Relay protection device pressure plate outlet logic detection device
A relay protection device, logic detection technology, applied in the direction of measurement device, electronic circuit test, measurement of electricity, etc., can solve the problem of time-consuming and laborious, the relay protection test bench is not suitable for measuring the voltage board, etc., to prevent damage and shorten the Check the pre-test time and avoid the effect of protective action
Active Publication Date: 2016-12-28
STATE GRID CORP OF CHINA +1
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Problems solved by technology
Therefore, the conventional relay protection test bench is not suitable for measuring the output pulse of the voltage plate. In normal work, the time-consuming and laborious manual hand-held multimeter is generally used to detect the outlet of the pressure plate.
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[0016] Depend on Figure 1-3 It can be seen from the described embodiments that this embodiment consists of a ms-level instantaneous voltage pulse detection circuit for the outlet pressure plate of the relay protection device, a dry contact state detection circuit for the relay protection test bench, a microprocessor, a drive, a timing display and an audible and visual alarm circuit and It consists of a power supply indicator and a ground disconnection indicator circuit; the output terminals of the relay protection device outlet pressure plate ms-level instantaneous voltage pulse detection circuit and the relay protection test bench dry contact state detection circuit are respectively connected to the corresponding input terminals of the microprocessor. The output terminal of the microprocessor is connected to the input terminal of the drive, timing display and sound and light alarm circuit; the input terminal of the power indicator and ground disconnection indicator circuit is...
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The invention relates to a relay protection device pressboard outlet logic detection apparatus. The logic detection apparatus comprises a relay protection device outlet pressboard ms-level instantaneous voltage impulse detection circuit, a relay protection test-stand dry contact state detection circuit, a microprocessor, a drive, timing display and sound-light alarm circuit and a power indication and grounding disconnection indication circuit, wherein the output terminals of the relay protection device outlet pressboard ms-level instantaneous voltage impulse detection circuit and the relay protection test-stand dry contact state detection circuit are connected with corresponding input terminals of the microprocessor respectively; the output terminal of the microprocessor is connected with the input terminal of the drive, timing display and sound-light alarm circuit; the input terminal of the power indication and grounding disconnection indication circuit is connected with the output terminal of the drive, timing display and sound-light alarm circuit. The advantages of the logic detection apparatus are that: detection accuracy and sensitivity are high, and wiring and operation are simple.
Description
technical field [0001] The invention relates to a logical detection device for the outlet of a pressing plate of a relay protection device. Background technique [0002] At present, when the relay protection major conducts the acceptance and all inspection work of the relay protection device, the exit logic detection of the relay protection device pressure plate is an important and cumbersome content. Especially for the protection equipment of 500kV main transformer, it is faced with the grounding distance, phase-to-phase impedance, zero-sequence direction, and zero-sequence overcurrent of the four parts of the high, medium and low voltage sides and the common winding. The backup protection of each principle of each side The protection is divided into three sections I, II, and III, and each section is divided into three time limits of 1, 2, and 3, which constitute the trip matrix logic of the main transformer protection. Due to the dual configuration of relay protection, on...
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IPC IPC(8): G01R31/00G01R31/28
Inventor 杨博涛郑小江施凤祥刘海锋王永红刘辉
Owner STATE GRID CORP OF CHINA