Three-pin reed switch type double-circuit trip node gas relay

Abstract

The invention relates to the technical field of a relay, and in particular to a three-pin reed switch type double-circuit trip node gas relay which is applicable for a gas relay on electrical apparatuses such as an operating transformer or a tapping switch. The gas relay comprises a reed switch and a floater, a heavy gas protection device and a slight gas protection device are arranged in a shell of the gas relay, transformer oil is arranged in an oil pipeline in the shell, and a side inlet is arranged on the shell. On the basis of the conventional gas relay, a contact type reed switch with three metal reeds is used as a signal output node, an alarm or trip signal sent by mistake due to poor insulation outside pins can be effectively prevented, outside interference is reduced, protection reliability is enhanced, and a fault due to oil leakage of the transformer or a fault inside the transformer can be rapidly distinguished. The three-pin reed switch type double-circuit trip node gas relay has the characteristics of high insulativity of a secondary circuit, and safe and reliable use; the three-pin reed switch type double-circuit trip node gas relay is capable of avoiding false operation of the contact, is simple and reasonable in structure, obvious in effect, and is beneficial to promotion and application.

Description

technical field [0001] The invention relates to the technical field of relays, in particular to a three-pin reed switch type double-circuit tripping node gas relay, which is suitable for the gas relay on power equipment such as transformers or tap switches in operation. Background technique [0002] Gas relay, also known as gas relay, is a relay that operates by using the gas generated when the transformer internal fault occurs. Its structure is simple and its sensitivity is high, especially when there is an inter-turn short circuit in the place where the number of turns of the transformer winding is small, the internal fault circuit current is very large, which may cause local severe overheating, but the current change reflected on the external lead wire is small, which means Sometimes even highly sensitive differential protection cannot guarantee reliable operation, but the gas relay can respond sensitively to this type of fault. Therefore, the gas relay is still one of t...

AI Technical Summary

Problems solved by technology

The reduction of the insulation strength of the terminals of the gas relay can easily cause the main transformer to be tripped by mistake due to the short connection of the lead wire of the reed switch, which brings great hidden dangers to the reliable, safe and stable operation of the power grid

[0005] The existing gas relay cannot distinguish whether the transformer trip is caused by the oil leakage defect of the transformer or the internal fault of the transformer when the heavy gas relay operates. In this way, when the heavy gas protection needs to be changed to the signal in some specific cases, both will be lost at the same time. Protect

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