A fault finding derivative circuit arrangement

Abstract

The utility model relates to electrical technical field, specifically is a kind of fault finding derived loop device, including control box, reset button and pilot lamp are provided on the surface of control box, circuit breaker, relay are provided in control box, circuit breaker is used to introduce power supply in control box, the fault output terminal of equipment to be checked and the coil of relay constitute control loop, circuit breaker, reset button, the first normally open contact of relay and the coil of relay constitute control loop;Circuit breaker, reset button, pilot lamp and the second normally open contact of relay constitute control loop.When the equipment to be checked fails, fault switch is closed, and the fault output terminal outputs switch quantity, so that the coil of relay is powered, and the first normally open contact and the second normally open contact of relay are closed, and the second normally open contact is closed to make pilot lamp powered and light up, so as to prompt maintenance personnel that the corresponding equipment fails;It can quickly investigate the cause of failure, and is suitable for daily fault handling operation.

Description

Technical Field

[0001] This utility model relates to the field of electrical technology, specifically a fault finding derivative circuit device. Background Technology

[0002] Currently, the factory has a large number of high-voltage motors, all powered by high-voltage switchgear. Most motors are controlled by frequency converters or soft starters, with DCS and PLCs used for remote motor starting. The introduction of new control methods has led to an increased failure rate, but most of these are hidden faults that are not easily detected. Therefore, a fault-finding derivative circuit device has been designed to facilitate the heavy workload of daily maintenance.

[0003] Traditional troubleshooting methods cannot detect hidden faults in high-voltage switchgear, as various trip signals can trigger switch operation. Aging internal components in frequency converters and soft starters can also generate trip signals, but no fault alarm information is displayed on the interface, increasing the difficulty of diagnosing faulty circuits. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a fault finding derivative circuit device.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A fault finding derivative circuit device includes a control box. The control box has a reset button and an indicator light on its surface. The control box contains a circuit breaker and a relay. The circuit breaker is used to introduce power into the control box. The fault output terminal of the device under inspection and the coil of the relay form a control circuit. The circuit breaker, the reset button, the first normally open contact of the relay, and the coil of the relay form a control circuit. The circuit breaker, the reset button, the indicator light, and the second normally open contact of the relay form a control circuit.

[0006] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are: When a fault occurs in the equipment under inspection, the fault switch closes, and the fault output terminal outputs a switching signal, thereby energizing the relay coil. The first normally open contact and the second normally open contact of the relay close. The closure of the first normally open contact keeps the relay coil energized, while the closure of the second normally open contact energizes the indicator light, thus alerting the maintenance personnel that the corresponding equipment has malfunctioned. When the fault is cleared, the maintenance personnel press the reset button, the relay coil is de-energized, and the indicator light goes out.

[0007] As a preferred embodiment, a further technical solution of this utility model is: Preferably, the equipment to be inspected includes equipment control local box, high voltage cabinet, DCS controller and frequency converter / soft starter.

[0008] Preferably, the relays are equipment control local box relays, high voltage cabinet relays, DCS controller relays, and frequency converter / soft starter relays. Indicator lights include: indicator lights for the equipment control local box, indicator lights for the high-voltage cabinet, indicator lights for the DCS controller, and indicator lights for the frequency converter / soft starter. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the electrical principle of the fault finding derivative circuit device in this embodiment of the utility model; Figure 2 This is a schematic diagram of the control box in an embodiment of this utility model. Detailed Implementation

[0010] The present invention will be further described below with reference to specific embodiments. The purpose of this description is only to better understand the content of the present invention. Therefore, the examples given do not limit the scope of protection of the present invention.

[0011] like Figure 1 and Figure 2 As shown in the figure, this embodiment provides a fault finding derivative circuit device, including a control box. The surface of the control box is provided with a reset button and an indicator light. The control box contains a circuit breaker and a relay. The circuit breaker is used to introduce power into the control box. The fault output terminal of the device under inspection and the coil of the relay form a control circuit. The circuit breaker, the reset button, the first normally open contact of the relay and the coil of the relay form a control circuit. The circuit breaker, the reset button, the indicator light and the second normally open contact of the relay form a control circuit.

[0012] During implementation, when a fault occurs in the equipment under inspection, the fault switch closes, and the fault output terminal outputs a switching signal, thereby energizing the relay coil. The first normally open contact and the second normally open contact of the relay close. The closure of the first normally open contact keeps the relay coil energized, while the closure of the second normally open contact energizes the indicator light, thus alerting maintenance personnel that the corresponding equipment has malfunctioned. When the fault is cleared, the maintenance personnel press the reset button, the relay coil is de-energized, and the indicator light goes out. Example

[0013] The equipment to be inspected includes the equipment control local box, high-voltage cabinet, DCS controller, and frequency converter / soft starter; the equipment control local box fault switch TA1, high-voltage cabinet fault switch TA2, DCS controller fault switch DCS, and frequency converter / soft starter fault switch INV; the equipment control local box relay ZJ-1, high-voltage cabinet relay ZJ-2, DCS controller relay ZJ-3, and frequency converter / soft starter relay ZJ-4; the indicator lights include: equipment control local box indicator light HY, high-voltage cabinet indicator light HG, DCS controller indicator light HR, and frequency converter / soft starter relay indicator light HW; that is, the fault finding derivative circuit of each piece of equipment to be inspected achieves independent fault display through its own relay. Taking the equipment control local box as an example, the fault switch TA1 of the equipment control local box and the coil of the equipment control local box relay ZJ-1 form a control circuit. The circuit breaker 1DK1, the reset button FA, the first normally open contact ZJ-1-1 of the equipment control local box relay ZJ-1 and the coil of the equipment control local box relay ZJ-1 form a control circuit. The circuit breaker 1DK1, the reset button FA, the equipment control local box indicator light HY and the second normally open contact ZJ-1-2 of the equipment control local box relay ZJ-1 form a control circuit. When a fault occurs in the equipment control local box, the equipment control local box fault switch TA1 closes to indicate a switching signal, energizing the coil of the equipment control local box relay ZJ-1. The first normally open contact ZJ-1-1 and the second normally open contact ZJ-1-2 close. The closure of the first normally open contact ZJ-1-1 keeps the coil of the equipment control local box relay ZJ-1 energized, while the closure of the second normally open contact ZJ-1-2 illuminates the equipment control local box indicator light HY, thus alerting maintenance personnel to the equipment control local box fault. After the fault is cleared, the maintenance personnel press the reset button FA, de-energizing the coil of the equipment control local box relay ZJ-1 and extinguishing the equipment control local box indicator light HY.

[0014] The solution provided by this utility model is a derivative circuit device designed according to the actual production situation of steel plants. It can quickly find the cause of the fault, has simple wiring, provides intuitive and clear fault action information, does not require selection of the usage space, does not require professional cultural training, and is suitable for daily fault handling operations.

[0015] The above description is merely a preferred embodiment of the present utility model and does not limit the scope of the present utility model. All equivalent changes made based on the content of the present utility model specification and its drawings are included within the scope of the present utility model.

Claims

1. A fault-finding derivative circuit device, comprising a control box, characterized in that, The control box has a reset button and indicator light on its surface. Inside the control box are circuit breakers and relays. The circuit breaker is used to introduce power into the control box. The fault output terminal of the equipment under inspection and the coil of the relay form a control circuit. The circuit breaker, reset button, first normally open contact of the relay and the coil of the relay form a control circuit. The circuit breaker, reset button, indicator light and second normally open contact of the relay form a control circuit.

2. The fault finding derivative circuit device according to claim 1, characterized in that, The equipment to be inspected includes the equipment control local box, high voltage cabinet, DCS controller, and frequency converter / soft starter.

3. The fault finding derivative circuit device according to claim 2, characterized in that, Relays include: Equipment control local box relays, high voltage cabinet relays, DCS controller relays, and frequency converter / soft starter relays; Indicator lights include: indicator lights for the equipment control local box, indicator lights for the high-voltage cabinet, indicator lights for the DCS controller, and indicator lights for the frequency converter / soft starter.

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