Method for quickly searching grounding fault point of electrical equipment

Abstract

The invention discloses a method for quickly searching a grounding fault point of electrical equipment. An electrical circuit grounding fault quick tester is adopted in the method. The electrical circuit grounding fault quick tester is composed of such three parts as a converter, a signal operation box and a phase angle instrument, wherein a main circuit of the converter is connected with a circuit of the signal operation box and a circuit of the phase angle instrument, operations and control are carried out by a power switch, a start switch and an adjusting knob on an operation panel of the signal operation box, and variations in the position of a current transformer are detected by using the equipment to find the fault point. The method disclosed by the invention is mainly applied to searching fault points for large and medium-sized electrical equipment, a stator and a rotor of a turbogenerator, stators and rotors of various large and medium-sized motors, grounding faults of cables and overhead lines, and also to controlling circuits. Electrical equipment can differentiate each turn in each phase and can test current at each point, and has the advantages of simple and convenient operation, and ability of being quick and accurate. The method disclosed by the invention is applicable to fault point detection in using, manufacturing and mounting large and medium-sized electrical equipment.

Description

technical field [0001] The invention relates to a detection device for electrical faults, in particular to a detection device for electrical grounding fault points. technical background [0002] Electrical grounding is a common fault in electrical equipment. Since the resistance of large and medium-sized electrical equipment (such as generators, rotors, cables, overhead lines, etc.) is very small, which is equivalent to a conductor, the traditional bridge principle method and step voltage method cannot accurately locate the ground fault point. The fault point cannot be accurately located, the search time is long, and the damage to the equipment is great. During the flood season or peak power consumption period, the hydropower station may abandon water, the power generation of other power stations will be reduced, and the quality of important load products will be reduced or become waste products, causing great economic losses. [0003] In the Chinese patent database, there ...

AI Technical Summary

Problems solved by technology

Because the resistance of large and medium-sized electrical equipment (such as generators, rotors, cables, overhead lines, etc.) is very small, which is equivalent to a conductor, the traditional bridge principle method and step voltage method cannot accurately locate the ground fault point.

The fault point cannot be accurately located, the search time is long, and the damage to the equipment is great. During the flood season or peak power consumption period, the hydropower station may abandon water, reduce the power generation of other power stations, and reduce the quality of important load products or become waste products, causing great economic losses.

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