Isolating and earthing box

Isolating and Earthing Boxes isolate or connect to earth many HV circuit nodes to ensure maintenance safety. The isolating earthing switch is typically integrated inside a metal enclosure assembled underframe. The front panel, including the earthing switch lever and its locks, is protected by a cover.

The box is a flexible and reliable solution based on our long technical experience in the onboard applications.

  • Up to 18 earthing poles
  • High number of options
  • High electrical performance
  • Compliant to IEC60077-1/-2, IEC61373, EN45545 and UIC550 standards
Configuration Earthing Disconnection Switching Mixed Configuration Three position
Installation type Underframe in metal enclosure Underframe in metal enclosure Underframe in metal enclosure Underframe in metal enclosure
IP Protection IP56 IP56 IP56 IP56
Rated Operational Voltage [Vdc] 3000 3000 3000 3000
Rated Insulation Voltage @ OV3/PD3 [Vdc] 4800 4800 4800 4800
Conventional Free Air Thermal Current @75°C [A] 400 400 400 400
Rated Short Time Withstand Current (0.1 s) [kA] 50 50 50 50
2 Poles Earthing Module (insulated shaft) up to 12 poles - up to 6 modules in total -
3 poles Earthing Module (conductive shaft) up to 18 poles - Up to 6 Modules in Total -
Changeover Module (Insulated Shaft) - Up to 12 Poles Up to 6 Modules in Total -
Three Position Module (Conductive Shaft) - - - up to 12 poles
Safety Position Spring Yes Yes Yes Yes
Locking System up to 6 keys configurable in input/output up to 6 keys configurable in input/output up to 6 keys configurable in input/output up to 6 keys configurable in input/output
Type of Keys CISA, KABA or DOME CISA, KABA or DOME CISA, KABA or DOME CISA, KABA or DOME
Electromechanic Interlocking 2 Positions Option Option Option Option
Voltage Detection Light with LEDs Option Option Option Option
Lever Position Flag Option Option Option Option