DC Disconnectors STOL

STOL disconnectors are devices which are installed in stationary substations. They are used for no-load switching of electrical circuits. They are controlled either manually, with possibility of electromagnetic blocking of end positions, or by a motor unit with emergency control by a crank handle. The disconnector status is signalled by auxiliary contacts. Modular design of the STOL disconnector enables various versions.

Nominal voltage
  • 750VDC / 1500VDC / 3000VDC
Nominal current
  • 1000A / 2000A / 4000A / 6300A / 10000A / 12000A
Number of poles 
  • 1 / 2 / 3
Version
  • manual
  • manual with magnetic blocking
  • motorized
Control voltage
  • 24 / 48 / 60 / 110 / 220VDC / 230VAC / 3x400VAC
Ambient temperature
  • -25° - + 40°C
Number of auxiliary contacts
  • 0 / 2 / 4 / 6 / 8
Overvoltage class
  • OV4
Pollution degree
  • PD4
Degree of protection
  • IP00
Mechanical lifetime
  • motorized version  - 100 000 cycles
  • manual version  - 20 000 cycles
According to standards
  • EN 50123
  • EN 50328