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Portable multi-functional serial crosstalk detector

A multi-functional, detector technology, applied in the direction of instruments, measuring electricity, measuring devices, etc., can solve the problems of dense secondary wiring, affecting normal power transmission, and no readings, etc., to improve work efficiency, carry accurate and reliable, and easy to break effect of position

Active Publication Date: 2012-08-15
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Infrastructure substations have the problem of AC and DC hybrid connections, especially in 500kV ultra-high voltage substations. There are many secondary cables in the protection screen cabinet, terminal box and control cabinet, and the secondary wiring on the terminal block is densely packed. Large, and especially important, a slight negligence will affect the normal power transmission and bring hidden dangers to the stability of the power grid
The current method of checking and dealing with AC-DC hybrid connections is to use secondary drawings to check the lines on the drawings, which is time-consuming and laborious
[0003] When measuring with a multimeter, there are also problems with the mixed use of AC and DC voltage files: (1) When measuring DC voltage with AC voltage files, the voltmeter may have no reading or be twice as high as the actual DC voltage. The specific error is half-wave with the rectification in the meter or full wave
(2) Measure the AC voltage with the DC voltage range. Due to the frequency, it will affect the swing rate of the pointer. Long-term use will cause damage to the multimeter.

Method used

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  • Portable multi-functional serial crosstalk detector
  • Portable multi-functional serial crosstalk detector
  • Portable multi-functional serial crosstalk detector

Examples

Experimental program
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Effect test

Embodiment 1

[0024] Embodiment 1 (only comprising the non-contact electrometry unit, see figure 1 , figure 2 , Figure 5 with Image 6 ):

[0025] The present embodiment includes a housing 4 and a non-contact electric test unit; the non-contact electric test unit includes a pair of electromagnetic induction sheets 1, 2, an AC voltage amplifier, a drive and sound and light alarm circuit, a single-pole three-throw switch SA and Battery E; one end of the pair of electromagnetic induction sheets 1, 2 is connected in parallel to the input end of the AC voltage amplifier, the output end of the AC voltage amplifier is connected to the input end of the drive and sound and light alarm circuit, and the battery E The single-pole three-throw switch SA is respectively connected to the power supply end of the AC voltage amplifier and the drive and sound and light alarm circuit.

[0026] The structure of the pair of electromagnetic induction sheets 1 and 2 is the same, and both are copper sheets of ...

Embodiment 2

[0037] Embodiment 2 (both comprising the non-contact electric test unit and the contact electric test unit, see Figure 1-6 ):

[0038] The difference between embodiment 2 and embodiment 1 is that it also includes a contact-type electric test unit, which includes a screwdriver sensor 3, a rectifier circuit, the first to third amplification and light alarm circuits, and a button switch SB;

[0039] The rear end of the metal rod of the screwdriver sensor 3 is connected to the input end of the rectification circuit, and the output ends of the rectification circuit are respectively connected to the input ends of the first to third amplifier light alarm circuits. Connect to the power supply terminals of the first to third amplification and light alarm circuits.

[0040] The screwdriver sensor 3 is a "one" or "ten" screwdriver; the metal rod rear end of the screwdriver.

[0041] The first to third amplification and light alarm circuits are composed of transistors VT4-VT6, potentio...

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PUM

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Abstract

The invention relates to a portable multi-functional serial crosstalk detector, which is suitable for detecting a failure of alternating and direct current hybrid junction of a transformer substation. The portable multi-functional serial crosstalk detector comprises a shell and a non-contact electricity testing unit; the non-contact electricity testing unit comprises a pair of electromagnetic induction sheets, an alternating current voltage amplifier, a driving and acousto-optic alarm circuit, a single-pole triple-throw switch SA and a battery E; one end of the pair of electromagnetic induction sheets is connected to an input end of the alternating current voltage amplifier in parallel; an output end of the alternating current voltage amplifier is connected with an input end of the driving and acousto-optic alarm circuit; and the battery E is connected to power ends of the alternating current voltage amplifier and the driving and acousto-optic alarm circuit through the single-pole triple-throw switch SA respectively. The portable multi-functional serial crosstalk detector has the advantages of high sensitivity, easiness for operation, convenience for carrying, accuracy and reliability.

Description

technical field [0001] The invention relates to a portable multi-function serial current detector, which is suitable for detecting faults of alternating current and direct current hybrid connections in substations. Background technique [0002] Infrastructure substations have the problem of AC and DC hybrid connections, especially in 500kV ultra-high voltage substations. There are many secondary cables in the protection screen cabinet, terminal box and control cabinet, and the secondary wiring on the terminal block is densely packed. Large, and especially important, a slight negligence will affect the normal power transmission and bring hidden dangers to the stability of the power grid. The current method of checking and processing the mixed connection of AC and DC uses secondary drawings to check the lines on the drawings, which is time-consuming and laborious. [0003] When measuring with a multimeter, there are also problems with the mixed use of AC and DC voltage files:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02G01R19/00
Inventor 杨博涛
Owner STATE GRID CORP OF CHINA