CN-224204072-U - Anti-tripping circuit of circuit breaker and circuit breaker comprising same

CN224204072UCN 224204072 UCN224204072 UCN 224204072UCN-224204072-U

Abstract

The present utility model relates to an anti-trip circuit for a circuit breaker and a circuit breaker including the same. The anti-trip circuit for a circuit breaker includes a first input terminal and a second input terminal configured to receive a voltage input, a non-electronic closing coil connected between the first input terminal and the second input terminal and configured to control opening and closing of the circuit breaker, a voltage dividing resistor connected in series with the non-electronic closing coil, and a circuit converting unit connected between the first input terminal and the second input terminal and configured to control whether the voltage dividing resistor is bypassed. Therefore, according to the embodiment of the utility model, in the anti-trip mode, the non-electronic closing coil can enter the low-voltage holding state and can be energized for a long time, and meanwhile, the non-electronic closing coil is ensured not to be burnt out.

Inventors

LIN CHANGQING
WU BINGCHANG
GUO QISHUN
TU ZHANWEI
KE XIAOBIN

Assignees

施耐德电气(厦门)开关设备有限公司

Dates

Publication Date: 20260505
Application Date: 20250509

Claims (10)

1. An anti-skip circuit for a circuit breaker, comprising: A first input terminal and a second input terminal configured to receive a voltage input; A non-electronic closing coil connected between the first input terminal and the second input terminal and configured to control opening and closing of the circuit breaker; A voltage dividing resistor connected in series with the non-electronic switching coil, and And a circuit switching unit connected between the first input terminal and the second input terminal and configured to control whether the voltage dividing resistor is bypassed.
2. The anti-skip circuit of claim 1, wherein the circuit switching unit comprises: A first circuit switching auxiliary contact connected between the first input terminal and the relay; a second circuit switching auxiliary contact connected in parallel with the voltage dividing resistor; And a relay connected in series with the first circuit switching auxiliary contact, connected to the second input terminal, and configured to control closing and opening of the first circuit switching auxiliary contact and the second circuit switching auxiliary contact.
3. The anti-skip circuit of claim 2, further comprising: a first energy storage state contact connected between the first input terminal and the non-electronic switch-on coil, and And the second energy storage state contact is connected between the first energy storage state contact and the relay.
4. The anti-trip circuit of claim 3, wherein the first input terminal and the second input terminal are provided with voltage inputs when the circuit breaker receives a closing command, When the circuit breaker completes storing energy, the first energy storing state contact is closed, and after a predetermined period of time, the second energy storing state contact is opened.
5. The anti-skip circuit of claim 4 wherein the first energy storage state contact is closed and the second energy storage state contact is closed during a predetermined period of time, the relay being energized.
6. The anti-bounce circuit of claim 5 wherein the relay controls the first circuit switching auxiliary contact to close, and The relay controls the second circuit to switch the auxiliary contact off so as to connect the voltage dividing resistor in series with the non-electronic closing coil.
7. The anti-trip circuit of claim 6, further comprising a switch-on and switch-off state auxiliary switch connected in series between the first energy storage state contact and the non-electronic switch-on coil and configured to open when the circuit breaker completes switching on and to close when the circuit breaker completes switching off.
8. The anti-skip circuit of claim 6 wherein the first energy storage state contact is a normally open contact, the second energy storage state contact is a normally closed contact, the first circuit switching auxiliary contact is a normally open contact, and the second circuit switching auxiliary contact is a normally closed contact.
9. The anti-trip circuit of claim 8, wherein the first energy storage state contact is reset to a normally open state and the second energy storage state contact is reset to a normally closed state when the circuit breaker completes closing.
10. A circuit breaker comprising an anti-bouncing circuit according to any one of claims 1 to 9.

Description

Anti-tripping circuit of circuit breaker and circuit breaker comprising same Technical Field The present utility model relates to the field of electric power products, and more particularly, to an anti-trip circuit for a circuit breaker and a circuit breaker including the same. Background Currently, the switching-on and switching-off function of a circuit breaker is realized by a switching-on and switching-off device (such as a button) or by triggering a trip coil through an electric switching-on and switching-off signal. It is a very common requirement that circuit breakers achieve anti-bouncing. The "trip prevention" of the circuit breaker means that a mechanical locking device or an electrical locking device is utilized, so that a closing command can only operate the circuit breaker to close once no matter how long it lasts. If the circuit breaker is to be closed a second time, the closing command must be resent after the previous closing command has disappeared. Common anti-bounce functions are electrical anti-bounce and mechanical anti-bounce. The electric anti-jump scheme is mature. In the case of mechanical anti-bouncing, however, it is a challenge to achieve reliable mechanical anti-bouncing in the case of circuit breakers equipped with non-electronic coils, since the non-electronic coils are generally not energized for a long period of time. Thus, there is a need for a reliable mechanical anti-bounce solution that can protect non-electronic coils. Disclosure of utility model The utility model relates to an anti-tripping circuit for a circuit breaker, which is characterized by comprising a first input terminal and a second input terminal, a non-electronic switching-on coil, a voltage dividing resistor and a circuit switching unit, wherein the first input terminal and the second input terminal are configured to receive voltage input, the non-electronic switching-on coil is connected between the first input terminal and the second input terminal and is configured to control switching-on and switching-off of the circuit breaker, the voltage dividing resistor is connected in series with the non-electronic switching-on coil, and the circuit switching unit is connected between the first input terminal and the second input terminal and is configured to control whether the voltage dividing resistor is bypassed. In one example, the circuit switching unit includes a first circuit switching auxiliary contact connected between the first input terminal and the relay, a second circuit switching auxiliary contact connected in parallel with the voltage dividing resistor, and a relay connected in series with the first circuit switching auxiliary contact and connected to the second input terminal and configured to control the closing and opening of the first circuit switching auxiliary contact and the second circuit switching auxiliary contact. In one example, the anti-bounce circuit further includes a first energy storage state contact connected between the first input terminal and the non-electronic closing coil, and a second energy storage state contact connected between the first energy storage state contact and the relay. In one example, the first input terminal and the second input terminal are provided with voltage inputs when the circuit breaker receives a closing command, the first energy storage state contact is closed when the circuit breaker completes energy storage, and the second energy storage state contact is opened after a predetermined period of time. In one example, during a predetermined period of time, the first energy storage state contact is closed and the second energy storage state contact is closed, the relay is energized. In one example, the relay controls the first circuit switching auxiliary contact to close and the relay controls the second circuit switching auxiliary contact to open to connect the voltage dividing resistor in series with the non-electronic closing coil. In one example, the anti-trip circuit further includes a switch-on and switch-off state auxiliary switch connected in series between the first energy storage state contact and the non-electronic switch-on coil and configured to open when the circuit breaker completes switching-on and to close when the circuit breaker completes switching-off. In one example, the first energy storage state contact is a normally open contact, the second energy storage state contact is a normally closed contact, the first circuit switching auxiliary contact is a normally open contact, and the second circuit switching auxiliary contact is a normally closed contact. In one example, when the circuit breaker completes closing, the first energy storage state contact is reset to a normally open state and the second energy storage state contact is reset to a normally closed state. The utility model also relates to a circuit breaker, which is characterized by comprising the anti-jump circuit. Therefore, according to the embodiment of the utility mod