Relay protection current bridging device

Abstract

The invention relates to a relay protection current bridging device. The bridging device comprises two groups of parallelly connected insulation sleeves. A connection terminal is fixed in each insulation sleeve. The insulation sleeves correspond to the connection terminals fixed therein one by one and the insulation sleeves are connected with the connection terminals through wires. Each of the insulation sleeves is a semi-enclosed cavity sleeve with an opened lower end. A clamping block and a clamping groove are respectively arranged on / in opposite end faces of the outer wall of each insulation sleeve. Adjacent insulation sleeves are inserted into each other through the clamping blocks and the clamping grooves. The bridging device is simple in structure and easy to use on the spot, reliability of relay protection is improved, equipment failure rate is reduced, and the requirement for safety and stability of the grid of 220kV or over is largely met.

Description

technical field [0001] The present application relates to a relay protection current jumper used when a relay protection device under inspection shares a current transformer winding with other relay protection devices. Background technique [0002] As people's requirements for the safety and reliability of power systems are getting higher and higher, that is, the requirements for the four properties of relay protection are getting higher and higher. From the perspective of the reliability of secondary protection, protection devices, measuring devices, metering devices, and stability The control device and the fault recording device should use independent current transformer windings. The protection configuration has more and more requirements for the configuration number of current transformer windings, but too many configurations of current transformer windings will bring great problems to the design and manufacture. It is difficult and affects the reliability of the primar...

AI Technical Summary

Problems solved by technology

[0002] As people's requirements for the safety and reliability of power systems are getting higher and higher, that is, the requirements for the four properties of relay protection are getting higher and higher. From the perspective of the reliability of secondary protection, protection devices, measuring devices, metering devices, and stability The control device and the fault recording device should use independent current transformer windings. The protection configuration has more and more requirements for the configuration number of current transformer windings, but too many configurations of current transformer windings will bring great problems to the design and manufacture. Difficult, and affect the reliability of primary equipment, comprehensively consider that some relay protection devices share the current transformer winding

For a long time, one method of testing other operating protective devices connected in series after the current circuit of the tested protective device is to use the experimental power line to bridge one by one. When the current of the running protection device disappears, and the wires are easy to be entangled, it increases the danger and the probability of accidental touch for the maintenance personnel.

Another method is to use hard wires to bridge phase by phase and fasten them with screws. This method is reliable and the wires are not easily entangled, but it also increases the danger and the probability of accidental contact for maintenance personnel.

The jumper is unreliable and not firm, and a wrong touch will cause incalculable economic losses and negative impacts on the power grid

Images