CN203825164U - Detection platform for DC circuit breaker - Google Patents

Abstract

The utility model discloses a detection platform for a direct current circuit breaker. It includes circuit breaker auxiliary contact, circuit breaker fault detection contact, closing coil and opening coil set in the circuit breaker operating mechanism, circuit breaker auxiliary contact is connected with a state detection device, circuit breaker fault detection contact and a The fault detection device is connected. The state detection device and the fault detection device are connected to the circuit breaker state monitoring module at the same time. The circuit breaker state monitoring module is respectively connected to three PLC control modules. Each PLC control module is connected to a relay and can control their own The relay is disconnected, and each relay is respectively connected to a closing coil, an opening coil and a fault alarm. Its advantages are: the platform can detect various test states of the circuit breaker and complete the mechanical life test of the circuit breaker; it can provide detection signals and detection power for the mechanical characteristic test of the circuit breaker, which greatly simplifies the work of the circuit breaker in the debugging process quantity.

Description

Testing platform for DC circuit breakers

technical field

The utility model relates to a detection platform used in the debugging process of a DC circuit breaker, in particular to a detection platform for a DC circuit breaker. the

Background technique

In the power supply network, the circuit breaker plays a vital role; during the mechanical life test of the circuit breaker, mechanical failures such as the refusal of the operating mechanism and the refusal to open are relatively common problems; traditionally, in most cases, It is mainly based on man-made preventive maintenance and overhaul. The traditional method has the following disadvantages: overhaul is time-consuming; the reliability of the circuit breaker after overhaul may be reduced due to human factors; it cannot reflect the actual operating conditions of the circuit breaker in real time; At the same time, since there is no dedicated detection platform, the relevant contacts of the circuit breaker need to be connected to the detection signal source during the mechanical characteristic test of the circuit breaker, such as opening and closing time, opening and closing speed, and opening and closing synchronism. There are a large number of lines on the circuit breaker, which causes great difficulties in the detection and maintenance of the circuit breaker system. the

Contents of the invention

The technical problem to be solved by the utility model is to provide a circuit breaker that can detect various test states of the circuit breaker, complete the mechanical life test of the circuit breaker, provide detection signals and detection power for the mechanical characteristic test of the circuit breaker, and simplify the work of the circuit breaker in the debugging process. Quantitative detection platform for DC circuit breakers. the

In order to solve the above technical problems, the detection platform for DC circuit breakers of the present invention includes circuit breaker auxiliary contacts set in the circuit breaker operating mechanism which can reflect the energy storage state The circuit breaker fault detection contact for refusal to close or refusal to open, and the closing coil and opening coil for receiving detection signals, the auxiliary contact of the circuit breaker is connected to a state detection device, and the circuit breaker fault detection contact is connected to a fault The detection device is connected. The state detection device and the fault detection device are connected to the circuit breaker state monitoring module at the same time. The circuit breaker state monitoring module is connected to three PLC control modules through cables. Each PLC control module is connected to a relay and can be controlled separately. The respective relays are disconnected, and each of the relays is respectively connected to a closing coil, an opening coil and a fault alarm. the

The circuit breaker state monitoring module is connected to a PC. the

The fault alarm is a buzzer alarm. the

The utility model has the advantages of:

The platform can detect various test states of the circuit breaker, including opening and closing states, fault tripping states, and complete the mechanical life test of the circuit breaker; it can detect the refusal to close and refusal of the operating mechanism of the circuit breaker during the mechanical life test of the circuit breaker phenomenon, and start the fault repair and alarm function; it can provide detection signal and detection power for the mechanical characteristic test of the circuit breaker, which greatly simplifies the workload of the circuit breaker in the debugging process; at the same time, in the mechanical characteristic test, it can provide the circuit breaker Various internal auxiliary devices provide control signals to provide auxiliary detection conditions for the opening and closing time, speed, and synchronization of two poles of the circuit breaker; the detection platform has comprehensive functions, and the electrical wiring is simple and convenient, which improves the efficiency of the circuit breaker in the detection process and reliability.

Description of drawings

Figure 1 is a schematic structural diagram of the circuit breaker operating mechanism;

Fig. 2 is a schematic diagram of the detection platform of the utility model for a DC circuit breaker.

Detailed ways

The detection platform for DC circuit breakers of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. the

As shown in the figure, the detection platform for the DC circuit breaker of the present invention includes the circuit breaker auxiliary contact 1 set in the circuit breaker operating mechanism, which can reflect the energy storage state of the circuit breaker, and can reflect the opening and closing state of the circuit breaker and whether The circuit breaker fault detection contact 3 that has a refusal to close or refusal to open, and the closing coil 4 and opening coil 5 for receiving detection signals, wherein the circuit breaker fault detection contact 3 is connected to the push rod 6 through a linkage mechanism , the auxiliary contact 1 of the circuit breaker can trigger the closing spring 2 in the operating mechanism of the circuit breaker, the auxiliary contact 1 of the circuit breaker is connected with a state detection device 7, the fault detection contact 3 of the circuit breaker is connected with a fault detection device 8, and the state The detection device 7 and the fault detection device 8 are connected to the circuit breaker state monitoring module 9 at the same time, and the circuit breaker state monitoring module 9 is respectively connected to the PLC control module M1, the PLC control module M2 and the PLC control module M3 through cables, and the PLC control module M1 is connected to A relay K1 can control the opening and closing of the relay K1. The PLC control module M2 is connected to a relay K2 and can control the opening and closing of the relay K2. The PLC control module M3 is connected to a relay K3 and can control the opening and closing of the relay K3. The relay K1 is connected to a closing coil. , the relay K2 is connected to an opening coil, the relay K3 is connected to a fault alarm, and the fault alarm circuit has a buzzer alarm, and the circuit breaker status monitoring module 9 is connected to the PC, so that the control command can be issued through the PC . the

The specific connection structure of the utility model is shown in Figure 2, L is the positive pole of the DC power bus, N is the negative pole of the DC power bus, M1 ~ M3 are PLC control modules, and PC is a remote computer; the circuit breaker status monitoring module monitors the status of the circuit breaker The detection device 7 and the fault detection device 8 are used to monitor the closing, opening state or fault tripping state of the circuit breaker; the circuit breaker state monitoring module 9 and the detection device transmit data by communication; the PLC control module M1, the PLC control module M2 and The PLC control module M3 converts the communication signal of the circuit breaker status monitoring module 9 into an electrical signal, and controls the conversion of the internal normally open or normally closed contacts, the relay K1, the relay K2 and the relay K1 are connected with the PLC control module M1 and the PLC control module M2 It is respectively connected with the PLC control module M3, and connected in series with the closing coil 4, the opening coil 5, and the buzzer respectively to drive the mechanical part of the circuit breaker; The PLC control module can provide trigger signals and test signals to realize the opening and closing of circuit breakers, energy storage and the low voltage required for testing. the

Its working principle is as follows:

As shown in Figure 1 and Figure 2, the circuit breaker detection platform turns off the auxiliary contact 1 of the circuit breaker after the energy storage of the circuit breaker is completed, and after the detection platform detects the shutdown signal, it delays opening the closing coil 4; After the action, the auxiliary contact 1 of the circuit breaker is turned on, and triggers the closing spring 2 to store energy; at the same time, the fault detection contact 3 of the circuit breaker detects the current opening and closing state to determine whether the closing is successful: if the closing is unsuccessful That is, the phenomenon of refusal to close, then the circuit breaker status monitoring module 9 of the detection platform transmits the fault signal to the PLC control module M3 and runs the troubleshooting program and starts the buzzer alarm; if it is normally closed, the PLC control module M2 is set according to the PC The delay time triggers the opening coil 5 to open the operating mechanism; if the opening is normal, the auxiliary contact 1 detects whether the energy storage of the circuit breaker is completed, so as to perform cycle control. Since the experiment is to test the mechanical life, only the specified number of mechanical life tests need to be entered in the PC program, and the testing platform can realize fully automatic and unattended operation.

Claims (3)

1. the detection platform for DC circuit breaker, it is characterized in that: comprise the auxiliary contacts of circuit breaker that can reflect breaker energy storage state (1) arranging in circuit breaker operation mechanism, the circuit breaker failure that can reflect isolating switch deciliter state and whether refuse to close or refuse point fault detects contact (3) and for receiving closing coil (4) and the switching winding (5) of detection signal, described auxiliary contacts of circuit breaker (1) is connected with a condition checkout gear (7), circuit breaker failure detects contact (3) and is connected with a failure detector (8), condition checkout gear (7) and failure detector (8) are connected in State-Inspect of High-Voltage Circuit module (9) simultaneously, State-Inspect of High-Voltage Circuit module (9) connects three PLC control modules by cable respectively, each PLC control module connects respectively a relay and the relay that can control respectively separately cut-offs, described each relay connects respectively a closing coil, a switching winding and a fault alarm.

2. according to the detection platform for DC circuit breaker claimed in claim 1, it is characterized in that: described State-Inspect of High-Voltage Circuit module (9) is connected on PC.

3. according to the detection platform for DC circuit breaker claimed in claim 1, it is characterized in that: described fault alarm is buzzer siren.