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:
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