CN215266154U - DPN electric leakage circuit breaker with combined type electromagnetism tripping device - Google Patents
DPN electric leakage circuit breaker with combined type electromagnetism tripping device Download PDFInfo
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- CN215266154U CN215266154U CN202121733876.9U CN202121733876U CN215266154U CN 215266154 U CN215266154 U CN 215266154U CN 202121733876 U CN202121733876 U CN 202121733876U CN 215266154 U CN215266154 U CN 215266154U
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Abstract
The utility model discloses a DPN leakage circuit breaker with combined type electromagnetic tripping mechanism, the DPN leakage circuit breaker internally mounted traditional short-circuit protection magnetic trip coil's position installation combined type electromagnetic tripping mechanism, combined type electromagnetic tripping mechanism includes the magnetic support and installs the combined type electromagnetic trip solenoid coil assembly on the magnetic support, and combined type electromagnetic trip solenoid coil assembly includes interior coil skeleton, electronic control electromagnetic trip solenoid coil, outer coil skeleton and the electronic control electromagnetic trip solenoid coil that cover the establishment from inside to outside in proper order; the inner hole of the inner coil framework is sequentially provided with a movable iron core, a firing pin, a pressure spring and a static iron core, and the magnetic support, the movable iron core and the static iron core form a closed magnetic circuit; the DPN residual current circuit breaker comprises a live wire switch channel and a zero line switch channel. The utility model discloses at the inside combined type electromagnetism tripping device that installs additional of DPN electric leakage circuit breaker structure, simplified DPN electric leakage circuit breaker's volume.
Description
Technical Field
The utility model relates to a residual current circuit breaker technical field especially relates to a DPN residual current circuit breaker with combined type electromagnetism tripping device.
Background
DIN standard rail-mounted Miniature Circuit Breakers (MCB) make contributions to the standardization and miniaturization of circuit breakers and matched switch cabinets and distribution boxes. For many years, the size of the electrical switch is reduced as much as possible while the whole electrical industry meets the functions, and good social benefits are obtained in the aspects of saving space and reducing material consumption to the maximum extent. The successful development of the DPN circuit breaker, namely the MCB is extremely miniaturized, so that the DPN is actually a 1P + N type bipolar circuit breaker with N poles without overload and short-circuit protection, but the thickness of the DPN is only 1/2 of the common bipolar MCB with the same specification (the thickness of the common zero-line and live-line MCB is 36 mm, and the DPN is only 18 mm). RCBO refers to a breaker with leakage protection, and a leakage protection function is added on the basis of a common breaker, while DPN-RCBO refers to a DPN type breaker with a leakage protection function, and the DPN does not need to be increased by 18 mm any more because of an external leakage protection accessory. The current 36 mm thickness of miniaturized DPN-RCBO can generally achieve 32 ampere specification. However, if the leakage protection unit is added on one side of the DPN breaker in the thickness direction, the DPN-RCBO is increased to 4 modules in the thickness direction, and the space required by installation is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a DPN electric leakage circuit breaker with combined type electromagnetism tripping device constructs installs combined type electromagnetism tripping device additional inside DPN electric leakage circuit breaker structure, does not change 18 millimeters DPN circuit breaker thickness dimension, has still given the earth leakage protection function, has reduced DPN electric leakage circuit breaker equipment volume.
In order to achieve the above object, the utility model provides a following scheme:
a DPN electric leakage circuit breaker with a combined type electromagnetic tripping mechanism is characterized in that the combined type electromagnetic tripping mechanism is arranged at the position where a traditional short-circuit protection magnetic tripping coil is arranged in the DPN electric leakage circuit breaker, the combined type electromagnetic tripping mechanism comprises a magnetic support and a combined type electromagnetic tripping solenoid coil assembly arranged on the magnetic support, the combined type electromagnetic tripping solenoid coil assembly comprises an inner coil framework, a first electromagnetic tripping solenoid coil, an outer coil framework and a second electromagnetic tripping solenoid coil, the inner coil framework, the outer coil framework and the second electromagnetic tripping solenoid coil are sequentially sleeved from inside to outside, the first electromagnetic tripping solenoid coil is wound on the inner coil framework, the outer coil framework is of an insulating structure and is sleeved outside the first electromagnetic tripping solenoid coil, and the second electromagnetic tripping solenoid coil is wound on the outer coil framework; the first electromagnetic tripping solenoid coil is an electronic control electromagnetic tripping solenoid coil, and the second electromagnetic tripping solenoid coil is a short-circuit protection electromagnetic tripping solenoid coil; or the first electromagnetic tripping solenoid coil is a short-circuit protection electromagnetic tripping solenoid coil, and the second electromagnetic tripping solenoid coil is an electronic control electromagnetic tripping solenoid coil;
an inner hole of the inner coil framework is sequentially provided with a movable iron core, a firing pin, a pressure spring and a static iron core, the movable iron core is tightly matched and fixedly installed with the firing pin, and the pressure spring is sleeved outside the firing pin and arranged between the movable iron core and the static iron core; the striker penetrates through an inner hole of the static iron core and forms sliding fit with the inner hole of the static iron core; the static iron core is fixedly arranged at the right end of the inner hole of the inner coil framework in a tight fit manner; the magnetic bracket, the movable iron core and the static iron core form a closed magnetic circuit;
DPN residual current circuit breaker includes live wire and two way switch channel of zero line, and wherein the live wire is the switch channel all the way: the short-circuit protection electromagnetic tripping device comprises a live wire input connecting component, a thermal tripping component, a connecting wire, a live wire moving contact, a live wire static contact, a short-circuit protection electromagnetic tripping solenoid coil and a live wire output connecting component which are electrically connected in sequence; the other switch channel of the zero line is as follows: the zero line input connecting wire assembly, the zero line moving contact, the zero line static contact and the zero line output connecting sheet are connected in sequence; the live wire input connecting line assembly and the zero line input connecting line assembly penetrate through the zero sequence transformer in parallel; the DPN residual current circuit breaker further comprises an electronic control circuit board, and the zero sequence transformer and the electronic control electromagnetic tripping solenoid coil are electrically connected with the electronic control circuit board respectively.
Furthermore, the DPN residual current circuit breaker also comprises a live wire arc extinguishing device and a zero line arc extinguishing device, wherein the live wire arc extinguishing device internally comprises an arc extinguishing chamber, a live wire arc guide plate and a live wire arc extinguishing piece; the zero line arc extinguishing device comprises a zero line arc guide plate, a zero line arc extinguishing piece and an air guide plate.
Furthermore, the DPN residual-current circuit breaker further comprises a handle switching mechanism and a tripping mechanism, wherein the zero line moving contact and the handle switching mechanism are of a split structure, and are of an asymmetric structure with the live line moving contact.
Furthermore, the inner hole of the static iron core is two concentric through holes with different diameters, the pressure spring is placed in the through hole at one end with a larger diameter, and the firing pin penetrates through the through hole at the other end with a smaller diameter and is in sliding fit with the through hole.
Furthermore, the left side of the movable iron core is provided with a protrusion, and the protrusion penetrates through the inner hole of the inner coil framework and abuts against the shell of the circuit breaker.
According to the utility model provides a concrete embodiment, the utility model provides a DPN electric leakage circuit breaker with combined type electromagnetism tripping device has following technological effect: the composite electromagnetic tripping mechanism is additionally arranged in the DPN electric leakage circuit breaker structure, and an external electric leakage protection accessory is not needed, so that the whole thickness dimension of the DPN electric leakage circuit breaker is recovered to two moduli (18 mm), namely, the thickness dimension of the DPN electric leakage circuit breaker with the thickness of 18 mm is not changed, and an electric leakage protection function is also endowed; the combined type electromagnetic tripping mechanism combines an additional electronic control electromagnetic tripping solenoid coil and a short-circuit protection electromagnetic tripping solenoid coil of a traditional circuit breaker in a sleeving mode, so that the complex intelligent tripping mechanism becomes simple and convenient, the material consumption is reduced, and the space of a distribution box is saved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic structural view of a combined electromagnetic trip mechanism provided by the present invention;
fig. 2 is a schematic view of a split structure of the combined electromagnetic tripping mechanism provided by the present invention;
fig. 3 is a schematic view of an internal structure of the combined electromagnetic tripping mechanism provided by the present invention;
fig. 4 is a schematic front structural diagram of a DPN residual current circuit breaker with a composite electromagnetic tripping mechanism according to an embodiment of the present invention;
fig. 5 is a schematic diagram of a back side structure of a DPN residual-current circuit breaker with a composite electromagnetic tripping mechanism according to an embodiment of the present invention;
reference numerals: A. a second electromagnetic trip solenoid coil; B. an outer coil frame; C. a first electromagnetic trip solenoid coil; D. an inner coil bobbin; E. a movable iron core; F. a stationary iron core; G. a pressure spring; H. a striker; I. a magnetic support; J. static contact; K. a DPN residual current circuit breaker;
k1, a live wire input connecting assembly; k2, a zero sequence transformer; k3, thermal trip assembly and wiring; k4, live wire moving contact; k5, a live wire output connection component; k6, a zero line input connecting component; k7, a zero line moving contact; k8, a zero line static contact and a zero line output connecting sheet; k9, a handle switching brake mechanism; k10-trip mechanism; k11, a live wire arc extinguishing device (the interior of the device contains an arc extinguishing chamber K11-1, a live wire arc guide plate K11-2 and a live wire arc extinguishing piece K11-3); k12, a zero line arc extinguishing device (comprising a zero line arc guide plate K12-1, a zero line arc extinguishing piece K12-2 and an air guide plate K12-3); k13, electric leakage testing mechanism; k14, electronic control circuit board.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a DPN electric leakage circuit breaker with combined type electromagnetism tripping device installs combined type electromagnetism tripping device additional inside DPN electric leakage circuit breaker structure, does not change 18 millimeters DPN circuit breaker thickness dimension, has still given the earth leakage protection function, has reduced DPN electric leakage circuit breaker's equipment volume.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 5, the utility model provides a pair of DPN leakage current breaker with combined type electromagnetic tripping mechanism, DPN leakage current breaker K internally mounted traditional short-circuit protection magnetic trip coil's position installation combined type electromagnetic tripping mechanism, combined type electromagnetic tripping mechanism includes magnetic support I and installs the combined type electromagnetic tripping solenoid coil assembly on magnetic support I, combined type electromagnetic tripping solenoid coil assembly includes interior coil skeleton D, first electromagnetic tripping solenoid coil C, outer coil skeleton B and the second electromagnetic tripping solenoid coil a that overlap from inside to outside in proper order, first electromagnetic tripping solenoid coil C is around establishing on interior coil skeleton D, outer coil skeleton B is insulation system, two coils a and C are separated by outer coil skeleton B and are insulated; the second electromagnetic tripping solenoid coil A is sleeved outside the first electromagnetic tripping solenoid coil C and wound on the outer coil framework B; the first electromagnetic tripping solenoid coil C is an electronic control electromagnetic tripping solenoid coil, and the second electromagnetic tripping solenoid coil A is a short-circuit protection electromagnetic tripping solenoid coil; or, the first electromagnetic trip solenoid coil C is a short-circuit protection electromagnetic trip solenoid coil, and the second electromagnetic trip solenoid coil a is an electronic control electromagnetic trip solenoid coil; coil A with coil C can inside and outside mutual replacement, can not be right the utility model discloses a function production influences.
An inner hole of the inner coil framework D is sequentially provided with a movable iron core E, a firing pin H, a pressure spring G and a static iron core F, the movable iron core E is tightly matched and fixedly installed with the firing pin H, and the pressure spring G is sleeved on the outer side of the firing pin H and arranged between the movable iron core E and the static iron core F; the striker H penetrates through an inner hole of the static iron core F and forms sliding fit with the inner hole of the static iron core F; the static iron core F is fixedly arranged at the right end of the inner hole of the inner coil framework D in a tight fit manner; the magnetic support I, the movable iron core E and the static iron core F form a closed magnetic circuit; the magnetic closed magnetic loop has the function of driving a firing pin H to trigger a tripping mechanism K10 of the DPN leakage circuit breaker K by utilizing the attraction motion of the movable iron core E to the static iron core F, and the impact tripping function is shared by the traditional short-circuit protection tripping and the leakage protection tripping.
As shown in fig. 4 to 5, the internal mechanisms and components of the DPN residual-current circuit breaker include: the device comprises a live wire input connecting component K1, a zero sequence transformer K2, a thermal tripping component and a connecting wire K3, a live wire moving contact K4, a live wire output connecting component K5, a zero wire input connecting component K6, a zero wire moving contact K7, a zero wire static contact and a zero wire output connecting sheet K8, a handle switching mechanism K9 of the live wire and zero wire moving contacts, a tripping mechanism K10, a live wire arc extinguishing device K11 (which internally comprises an arc extinguishing chamber K11-1, a live wire arc conducting plate K11-2, a live wire arc extinguishing plate K11-3), a zero wire arc extinguishing device K12 (which comprises a zero wire arc conducting plate K12-1, a zero wire arc extinguishing plate K12-2 and an air conducting plate K12-3), a leakage testing mechanism K13 and an electronic control circuit board 539K 14.
DPN residual current circuit breaker K includes two way switch channel of live wire and zero line, and wherein the switch channel of live wire is all the way: the device comprises a live wire input connecting component K1, a thermal tripping component and a connecting wire K3, a live wire moving contact K4, a live wire static contact J, a short-circuit protection electromagnetic tripping solenoid coil and a live wire output connecting component K5 which are electrically connected in sequence; the other switch channel of the zero line is as follows: the zero line input connecting wire component K6, the zero line moving contact K7, the zero line static contact and the zero line output connecting sheet K8 are connected in sequence; the live wire input connecting line component K1 and the zero wire input connecting line component K6 penetrate through the zero sequence transformer K2 in parallel; the DPN residual current circuit breaker K further comprises an electronic control circuit board K14, and the zero sequence transformer K2 and the electronic control electromagnetic tripping solenoid coil are electrically connected with the electronic control circuit board K14 respectively.
The DPN residual current circuit breaker K further comprises a live wire arc extinguishing device K11 and a zero line arc extinguishing device K12, wherein the live wire arc extinguishing device K11 internally comprises an arc extinguishing chamber K11-1, a live wire arc guide plate K11-2 and a live wire arc extinguishing piece K11-3; the zero line arc extinguishing device K12 comprises a zero line arc guide plate K12-1, a zero line arc extinguishing piece K12-2 and an air guide plate K12-3. A live wire arc extinguishing piece K11-3 is added in the live wire arc extinguishing mechanism K11; the zero line arc extinguishing device K12 is additionally provided with a zero line arc extinguishing piece K12-2 and an air guide plate K12-3. The additional components of the arc extinguishing mechanism aim to overcome the defect that the DPN type circuit breaker sacrifices the arc extinguishing capability in pursuit of volume reduction.
The DPN electric leakage circuit breaker K further comprises a handle switching-on and switching-off mechanism K9 and a tripping mechanism K10, and the fact that a live wire and a zero wire are jointly arranged in the same circuit breaker shell is characterized by a DPN type circuit breaker, therefore, the live wire and the zero wire need to be separated by a partition plate, and the zero wire moving contact K7 and the handle switching-on and switching-off mechanism K9 are of a split structure, so that layered assembly is facilitated. Meanwhile, the zero line moving contact K7 and the live line moving contact K4 are in asymmetric structures, so that the zero line is conveniently disconnected after being switched on.
The inner hole of the static iron core F is two concentric through holes with different diameters, the pressure spring G is placed in the through hole at one end with the larger diameter, and the firing pin H penetrates through the through hole at the other end with the smaller diameter and is in sliding fit with the through hole at the other end.
The left side of the movable iron core E is provided with a protrusion, and the protrusion penetrates through an inner hole of the inner coil framework D and abuts against the shell of the circuit breaker.
Because the 18 mm width space of the DPN circuit breaker must accommodate two sets of switch channels of live wire and zero wire, whether the above scheme is feasible or not needs theoretical data support, and the calculation result is as follows:
the maximum rated current specification of the DPN circuit breaker is set to be 40 amperes, then the C-type short circuit 100 milliseconds is regulated according to the electrical industry compulsorily, the non-action rated current is 5 times of the rated current, namely 200 amperes, the maximum number of turns is 5 turns, the number of ampere turns is 1000, the resistance formed by the pressure of a movable iron core E and a pressure spring is guaranteed to be more than or equal to 1000 ampere turns, otherwise, the circuit breaker has the risk of tripping and tripping the brake off more than grade; in the aspect of weak current, according to the standard specification of the residual current circuit breaker, when the working voltage is reduced to 50 volts, the movable iron core E must overcome the thrust of the compression spring G to push the striker H to trip. According to the geometric dimensions, the leakage protector can be wound by 1440 turns of enameled wires with the diameter of 0.16 wire, the total length of the enameled wires is about 40 meters, the resistance is about 64 ohms, the current corresponding to 50 volts is about 0.78 ampere, the ampere turn is 1440X0.78 which is 1125, which is larger than 1000 ampere turns of strong current, and the embodiment can meet the industry standard of the leakage protector which does not act current in the electrical industry and acts with weak current. Therefore, this embodiment is theoretically proven to be feasible.
The composite electromagnetic tripping mechanism is additionally arranged in the DPN electric leakage circuit breaker structure, and an external electric leakage protection accessory is not needed, so that the whole thickness dimension of the DPN electric leakage circuit breaker is recovered to two moduli (18 mm), namely, the thickness dimension of the DPN electric leakage circuit breaker with the thickness of 18 mm is not changed, and an electric leakage protection function is also endowed; the combined type electromagnetic tripping mechanism combines an additional electronic control electromagnetic tripping solenoid coil and a short-circuit protection electromagnetic tripping solenoid coil of a traditional circuit breaker in a sleeving mode, so that the complex intelligent tripping mechanism becomes simple and convenient, the material consumption is reduced, and the space of a distribution box is saved.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (5)
1. A DPN electric leakage circuit breaker with a composite electromagnetic tripping mechanism is characterized in that the DPN electric leakage circuit breaker (K) is internally provided with the composite electromagnetic tripping mechanism installed at the position of a traditional short-circuit protection magnetic tripping coil, the composite electromagnetic tripping mechanism comprises a magnetic support (I) and a composite electromagnetic tripping solenoid coil assembly installed on the magnetic support (I), the composite electromagnetic tripping solenoid coil assembly comprises an inner coil framework (D), a first electromagnetic tripping solenoid coil (C), an outer coil framework (B) and a second electromagnetic tripping solenoid coil (A) which are sequentially sleeved from inside to outside, the first electromagnetic tripping solenoid coil (C) is wound on the inner coil framework (D), the outer coil framework (B) is of an insulating structure and is sleeved outside the first electromagnetic tripping solenoid coil (C), the second electromagnetic tripping solenoid coil (A) is wound on the outer coil framework (B); the first electromagnetic tripping solenoid coil (C) is an electronic control electromagnetic tripping solenoid coil, and the second electromagnetic tripping solenoid coil (A) is a short-circuit protection electromagnetic tripping solenoid coil; or the first electromagnetic tripping solenoid coil (C) is a short-circuit protection electromagnetic tripping solenoid coil, and the second electromagnetic tripping solenoid coil (A) is an electronic control electromagnetic tripping solenoid coil;
an inner hole of the inner coil framework (D) is sequentially provided with a movable iron core (E), a firing pin (H), a pressure spring (G) and a static iron core (F), the movable iron core (E) and the firing pin (H) are fixedly installed together in a tight fit mode, and the pressure spring (G) is sleeved on the outer side of the firing pin (H) and arranged between the movable iron core (E) and the static iron core (F); the firing pin (H) penetrates through an inner hole of the static iron core (F) and forms sliding fit with the inner hole of the static iron core (F); the static iron core (F) is fixedly arranged at the right end of an inner hole of the inner coil framework (D) in a tight fit manner; the magnetic support (I), the movable iron core (E) and the static iron core (F) form a closed magnetic circuit;
DPN leakage circuit breaker (K) includes live wire and two way switch channel of zero line, and wherein the switch channel of live wire one way is: the device comprises a live wire input connecting component (K1), a thermal tripping component and a connecting wire (K3), a live wire moving contact (K4), a live wire static contact (J), a short-circuit protection electromagnetic tripping solenoid coil and a live wire output connecting component (K5) which are electrically connected in sequence; the other switch channel of the zero line is as follows: the zero line input connecting wire assembly (K6), the zero line moving contact (K7), the zero line static contact and the zero line output connecting wire (K8) are connected in sequence; wherein the live wire input connecting line assembly (K1) and the zero wire input connecting line assembly (K6) penetrate through a zero sequence transformer (K2) in parallel; the DPN residual current circuit breaker (K) further comprises an electronic control circuit board (K14), and the zero sequence transformer (K2) and the electronic control electromagnetic tripping solenoid coil are electrically connected with the electronic control circuit board (K14) respectively.
2. The DPN residual current circuit breaker with the combined type electromagnetic tripping mechanism according to claim 1, wherein the DPN residual current circuit breaker (K) further comprises a live line arc extinguishing device (K11) and a zero line arc extinguishing device (K12), and the live line arc extinguishing device (K11) internally comprises an arc extinguishing chamber (K11-1), a live line arc guide plate (K11-2) and a live line arc extinguishing piece (K11-3); the zero line arc extinguishing device (K12) comprises a zero line arc guide plate (K12-1), a zero line arc extinguishing piece (K12-2) and an air guide plate (K12-3).
3. The DPN residual current circuit breaker with combined electromagnetic trip mechanism according to claim 1, characterized in that the DPN residual current circuit breaker (K) further comprises a handle switching mechanism (K9) and a trip mechanism (K10), and the neutral moving contact (K7) and the handle switching mechanism (K9) are of a separate structure and are of an asymmetric structure with respect to the live moving contact (K4).
4. The DPN residual-current circuit breaker with the combined type electromagnetic trip mechanism according to claim 1, wherein the inner hole of the static iron core (F) is two concentric through holes with different diameters, the through hole at one end with a larger diameter is used for placing the compression spring (G), and the through hole at the other end with a smaller diameter is used for the striker (H) to penetrate and slide.
5. The DPN residual current circuit breaker with the combined type electromagnetic trip mechanism according to claim 1, wherein a protrusion is disposed on a left side of the movable iron core (E), and the protrusion penetrates through an inner hole of the inner coil bobbin (D) and abuts against a circuit breaker housing.
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| CN202121733876.9U CN215266154U (en) | 2021-07-28 | 2021-07-28 | DPN electric leakage circuit breaker with combined type electromagnetism tripping device |
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| CN202121733876.9U CN215266154U (en) | 2021-07-28 | 2021-07-28 | DPN electric leakage circuit breaker with combined type electromagnetism tripping device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115172115A (en) * | 2022-08-26 | 2022-10-11 | 天津加美特电气股份有限公司 | Non-mechanical on-off contact type circuit breaker |
| CN115172116A (en) * | 2022-08-26 | 2022-10-11 | 天津加美特电气股份有限公司 | Non-mechanical opening and closing electronic leakage circuit breaker |
| CN115206743A (en) * | 2022-08-26 | 2022-10-18 | 天津加美特电气股份有限公司 | Electromagnetic leakage circuit breaker adopting leakage current relay to replace EMR |
| CN116705567A (en) * | 2023-08-07 | 2023-09-05 | 森萨塔科技（常州）有限公司 | Leakage protection device and electrical equipment |
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2021
- 2021-07-28 CN CN202121733876.9U patent/CN215266154U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115172115A (en) * | 2022-08-26 | 2022-10-11 | 天津加美特电气股份有限公司 | Non-mechanical on-off contact type circuit breaker |
| CN115172116A (en) * | 2022-08-26 | 2022-10-11 | 天津加美特电气股份有限公司 | Non-mechanical opening and closing electronic leakage circuit breaker |
| CN115206743A (en) * | 2022-08-26 | 2022-10-18 | 天津加美特电气股份有限公司 | Electromagnetic leakage circuit breaker adopting leakage current relay to replace EMR |
| CN115172115B (en) * | 2022-08-26 | 2024-03-12 | 天津加美特电气股份有限公司 | Non-mechanical switching contact type breaker |
| CN115206743B (en) * | 2022-08-26 | 2024-03-22 | 天津加美特电气股份有限公司 | Electromagnetic leakage circuit breaker adopting leakage current relay to replace EMR |
| CN115172116B (en) * | 2022-08-26 | 2024-03-22 | 天津加美特电气股份有限公司 | Non-mechanical switching-on and switching-off electronic leakage breaker |
| CN116705567A (en) * | 2023-08-07 | 2023-09-05 | 森萨塔科技（常州）有限公司 | Leakage protection device and electrical equipment |
| CN116705567B (en) * | 2023-08-07 | 2023-10-24 | 森萨塔科技（常州）有限公司 | Leakage protection device and electrical equipment |
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