KONČAR - Medium Voltage Apparatus Inc. last update 10.01.2010.
Hr En Py


KSMA Series


metal enclosed, SF6 gas-insulated

Compact modules series KSMA are intended for design of various compact, metal enclosed switchgear variants. All live parts are placed in SF6 gas-insulated steel containers, which provide mutual insulation of current path elements, as well as insulation to the earth level potential. The electric arc quenching takes place in vacuum interrupters built in circuit breakers and load break switches. SF6 gas is not used as arc-quenching medium, which provides complete environmental acceptability of this product and eliminates operational maintenance of the primary circuits.

Busbar and cable connections between the modules are performed by insulated busbars or cables with plug-on connectors according to IEC 60502 and DIN 47636 standards. Besides the obligatory manual drive, compact modules series KSMA are equipped with motor drive and set of releases for remote control of each device. This feature enables complete automatization of these switchgear type.

Compact modules series KSMA are built for indoor installation at normal service conditions, in accordance with IEC 62271-200. Nominal parameters of these modules have been confirmed by adequate certificates.


  • Vacuum circuit breaker
  • Three-positional vacuum load break switch
  • Three-positional or two-positional disconnector
  • Earthing device behind vacuum circuit breaker
  • Combi-sensors or current transformers in accordance with customer’s request
  • Protection module in accordance with customer’s request


Rated voltagekV2438
Rated power frequency withstand voltage 50Hz/1min.kV5070
Rated lightning impulse voltage 1,2/50 skV120170
Rated busbar current - up to...A25002500
Rated breaking capacity, modules with circuit breaker - up to...kA2525
Rated making capacity, modules with circuit breaker - do...kA6363
Rated short time withstand current 3 s - up to...kA2525
Switch-off time (short circuit)ms4545
Rated current, modules with 3-positional load break switchA630/1250630/1250
Short time withstand current, modules with 3-positional lbskA16(25)16(25)
Rated disconnector current (transformer feeders)kA2500630