Indoor cable inlet transformer winding short-circuiting device

Abstract

An indoor cable inlet transformer winding short-circuiting device comprises an insulation board, an insulation lever, a lead with low insulation strength, a short-circuit wire interface, and a hook. By adopting the indoor cable inlet transformer winding short-circuiting device provided by the invention, the workload of test personnel can be reduced, the wiring time can be reduced, the work efficiency can be improved, tested equipment can be put into operation in time, pollution caused by test wiring to the inside of a fuel tank and transformer accident caused by foreign matters left inside the fuel tank are avoided, and most importantly, fall-off of a high-voltage lead in the test process can be avoided, the safety of test personnel is ensured, and damage to the test equipment is avoided.

Description

technical field [0001] The invention belongs to the technical field of power system testing devices, in particular to an indoor cable incoming transformer winding short-circuit device. Background technique [0002] With the gradual increase in the number of indoor substations, the work of indoor transformer tests is also increasing. At present, indoor transformers generally adopt the way of cable entry. The joints of cables and transformer windings are located in the independent oil tank dedicated to the transformer. The oil tank shell is integrated with the transformer shell and grounded. During the test process, it is sometimes necessary to pressurize or ground the windings on each side after short-circuiting, especially when conducting the capacitance and dielectric loss tests of the windings and bushings, a high voltage of 10kV needs to be applied after the windings are short-circuited, because the short-circuit wires are generally insulated The strength is low, which r...

AI Technical Summary

Problems solved by technology

[0003] 1. Since the high-voltage and medium-voltage sides of indoor transformers generally have cable incoming lines, it is necessary to carry out the above hanging wire work when doing high- and medium-voltage windings and high- and medium-voltage bushing capacitance and dielectric loss tests, which will greatly Increase the workload of the test personnel and prolong the test time, which is not conducive to the timely commissioning of the equipment;

[0004] 2. When connecting the lead wires at the end of the transformer winding, since the joint of the winding is located deep in the independent oil tank, the tester needs to lean over and drill into the oil tank for wiring. Tools or other items carried by personnel fall into the oil tank and cause a vicious power failure of the transformer after the transformer is powered on;

[0005] 3. Temporary hoisting and fixing of the lead wires of the transformer winding with insulating tape is not reliable enough, and it is easy to cause the lead wires to fall off during the test, resulting in personal injury and equipment damage

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