High Voltage Clamp Current Transformer

Abstract

The invention relates to a high-voltage split-core type current transformer, which comprises a shell, a movable clamp arm, a seat hole, a sliding plate, a torsion spring and a stop bar, wherein at least the circuit of the current transformer is installed in the shell; the movable clamp arm is connected onto the shell through a hinge, and a line passing channel is formed between the movable clamp arm and a fixed clamp arm on the shell when the movable clamp arm turns to a closed state; the seat hole is provided with a circular entrance and a circular exit on the shell, the axis of the seat hole is vertical to the axis of the hinge, and a circumferential-surrounded groove is arranged in the inner wall near the entrance; the sliding plate is installed on the shell in a plane vertical to the axis of the seat hole and is provided with a lapping part, a release port and a triggering part; the torsion spring is installed on the shell, and the restoring force of the torsion spring forces the movable clamp arm to turn to the closed state; when the triggering part is positioned in the exit, one end of the torsion spring can be butted against the lapping part; when the triggering part is stressed to slide to the outer part of the exit, one end of the torsion spring is separated from the lapping part and is in a free state; the stop bar extends out from the movable clamp arm; when the movable clamp arm turns to a fully open state, the stop bar is positioned at one side of the axis of the seat hole; and when the movable clamp arm turns to a fully closed state, the stop bar is positioned at the other side of the axis of the seat hole. The high-voltage split-core type current transformer can be installed on or taken down from a high voltage cable through a high-voltage insulation operating bar.

Description

technical field [0001] The invention relates to a high-voltage power measuring tool, in particular, a high-voltage clamp current transformer for measuring the current of a high-voltage cable. Background technique [0002] An invention patent with the authorized announcement number CN101266263B discloses a power metering supervision system and a supervision method. The system includes an electric energy meter and a metering supervisory host, which respectively calculate the electric energy on the first side of the transformer and the electric energy on the second side. The metering supervisory host stores a threshold value and calculates the relative difference of the electric energy data on both sides of the transformer. When the relative difference is greater than An alarm message is generated when the threshold is reached, and the communication module can send the alarm message. The method includes installing an electric energy meter and a metering supervisory host on the...

AI Technical Summary

Problems solved by technology

Install or remove the high-voltage clamp-on current transformer on the high-voltage cable, which usually requires power failure or more complex live working methods and equipment

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