Fault alarm circuit for detection bridge of DC insulating monitoring device

Fault alarm circuit for detection bridge of DC insulating monitoring device

The utility model relates to an on-line monitoring device for power equipment, especially a fault alarm circuit for the fault monitoring of a detection bridge of a DC insulating monitoring device of a transformer station. The principle of electric current measurement is employed for a DC positive el...

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Hauptverfasser: LIANG SHIJING, CHEN MEI, DONG JIADU, YANG HONGSONG, WANG ZHENFENG
Format: Patent
Sprache:eng
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MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator LIANG SHIJING
CHEN MEI
DONG JIADU
YANG HONGSONG
WANG ZHENFENG
description The utility model relates to an on-line monitoring device for power equipment, especially a fault alarm circuit for the fault monitoring of a detection bridge of a DC insulating monitoring device of a transformer station. The principle of electric current measurement is employed for a DC positive electrode grounding detection bridge and a negative grounding detection bridge, and the circuit is additionally provided with a current sensor and a photoelectric coupler. Through the judgment of a measurement signal of the photoelectric coupler and an induction signal of the current sensor, the integrity of the bridge of the insulating monitoring device of a DC system under the condition that the DC system is grounded. If an open-circuit and short circuit fault happening to a detect bridge is detected, an alarm can be given, thereby guaranteeing the monitoring of the reliability of the DC insulating monitoring device.
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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title Fault alarm circuit for detection bridge of DC insulating monitoring device
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