CN203069751U - Circuit breaker state monitoring device - Google Patents

Abstract

The utility model relates to a circuit breaker state monitoring device, which belongs to the field of electric power measuring instruments. The circuit breaker state monitoring device is characterized in that it includes an input circuit, a resistor voltage divider circuit, a voltage regulator circuit, and a signal output circuit, the input circuit is connected to the resistor voltage divider circuit, and the resistor voltage divider circuit is connected to the signal output circuit through the voltage regulator circuit . The utility model has a reasonable structure and is easy to use. Through the opening and closing of the optocoupler relay, the charging status at the outlet of the circuit breaker is converted into a switch value, and then used as an input signal of the switch value monitoring device, which is convenient for the switch value monitoring device to monitor the circuit breaker.

Description

Circuit breaker status monitoring device

technical field

The utility model relates to a circuit breaker state monitoring device, which belongs to the field of electric power measuring instruments. the

Background technique

The vast majority of substations are unattended, so it is necessary to remotely monitor the opening and closing status of circuit breakers and switches in substations. At present, the monitoring of the status of circuit breakers is mainly based on monitoring the status auxiliary contacts of the circuit breakers. , because the state auxiliary contact is linked with the opening and closing state of the circuit breaker, it can provide a dry contact for other switch monitoring equipment to monitor the state of the circuit breaker. There are two disadvantages in this monitoring method. One is that although the opening and closing state of the circuit breaker is monitored, it cannot detect whether there is voltage at the outlet of the circuit breaker. In fact, the user is most concerned about the latter; Point, not only occupy the front panel space of the cabinet, but also the cost is high. the

Utility model content

According to the deficiencies in the prior art above, the technical problem to be solved by the utility model is to provide a low-cost and easy-to-implement circuit breaker state monitoring device. the

The technical solution adopted by the utility model to solve the technical problem is to provide a circuit breaker state monitoring device, which is characterized in that it includes an input circuit, a resistor voltage divider circuit, a voltage regulator circuit, a signal output circuit, and the input circuit is connected to a resistor divider circuit, the resistor divider circuit is connected to the signal output circuit through the voltage stabilizing circuit. the

The input circuit is a rectification circuit, including rectification diodes D1-D4, rectification diode D1 is connected in parallel with rectification diode D2, rectification diode D3 is connected in parallel with rectification diode D4, rectification diode D1 is connected with rectification diode D4, and rectification diode D2 is connected with rectification diode D3. the

The resistor divider circuit consists of a resistor R1 and a resistor R2 connected in parallel. the

Voltage Stabilizing Circuit The voltage stabilizing circuit includes a voltage stabilizing tube D5, a voltage stabilizing tube D6, a capacitor C1 and a capacitor C2, and the voltage stabilizing tube D5, capacitor C1 and capacitor C2 are connected in parallel to the voltage stabilizing tube D6. the

The signal output circuit is an optocoupler relay. the

Capacitor C1 is a point solution capacitor, and capacitor C2 is a ceramic chip capacitor. the

The beneficial effect of the utility model is that the structure is reasonable, and the use is convenient. Through the opening and closing of the optocoupler relay, the electrified state at the outlet of the circuit breaker is converted into a switch value, and then used as an input signal of the switch value monitoring device, which facilitates the subsequent switch value monitoring. The device monitors the circuit breaker. the

Description of drawings

Fig. 1 is the utility model circuit schematic diagram;

Detailed ways

Embodiments of the utility model are further described below in conjunction with the accompanying drawings:

The circuit breaker state monitoring device shown in Figure 1 includes an input circuit, a resistor divider circuit, a voltage regulator circuit, and a signal output circuit. The input circuit is connected to the resistor divider circuit, and the resistor divider circuit is connected to the signal output circuit through the regulator circuit. The input circuit is a rectification circuit, including rectification diodes D1-D4, rectification diode D1 is connected in parallel with rectification diode D2, rectification diode D3 is connected in parallel with rectification diode D4, rectification diode D1 is connected with rectification diode D4, and rectification diode D2 is connected with rectification diode D3. The resistor divider circuit consists of a resistor R1 and a resistor R2 connected in parallel. the

Voltage stabilizing circuit The voltage stabilizing circuit includes a voltage stabilizing tube D5, a voltage stabilizing tube D6, a capacitor C1 and a capacitor C2, and the voltage stabilizing tube D5, capacitor C1 and capacitor C2 are connected in parallel to the voltage stabilizing tube D6. The signal output circuit is an optocoupler relay. Capacitor C1 is a point solution capacitor, and capacitor C2 is a ceramic chip capacitor. the

The input circuit has its own rectification circuit, so the input terminal voltage does not need to distinguish between positive and negative poles. the

If the outlet of the circuit breaker is charged, its input voltage is relatively high, the rated voltage is DC250V, and the voltage at both ends of the output optical coupler is only about 3V. Therefore, the input circuit part needs a resistor with a large resistance and power. Share the excess voltage to ensure reliable and stable operation of the circuit. the

The voltage stabilizing circuit of the utility model is composed of a voltage stabilizing tube and a capacitor, so that the voltage at the control terminal of the optical coupler is constant at 3V, and an electrolytic capacitor and a ceramic chip capacitor need to be connected in parallel at the control terminal of the optical coupler, so that even if the voltage at the input terminal changes , and will not affect the stable operation of the optical coupler, ensuring the stability of the output signal. the

The input circuit is connected to the outlet of the circuit breaker. If there is voltage at the outlet of the circuit breaker, the optocoupler relay outputs a high-level signal; if there is no voltage at the outlet of the circuit breaker, the optocoupler relay outputs a low-level signal. The output signal indicates the opening and closing state of the circuit breaker, which is used as the input signal of the switching value monitoring equipment. the

Claims (6)

1. A circuit breaker state monitoring device, characterized in that it comprises an input circuit, a resistor voltage divider circuit, a voltage regulator circuit, a signal output circuit, the input circuit is connected to the resistor voltage divider circuit, and the resistor voltage divider circuit is connected to the signal output through the voltage regulator circuit circuit. the 2. The circuit breaker state monitoring device according to claim 1, characterized in that, the input circuit is a rectifier circuit, including rectifier diodes D1-D4, rectifier diode D1 and rectifier diode D2 are connected in parallel, rectifier diode D3 and rectifier diode D4 is connected in parallel, the rectifier diode D1 is connected with the rectifier diode D4, and the rectifier diode D2 is connected with the rectifier diode D3. the 3. The circuit breaker state monitoring device according to claim 1, characterized in that, the resistor divider circuit is composed of a resistor R1 and a resistor R2 connected in parallel. the 4. The circuit breaker state monitoring device according to claim 1, characterized in that, the voltage stabilizing circuit comprises a voltage stabilizing tube D5, a voltage stabilizing tube D6, a capacitor C1 and a capacitor C2, a voltage stabilizing tube D5, a capacitor C1 and The capacitor C2 is connected in parallel with the regulator tube D6. the 5. The circuit breaker state monitoring device according to claim 1, wherein the signal output circuit is an optocoupler relay. the 6 . The circuit breaker state monitoring device according to claim 4 , wherein the capacitor C1 is a point solution capacitor, and the capacitor C2 is a ceramic chip capacitor. 7 . the

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