase loop, a B-phase loop, a C-phase loop, and an N-phase loop, current transformers are disposed on the a-phase loop, the B-phase loop, and the C-phase loop, the base is mounted on a guide rail, the operating mechanism comprises a handle, the handle extends to the surface of the upper cover, the molded case circuit breaker further comprises a surge protection module and a power carrier module disposed in the upper cover, the surge protection module is disposed above the handle, the power carrier module is disposed on one side of the handle, the surge protection module and the power carrier module are respectively electrically connected to the wiring board, and an a-phase conductive copper bar is disposed on, the B-phase circuit is provided with a B-phase conductive copper bar, the C-phase circuit is provided with a C-phase conductive copper bar, the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are consistent in structure, one end of the A-phase conductive copper bar is connected with the moving contact, the other end of the A-phase conductive copper bar is connected with the wiring terminal, a Z-shaped bending portion is arranged on the A-phase conductive copper bar, and the current transformer is sleeved on the bending portion.
The surge protection module is connected with a wiring board of the molded case circuit breaker, when a power distribution cabinet where the molded case circuit breaker is located is struck by lightning, the surge protection module can absorb surge current generated by the lightning stroke and can effectively protect electric appliances at the side of a user family from being damaged, the power carrier module is connected with the wiring board of the molded case circuit breaker, the power carrier module is coupled with electric signals with different frequencies on a power line of the molded case circuit breaker, the electric signals are transmitted to terminal monitoring equipment along with the power line, the terminal monitoring equipment realizes small-range power monitoring on each molded case circuit breaker according to high-frequency signals to enable the molded case circuit breaker to be networked with the terminal monitoring equipment, the surge protection module and the power carrier module are both arranged in the upper cover, the height of the upper cover is effectively utilized, and a conductive system arranged on the base is formed by arranging the current transformer on an A-, On B looks conductive copper bar, C looks conductive copper bar, effectively shortened current transformer's overall height, reduced the space that current transformer occupied to this moulded case circuit breaker base's height has effectively been reduced. The utility model discloses moulded case circuit breaker structurally has small, rationally distributed advantage, has lightning protection, remote communication's technical advantage in the function.
The utility model discloses further set up to the wiring board respectively with A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit electricity be connected, be formed with the electrically conductive clamping piece of multi-disc on the wiring board, form the electrically conductive inserted sheet of multi-disc on the surge protection module, the surge protection module forms the electricity with the wiring board through the cooperation of electrically conductive inserted sheet and electrically conductive clamping piece and is connected.
The surge protection module is connected to the molded case circuit breaker in a plugging and pulling mode, and assembly and subsequent replacement of the molded case circuit breaker are facilitated.
The utility model discloses further set up to be provided with the grounding piece in one side of wiring board, form the constant head tank on the well seat, the one end and the wiring board electricity of grounding piece are connected, and the other end setting of grounding piece is in the constant head tank, the ground hole that runs through well seat and base is formed to the below of constant head tank, be provided with the ground screw on the other end of grounding piece, the ground screw runs through grounding piece, ground hole after in proper order on the guide rail, the guide rail is connected to the ground, surge protection module and wiring board all realize common ground connection through the grounding piece.
The ground wire on the above-mentioned moulded case circuit breaker passes through the guide of ground plate and ground screw, fixed connection is to the guide rail on, then connect the ground connection that realizes moulded case circuit breaker to ground through the guide rail, make the instantaneous heavy current that thunderbolt or line fault produced can directly release to the ground, avoid moulded case circuit breaker itself to destroy, protect user's family electrical apparatus not influenced simultaneously, and such ground connection mode simple structure, simple to operate, it is with low costs, the installer only need with ground screw pass the grounding lug be connected to the guide rail on can.
The utility model discloses further set up to surge protection module and include a plurality of FUSEs FUSE, a plurality of lightning protection piezo-resistor SPD and gas discharge tube GDT, gas discharge tube GDT's one end earth connection is connected with FUSE FUSE and lightning protection piezo-resistor SPD between A looks return circuit and gas discharge tube GDT's the other end, be connected with FUSE FUSE and lightning protection piezo-resistor SPD between B looks return circuit and the other end of gas discharge tube GDT, be connected with FUSE FUSE and lightning protection piezo-resistor SPD between C looks return circuit and gas discharge tube GDT's the other end, be connected with lightning protection piezo-resistor SPD between N looks return circuit and the other end of gas discharge tube GDT.
When the molded case circuit breaker is struck by lightning, the resistance of the lightning protection voltage dependent resistor SPD connected between each phase loop (A, B, C, N phase) and the ground wire is rapidly reduced when the instantaneous voltage is higher than a certain value, so that the heavy current is conducted; when the current passing through the lightning protection piezoresistor SPD is overlarge and the duration is too long, the FUSE FUSE connected between each phase loop (A, B, C phase) and the ground wire is fused; the gas discharge tube GDT is conducted when the voltage at two ends of the gas discharge tube GDT is increased to exceed the insulation strength of gas in the gas discharge tube GDT, and the shared gas discharge tube GDT is used for accelerating the conduction of the gas discharge tube GDT by applying the lightning stroke voltage of each phase at two ends of the gas discharge tube GDT. When the molded case circuit breaker is struck by lightning, no matter which phase loop generates surge current, most of the surge current generated by the lightning stroke is absorbed through the lightning protection piezoresistor SPD, and then the rest surge current is released to the ground through the gas discharge tube GDT, so that the surge protection module finishes the gradual release of the lightning stroke energy.
The utility model discloses further set up to current transformer and include iron core, two coil winding of suit in the portion of bending, the iron core be the square frame form, two coil winding symmetries set up on the iron core.
The horizontal design of the current transformer greatly reduces the height of a conductive system and optimizes the internal structure of the molded case circuit breaker.
The utility model discloses further set up to surge protection module and include surge protection module shell and set up the circuit board in surge protection module shell, the bottom of electrically conductive inserted sheet is fixed on the circuit board, and the top of electrically conductive inserted sheet extends to the outside of surge protection module shell, form the round hole on the electrically conductive inserted sheet, the electrically conductive clamping sheet includes first clamping piece and second clamping piece, and the medial surface of first clamping piece and the medial surface of second clamping piece form the bump of mutual symmetry, and one side that first clamping piece is close to electrically conductive inserted sheet and one side that the second clamping piece is close to electrically conductive inserted sheet are all turned over outwards and are rolled over and form guide portion, electrically conductive inserted sheet passes through the cooperation of round hole and two bumps and is connected with electrically conductive clamping.
Above-mentioned electrically conductive inserted sheet is connected between first clamping piece and second clamping piece under the guide effect of guide portion, realizes firm electricity and connects under the cooperation of bump and round hole, improves the reliability that surge protection module connects.
The utility model discloses further set up to the constant head tank and be close to one side formation of wiring board and let the position mouth, the grounding piece includes connecting portion, the first portion of turning over and the second portion of turning over that forms perpendicular to connecting portion are extended respectively to the both sides of connecting portion in the head and the tail both ends of connecting portion, first portion of turning over sets up and is being connected in the mouth of stepping down and with the wiring board electricity, the second portion of turning over sets up in the bottom of constant head tank, and ground screw connects in the second portion of turning over.
The shell of the molded case circuit breaker is provided with a certain space for the grounding piece, so that the grounding piece is convenient to install, and the grounding piece connects the grounding potential inside the molded case circuit breaker with the ground.
The utility model discloses further set up to the side formation fluting of upper cover, the fluting is just to surge protection module, be provided with the shrouding in the fluting.
The sealing plate isolates the surge protection module from the outside.
The utility model discloses further set up to cover the formation mounting groove on, the wiring mouth has been seted up to the bottom of mounting groove, just form the connection terminal to the position of wiring mouth on the wiring board, power line carrier module sets up in the mounting groove, and power line carrier module passes through the connection terminal to be connected with the wiring board electricity, power line carrier module's surface is provided with the apron, the apron is fixed to cover last.
The wiring seat is convenient for the electric connection of the power carrier module and the wiring board, the cover plate enables the power carrier module to be isolated from the outside, and the use reliability of the molded case circuit breaker is improved.
The utility model discloses further set up to power line carrier module and include high frequency generating circuit, signal coupling circuit, high frequency generating circuit is connected with signal coupling circuit, signal coupling circuit couples the high frequency signal that high frequency generating circuit produced to last A looks return circuit or B looks return circuit or C looks return circuit on.
The high-frequency generator outputs high-frequency signals, and due to the fact that large signal loss exists between three-phase power lines, power carrier signals can only be transmitted on a single-phase power line, the high-frequency signals are coupled to the A phase, the B phase or the C phase of the molded case circuit breaker through the signal coupling circuit, remote transmission of the carrier signals is achieved, terminal monitoring equipment achieves small-range power monitoring of each molded case circuit breaker according to the high-frequency signals, the position of a fault line can be judged quickly and accurately when the line breaks down, and therefore overhauling efficiency is improved.
Drawings
Fig. 1 is an exploded view of a molded case circuit breaker according to an embodiment of the present invention.
Fig. 2 is a perspective view of a conductive system according to an embodiment of the present invention.
Fig. 3 is a sectional view of the molded case circuit breaker according to the embodiment of the present invention.
Fig. 4 is an exploded view of the molded case circuit breaker according to the embodiment of the present invention.
Fig. 5 is an exploded view of the molded case circuit breaker according to the embodiment of the present invention.
Fig. 6 is an explosion diagram of a surge protection module according to an embodiment of the present invention.
Fig. 7 is a perspective view of a surge protection module and a conductive clip according to an embodiment of the present invention.
Fig. 8 is a front view of the molded case circuit breaker of the embodiment of the present invention with the upper cover removed.
Fig. 9 is a cross-sectional view taken along a-a in fig. 8.
Fig. 10 is a perspective view of a grounding plate according to an embodiment of the present invention.
Fig. 11 is a perspective view of the conductive insert and the conductive clip according to the embodiment of the present invention.
Fig. 12 is a schematic block diagram of a power line carrier module according to an embodiment of the present invention.
Fig. 13 is a schematic circuit diagram of a surge protection module according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-3, the present invention relates to a molded case circuit breaker, which comprises a base 1, a middle base 2, an upper cover 3, an operating mechanism 4, a movable contact 51, a fixed contact 52, a wiring board 6 disposed in the middle base 2, and a conductive system 7 disposed in the base 1, wherein the conductive system 7 comprises an a-phase loop 71, a B-phase loop 72, a C-phase loop 73, and an N-phase loop 74, current transformers 75 are disposed on the a-phase loop 71, the B-phase loop 72, and the C-phase loop 73, the base 1 is mounted on a guide rail 11, the operating mechanism 4 comprises a handle 41, the handle 41 extends to the surface of the upper cover 3, the molded case circuit breaker further comprises a surge protection module 8 and a power carrier module 9 disposed in the upper cover 3, the surge protection module 8 is disposed above the handle 41, the power carrier module 9 is disposed on one side of the handle 41, the surge protection module 8 and the power carrier module 9 are electrically connected to the wiring board 6, the current transformer 75 comprises an iron core 751 and two coil windings 752, the iron core 751 is in a square frame shape, and the two coil windings 752 are symmetrically arranged on the iron core 751.
As shown in fig. 4, 5, 6, 7, and 11, the wiring board is electrically connected to the phase a loop 71, the phase B loop 72, the phase C loop 73, and the phase N loop 74, respectively, a plurality of conductive clips 61 are formed on the wiring board 6, the surge protection module 8 includes a surge protection module housing 82, a circuit board 83 disposed in the surge protection module housing 82, and a plurality of conductive inserts 81, the bottom of the conductive inserts 81 is fixed on the circuit board 83, the top of the conductive inserts 81 extends to the outside of the surge protection module housing 82, a circular hole 811 is formed on the conductive inserts 81, the conductive clips 61 include a first clip 611 and a second clip 612, inner side surfaces of the first clip 611 and the second clip 612 form symmetrical bumps 613, one side of the first clip 611 close to the conductive inserts 81 and one side of the second clip 612 close to the conductive inserts 81 are both turned outwards to form a guiding portion 614, the conductive insertion sheet 81 is connected with the conductive clamping sheet 61 through the matching of the round hole 811 and the two salient points 613, a slot 31 is formed on the side surface of the upper cover 3, the slot 31 is just opposite to the surge protection module 8, and a sealing plate 32 is arranged in the slot 31.
As shown in fig. 13, the surge protection module includes a plurality of FUSEs, a plurality of lightning protection piezoresistors SPD, and a gas discharge tube GDT, one end of the gas discharge tube GDT is connected to a ground wire, the FUSEs and the lightning protection piezoresistors SPD are connected between the a-phase loop and the other end of the gas discharge tube GDT, the FUSEs and the lightning protection piezoresistors SPD are connected between the B-phase loop and the other end of the gas discharge tube GDT, the FUSEs and the lightning protection piezoresistors SPD are connected between the C-phase loop and the other end of the gas discharge tube GDT, and the lightning protection piezoresistors SPD are connected between the N-phase loop and the other end of the gas discharge tube GDT.
As shown in fig. 5, 8, 9 and 10, one side of the wiring board 6 is provided with a grounding piece 10, a positioning groove 21 is formed on the middle seat 2, a position-giving opening 211 is formed on one side of the positioning groove 21 close to the wiring board, the grounding strip 10 comprises a connecting part 101, the head and the tail ends of the connecting part 101 extend to two sides of the connecting part 101 respectively to form a first folding part 102 and a second folding part 103 which are perpendicular to the connecting part 101, the first folding part 102 is arranged at the position-giving opening 211 and is electrically connected with the wiring board 6, the second folding part 103 is arranged at the bottom of the positioning groove 21, the grounding screw 23 is connected on the second folding part 103, a grounding hole 22 penetrating through the middle seat 2 and the base 1 is formed below the positioning groove 21, the grounding screw 23 penetrates through the second turnover part 103 and the grounding hole 22 in sequence and then is fixed on the guide rail 11, the guide rail 11 is connected to the ground, and the surge protection module 8 and the wiring board 6 are commonly grounded through the grounding piece 10.
As shown in fig. 4 and 12, a mounting groove 33 is formed on the upper cover 3, a wiring port 331 is opened at the bottom of the mounting groove 33, a wiring seat 62 is formed at a position on the wiring board 6 facing the wiring port 331, the power carrier module 9 is disposed in the mounting groove 33, the power carrier module 9 is electrically connected to the wiring board 6 through the wiring seat 62, a cover plate 34 is disposed on the surface of the power carrier module 9, the cover plate 34 is fixed on the upper cover 3, the power carrier module 9 includes a high-frequency generating circuit 91 and a signal coupling circuit 92, the high-frequency generating circuit 91 is connected to the signal coupling circuit 92, and the signal coupling circuit 92 couples a high-frequency signal generated by the high-frequency generating circuit 91 to the upper a-phase circuit 71, the B-phase circuit 72 or the C-phase circuit 73.
Claims (10)
1. The utility model provides a moulded case circuit breaker, includes base, well seat, upper cover, operating device, moving contact, static contact, sets up wiring board in well seat, sets up the electrically conductive system in the base, electrically conductive system includes A looks return circuit, B looks return circuit, C looks return circuit, N looks return circuit, all is provided with current transformer on A looks return circuit, B looks return circuit, the C looks return circuit, the pedestal mounting is on the guide rail, operating device includes the handle, and the handle extends to upper cover surface, its characterized in that: the plastic case circuit breaker further comprises a surge protection module and a power carrier module, wherein the surge protection module and the power carrier module are arranged in the upper cover, the surge protection module is arranged above the handle, the power carrier module is arranged on one side of the handle, the surge protection module and the power carrier module are respectively and electrically connected to the wiring board, an A-phase conductive copper bar is arranged on the A-phase loop, a B-phase conductive copper bar is arranged on the B-phase loop, a C-phase conductive copper bar is arranged on the C-phase loop, the A-phase conductive copper bar, the B-phase conductive copper bar and the C-phase conductive copper bar are consistent in structure, one end of the A-phase conductive copper bar is connected with the moving contact, the other end of the A-phase conductive copper bar is connected to the wiring terminal, a Z-shaped bending portion is.
2. The molded case circuit breaker according to claim 1, wherein: the surge protection module is characterized in that the wiring board is respectively electrically connected with the A-phase loop, the B-phase loop, the C-phase loop and the N-phase loop, a plurality of conductive clamping pieces are formed on the wiring board, a plurality of conductive insertion pieces are formed on the surge protection module, and the surge protection module is electrically connected with the wiring board through the matching of the conductive insertion pieces and the conductive clamping pieces.
3. The molded case circuit breaker according to claim 2, wherein: one side of wiring board is provided with the grounding lug, form the constant head tank on the well seat, the one end and the wiring board electricity of grounding lug are connected, and the other end setting of grounding lug is in the constant head tank, the ground connection hole that runs through well seat and base is formed to the below of constant head tank, be provided with the ground screw on the other end of grounding lug, the ground screw runs through grounding lug, ground connection hole after-fixing to the guide rail in proper order, the guide rail is connected to the ground, surge protection module and wiring board all realize common ground connection through the grounding lug.
4. A molded case circuit breaker according to claim 2 or 3, characterized in that: the surge protection module comprises a plurality of FUSEs, a plurality of lightning protection piezoresistors and a gas discharge tube GDT, one end of the gas discharge tube GDT is connected with a ground wire, the FUSEs and the lightning protection piezoresistors are connected between the A-phase loop and the other end of the gas discharge tube GDT, the FUSEs and the lightning protection piezoresistors are connected between the B-phase loop and the other end of the gas discharge tube GDT, the FUSEs and the lightning protection piezoresistors are connected between the C-phase loop and the other end of the gas discharge tube GDT, and the lightning protection piezoresistors are connected between the N-phase loop and the other end of the gas discharge tube GDT.
5. A molded case circuit breaker according to claim 1, 2 or 3, characterized in that: the current transformer comprises an iron core and two coil windings, wherein the iron core and the two coil windings are sleeved on the bending portion, the iron core is in a square frame shape, and the two coil windings are symmetrically arranged on the iron core.
6. A molded case circuit breaker according to claim 2 or 3, characterized in that: surge protection module includes surge protection module shell and sets up the circuit board in surge protection module shell, the bottom of electrically conductive inserted sheet is fixed on the circuit board, and the top of electrically conductive inserted sheet extends to the outside of surge protection module shell, form the round hole on the electrically conductive inserted sheet, electrically conductive clamping piece includes first clamping piece and second clamping piece, and the medial surface of first clamping piece and the medial surface of second clamping piece form the bump of mutual symmetry, and one side that first clamping piece is close to electrically conductive inserted sheet and one side that the second clamping piece is close to electrically conductive inserted sheet all turn over a book and form guide portion outward, electrically conductive inserted sheet passes through the cooperation of round hole and two bumps and is connected with electrically conductive clamping piece.
7. A molded case circuit breaker according to claim 3, wherein: the constant head tank is close to one side formation of wiring board and lets a mouthful, the grounding lug includes connecting portion, the first portion of turning over and the second portion of turning over that the both ends of connecting portion extended formation perpendicular to connecting portion to the both sides of connecting portion respectively, first portion of turning over sets up and is being connected in the mouth of stepping down and with the wiring board electricity, the second portion of turning over sets up in the bottom of constant head tank, and ground screw connects on the second portion of turning over.
8. A molded case circuit breaker according to claim 2 or 3, characterized in that: a notch is formed in the side face of the upper cover and faces the surge protection module, and a sealing plate is arranged in the notch.
9. A molded case circuit breaker according to claim 1, 2 or 3, characterized in that: the utility model discloses a power line carrier module, including wiring board, upper cover and power line carrier module, the wiring board is provided with wiring mouth, cover and form the mounting groove on, the wiring mouth has been seted up to the bottom of mounting groove, just form the connection terminal to the position of wiring mouth on the wiring board, power line carrier module sets up in the mounting groove, and power line carrier module passes through the connection terminal and is connected with the wiring board electricity, power line carrier module's surface is provided with the apron.
10. The molded case circuit breaker according to claim 9, wherein: the power carrier module comprises a high-frequency generating circuit and a signal coupling circuit, wherein the high-frequency generating circuit is connected with the signal coupling circuit, and the signal coupling circuit couples a high-frequency signal generated by the high-frequency generating circuit to an upper A-phase loop, a B-phase loop or a C-phase loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261081.5U CN209896005U (en) | 2019-08-06 | 2019-08-06 | Plastic case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921261081.5U CN209896005U (en) | 2019-08-06 | 2019-08-06 | Plastic case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209896005U true CN209896005U (en) | 2020-01-03 |
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ID=69002116
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921261081.5U Active CN209896005U (en) | 2019-08-06 | 2019-08-06 | Plastic case circuit breaker |
Country Status (1)
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| CN (1) | CN209896005U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110379682A (en) * | 2019-08-06 | 2019-10-25 | 海格科技股份有限公司 | A kind of breaker of plastic casing |
| CN111697550A (en) * | 2020-04-29 | 2020-09-22 | 宁波宏大电梯有限公司 | Main power supply loop for escalator control system |
-
2019
- 2019-08-06 CN CN201921261081.5U patent/CN209896005U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110379682A (en) * | 2019-08-06 | 2019-10-25 | 海格科技股份有限公司 | A kind of breaker of plastic casing |
| CN111697550A (en) * | 2020-04-29 | 2020-09-22 | 宁波宏大电梯有限公司 | Main power supply loop for escalator control system |
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