Device for checking tripping circuit of circuit breaker without power failure

Abstract

According to the device, one end of a tripping outlet pressing plate LP of the circuit breaker in an open state is electrically connected with one end of a first resistor R, and the other end of the first resistor R serving as a middle point is electrically connected with one end of an indicating lamp LD; the other end of the indicating lamp LD is electrically connected with a current coil TBJ / I of the trip-out holding relay and one end of a normally open contact TBJ1 of the trip-out holding relay. After the tripping outlet pressing plate LP is opened, the resistor R and the indicating lamp LD are connected into the tripping loop in series, and the resistor R is used for enabling the current in the loop to be insufficient to start the tripping holding relay. And when the tripping outlet contact TJ is closed and the indicating lamp LD is lightened, the tripping loop of the circuit breaker is proved to be complete, and when the tripping outlet contact TJ is closed and the indicating lamp LD is not lightened, the tripping loop of the circuit breaker is proved to be incomplete. By applying the device, the integrity of the tripping circuit can be detected without power failure.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breaker tripping circuits, and in particular relates to a device for testing a circuit breaker tripping circuit without power outage. Background Art

[0002] A circuit breaker is a switch device that can close, carry and disconnect the current under normal circuit conditions and close, carry and disconnect the current under abnormal circuit conditions within a specified time. Circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to their scope of use. The boundary between high and low voltage is relatively vague. Generally, those above 3kV are called high-voltage electrical appliances. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they have serious overloads or short circuits and undervoltage faults, they can automatically cut off the circuit. Its function is equivalent to the combination of fuse switches and over-underheating relays. Moreover, it is generally not necessary to change parts after breaking the fault current. It has been widely used.

[0003] As for the tripping of the circuit breaker, as mentioned in the patent application number "CN202020323253.3" and the patent name "A fee-controlled circuit breaker tripping circuit monitoring device", the circuit breaker is often monitored by a circuit breaker tripping circuit, and such a circuit breaker tripping circuit is Figure 1 As shown, after the tripping output contact TJ of the circuit breaker is actuated, the tripping holding relay is started through the tripping output pressure plate LP. After the tripping holding relay is actuated, its normally open contact TBJ1 is closed, and the current continues to act on the tripping coil TQ until the circuit breaker is opened. The above process requires a power outage on site to verify the integrity of the circuit breaker opening circuit through a transmission test. However, it is currently very difficult to coordinate power outages, which results in the inability to perform a circuit breaker transmission test to verify the integrity of the tripping circuit without powering off. For this reason, the utility model designs a device for inspecting the tripping circuit of a circuit breaker without powering off, which can perform a circuit breaker transmission test to verify the integrity of the tripping circuit. Figure 2 As shown: After the tripping outlet pressure plate LP is opened, the resistor R and the indicator light RD are connected in series to the tripping circuit. The function of the resistor R is to make the current in the circuit insufficient to start the tripping holding relay. When the tripping outlet contact TJ is closed, the indicator light RD is lit, which proves that the circuit breaker tripping circuit is complete. When the tripping outlet contact is closed, the indicator light RD is not lit, which proves that the circuit breaker tripping circuit is incomplete. The device can be used to check the integrity of the tripping circuit without power outage. Summary of the invention

[0004] In order to solve the above problems, the utility model provides a device for testing the tripping circuit of the circuit breaker without power outage. After the tripping outlet pressure plate LP is opened, the resistor R and the indicator light RD are connected in series to the tripping circuit. The function of the resistor R is to make the current in the circuit insufficient to start the tripping holding relay. When the tripping outlet contact TJ is closed, the indicator light RD is lit, which proves that the circuit breaker tripping circuit is complete. When the tripping outlet contact is closed, the indicator light RD is not lit, which proves that the circuit breaker tripping circuit is incomplete. The device can be used to test the integrity of the tripping circuit without power outage.

[0005] In order to overcome the deficiencies in the prior art, the utility model provides a solution for a device for testing a circuit breaker tripping circuit without power outage, which is as follows:

[0006] A device for testing a circuit breaker tripping circuit without power outage, comprising:

[0007] One end of the trip output pressure plate LP of the circuit breaker in the open state is electrically connected to one end of a resistor R, the other end of the resistor R serving as the midpoint is electrically connected to one end of the indicator light RD, and the other end of the indicator light RD, the current coil TBJ / I of the trip holding relay, and one end of the normally open contact TBJ1 of the trip holding relay are electrically connected.

[0008] Preferably, one end of the trip output pressure plate LP of the circuit breaker in the open state which is electrically connected to one end of the resistor R is also electrically connected to one end of the trip output contact TJ of the circuit breaker, and the other end of the trip output contact TJ of the circuit breaker is electrically connected to the positive control bus KM+.

[0009] Preferably, the other end of the normally open contact TBJ1 of the trip-holding relay is electrically connected to the positive control bus KM+.

[0010] Preferably, the other end of the current coil TBJ / I of the trip holding relay is electrically connected to one end of the circuit breaker auxiliary normally closed contact DL, the other end of the circuit breaker auxiliary normally closed contact DL is electrically connected to one end of the trip coil TQ, and the other end of the trip coil TQ is electrically connected to the negative control bus KM-.

[0011] Preferably, the circuit breaker is a ZW8-12 series outdoor high-voltage vacuum circuit breaker.

[0012] Preferably, the resistance value of resistor 1 is 1K ohm.

[0013] Preferably, the middle point is also electrically connected to pin 2 of the controller D1.

[0014] Preferably, pin 3 of the controller D1 is electrically connected to one end of the resistor R5, the other end of the resistor R5 is electrically connected to the base of the transistor Q1, the emitter of the transistor Q1 is electrically connected to the 5V voltage source 5V, the collector of the transistor Q1 is electrically connected to the positive electrode of the speaker B1, and the negative electrode of the speaker B1 is grounded.

[0015] Preferably, the 5V voltage source 5V is electrically connected to pin 20 of the controller D1.

[0016] Preferably, the 5V voltage source 5V is electrically connected to one electrode of the capacitor C1, and the other electrode of the capacitor C1 is grounded.

[0017] Preferably, the 5V voltage source 5V is electrically connected to one electrode of the second capacitor C20, and the other electrode of the second capacitor C20 is grounded.

[0018] The beneficial effects of the utility model are:

[0019] One end of the tripping outlet pressure plate LP of the circuit breaker in the open state is electrically connected to one end of the resistor R, and the other end of the resistor R as the middle point is electrically connected to one end of the indicator light RD, and the other end of the indicator light RD is electrically connected to the current coil TBJ / I of the tripping holding relay and one end of the normally open contact TBJ1 of the tripping holding relay. After the tripping outlet pressure plate LP is opened, the resistor R and the indicator light RD are connected in series to the tripping circuit. The function of the resistor R is to make the current in the circuit insufficient to start the tripping holding relay. When the tripping outlet contact TJ is closed, the indicator light RD is lit, which proves that the circuit breaker tripping circuit is complete. When the tripping outlet contact is closed, the indicator light RD is not lit, which proves that the circuit breaker tripping circuit is incomplete. The use of this device can realize the integrity inspection of the tripping circuit without power outage. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall principle of the circuit breaker tripping circuit in the prior art;

[0021] Figure 2 It is a schematic diagram of the overall principle of the device for testing the tripping circuit of a circuit breaker without power outage of the utility model;

[0022] Figure 3 It is a circuit connection diagram of the controller of the utility model;

[0023] Figure 4 It is a circuit connection schematic diagram of the speaker of the utility model. DETAILED DESCRIPTION

[0024] As for the tripping of the circuit breaker, as mentioned in the patent application number "CN202020323253.3" and the patent name "A fee-controlled circuit breaker tripping circuit monitoring device", the circuit breaker is often monitored by a circuit breaker tripping circuit, and such a circuit breaker tripping circuit is Figure 1 As shown, after the tripping output contact TJ of the circuit breaker is actuated, the tripping holding relay is started through the tripping output pressure plate LP. After the tripping holding relay is actuated, its normally open contact TBJ1 is closed, and the current continues to act on the tripping coil TQ until the circuit breaker is opened. The above process requires a power outage on site to verify the integrity of the circuit breaker opening circuit through a transmission test. However, it is currently very difficult to coordinate power outages, which results in the inability to perform a circuit breaker transmission test to verify the integrity of the tripping circuit without powering off. For this reason, the utility model designs a device for inspecting the tripping circuit of a circuit breaker without powering off, which can perform a circuit breaker transmission test to verify the integrity of the tripping circuit. Figure 2 As shown: After the tripping outlet pressure plate LP is opened, the resistor R and the indicator light RD are connected in series to the tripping circuit. The function of the resistor R is to make the current in the circuit insufficient to start the tripping holding relay. When the tripping outlet contact TJ is closed, the indicator light RD is lit, which proves that the circuit breaker tripping circuit is complete. When the tripping outlet contact is closed, the indicator light RD is not lit, which proves that the circuit breaker tripping circuit is incomplete. The device can be used to check the integrity of the tripping circuit without power outage.

[0025] The present invention will be preferably described below in conjunction with the accompanying drawings and embodiments.

[0026] like Figures 1 to 4 As shown, the device for testing a circuit breaker tripping circuit without power outage described in the utility model comprises:

[0027] One end of the trip output pressure plate LP of the circuit breaker in the open state is electrically connected to one end of a resistor R, the other end of the resistor R serving as the midpoint is electrically connected to one end of the indicator light RD, and the other end of the indicator light RD, the current coil TBJ / I of the trip holding relay, and one end of the normally open contact TBJ1 of the trip holding relay are electrically connected.

[0028] In this way, one end of the tripping outlet pressure plate LP of the circuit breaker in the open state is electrically connected to one end of the resistor R, and the other end of the resistor R as the middle point is electrically connected to one end of the indicator light RD, and the current coil TBJ / I of the tripping holding relay at the other end of the indicator light RD is electrically connected to one end of the normally open contact TBJ1 of the tripping holding relay. After the tripping outlet pressure plate LP is opened, the resistor R and the indicator light RD are connected in series to the tripping circuit. The function of the resistor R is to make the current in the circuit insufficient to start the tripping holding relay. When the tripping outlet contact TJ is closed, the indicator light RD is lit, which proves that the circuit breaker tripping circuit is complete. When the tripping outlet contact is closed, the indicator light RD is not lit, which proves that the circuit breaker tripping circuit is incomplete. The application of this device can realize the integrity inspection of the tripping circuit without power outage.

[0029] In a preferred but non-limiting embodiment of the utility model, one end of the trip output pressure plate LP of the circuit breaker in an open state, which is electrically connected to one end of the resistor R, is also electrically connected to one end of the trip output contact TJ of the circuit breaker, and the other end of the trip output contact TJ of the circuit breaker is electrically connected to the positive control bus KM+.

[0030] In this way, one end of the trip output pressure plate LP of the circuit breaker in an open state, which is electrically connected to one end of the resistor R, is also electrically connected to one end of the trip output contact TJ of the circuit breaker, and the other end of the trip output contact TJ of the circuit breaker is electrically connected to the positive control bus KM+. When the circuit breaker trips, the trip output contact TJ can be closed, thereby forming a circuit breaker tripping circuit with the cooperation of the components described later.

[0031] In a preferred but non-limiting embodiment of the present invention, the other end of the normally open contact TBJ1 of the trip-hold relay is electrically connected to the positive control bus KM+.

[0032] In a preferred but non-limiting embodiment of the utility model, the other end of the current coil TBJ / I of the trip holding relay is electrically connected to one end of the auxiliary normally closed contact DL of the circuit breaker, the other end of the auxiliary normally closed contact DL of the circuit breaker is electrically connected to one end of the trip coil TQ, and the other end of the trip coil TQ is electrically connected to the negative control bus KM-.

[0033] In this way, the other end of the normally open contact TBJ1 of the trip-holding relay is electrically connected to the positive control bus KM+, the other end of the current coil TBJ / I of the trip-holding relay is electrically connected to one end of the auxiliary normally closed contact DL of the circuit breaker, the other end of the auxiliary normally closed contact DL of the circuit breaker is electrically connected to one end of the trip coil TQ, and the other end of the trip coil TQ is electrically connected to the negative control bus KM-. When the circuit breaker tripping circuit is started, the normally open contact TBJ1 of the trip-holding relay is self-holding the trip contact to ensure that the circuit breaker completes the tripping.

[0034] In a preferred but non-limiting embodiment of the present invention, the circuit breaker is a ZW8-12 series outdoor high-voltage vacuum circuit breaker.

[0035] In a preferred but non-limiting embodiment of the present invention, the resistance value of resistor 1 is 1K ohm.

[0036] In this case, the circuit breaker is a ZW8-12 series outdoor high-voltage vacuum circuit breaker, and the resistance value of resistor 1 is 1K ohms, so that the current in the circuit is insufficient to start the tripping holding relay.

[0037] In a preferred but non-limiting embodiment of the present invention, the middle point is also electrically connected to pin 2 of the controller D1. The model of the controller D1 is Figure 3 The string at the bottom of the box represented by D1 in the figure refers to.

[0038] In this way, the middle point is also electrically connected to pin 2 of the controller D1, so the signal of the middle point can be transmitted to the controller D1.

[0039] In a preferred but non-limiting embodiment of the present invention, pin 3 of the controller D1 is electrically connected to one end of the resistor R5, the other end of the resistor R5 is electrically connected to the base of the transistor Q1, the emitter of the transistor Q1 is electrically connected to the 5V voltage source 5V, the collector of the transistor Q1 is electrically connected to the positive electrode of the speaker B1, and the negative electrode of the speaker B1 is grounded.

[0040] In this way, pin 3 of controller D1 is electrically connected to one end of resistor R5, the other end of resistor R5 is electrically connected to the base of transistor Q1, the emitter of transistor Q1 is electrically connected to 5V voltage source 5V, the collector of transistor Q1 is electrically connected to the positive pole of speaker B1, and the negative pole of speaker B1 is grounded. When the tripping output contact TJ is closed, the signal transmitted to the middle point in the controller D1 is a high level, and pin 3 of controller D1 outputs a low level to turn off transistor Q1. At this time, if the speaker does not sound, it proves that the circuit breaker tripping circuit is complete. When the tripping output contact is closed, the signal transmitted to the middle point in the controller D1 is a low level, and pin 3 of controller D1 outputs a high level to turn on transistor Q1. At this time, the speaker sounds, which proves that the circuit breaker tripping circuit is incomplete.

[0041] In a preferred but non-limiting embodiment of the present invention, a 5V voltage source 5V is electrically connected to pin 20 of the controller D1.

[0042] In this way, the 5V voltage source 5V is electrically connected to the 20th pin of the controller D1, and can provide power to the controller D1.

[0043] In a preferred but non-limiting embodiment of the present invention, a 5V voltage source 5V is electrically connected to one electrode of a capacitor C1, and the other electrode of the capacitor C1 is grounded.

[0044] In a preferred but non-limiting embodiment of the present invention, the 5V voltage source 5V is electrically connected to one electrode of the second capacitor C20, and the other electrode of the second capacitor C20 is grounded.

[0045] In this way, the 5V voltage source 5V is electrically connected to one electrode of the capacitor C1, and the other electrode of the capacitor C1 is grounded. The 5V voltage source 5V is electrically connected to one electrode of the capacitor C20, and the other electrode of the capacitor C20 is grounded. The voltage source can be filtered through the two capacitors.

[0046] The beneficial effects of the utility model are:

[0047] One end of the tripping outlet pressure plate LP of the circuit breaker in the open state is electrically connected to one end of the resistor R, and the other end of the resistor R as the middle point is electrically connected to one end of the indicator light RD, and the other end of the indicator light RD is electrically connected to the current coil TBJ / I of the tripping holding relay and one end of the normally open contact TBJ1 of the tripping holding relay. After the tripping outlet pressure plate LP is opened, the resistor R and the indicator light RD are connected in series to the tripping circuit. The function of the resistor R is to make the current in the circuit insufficient to start the tripping holding relay. When the tripping outlet contact TJ is closed, the indicator light RD is lit, which proves that the circuit breaker tripping circuit is complete. When the tripping outlet contact is closed, the indicator light RD is not lit, which proves that the circuit breaker tripping circuit is incomplete. The use of this device can realize the integrity inspection of the tripping circuit without power outage.

[0048] The present invention has been described above in an illustrative manner using embodiments. Those skilled in the art should understand that the present disclosure is not limited to the embodiments described above, and that various changes, modifications and substitutions may be made without departing from the scope of the present invention.

Claims

1. A device for testing a circuit breaker tripping circuit without power outage, characterized in that: include: One end of the trip output pressure plate LP of the circuit breaker in the open state is electrically connected to one end of a resistor R, the other end of the resistor R serving as the midpoint is electrically connected to one end of the indicator light RD, and the other end of the indicator light RD, the current coil TBJ / I of the trip holding relay, and one end of the normally open contact TBJ1 of the trip holding relay are electrically connected.

2. The device for testing the tripping circuit of a circuit breaker without power outage according to claim 1, characterized in that: One end of the trip output pressure plate LP of the circuit breaker in the open state, which is electrically connected to one end of the resistor R, is also electrically connected to one end of the trip output contact TJ of the circuit breaker, and the other end of the trip output contact TJ of the circuit breaker is electrically connected to the positive control bus KM+.

3. The device for testing the tripping circuit of a circuit breaker without power outage according to claim 1, characterized in that: The other end of the normally open contact TBJ1 of the trip holding relay is electrically connected to the positive control bus KM+.

4. The device for testing a circuit breaker tripping circuit without power outage according to claim 1, characterized in that: The other end of the current coil TBJ / I of the trip holding relay is electrically connected to one end of the auxiliary normally closed contact DL of the circuit breaker, the other end of the auxiliary normally closed contact DL of the circuit breaker is electrically connected to one end of the trip coil TQ, and the other end of the trip coil TQ is electrically connected to the negative control bus KM-.

5. The device for testing the tripping circuit of a circuit breaker without power outage according to claim 1, characterized in that: The circuit breaker is a ZW8-12 series outdoor high voltage vacuum circuit breaker.

6. The device for testing a circuit breaker tripping circuit without power outage according to claim 1, characterized in that: The resistance value of resistor one is 1K ohm.

7. The device for testing a circuit breaker tripping circuit without power outage according to claim 1, characterized in that: The middle point is also electrically connected to pin 2 of controller D1.

8. The device for testing a circuit breaker tripping circuit without power outage according to claim 1, characterized in that: Pin 3 of controller D1 is electrically connected to one end of resistor R5, the other end of resistor R5 is electrically connected to the base of transistor Q1, the emitter of transistor Q1 is electrically connected to 5V voltage source 5V, the collector of transistor Q1 is electrically connected to the positive electrode of speaker B1, and the negative electrode of speaker B1 is grounded.

9. The device for testing a circuit breaker tripping circuit without power outage according to claim 1, characterized in that: The 5V voltage source 5V is electrically connected to pin 20 of the controller D1.

10. The device for testing a circuit breaker tripping circuit without power outage according to claim 1, characterized in that: The 5V voltage source 5V is electrically connected to one electrode of the capacitor C1, and the other electrode of the capacitor C1 is grounded; the 5V voltage source 5V is electrically connected to one electrode of the capacitor C20, and the other electrode of the capacitor C20 is grounded.

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