DC Change-Over Switches STU/STP

STU / STP change-over switches are devices installed in stationary substations. They are used for switching-over the no-load circuits. The power contact position indication is placed on the front plate. The drive can be both manual and motor one. From the viewpoint of safety and prevention of unintended switching they are equipped with locks which lock the position and manual operation.












Scheme of the possible positions of power contact STU / STP

Schéma přepojovačů

Nominal voltage
  • 750VDC / 1500VDC / 3000VDC
Nominal current
  • 1000A / 2000A / 4000A / 6300A
Number of poles
  • 1 / 2 / 3
Version
  • manual (position locking according to customer requirement) 
  • motorized (position locking according to customer requirement) 
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