Loaded tapping switch temperature sensing device

Abstract

The invention provides a loaded tapping switch temperature sensing device, which comprises a metal substrate, wherein the metal substrate is provided with at least two recesses; the bottoms of the recesses are provided with luminous sources; liquid crystal ink coatings are formed above the luminous sources at the bottoms of the recesses; light-gathering covers are arranged on the ports of the recesses; one side of each light-gathering cover is in leak-proof fit with the corresponding recess; the other side of each light-gathering cover is provided with an optical fiber interface; and the optical fiber interfaces are optically connected with a light receiving head of a color analyzer on the outer side of a loaded tapping switch through optical fibers. In the entire temperature sensing device, precision electric equipment is not used in a tapping switch oil chamber, so that very high working stability is realized.

Description

technical field [0001] The invention relates to the field of monitoring devices for transformer equipment, in particular to a temperature sensing device for an on-load tap changer. Background technique [0002] The grid voltage changes with the operation mode and load size, in order to improve the voltage quality. The transformer can have a rated output voltage, usually by changing the position of a winding tap tap to achieve voltage regulation, the device that connects and switches the tap position is called a tap changer, which is adjusted by changing the number of turns of the transformer winding Change, change the voltage by adjusting the transformation ratio, and adjust the voltage. On-load voltage regulation means not disconnecting the power supply, so that the transformer can adjust the tap changer with load under normal working conditions. Its principle is that when the moving contact of the switch has not completely left from the first gear, the transition circuit...

AI Technical Summary

Problems solved by technology

[0003] Since the on-load tap-changer works in a high-voltage environment, its contacts, transition resistors and other components will generate relatively high heat, so the on-load tap-changer has corresponding cooling equipment when the temperature of the on-load tap-changer is high. , to cool it down, the ordinary cooling device adopts the temperature probe of electrical structure in the high electromagnetic and high heat environment of the load tap oil chamber, because the temperature probe is a relatively precise electrical device, it will be affected by electromagnetic interference and high temperature , so the work stability is not high and it is easy to break down

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