Air-cooled automatic remote control device of transformer

Abstract

The invention provides an air-cooled automatic remote control device of a transformer, comprising an air-cooled controller body and a remote computer manipulation circuit (8); the air-cooled controller body comprises a dual power supply switching circuit (1), an automatic manual switching circuit (2), a temperature and load starting circuit (3), a standby motor starting circuit (4), a power supply monitoring circuit (5), a motor protection circuit (6) and a fan operation protection circuit (7); the remote computer manipulation circuit (8) is connected with the automatic manual switching circuit (2), the temperature and load starting circuit (3), the standby motor starting circuit (4) and the power supply monitoring circuit (5), and at least comprises two intermediate relays, wherein one intermediate relay has two normally open contacts while the other intermediate relay has one normally open contact and one normally closed contact, thereby reducing the cost.

Description

1. Technical field [0001] The invention relates to a transformer air-cooling automatic remote control device, in particular to a transformer air-cooling automatic remote control device suitable for the transformation of the original air-cooling control device of an old transformer. 2. Background technology [0002] During the operation of the transformer, in order to ensure the normal operation of the transformer, the transformer needs to be cooled, so the air cooling device of the transformer is an important auxiliary electrical component, and the automatic remote control device of the transformer air cooling is a necessary part of the transformer. There are three methods of cooling control: one is to automatically control the cooling equipment by temperature, the other is to control the cooling equipment by load current, and the third is to control the cooling equipment by manual handle; the electrical principle structures for realizing these three methods include tradition...

AI Technical Summary

Problems solved by technology

[0002] During the operation of the transformer, in order to ensure the normal operation of the transformer, the transformer needs to be cooled, so the air cooling device of the transformer is an important auxiliary electrical component, and the automatic remote control device of the transformer air cooling is a necessary part of the transformer. There are three methods of cooling control: one is to automatically control the cooling equipment by temperature, the other is to control the cooling equipment by load current, and the third is to control the cooling equipment by manual handle; the electrical principle structures for realizing these three methods include traditional relay type and Intelligent modular PLC; the traditional relay type is cheap, easy to maintain and low maintenance cost, but the performance is not as complete as the intelligent modular type; the intelligent modular type is expensive, the maintenance cost is higher, but the performance is more complete than the traditional relay type, and can cooperate with the computer use

[0003] Now, the degree of automation of power equipment is increasing day by day, and the requirements for automation of transformer air-cooling control are also getting higher and higher. Now new substations and most substations use microcomputer automation control. For the old traditional relay-type transformer air-cooling control The system cannot be used in conjunction with microcomputer automation control; the technical problem of how to combine the traditional relay type transformer air-cooled control with microcomputer automation control has not yet been resolved

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