Overview
JN15-12 high-voltage grounding switch is used for indoor 3~12KV three-phase AC 50Hz power system and various high-voltage switch cabinets. It can also be used as grounding maintenance for high-voltage electrical equipment. The grounding switch has the advantages of simple and compact structure, light weight, flexible operation, convenient installation and good dynamic and thermal stability.
The performance of JN15-12 indoor high-voltage grounding switch meets the requirements of GB1985-85 “AC high-voltage partition switch and grounding switch” and IEC129. Applicable to 12kV and below AC 50Hz power system. It can be used with various models of high voltage. The switchgear together is used for earth protection.
Features
1. Main structure: The grounding switch consists of a bracket, a grounding knife assembly, a static contact, a sensor, a shaft, an arm, a compression spring, a conductive sleeve, and a soft connection.
2. Working principle: When the operating mechanism operates the closing grounding switch, it acts as a torque to make the main shaft overcome the resistance torque and drive the crank arm to rotate in the closing direction, so that the joystick grounding knife passes through the dead point of the compression spring, and the compression spring releases energy to make the grounding The switch closes quickly and is in the closed position. The grounding knife on the grounding knife assembly is in firm and reliable contact with the flange part of the static contact through the disc spring. During the opening operation, the acting torque makes the main shaft overcome the main torque and the spring force, and drives the arm to rotate in the opening direction, so that the grounding knife compression spring passes through the dead point, and the compression spring ends the energy storage, ready for the next closing. The grounding switch and closing speed are independent of the speed of human operation.
Conditions Of Use
Environmental conditions: Altitude: ≤1000m;
Ambient temperature: -25°C~+40°C;
Earthquake intensity: ≤8 degrees;
Relative humidity: daily average ≤95%, monthly average ≤90%.
Pollution degree: Ⅱ
