A 400-volt open-type current transformer assembly

Abstract

The invention discloses a 400 volt open type current transformer assembly. A P1 phase current loop wire, a P2 phase current loop wire and a voltage loop wire in a low voltage current transformer are led out respectively through a wiring phase separation lead-out device, the P1 phase current loop wire, the P2 phase current loop wire and the voltage loop wire are connected with a copper rod to forman integral bus of a measuring loop, then the bus is connected with a bus plug through a phase separation connection device, the cross connection problem of phase voltage and phase current is avoided,meanwhile the position relationship of phase current wire is clear, P1 and P2 wiring errors are effectively prevented, and thus the low voltage current transformer is easy to install and convenient to maintain. When an external-connection current lead-out wire of the low voltage current transformer is pulled out, a short-connection metal contact makes phase separation holes of a current loop short connected mutually, and thus secondary current of the current transformer is in a short-connection state in a charged state.

Description

technical field [0001] The invention relates to a 400-volt open-type current transformer assembly used in the field of electric power engineering. Background technique [0002] When the low-voltage current transformer is installed with the metering circuit, the external lead wires are divided into P1 phase current loop wiring, P2 phase current loop wiring and voltage loop wiring. For any one of a group of three low-voltage current transformers, its P1 phase The current loop wiring needs to form a loop with the P2 phase current loop wiring, and the voltage loop wiring also needs to be accurately connected according to the determined current phase. The existing technology mainly uses screw fastening terminals to connect the lead-out lines of a group of three low-voltage current transformers, and lead out the three-phase voltage wiring. Such an installation method has the disadvantages of easy wrong wiring polarity and messy wiring layout. Phenomenon, voltage wiring and second...

AI Technical Summary

Problems solved by technology

The existing technology mainly uses screw fastening terminals to connect the lead-out lines of a group of three low-voltage current transformers, and lead out the three-phase voltage wiring. Such an installation method has the disadvantages of easy wrong wiring polarity and messy wiring layout. Phenomenon, voltage wiring and secondary current circuit cross-phase wiring and other problems, which lead to cumbersome installation of low-voltage current transformers, easy wrong wiring, and live work cannot be performed

Images