Overview
Isolation switch is a switching device that is mainly used for “isolating power supply, switching off operation, and connecting and cutting off small current circuits” without arc extinguishing function. When the isolating switch is in the open position, there is an insulation distance and an obvious disconnection mark between the contacts that meet the specified requirements; in the closed position, it can carry the current under normal circuit conditions and the current under abnormal conditions (such as short circuit) within the specified time. current switching device. It is generally used as a high-voltage isolating switch, that is, an isolating switch with a rated voltage of more than 1kV. Its own working principle and structure are relatively simple, but due to the large amount of use and high requirements for work reliability, the design, establishment and operation of substations and power plants are required. The impact on safe operation is greater. The main feature of the isolation switch is that it has no arc extinguishing ability, and can only divide and close the circuit without load current.
GN30 indoor high-voltage isolating switch is a new type of rotating contact knife type isolating switch. Realize the opening and closing of the switch.
GN30-12D type switch is the addition of grounding knife on the basis of GN30 type switch, which can meet the needs of different power systems. It is easy to install and adjust, and its performance meets the requirements of GB1985-89 “AC high-voltage isolating switch and grounding switch”. It is suitable for indoor power systems with rated voltage of 12 kV and AC 50Hz and below. circuit use. It can be used together with high-voltage switchgear, and can also be used alone.
Conditions Of Use
1. The altitude does not exceed 1000m;
2. Ambient air temperature: -10℃~+40℃;
3. Relative humidity: the daily average is not more than 95%, and the monthly average is not more than 90%;
4. Pollution level: places without serious dust, chemical corrosive and explosive substances;
5. Earthquake intensity: no more than 8 degrees; places without frequent violent vibrations.
