A switch input circuit for relay protection tester

A technology of switch input and relay protection device, applied in the field of flat circuit, can solve the problems of damage of relay protection device, reduce the efficiency of work, etc., and achieve the effect of reducing external wiring
CN106788381BActive Publication Date: 2020-05-26XIANGTAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIANGTAN UNIV
Publication Date
2020-05-26

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Abstract

The invention discloses an on-off input circuit for a relay protection testing device. The circuit consists of a voltage stabilizing diode, a rectification bridge circuit, a photoelectric coupler circuit, a triode switching circuit, a filter capacitor and a voltage stabilizing reference power circuit. The on-off input circuit for the relay protection testing device is self-adaptive about various types of the input patterns, and the pre-configuration does not need to be executed; and the on-off input circuit for the relay protection testing device is self-adaptive about the polarity of the active input, even the reverse connection can be correctly identified, and the potential safety hazard cannot be caused by the polarity of the input. The on-off input circuit for the relay protection testing device is provided with the potential output, and is capable of providing the power for the high-speed output of the Darlington tube type, and reducing the external connections.
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Description

technical field

[0001] The invention relates to the field of flat circuits, in particular to a switching value input circuit of a relay protection tester. Background technique

[0002] In the power protection industry, relay protection devices are widely used and indispensable. Whether it is as small as some electric devices (such as generators, power supply lines), or as large as the entire power system, relay protection devices are required to provide fault warning signals, or directly and automatically control circuit breakers to issue trip instructions to ensure the safety of power equipment . Therefore, it is necessary to regularly overhaul and maintain the relay protection device.

[0003] The emergence of relay protection tester has brought great convenience for debugging relay protection devices. The relay protection tester has a binary input circuit, which can receive the binary output from the relay protection device and reflect its current state. In the field,...

Claims

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