Method of determining electrification of box transformer cable by adopting magnetic field coupling principle

Abstract

The invention relates to a method of determining electrification of a box transformer cable by adopting the magnetic field coupling principle. The method is characterized in that (1) an electricity-taking metal sensing slice is disposed on an outer surface of a high voltage box transformer cable insulation layer to form electromagnetic sensing connection; (2) the sensing charge acquired by the electricity-taking metal sensing slice can be led in a charging circuit by a protection circuit; (3) the charges stored in the charging circuit can be used to form trigger voltage; (4) the trigger voltage is used to start a switch circuit, and the electric energy stored in the charging circuit can flow in a light-emitting part, and the flickering of the light-emitting part can be used to prompt the electrification of the high voltage box transformer cable. The method is advantageous in that by adopting the electrostatic field generated by the high voltage cable, the sensing charge can be generated on the metal slice according to the capacitor sensing principle, and then the charges can be led in the circuit; when the charges are accumulated to a certain extent to generate the certain voltage, the capacitor can be used for the discharge, and then the light-emitting part of the discharge circuit can be turned on, and thereafter the user can determine the electrification of the cable, and therefore the safety and the reliability of the electricity testing working of the box transformer cable can be improved, the practicability is strong, and the high economic value is provided.

Description

technical field [0001] The invention relates to a method for judging the electrification of fully insulated high-voltage cables, in particular to a method for judging the electrification of box transformer cables by using the magnetic field coupling principle, and belongs to the field of electric equipment monitoring. Background technique [0002] The high-voltage live display device is a high-voltage switch equipment specified in the national standard. It is an essential device to prevent electrical misoperation. It is a prompt safety device that is directly installed on the electrical equipment and visually shows whether the electrical equipment has operating voltage. When the equipment has operating voltage, the light-emitting part of the device will flash to warn people that the high-voltage equipment is live, and there will be no indication when there is no electricity. There are two types of charging indicators currently on the market: contact and non-contact. The sig...

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Problems solved by technology

[0003] The invention discloses a method for judging the liveness of a box-type cable by using the magnetic field coupling principle, which can be applied to various cable heads (elbows, T-type cable joints and T-II-type cable joints) to measure electricity. Electrostatic field, the induced charge is obtained on the outer wall of the semi-conductive rubber sleeve. When the charge accumulates to a certain voltage, whether the light-emitting part is flickering is used to judge whether the cable is charged, which solves the problem that the existing charged indicator cannot determine whether the fully insulated equipment is electrified problem

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