CN-224204076-U - Tripping mechanism and switch equipment

CN224204076UCN 224204076 UCN224204076 UCN 224204076UCN-224204076-U

Abstract

Embodiments of the present disclosure provide a trip mechanism and a switching device. The trip mechanism includes a trip energy supply circuit, a first voltage comparison circuit, a voltage detection circuit, and a determination unit. The trip energy supply circuit includes a solenoid and a storage capacitor. The storage capacitor is coupled to the first end of the electromagnetic coil. A first voltage comparison circuit is coupled to the storage capacitor at a first end of the solenoid and is configured to compare a voltage of the storage capacitor to an energy threshold required for trip. The voltage detection circuit is coupled to the second terminal of the electromagnetic coil and is configured to detect a voltage at the second terminal of the electromagnetic coil. The determining unit is coupled with the first voltage comparing circuit and the voltage detecting circuit and is used for determining whether the electromagnetic coil is broken or not based on the voltage of the second end of the electromagnetic coil when the voltage of the energy storage capacitor reaches an energy threshold required for tripping. The tripping mechanism of the embodiment of the disclosure can diagnose whether the electromagnetic coil is broken or not by a simple circuit structure.

Inventors

LU XIANGDONG
CHENG YING
LIANG YUHUA
RUAN XIAOBO
WANG MENGYAO
ZHAO NA
PENG TAO
WU WEI

Assignees

施耐德电气工业公司

Dates

Publication Date: 20260505
Application Date: 20250528

Claims (8)

1. A trip mechanism, comprising: trip energy supply circuit (10), comprising: An electromagnetic coil (11) including a first end and a second end, and -An energy storage capacitor (12) coupled to a first end of the electromagnetic coil (11); A first voltage comparison circuit (20) coupled with the energy storage capacitor (12) at a first end of the electromagnetic coil (11) and for comparing the voltage of the energy storage capacitor (12) with an energy threshold required for tripping; a voltage detection circuit (30) coupled to the second end of the electromagnetic coil (11) and configured to detect a voltage at the second end of the electromagnetic coil (11), and A determining unit (40) coupled to the first voltage comparing circuit (20) and the voltage detecting circuit (30) and configured to determine whether the electromagnetic coil (11) is broken based on the voltage of the second end of the electromagnetic coil (11) when the voltage of the energy storage capacitor (12) reaches the energy threshold required for trip.
2. The trip mechanism according to claim 1, characterized in that said determining unit (40) comprises: a second voltage comparing circuit (41) coupled to the first voltage comparing circuit (20) and the voltage detecting circuit (30) and configured to compare the voltage of the second terminal of the electromagnetic coil (11) with a preset threshold voltage when the voltage of the storage capacitor (12) reaches the energy threshold required for trip, so as to output a first comparison signal indicating a comparison result of the voltage of the second terminal of the electromagnetic coil (11) with the preset threshold voltage; A timing circuit (42) coupled to the second voltage comparing circuit (41) for timing the duration of the first comparison signal indicating that the voltage at the second end of the electromagnetic coil (11) is less than the preset threshold voltage, and A determining circuit (43) coupled to the timing circuit (42) and configured to determine that a wire break of the electromagnetic coil (11) has occurred when the duration reaches a preset duration.
3. Trip mechanism according to claim 1 or 2, characterized in that said first voltage comparison circuit (20) comprises a comparator (21), said comparator (21) comprising: A first input (211) coupled to the storage capacitor (12) at a first end of the electromagnetic coil (11) to receive a voltage of the storage capacitor (12), and A second input (212) for receiving the energy threshold required for said trip, and -An output (213) coupled to the determination unit (40) for outputting a second comparison signal to the determination unit (40), the second comparison signal being indicative of a comparison of the voltage of the storage capacitor (12) and the energy threshold required for the trip.
4. Trip mechanism according to claim 1 or 2, characterized in that the voltage detection circuit (30) comprises: A voltage dividing circuit (31) coupled to the second end of the electromagnetic coil (11) and provided with a coupling point (313), and -A filter circuit (32) coupled between the coupling point (313) and the determination unit (40).
5. The trip mechanism of claim 4, wherein said voltage divider circuit (31) comprises a first resistor (311) and a second resistor (312) in series, said first resistor (311) being coupled to a second end of said electromagnetic coil (11), said second resistor (312) being grounded, said coupling point (313) being located between said first resistor (311) and said second resistor (312).
6. The trip mechanism of claim 4, further comprising a clamp protection circuit (60) coupled with said filter circuit (32).
7. The trip mechanism according to claim 1 or 2, further comprising a light emitting element (50), said light emitting element (50) being coupled to said determination unit (40), said determination unit (40) being adapted to control the light emitting element (50) to emit light when the voltage of said energy storage capacitor (12) reaches said energy threshold required for trip and it is determined that said electromagnetic coil (11) is not disconnected.
8. A switchgear comprising a trip mechanism according to any one of claims 1 to 7.

Description

Tripping mechanism and switch equipment Technical Field Embodiments of the present disclosure relate to the field of switchgear, and more particularly, to a trip mechanism and switchgear. Background Electromagnetic trip mechanisms are widely used in switchgear, and electromagnetic coils are key components of the electromagnetic trip mechanism for converting electrical energy into magnetic energy. When the circuit coupled with the switch equipment is short-circuited, the electromagnetic coil is electrified and generates a magnetic field, the magnetic field applies magnetic field force to the moving magnet, and the moving magnet immediately acts and triggers the tripping mechanism to trip, so that the circuit is rapidly cut off. During operation of the switchgear, the electromagnetic coil may be subjected to a large external force (e.g., vibration) or subjected to a high temperature for a long time, and thus may be broken. Disclosure of utility model In a first aspect of the present disclosure, a trip mechanism is provided that includes a trip energy supply circuit including an electromagnetic coil including a first end and a second end, and a storage capacitor coupled to the first end of the electromagnetic coil, a first voltage comparison circuit coupled to the storage capacitor at the first end of the electromagnetic coil and configured to compare a voltage of the storage capacitor with an energy threshold required for trip, a voltage detection circuit coupled to the second end of the electromagnetic coil and configured to detect a voltage of the second end of the electromagnetic coil, and a determination unit coupled to the first voltage comparison circuit and the voltage detection circuit and configured to determine whether the electromagnetic coil is broken based on the voltage of the second end of the electromagnetic coil when the voltage of the storage capacitor reaches the energy threshold required for trip. In some embodiments, the determining unit includes a second voltage comparing circuit coupled to the first voltage comparing circuit and the voltage detecting circuit and configured to compare a voltage of the second terminal of the solenoid with a preset threshold voltage to output a first comparison signal indicating a comparison result of the voltage of the second terminal of the solenoid with the preset threshold voltage when the voltage of the storage capacitor reaches an energy threshold required for trip, a timing circuit coupled to the second voltage comparing circuit to time a duration of the first comparison signal indicating that the voltage of the second terminal of the solenoid is less than the preset threshold voltage, and a determining circuit coupled to the timing circuit and configured to determine that a disconnection of the solenoid occurs when the duration reaches the preset duration. In some embodiments, the first voltage comparison circuit comprises a comparator comprising a first input coupled with the energy storage capacitor at a first end of the electromagnetic coil to receive a voltage of the energy storage capacitor, and a second input for receiving an energy threshold required for trip, and an output coupled with the determination unit to output a second comparison signal to the determination unit, the second comparison signal being indicative of a comparison of the voltage of the energy storage capacitor and the energy threshold required for trip. In some embodiments, the voltage detection circuit includes a voltage divider circuit coupled to the second end of the electromagnetic coil and provided with a coupling point, and a filter circuit coupled between the coupling point and the determination unit. In some embodiments, the voltage divider circuit includes a first resistor coupled to the second end of the electromagnetic coil and a second resistor coupled to ground, the coupling point being located between the first resistor and the second resistor. In some embodiments, the trip mechanism further includes a clamp protection circuit coupled to the filter circuit. In some embodiments, the trip mechanism further includes a light emitting element coupled to the determining unit for controlling the light emitting element to emit light when the voltage of the storage capacitor reaches an energy threshold required for trip and it is determined that the electromagnetic coil is not broken. In a second aspect of the present disclosure, there is provided a switching device comprising a trip mechanism according to the first aspect of the present disclosure. In an embodiment according to the present disclosure, the trip mechanism is able to determine whether the electromagnetic coil is broken based on the voltage of the second end of the electromagnetic coil in the case where the storage capacitor is charged (the voltage of the storage capacitor reaches the energy threshold required for trip). Therefore, the tripping mechanism can diagnose whether the electromagnetic coil is b