CN204089350U - The electric emergency treatment device of circuit breaker - Google Patents

Abstract

The utility model discloses an electric emergency treatment device for a circuit breaker, which comprises a power supply, a circuit breaker, a delay return relay, a delay exit relay, a DC bipolar fast opening switch and a plurality of terminal posts. The branch switch is connected to the power supply via two binding posts; the normally closed switch of the delay return relay is connected to the coil of the delay exit relay, and the normally open switch of the delay exit relay is also connected to the circuit breaker through two binding posts. The utility model has simple and convenient wiring operation, which can be operated safely and quickly by ordinary operators. At the same time, the operation reliability of the device is high, the operation process is clear, and the design of the control circuit is simple and practical. The utility model can cut off the faulty equipment damaged by the protection measurement and control device or the tripping coil of the circuit breaker or the control circuit in a shorter time, and has good practical application value.

Description

Circuit breaker electrical emergency treatment device

technical field

The utility model relates to an electrical emergency treatment device for a circuit breaker.

Background technique

At present, the remote operation function of the circuit breaker is lost after the protection, measurement and control device of the circuit breaker is damaged, and the circuit breaker loses the on-site electric power when the control circuit or components inside the circuit breaker are damaged (such as the opening and closing coils are damaged, the auxiliary contacts are blocked, etc.). Operation function. When the protection, measurement and control, communication device or tripping coil is damaged, the circuit breaker cannot be operated remotely, which brings a greater safety risk to personnel and equipment. Sometimes it is even necessary to cut off the power of the entire busbar for processing, which increases the switching operation tasks and operational risks. If a short-circuit fault occurs in the area when the circuit breaker fails, it may cause a leapfrog trip accident, which will bring great pressure to the safe operation of the power grid and high-quality power supply services.

Utility model content

The purpose of the utility model is to provide an electrical emergency treatment device for a circuit breaker that can perform electrical automatic operation on the circuit breaker to quickly remove the load after the circuit breaker loses the remote operation function or the local operation function.

The circuit breaker electrical emergency treatment device provided by the utility model includes a power supply, a circuit breaker, a delay return relay, a delay exit relay, a DC bipolar fast opening switch and a number of terminal posts. The sub-switch is connected to the power supply via two terminal posts, which are power input terminals; the normally closed switch of the delay return relay is connected to the coil of the delay export relay, and the normally open switch of the delay export relay is also connected through two terminals. The two terminals are connected to the circuit breaker, and the two terminals are delay output terminals.

The device also includes a signal indicator light, and the series circuit composed of the signal indicator light and the normally open switch of the delay return relay is connected between the two ends of the direct current bipolar fast opening switch which are not connected to the power supply.

Both the delayed return relay and the delayed exit relay adopt time relays, the delay time of which can be set and adjusted, and the delay set value of the delayed return relay is greater than the delay set value of the delayed exit relay .

The power supply adopts the DC control power supply in the circuit breaker control cabinet.

The utility model has simple and convenient wiring operation, which can be operated safely and quickly by ordinary operators. At the same time, the operation reliability of the device is high, the operation process is clear, and the design of the control circuit is simple and practical. The utility model can cut off the faulty equipment damaged by the protection measurement and control device or the tripping coil of the circuit breaker or the control circuit in a shorter time, and has good practical application value. The application of the utility model greatly reduces the unprotected running time and fault running time of the circuit breaker, and effectively improves the safety and reliability of the power grid and equipment. At the same time, the utility model avoids on-site operation of personnel when the circuit breaker fails to open, effectively protects the safety of operation and maintenance personnel, and plays a very good role in improving the safety production level of transportation inspection.

Description of drawings

Fig. 1 is a schematic diagram of the principle of the utility model.

Fig. 2 is a control circuit diagram of an embodiment of the present invention.

Detailed ways

When the protection measurement and control device or communication device is damaged, the circuit breaker loses the remote operation function, but the control circuit of the circuit breaker itself is intact, according to the principle of electrical automatic operation, the utility model realizes the automatic operation of the circuit breaker through its external electrical circuit. Trip control.

The utility model solves the problem of realizing the electrical automatic operation of the circuit breaker to quickly cut off the load when the circuit breaker loses the function of remote operation or on-site operation, and realizes the on-site load operation of the circuit breaker.

The application occasion of the utility model is in the secondary part of the transformer.

As shown in Figure 1, the utility model includes a power supply, a circuit breaker, a delay return relay, a delay exit relay, a DC double-pole fast opening switch and some terminal posts. The delay return relay is connected to the power supply through the DC bipolar quick-opening switch and then through two terminals, which are the power input terminals; the normally closed switch of the delay return relay is connected to the coil of the delay export relay, The normally open switch of the outlet relay is also connected to the circuit breaker through two binding posts, and these two binding posts are delay output terminals.

The utility model also includes a signal indicator light, and a series circuit composed of the signal indicator light and the normally open switch of the delay return relay is connected between the two ends of the DC bipolar quick opening switch not connected to the power supply.

As shown in Figure 2, the utility model includes a delay return relay SJ1, a delay exit relay SJ2, a signal indicator light XD, a DC bipolar fast opening switch DK, a terminal JXZ1, a terminal JXZ2, a terminal JXZ3, and a terminal JXZ4 , protection resistor R, circuit breaker and power supply.

The utility model comprises a delay reset start circuit, a delay exit start circuit, a device work indication circuit and a delay exit tripping circuit. The delay return starting circuit is composed of the coil of the delay return relay SJ1 and the protection resistor R connected in series. The delayed exit starting circuit is composed of the coil of the delayed exit relay SJ2 and the normally closed switch of the delayed return relay SJ1 connected in series. The working indication circuit of the device is composed of the signal indicator light XD and the normally open switch of the delay return relay SJ1 connected in series. The delay exit tripping circuit is composed of the normally closed switch of the delay exit relay SJ2 connected in series with the circuit breaker via the terminal JXZ3.

The terminal JXZ1 is connected between the positive terminal of the power supply and the No. 1 switch of the DC bipolar quick opening switch DK, and the terminal JXZ2 is connected between the negative terminal of the power supply -KM and the No. 2 switch of the DC bipolar quick opening switch DK. The No. 2 switch of the DC bipolar fast opening switch DK is connected between the terminal JXZ2 and the terminal JXZ4. The delay reset start circuit, the delay exit start circuit, and the device work indication circuit are connected in parallel and then connected between the terminal JXZ4 and the No. 1 switch of the DC bipolar quick opening switch DK. The delay exit tripping circuit is connected between the terminal JXZ4 and the negative terminal of the power supply -KM.

In terms of power selection, the utility model adopts the DC control power supply in the circuit breaker cabinet to avoid the introduction of interference, and at the same time, the circuit connection uses wired to avoid radio interference to the utility model. The utility model only needs to be connected with two DC power lines and an outlet tripping (closing) line to realize the electrical emergency operation of the circuit breaker.

Both the delayed return relay and the delayed exit relay can use time relays. The utility model can freely set the exit action time (as shown in the delay exit relay SJ2 in Figure 2), and can set the appropriate time according to the distance, which is convenient for the operator to evacuate to the safe area. At the same time, the device is also equipped with an adjustable automatic Return time (shown as delay return relay SJ1 in Figure 2), so as not to burn out circuit breaker tripping (closing) coil components when the circuit breaker cannot operate correctly. The delay time of these two relays can be set and adjusted, but it is necessary to ensure that the delay setting value of the delay return relay is greater than the delay setting value of the delay exit relay to avoid device damage.

The indicator light in the electrical operation circuit of the utility model can not only monitor whether the input of the control power supply is normal, but also judge whether the device components are working normally.

The use of the utility model can cut off faulty equipment damaged in a protection measurement and control device or damaged in a circuit breaker tripping coil or a control circuit in a shorter time, and has good practical application value.

(1) Safety benefits. The application of the utility model reduces the unprotected running time and fault running time of the circuit breaker by about 70% compared with before use, and effectively improves the safety and reliability of the power grid and equipment.

At the same time, the use of the emergency treatment device when the circuit breaker fails to open the gate avoids the on-site operation of personnel, effectively protects the safety of operation and maintenance personnel, and plays a very good role in improving the safety production level of transportation inspection.

(2) Management benefits. When the equipment breaks down and cannot be remotely moved or electrically operated on the spot, according to the analysis of the actual work flow, it takes 2 to 4 hours of processing time; after using the utility model, it only takes 30 minutes at most to realize the faulty equipment. Isolation greatly reduces the equipment failure running time. In the switching operation after a fault, after using the utility model, the operating time of the interconnected circuit breaker is reduced by 76.2%, and the operating time of the non-interconnected circuit breaker is reduced by 71.7%. This has improved the safety and reliability of the power grid, ensured fast and reliable power supply to users, improved the company's power supply service quality, and fulfilled its commitment to high-quality social services.

The application of the utility model can also promote the improvement of the lean management level of the transportation inspection. Based on the statistical data of the substation maintenance room of a power supply company, in 2013, 52 sets of protective devices and tripping coils that affected the operation of circuit breakers were damaged. Originally, 39 sets x 6 people/set x 2.1 hours + 13 sets x 6 people were needed /set x 3.6 hours = 772 people per hour, after using the substation circuit breaker emergency treatment device, 39 sets x 2 people / set x 0.52 hours + 13 sets x 2 people / set x 1.06 hours = 68 people per hour; Reduced 704 man-hours and increased work efficiency by 91.19%. In the isolation of faults, the efficiency of switching operations has increased by more than 70%. After the utility model is popularized and used, it will effectively improve the lean management level of the company's transportation inspection.

(3) Economic benefits. The improvement of work efficiency will greatly improve the company's operation and maintenance benefits. Based on the previous statistical data of the above-mentioned power supply company's substation maintenance room, 52 sets of protection devices and tripping coils that affect the operation of circuit breakers were damaged as an example. Referring to a city in 2013 Calculated on a per capita annual income of 33,662 yuan, the labor cost can be saved by 33,662 yuan/person/(250 days*8 hours/day)*704 people·hours/1588 units*3564 units=26,593 yuan; based on vehicle fuel costs and loss of 300 yuan/time For example, the vehicle cost can be saved by 300 yuan/unit*52 units/1588 units*3564 units=35011 yuan; the subtotal of the power supply company’s annual circuit breaker maintenance cost reduction is 26593 yuan+35011 yuan=61604 yuan. If it is promoted and used in the whole province where the city is located, there are currently 193.16 million 10kV circuit breakers in the province, and it is estimated that the annual maintenance cost can be saved by 193.16 million units/3564 units*61604 yuan=334,000 yuan.

Claims (4)

1. the electric emergency treatment device of circuit breaker, comprise power supply and circuit breaker, it is characterized in that, this device also comprises time delay return relay, time delay exit relay, the fast switch-dividing of DC bipolar and some binding posts, time delay return relay is connected with power supply via two binding posts by the fast switch-dividing of DC bipolar again, and these two binding posts are power input; The normally closed switch of time delay return relay is connected with the coil of time delay exit relay, and the normal open switch of time delay exit relay is also connected with circuit breaker by two binding posts, and these two binding posts are time delay output.

2. the electric emergency treatment device of circuit breaker according to claim 1, it is characterized in that, this device also comprises signal lamp, and the series circuit that signal lamp and the normal open switch of time delay return relay form is connected between the two ends be not connected with power supply of the fast switch-dividing of DC bipolar.

3. the electric emergency treatment device of circuit breaker according to claim 1, it is characterized in that, described time delay return relay and described time delay exit relay all adopt the time relay, its delay time all can be arranged and adjustment, and the delay adjustments value of time delay return relay is greater than the delay adjustments value of time delay exit relay.

4. the electric emergency treatment device of circuit breaker according to claim 1, is characterized in that, described power acquisition DC control supply in described circuit breaker control cabinet.