CN209545135U - The low automatic opening operation power supply device of SF6 breaker air pressure - Google Patents

Abstract

The utility model provides a kind of low automatic opening operation power supply device of SF6 breaker air pressure, its feature: installation's power source is separately connected SF6 pressure gauge, microprocessor, controlled switch by device conducting wire, SF6 pressure gauge, microprocessor, controlled switch are sequentially connected by signal wire, and operation circuit power supply, controlled switch, breaker operator circuit are sequentially connected by operation circuit conducting wire.The utility model has the advantages that the low automatic opening operation power supply device of SF6 breaker air pressure, automatic to disconnect SF6 circuitbreaker control power supply when SF6 breaker SF6 pressure is lower than locking value, manpower is saved, SF6 circuitbreaker control power supply can be disconnected in time, it is novel in design, practical.

Description

SF6 circuit breaker automatically cuts off the operating power supply device when the air pressure is low

technical field

The utility model relates to an automatic device, in particular to a power supply device for automatically disconnecting an SF6 circuit breaker when the air pressure is low.

Background technique

In power grid operation, SF6 circuit breaker is a circuit breaker that uses sulfur hexafluoride (SF6) gas as arc extinguishing medium and insulating medium. When the SF6 pressure of the SF6 circuit breaker is lower than the blocking value, the dielectric strength and arc extinguishing ability of the SF6 circuit breaker will decrease, which poses a serious threat to the safe operation of the equipment.

Circuit breaker operating circuit, also known as circuit breaker control circuit, its function is to open and close the circuit breaker through the secondary circuit. When the SF6 pressure is lower than the blocking value, according to the "State Grid Corporation of Power Substation Operation and Maintenance Management Regulations" Part 2 circuit breaker operation and maintenance rules, the substation operation and maintenance personnel are required to immediately report to the on-duty control personnel and disconnect the SF6 circuit breaker operating power supply.

At present, when the SF6 pressure of the SF6 circuit breaker is lower than the blocking value, the power supply company sends substation operation and maintenance personnel to the site to disconnect the operating power of the SF6 circuit breaker, which consumes a lot of manpower and travel time to the substation. Turn on the SF6 circuit breaker to operate the power supply.

Utility model content

In order to save manpower and disconnect the operating power supply of the SF6 circuit breaker in time, the utility model provides a device for automatically disconnecting the operating power supply of the SF6 circuit breaker when the air pressure is low.

The technical solution adopted by the utility model to solve the technical problem is: the SF6 circuit breaker automatically disconnects the operating power supply device when the air pressure is low, including the device power supply, SF6 pressure gauge, microprocessor, controlled switch, operating circuit power supply, and circuit breaker operating circuit , device wires, signal wires, and operating circuit wires, which are characterized in that: the power supply of the device is connected to the SF6 pressure gauge, the microprocessor, and the controlled switch through the device wires, and the SF6 pressure gauge, the microprocessor, and the controlled switch are connected in sequence through the signal wires , the operation circuit power supply, the controlled switch, and the circuit breaker operation circuit are connected in sequence through the operation circuit wires.

The beneficial effect of the utility model is that the SF6 circuit breaker automatically disconnects the operating power supply device when the air pressure is low. When the SF6 pressure of the SF6 circuit breaker is lower than the blocking value, the SF6 circuit breaker operating power supply is automatically disconnected, which saves manpower and can disconnect the SF6 in time. The circuit breaker operates the power supply.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a structural schematic diagram of an SF6 circuit breaker with low air pressure and automatically disconnects the operating power supply device.

In the figure, 1——device power supply; 2——SF6 pressure gauge; 3——microprocessor; 4——controlled switch; 5——operating circuit power supply; 6——circuit breaker operating circuit; 7——device wire ; 8——signal line; 9——operation circuit wire.

Detailed ways

The following are specific embodiments of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model is not limited to these embodiments.

The SF6 circuit breaker automatically disconnects the operating power supply device when the air pressure is low, including the device power supply (1), SF6 pressure gauge (2), microprocessor (3), controlled switch (4), operating circuit power supply (5), and circuit breaker operation Circuit (6), device wire (7), signal wire (8), operation circuit wire (9), device power supply (1) are respectively connected to SF6 pressure gauge (2), microprocessor (3) through device wire (7) , the controlled switch (4), the SF6 pressure gauge (2), the microprocessor (3), and the controlled switch (4) are sequentially connected through the signal line (8), and the operation circuit power supply (5), the controlled switch (4) , The circuit breaker operating circuit (6) is sequentially connected through the operating circuit wire (9).

The device power supply (1) respectively provides working power for the SF6 pressure gauge (2), the microprocessor (3) and the controlled switch (4) through the device wire (7). The operating circuit power supply (5) provides operating power for the circuit breaker operating circuit (6) through the operating circuit wire (9) and the controlled switch (4).

Under normal circumstances, the controlled switch (4) is in the closing state. The controlled switch (4) is a normally closed switch, that is, a switch that is in a closed state without the action of an external force. When someone toggles the switch button or is toggled by an automatic device control switch, the switch is converted into an open state.

When the SF6 pressure gauge (2) of the SF6 circuit breaker indicates that it is lower than the blocking value, it sends a signal to the microprocessor (3), and the microprocessor (3) sends an opening signal to the controlled switch (4) after making a judgment , the controlled switch (4) is opened, and the operating circuit power supply (5) of the SF6 circuit breaker is disconnected, so that the circuit breaker operating circuit (6) is de-energized and the circuit breaker cannot be opened and closed.

When the SF6 pressure gauge (2) of the SF6 circuit breaker indicates that it is higher than the blocking value, it will not send a signal to the microprocessor (3), so that the microprocessor (3) will not send any signal to the controlled switch (4). The control switch (4) automatically returns to the closed state, so that the circuit breaker operating circuit (6) is charged and resumes the function of opening and closing the circuit breaker.

The specific embodiments described herein are only examples to illustrate the spirit of the present invention. Those skilled in the technical field to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the utility model or go beyond the appended claims defined range.

Although this article uses more device power supply (1), SF6 pressure gauge (2), microprocessor (3), controlled switch (4), operation circuit power supply (5), circuit breaker operation circuit (6), device Wire (7), signal wire (8), operation loop wire (9) and other terms, but the possibility of using other terms is not excluded. These terms are only used to describe and explain the essence of the utility model more conveniently, and interpreting them as any kind of additional limitation is contrary to the spirit of the utility model.

Claims (1)

1. The low automatic opening operation power supply device of 1.SF6 breaker air pressure, including installation's power source, SF6 pressure gauge, microprocessor, by Switch, operation circuit power supply, breaker operator circuit, device conducting wire, signal wire, operation circuit conducting wire are controlled, it is characterized in that: device Power supply is separately connected SF6 pressure gauge, microprocessor, controlled switch by device conducting wire, and SF6 pressure gauge, controlled is opened microprocessor Pass is sequentially connected by signal wire, and operation circuit power supply, controlled switch, breaker operator circuit pass through operation circuit conducting wire successively Connection.