Movable intelligent voltage sensor cart device

Abstract

The invention provides a moveable intelligent voltage sensor cart device. The device is characterized in that an intelligent voltage sensor module with an upper layer tube and a lower layer tube arranged in I shape is fixedly arranged in front side of a frame by a screw for integrative arrangement, and is fixed on a movable cart; a divider resistor is arranged in the upper layer tube, a front endof the divider resistor is equipped with a conductive connection rod, a rear end of the divider resistor is equipped with a discharge tube, and a lower copper current conducting rod is arranged in the lower layer tube; the conductive connection rod is electrically connected with the lower current conducting rod by a centrally embedded conductive copper rod between the upper layer tube and the lower layer tube, the upper layer tube and the lower layer tube are molded for integration by vacuum epoxy resin molding, front ends of the upper layer tube and the lower layer tube are respectively equipped with an upper layer plum blossom contact and a lower layer plum blossom contact. The device has the advantages of simple structure, integrated effect of the movable voltage sensor device, convenient mounting, stable performance, high mechanical reliability, and convenient overhaul, maintenance and management.

Description

technical field [0001] The invention relates to electric power equipment, more specifically a removable intelligent voltage sensor handcart device used in armored removable AC metal-enclosed switchgear with a voltage level of 40.5kV. Background technique [0002] In the power system, the AC metal-enclosed switchgear with a voltage level of 40.5kV is composed of four parts, namely, the control room, the cable room, the circuit breaker room and the busbar room, which play the role of receiving and distributing electric energy and controlling the circuit. and protection, the traditional voltage transformer is fixed in the cable room or installed on the floor-standing handcart, which is bulky and heavy, and there are certain safety hazards in maintenance operations. At the same time, the increase in connection accessories will inevitably cause Increase in equipment cost. [0003] Traditional electromagnetic current transformers CT and voltage transformers PT are used in power s...

AI Technical Summary

Problems solved by technology

[0004] 1. It is difficult to insulate, especially above 500kV, the volume, quality and price of the transformer are all increased due to insulation;

[0005] 2. The dynamic range is small, and when the current is large, the CT will appear saturated, which will affect the correct identification of faults by the secondary protection equipment;

[0006] 3. The output signal of the transformer cannot directly interface with the computerized measurement and protection equipment;

[0007] 4. It is easy to produce ferromagnetic resonance, etc.

[0021] At present, the intelligent voltage sensors are fixed inside the switchgear, which is obviously inconvenient for maintenance and cannot achieve the

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