CTS Ex p Transformer Substation

Transformer/Distribution Substations

CTS Ex p Compact Transformer Substation


Application: mining, oil-/ gas- and chemical industry
Distribution system: TN
Transformer: cast resin
Rated voltage transformer (Pn): 100 – 1250 kVA
Connection: Dyn11 – Class F
Earthed neutral-system: direct
Rated voltage LV / MV (Ue1): 0,4 kV / 24 kV
Rated current LV / MV (In1): depending of the power / 630 A
Short-circuit-current (Icc x 1 sec): 16 kA
Power frequency withstand voltage (50/60 Hz, 1 min) (Ud): 50 kV
Rated lighting impulse withstand voltage (Up): 95 kV
Auxiliary circuit voltage: 24 V DC / 230 V AC
Frequency: 50 Hz
Protection class: IP 55
Ambient temperature: -20 °C up to +45 °C
Relative humidity: 0 – 90%
Altitude: <1000 m over sea level
Cable entries: bottom
Surface treatment: powder coated, RAL 3020 (red)
Dimensions: up to 20 m³ (customized)


  • I M2 Ex pxb I Mb
  • II 2D Ex pxb IIIC T 135°C Db
  • II 2G Ex pxb IIC T4 Gb
  • ATEX 2014/34/EU
  • IEC EN 60079-0
  • IEC EN 60079-1
  • IEC EN 60079-2
  • IEC EN 60079-7
  • IEC EN 60079-11
  • equipped with the pressurized system PCS-Ex p SIL2
  • protective gas with overpressure inside the station departments and cubicles prevents the penetration of explosive gases from the outer atmosphere
  • I M2 Ex pxb I Mb (for non outside installations in mining areas)
  • II 2G Ex pxb IIC T4Gb (for outside installations)
  • cooling system via heat exchanger air-water or fluid
  • heat dissipator by radiation or convention
  • battery system for independent power supply of pressurization logic unit
  • outlets like equipment mounted couplers and 230 V sockets for the LV users