CN-122000248-A - Circuit breaker

CN122000248ACN 122000248 ACN122000248 ACN 122000248ACN-122000248-A

Abstract

The invention provides a circuit breaker, which at least comprises an insulating shell and elements arranged in the insulating shell, wherein the insulating shell is formed by combining a middle seat, a base and a cover, the middle seat and the base form a shell of an L-pole module, the middle seat and the cover form a shell of an N-pole module, residual current controllers are arranged on the left sides of the L-pole module and the N-pole module, an arc extinguishing chamber is arranged at the lower part of the insulating shell, a moving contact device, a fixed contact and a magnetic tripping unit are arranged above the arc extinguishing chamber, residual current protection trips are arranged between the magnetic tripping unit and an operating mechanism, the rotation centers of the magnetic tripping unit, the residual current protection trips and the moving contact unit are distributed in a triangular mode, and the N-pole moving contact is arranged in front of or behind the moving contact unit along the Z-axis direction in an insulating mode and is in linkage with the moving contact unit.

Inventors

WU ZHIYONG
ZENG WEI
NAN YIN
LIU ZHONG
LIN ZHIQING
HUANG ZHUGEN

Assignees

浙江瑞坦数字能源有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (14)

1. A circuit breaker at least comprises an insulating housing and a component arranged in the insulating housing, The insulating shell is formed by combining at least a middle seat, a base and a cover, the elements comprise an L pole module, an N pole module and a residual current controller, The middle seat and the base form a shell of an L pole module, the middle seat and the cover form a shell of an N pole module, the left sides of the L pole module and the N pole module are provided with the residual current controller, The L pole module at least comprises a handle, an operating mechanism, a contact indicator, a tripping mechanism, a magnetic tripping unit, a fixed contact, a thermal tripping unit, a moving contact unit and an arc extinguishing chamber; the N pole module at least comprises an N pole moving contact and an N pole static contact, The residual current controller at least comprises a residual current detection unit, a residual current protection release, a test button or/and a reset button, The novel high-voltage power supply is characterized in that wiring terminals are respectively arranged at two end sides of the insulating shell, N metal arc extinguishing grid plates are arranged in the arc extinguishing chamber, the metal arc extinguishing grid plates are sequentially arranged in an air insulating mode in the X-axis direction between the wiring terminals at the two end, the arc extinguishing chamber is arranged at the lower part of the insulating shell, the moving contact device, the fixed contact and the magnetic tripping unit are arranged above the arc extinguishing chamber, the residual current protection tripper is arranged between the magnetic tripping unit and the operating mechanism, the rotation centers of the magnetic tripping unit, the residual current protection tripper and the moving contact unit are distributed in a triangular mode, and the N moving contact is arranged in front of or behind the moving contact unit in the Z-axis direction in an insulating mode and is in linkage with the moving contact unit.
2. The circuit breaker according to claim 1, wherein the residual current controller further comprises a controller unit and a power taking unit, the power taking unit supplies power to the controller unit, the controller unit is electrically connected with the residual current protection tripping device, the residual current detection unit detects residual current and feeds back the residual current to the controller unit, the controller unit outputs an action signal to the residual current protection tripping device, and the residual current protection tripping device drives the tripping mechanism to enable the circuit breaker to be turned off so as to achieve residual current protection.
3. The circuit breaker according to claim 1, wherein the output end of the residual current detecting unit is electrically connected with a residual current protection release, the residual current protection release is a magnetic flux release, the residual current detecting unit directly outputs the residual current to the residual current protection release after detecting the residual current, and the residual current protection release drives a release mechanism to switch off the circuit breaker to realize residual current protection.
4. The circuit breaker according to claim 1, wherein the middle base and the base cooperate to form a first cavity and a second cavity, the middle base and the cover cooperate to form a third cavity, the residual current controller is disposed in the first cavity, the L-pole unit is disposed in the second cavity, and the N-pole unit is disposed in the third cavity.
5. The circuit breaker according to claim 2, wherein the residual current detection unit comprises at least a zero sequence transformer, a first through conductor and a second through conductor, the output end of the zero sequence transformer is electrically connected with the controller unit, one end of the first through conductor is electrically connected with the fixed contact or the moving contact unit, one end of the second through conductor is electrically connected with the N-pole fixed contact or the N-pole moving contact, and the first through conductor and the second through conductor are respectively electrically connected with corresponding wiring terminals after passing through the zero sequence transformer at the same time.
6. The circuit breaker according to claim 1, wherein the residual current protection release comprises at least a coil winding, a stationary core, a moving core, and a core spring, wherein bosses extend from both ends of the moving core, and the boss follower core linearly reciprocates in the coil winding.
7. The circuit breaker according to claim 6, wherein a hook is provided at one end of the reset button, the hook is hung on a boss on the left side of the moving core, and is interlocked with the boss through a spring, when the residual current protection release is operated, the moving core moves to the right side, the boss on the left side of the moving core moves into the coil winding, the reset button is driven by the spring force to pop out toward the insulating housing, one side of the hook is propped against the moving core and can not be reset, and the reset button is pressed to reset.
8. The circuit breaker according to claim 2, wherein the power taking unit at least comprises an L-pole power taking element and an N-pole power taking element, the L-pole power taking element is an elastic conductor, the L-pole power taking element is laid in the base and penetrates from the first cavity to the second cavity, the N-pole power taking unit is an elastic conductor, a flexible conductor or a hard conductor, and the N-pole power taking element is laid in the middle base and penetrates from the first cavity to the third cavity.
9. The circuit breaker of claim 8, wherein the controller unit has at least two metal tubular rivets welded thereto for power extraction.
10. The circuit breaker according to claim 9, wherein the L-pole power taking element and the N-pole power taking element are elastic conductors, one ends of the L-pole power taking element and the N-pole power taking element are provided with bending protrusions or arc structures, the L-pole power taking element and the N-pole power taking element are respectively inserted into the metal tubular rivets, the other ends of the L-pole power taking element and the N-pole power taking element are arranged on the moving track of the moving contact unit, the other ends of the N-pole power taking element and the N-pole power taking element are arranged on the moving track of the N-pole moving contact, and the moving contact unit and the N-pole moving contact are electrically contacted with the fixed contact and the N-pole fixed contact when the closing motion is about to contact with the fixed contact and the N-pole fixed contact.
11. The circuit breaker according to claim 1, wherein one side of the test button is provided with a back-off, the test button is inserted from outside to inside of the base while being installed into the insulating housing against the elastic force of the back-off, a pressing direction of the test button is provided with a resistor and a compression spring, one end of the resistor is directly or indirectly electrically connected with the N pole module, the other end of the resistor is electrically connected with the compression spring, the other end of the compression spring is abutted against the test button while being provided with a conductive extension part, and the conductive extension part is electrically contacted with the L pole electricity taking element when the test button is pressed.
12. The circuit breaker according to claim 5, wherein two connection terminals on each side are respectively arranged in a first groove between the base and the middle base and a second groove between the middle base and the cover, the connection terminals arranged in the first groove and the connection terminals arranged in the second groove are arranged in a vertically staggered mode along the Y-axis direction, a mounting boss is arranged behind the first groove and is used for preassembling the connection terminals electrically connected with the second through conductors, the mounting boss is in an upright state during preassembling, the middle base is buckled with the base, and the connection terminals electrically connected with the second through conductors penetrate through holes in the middle base and can be turned 90 degrees to enter the second groove.
13. The circuit breaker of claim 12, wherein the terminal comprises a terminal block, a terminal block and a terminal screw, the terminal block is sleeved on the terminal block and rotatably disposed relative to the terminal block, and the terminal screw is inserted into the terminal block.
14. The circuit breaker according to claim 5, wherein the controller unit drives the tripping mechanism to turn off the circuit breaker through the residual current protection tripper to realize the leakage protection according to the fact that the residual current detection unit detects that the current vector sum between the first and second through conductors is not zero and reaches a certain threshold value.

Description

Circuit breaker Technical Field The invention relates to the field of piezoelectric devices, in particular to a circuit breaker. Background At present, the circuit breaker is various, especially the circuit breaker with residual current protection function, the overall layout is more complicated, the structure is not compact enough, the residual current detection circuit, the residual current protection release and the residual current testing circuit are mutually connected by adopting wires, the internal wiring of the circuit breaker is complicated, the layout position of internal elements is unreasonable, the utilization rate of the internal space is low, the overall performance stability of the circuit breaker is affected, meanwhile, the assembly site is also required to be subjected to procedures such as welding and riveting, the assembly is complicated, the assembly efficiency is low, the product modularization and the industrial automatic production are also not facilitated, in addition, the mode of integrally combining the residual current protection release and the magnetic release of the circuit breaker has great influence on the reliability and the instantaneity of residual current action, in addition, a reset button is not indicated by the residual current action, the safety and the reliability of the residual current protection circuit breaker are affected, and the short-circuit breaking capacity of the circuit breaker is poor due to unreasonable layout of an arc-extinguishing chamber. Disclosure of Invention Based on the background, the circuit breaker provided by the invention has the advantages of simple structure, modularized structure, high assembly automation degree, safety, reliability and stable performance. The invention provides a circuit breaker, which at least comprises an insulating shell and an element arranged in the insulating shell, wherein the insulating shell is formed by combining a middle seat, a base and a cover, the element comprises an L-pole module, an N-pole module and a residual current controller, the middle seat and the base form the shell of the L-pole module, the middle seat and the cover form the shell of the N-pole module, the residual current controller is arranged on the left sides of the L-pole module and the N-pole module, and the L-pole module at least comprises a handle, an operating mechanism, a contact indicator, a tripping mechanism, a magnetic tripping unit, a fixed contact, a thermal tripping unit, a moving contact unit and an arc extinguishing chamber; the N pole module at least comprises an N pole moving contact and an N pole static contact, the residual current controller at least comprises a residual current detection unit, a residual current protection release, a test button or/and a reset button, two end sides of the insulating shell are respectively provided with a wiring terminal, the residual current detection unit, a magnetic tripping unit, the static contact and an arc extinguish chamber are arranged between the wiring terminals at the two end sides, the arc extinguish chamber is provided with N metal arc extinguish gate sheets, the metal arc extinguish gate sheets are sequentially arranged in an air insulating manner in the X axis direction between the wiring terminals at the two end, the upper part of the insulating shell is provided with an operating mechanism, the lower part of the insulating shell is provided with the arc extinguish chamber, the upper part of the arc extinguish chamber is provided with a moving contact device, a static contact and a magnetic tripping unit, the residual current protection release is arranged between the magnetic tripping unit and the operating mechanism, the rotation centers of the magnetic tripping unit, the residual current protection release and the moving contact unit are distributed in a triangular manner, the N-pole movable contact is arranged in front of or behind the movable contact unit along the Z-axis direction in an insulating manner and is in linkage with the movable contact unit. In this way, the insulating shell is overlapped and combined by the base, the middle seat and the cover, the internal element of the circuit breaker is divided into three modules which are respectively arranged in respective areas in the insulating shell, the L-pole module is arranged in a cavity formed between the middle seat and the base, the N-pole module is arranged in a cavity formed between the middle seat and the cover, the left sides of the N-pole module and the L-pole module are provided with residual current controllers, the N-pole module and the L-pole module are overlapped, the N-pole moving contact is arranged in front of or behind the Z-axis direction of the moving contact in an insulating manner and is in linkage with the moving contact unit, the N-pole moving contact is arranged in front of or behind the Z-axis direction of the moving contact in an insulating manner to realize switching on and off,