Temporary power supply wiring device of transformer on-load tap switch

Abstract

The invention provides a temporary power supply wiring device of a transformer on-load tap switch. The temporary power supply wiring device comprises a box body and a cable reel arranged in the box body and provided with a three-phase socket. A handle is arranged on a wheel disc and is located outside the box body, and one end of the handle is fixed to the wheel disc. A cable wound on the wheel disc of the cable reel is a three-phase quadded cable. Four output power supply binding posts are arranged on a top wall insulating panel of the box body. A three-phase four-core plug matched with the three-phase four-core socket for usage is arranged in the box body. The four output power supply binding posts are electrically connected with corresponding leading-out terminals of the three-phase four-core plug. An operating door is arranged on the side wall of the box body. A first control switch is arranged between three connected binding posts of the four output power supply binding posts and the three-phase four-core plug. A leading-out terminal of the first control switch is provided with at least one single-phase socket and / at least a pair of single-phase binding posts. The labor intensity of testers can be reduced, the testing efficiency of the tester is improved, and the convenience of field wire arrangement can be also improved.

Description

technical field [0001] The invention relates to the field of transformer power supply, in particular to a temporary power connection device for a transformer on-load tap changer. Background technique [0002] The on-load tap-changer is the only moving part connected to the transformer circuit. When performing the DC resistance test of the main transformer, it is necessary to electrically adjust the on-load tap-changer to complete the DC resistance test of all tap positions of the transformer. However, some substations have only one main transformer. When the main transformer fails, the AC power supply in the substation is lost, so it can only rely on temporary power supply, such as a three-phase alternator for temporary power supply. [0003] However, in the prior art, there is no good wiring device for connecting the on-load tap changer and the temporary power supply. In view of the cumbersomeness and inconvenience of on-site wiring, the relevant staff usually use the meth...

AI Technical Summary

Problems solved by technology

In view of the cumbersomeness and inconvenience of on-site wiring, the relevant staff usually use the method of manually adjusting the on-load tap-changer, and manually adjusting the tap-changing position of the tap-changer will not only increase the labor intensity of the test personnel, but also greatly reduce The test efficiency of the test personnel increases the power outage time of the transformer, which greatly reduces the reliability of power supply

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