Disconnector cubicle

The disconnector cubicles are installed in the traction substation. Incoming cubicles are situated between the transformer-rectifier group and the feeders, the cubicle will cut both the negative and the positive poles. When the substation is equipped with a rectifier circuit breaker, the disconnector cubicle will, in this case, cut only one pole. The negative cubicle can contain from 1 to 3 single pole disconnectors.
Basic functions:   The elements included in this cubicle vary from project to project, but usually include the following items: Motorized or manual disconnectors (uni- of bi-polar), off load operation, electrical interlocking function with the HSCB feeder.  System bus-bar. Measurement of current and/or voltage.
Protection functions   Ground fault protection (device 64)  Negative-earth over-voltage protection Return current protection (device 32) Stray current collection     Measuring and displaying   Current measurement Current display Voltage measurement Voltage display
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