Application
The series vacuum feed switch is used in three phases electric power circuit with AC 50Hz, rated voltage 1140V or 660V, rated current up to 630A, as usage of total distribute electricity switch or embranchment switch under coal mine. Thereinto 630A(500A) is used as feed switch in moving transformer substation (open behind cover board and connect with moving transformer substation), or as total distribute electricity switch embranchment switch, also can be used as big capacity motor infrequent starting. 
Product features
1.Main circuit uses vacuum breakers, electric close switch, automatically retain, with long-term life and less maintenance.
2.With function of protect overload, short-circuit, phase-failure, creepage action, creepage closedown, voltage-lost, voltage-absent.
3.LCD display, clear and intuitionistic.