Low Voltage 1140V Vacuum Circuit Breaker for Mining

Low voltage 1140V vacuum circuit breaker for miningSummaryOur ZK1 low voltage vacuum circuit breaker is suitable for AC 50Hz, rated voltage of 1140V and below, and rated current of 630A and below, as the main switch and branch switch of the power supply system. It can also be used for infrequent starting of large-capacity motors. And it is suitable for various protection devices to form various distribution switches, especially suitable for forming explosion-proof vacuum feeder switches in coal mines. Applying ambient conditions1. Ambient temperature: -5°C~+40°C;2. Atmospheric conditions: When the temperature is +40°C, the relative humidity is not more than 50%;3. Installation conditions: vertical installation, the inclination does not exceed 15°;4. Pollution degree three: installation category main circuit III, control circuit II;5. The height above sea level: