Nominal voltage： DC 1500V
Control voltage: DC 110V（auxiliary contact）
Rated current： 1200A
Short-circuit current (non switching)： 30kA,20ms
Creepage distance: ≥40mm
electric clearance： ≥20mm
MDS1-1200/1500 metro high-voltage cut-off earthing switch is mainly used for connecting circuit formed by traction inverter and auxiliary inverter to coil-in DC power supply, and used for enabling high-voltage filter capacitor to discharge for safe routine maintenance in workshop. Under usual working condition, filter capacitor will discharge through such switch in accordance with train control means.