Rotoblok RCW

Switchgear Rotoblok RCW type metal-enclosed air insulated, two-piece, metal enclosure provides reliable power. The structure is characterized by small dimensions and full safety of use of arc-proof.

Technical description

Rozdzielnica Rotoblok RCW The Rotoblok RCW switchgear is a two-part, indoor switchgear in a zinc galvanized steel cubicle, with a single, air insulated primary busbar system. The switchgears are composed of single bays with different equipment based on withdrawable circuit breakers and VB-4W type vacuum circuit breakers, manufactured by ZPUE or another manufacturer. A mechanical interlock system and electric interlocks, configured according to the customer’s needs, assure a high level of safety, preventing incorrect switching procedures or opening of the bay door before switching off the power supply and closing the grounding switch.
The safety interlock system prevents incorrect switching procedures and the opening of the distribution bay door before switching off the power supply and closing the grounding switch.


Distribution bays have the following properties:

  • withdrawable circuit breakers allow switching to the OPEN and TEST positions when the bay door is closed,
  • small bay dimensions, which save space inside the switchgear,
  • isolation and metal partitions, which separate energized parts from other areas of the bay,
  • high corrosion resistance thanks to galvanized and powder-coated steel sheet construction,
  • a wide range of protection and control apparatus, which allows remote control of the switchgear,
  • arc-proof design,
  • easy switchgear cubicle expansion with other bays.

Basic technical data

Compliance with standards:
Switchgear type Rotoblok RCW meets the requirements of the following standards:

  • PN-EN62271-1 - “High Voltage Switchgear and Controlgear – Part 1: Common specifications”,
  • PN-EN 62271-200 -“High Voltage Switchgear and Controlgear – Part 200: Altering current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV”,
  • PN-EN 62271-100 - “High Voltage Switchgear and Controlgear – Part 100: Alternating current circuit breakers”,

Certified by the Electrotechnical Institute.

Technical data
Nominal grid voltage 15 kV
Highest apparatus voltage 17,5 kV
Rated frequency/number of phases 50 Hz / 3
Rated power frequency withstand voltage 42 kV / 48 kV
Rated lightning impulse withstand voltage 1,2/50 µs 95 kV / 110 kV
Rated continuous current 630-1250 A
Rated short-time withstand current up to 25 kA (3s)
Rated peak current strength up to 63 kA
Internal arcing class up to 16 kA (1s); up to 25 kA (0,5s)
Degree of protection IP 4X
Service conditions:
Ambient temperature Relative humidity
- short-time maximum+40oC
- maximum daily average95%
- maximum daily average+35oC
- maximum monthly average90%
- maximum yearly average+20oC
- maximum daily average of vapour pressure2,2kPa
- lowest prolonged+25oC1)
- maximum monthly average of vapour pressure1,8kPa
Atmosphere in installation location
no significant salt, steam, dust, smoke,
flammable or corrosive gases pollution,
and no icing, frost and dew
Installation altitude
up to 1000 meters above sea level2)
vibrations caused by external causes
or earthquakes are not taken into account


  1. - Unless the control-metering and protection unit manufacturer has stated otherwise.
  2. - If the mounting altitude of the switchgear cubicle is higher than 1000 meters above sea level, the level of the switchgear insulation should be adjusted using an indicator compliant to 2.2.1 paragraph regulations of the PN-EN 62271-1 standard.

Available bays

Cross section and dimensions


Rotoblok RCW przekroj boczny i gabaryty

  1. Withdrawable circuit breaker
  2. Protection assembly
  3. Auxiliary circuitry compartment
  4. Auxiliary circuitry cable tray
  5. Safety hatch
  6. Isolator bushing
  7. Tulip-shaped contact
  8. Fixed contact
  9. Support insulator
  10. Isolation partition
  11. Current transformer
  12. Capacitive voltage divider
  13. Grounding switch
  14. Ferranti current transformers (optional)
  15. Voltage transformer (optional)
RCW1 bay
Electrical diagram
Schemat elektryczny rozdzielnicy Rotoblok RCW - Pole typu RCW1
Front view
Widok z frontu rozdzielnicy Rotoblok RCW - Pole typu RCW1
RCW2 bay
Electrical diagram
Schemat elektryczny rozdzielnicy Rotoblok RCW - PPole typu RCW2
Front view
Widok z frontu rozdzielnicy Rotoblok RCW - PPole typu RCW2

ZPUE's website uses cookies. By staying here you are agreeing to our use of cookies. learn more