It mainly includes the following related equipment: neutral point disconnector, discharge gap, zinc oxide arrester and current transformer for measuring discharge current. In order to make the equipment layout beautiful and convenient, separate T-shaped or gate shaped supports can be manufactured for users on the basis of user equipment selection, and neutral point accessory equipment such as neutral point disconnector, discharge gap and arrester can be designed together, The secondary overvoltage maintainer of current transformer constitutes a set of combined equipment of neutral point accessories of voltage regulator which is conducive to on-site construction and installation.

Neutral grounding

It is different from protective grounding.

neutral point

Specifically

transformer

Low voltage terminal, three windings in Y-connection method

Connection point

After the neutral point is connected with the earth, it is called neutral point grounding, and its grounding resistance is not greater than 4 ohms. Protective grounding refers to electrical equipment

Shell

The connection with the earth is called protective grounding, and its grounding resistance is not greater than 4 ohms.

■ product use

The neutral point gap grounding maintenance installation of sh-500 voltage regulator is specially used for the neutral point of 110kV, 220kV, 330kV and 500kV power voltage regulator to complete two different operation modes of neutral point grounding operation or ungrounded operation of voltage regulator. The rod gap is an extremely uneven electric field, the discharge voltage is unstable and the dispersion is large, which determines its poor maintenance performance. The rod gap is an average electric field, the discharge voltage is stable, the dispersion is small, and the maintenance performance is good. It is easy to debug the ball gap on site, and users can debug it on site according to their own regional conditions; The tip of the rod gap is particularly difficult to align, so it is difficult to conduct on-site commissioning. The ball gap is made of stainless steel with silver plated appearance, high cost and high fixation requirements, so many manufacturers use rod gap to reduce cost, but do not consider the application effect.