CN204597235U - Voltage switchgear Power transfer system - Google Patents

Abstract

The utility model relates to a complete switch cabinet power supply switching system, which includes a complete switch cabinet composed of at least two switch cabinets, each switch cabinet is equipped with an input power supply and an incoming line switch, and it also includes a relay for switching the input power supply. The input power is connected to the incoming switch through a relay. When one of the switch cabinets of this complete set of switch cabinet is powered off, the incoming line switch of this cabinet can still work normally.

Description

Complete switch cabinet power switching system

technical field

The utility model relates to the technical field of switch cabinets, in particular to a complete switch cabinet power switching system.

Background technique

A complete set of switch cabinets generally includes multiple switch cabinets, and each switch cabinet includes an input power supply and an incoming line switch. In the prior art, the operating power supply of the incoming line switch is generally taken from the input power of the cabinet, and the incoming line switch generally does not have a voltage loss trip. protection, so when the input power of one of the switch cabinets fails, the incoming line switch of this switch cabinet will not be automatically disconnected due to the disappearance of the operating power supply. At this time, the operator needs to manually complete the operation of disconnecting the incoming line switch. It is not very convenient to operate, and at the same time, the indicator light of the incoming line switch cannot be displayed because there is no power supply, which is prone to blind spots, which makes the operation of disconnecting the incoming line switch more inconvenient.

Contents of the invention

The technical problem to be solved by the utility model is to provide a complete switch cabinet power switching system in which the incoming switch of the cabinet can still work normally after one of the switch cabinets is powered off.

The technical scheme adopted by the utility model is: a complete switch cabinet power switching system, including a complete switch cabinet composed of at least two switch cabinets, each switch cabinet is equipped with an input power supply and an incoming line switch, and it also It includes a relay for switching the input power, and the input power is connected with the incoming switch through the relay.

Compared with the prior art by adopting the above structure, the utility model has the following advantages: in this way, as long as there is one switch cabinet in the complete set of switch cabinets, the input power supply is normal, and the incoming line switches in all the switch cabinets can be normal. Power on works normally, so the control is relatively simple, making the actual operation more convenient.

Preferably, the connection of the input power supply with the incoming switch through a relay means that the complete set of switch cabinets includes two switch cabinets, namely a first switch cabinet and a second switch cabinet, and the first switch cabinet includes a first input switch cabinet. The power supply and the first incoming line switch, the second switch cabinet includes the second input power supply and the second incoming line switch, the coil of the relay is connected to the first input power supply, and the normally open contact of the first input power supply and the relay The second input power supply is connected to the normally closed contact of the relay, and both the first incoming line switch and the second incoming line switch are connected to the common contact of the relay. In this way, when the first input power supply is normal, the relay coil is energized to work, the normally closed contact is disconnected, and the normally open contact is closed, that is, both the first incoming line switch and the second incoming line switch are connected to the first input power supply, Both the first incoming line switch and the second incoming line switch can work normally; when the first input power fails and the second input power works normally, and the relay coil is not powered, the normally closed contact is kept closed, and the normally open contact is closed. point is disconnected, then the first incoming line switch and the second incoming line switch are connected to the second input power supply at this time, so that the first incoming line switch and the second incoming line switch can still work normally, which can ensure multiple incoming line normal operation of the switch.

Description of drawings

Fig. 1 is a connection block diagram of the utility model complete switchgear power switching system.

Detailed ways

The utility model is further described below in conjunction with the accompanying drawings and specific embodiments, but the utility model is not limited to the following specific embodiments.

As shown in the figure: a complete switch cabinet power switching system, including a complete switch cabinet composed of at least two switch cabinets, each switch cabinet is equipped with an input power supply and an incoming line switch, and it also includes a switch for switching input The relay of the power supply, the input power is connected with the incoming switch through the relay.

The connection between the input power supply and the incoming switch through the relay means that the complete set of switch cabinets includes two switch cabinets, namely the first switch cabinet and the second switch cabinet, and the first switch cabinet includes the first input power supply and the second switch cabinet. An incoming line switch, the second switch cabinet includes a second input power supply and a second incoming line switch, the coil of the relay is connected to the first input power supply, and the first input power supply is connected to the normally open contact of the relay, so The second input power supply is connected to the normally closed contact of the relay, and both the first incoming line switch and the second incoming line switch are connected to the common contact of the relay. Both the first incoming line switch and the second incoming line switch are circuit breakers, and the relay is connected to the power module of the circuit breaker.

The working principle of this application is: when the first input power supply is working normally, both the first incoming line switch and the second incoming line switch are connected with the first input power supply, and maintain the normal working state of power on; when the first input power supply fails , the relay will switch the power supply, so that the first incoming line switch and the second incoming line switch are connected to the second input power supply, so that the first incoming line switch and the second incoming line switch can still maintain the normal working state of power, so that there is no The operator needs to manually control it.

Claims (2)

1. a voltage switchgear Power transfer system, comprise the voltage switchgear be made up of at least two each and every one switch cubicles, input power and service entrance switch is equipped with in each switch cubicle, it is characterized in that: it also comprises the relay for switching input power, and described input power is connected with service entrance switch by relay.

2. voltage switchgear Power transfer system according to claim 1, it is characterized in that: described input power to be connected with service entrance switch by relay and to refer to, described voltage switchgear comprises two switch cubicles, be respectively the first switch cubicle and second switch cabinet, described first switch cubicle comprises the first input power and the first service entrance switch, second switch cabinet comprises the second input power and the second service entrance switch, the coil of described relay is connected with the first input power, and described first input power is connected with the normally opened contact of relay, described second input power is connected with the normally-closed contact of relay, described first service entrance switch is all connected with the common of relay with the second service entrance switch.