KONČAR - Medium Voltage Apparatus Inc. last update 10.01.2010.
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RSn Series


for indoor installation

Disconnector switches are part of traditional medium voltage assortment. They have been designed and manufactured in accordance with IEC 62271 – 103 (2003). Disconnector switch is an apparatus which is capable of closing and breaking load currents up to rated current level, at cosφ = 0,7, as well as currents of off-load transformers, cables and overhead lines and closed loop currents. Under fault conditions the disconnector switch can carry the short circuit current for a considerable short time, but it is not capable of breaking it. The disconnector switch in series with HRC fuses can break the short circuit current, where blown fuse in any phase automatically causes three-pole tripping of the disconnector switch.

In open position the disconnector switch provides required visible insulating distance between contacts. This feature enables the use of disconnector switch at the network points where visible insulating distance is required. In these cases the disconnector switch can take over all nominal current breaking operations which would otherwise require the circuit breaker. Fuse-switch combination also successfully replaces the combination of circuit breaker – disconnector at the network points where rapid auto-reclosure is not required.



Disconnector switch has the following basic characteristics:
  • small dimensions, due to linear contact movement
  • quick arc quenching and high switching capability, due to two serial breaking points in each pole, as well as gas-generating insulating material in quenching cambers
  • high availability and reliability, due to simple construction and quality of material
  • minimal maintenance
  • disconnector switches can be equipped with earthing blades and HRC fuses; auxiliary switches
  • at disconnector switches with spring charging-energy storing mechanism the tripping release can be fitted
Disconnector switches series RSN are manufactured in following versions:
  • version n – for back cell wall installation
  • version b – for lateral cell wall installation
  • version s – for front cell wall installation
Earthing blades can be fitted to any of the versions listed above, at upper or lower side.


Nominal data RSn 12RSn 24
Rated voltagekV1224
Rated frequencyHz5050
Rated power freq. withstand voltage to the earth and between poles (50 Hz)kV2850
Rated impulse withstand voltage to the earth and between poles (1,2/50 μs)kV75125
Rated impulse withstand voltage across insulating distance (1,2/50 μs)kV85145
Rated currentA630630
Rated breaking capacity at cosφ>0,75A400400
Breaking current of off-load transformerA107
Rated making capacity (ampl.)kA506
Short time withstand current, 1 s (Eff.)kA2016
Rated peak withstand current (ampl.)kA5040