(MV) TPM

Here is the information from the document about TPM series switches, clearly organized in list form, without a table:


The switches in the series TPM are medium voltage type switches RMU (Ring Main Unit), gas insulated SF₆, intended for use inside.

Use:

  • For secondary power supply and distribution of electricity
  • In urban radial and ring networks
  • In industry and other facilities where compact equipment with high technical parameters

Standardization and testing:

  • According to international standards
  • Type tests performed by independent and accredited certification bodies
  • The results are confirmed by certifications and test reports


Nominal parameters of the TPM switch:

  • Nominal medium voltage (Ur): 25 kV
  • Nominal frequency / Number of phases (Fr): 50 / 60 Hz / 3
  • Power frequency withstand voltage (Ud): 50kV / 60kV
  • Atmospheric impulse withstand voltage (Up, 1.2/50 μs): 125 kV / 145 kV
  • Rated continuous current of main busbars (Ir): 630 A
  • Nominal permissible short-circuit current of primary circuits (Ik):
  • 16 kA (3 seconds)
  • 20 kA (1 second)
  • 25 kA (3 seconds) *1)
  • Permissible peak current primary circuits (Ip):
  • 40 kA
  • 50 kA
  • 63 kA *1)
  • Internal arc resistance (IA):
  • 20kA (1s)
  • 22 kA (1 s) *1)
  • IAC class (internal arc resistance): AFLR
  • IP protection degree: IP4X (optional IP54)
  • Mechanical shock resistance (IK): IK10

1) Available in customized version


Operating conditions:

  • Ambient temperature:
  • short-term maximum: +40°C
  • daily average maximum: +35°C
  • minimum:
  • without secondary circuits: -25°C
  • with secondary circuits: -5°C / -15°C / -25°C 2)
  • Relative air humidity:
  • maximum daily average: 95%
  • maximum monthly average: 90%
  • Vibrations:
  • vibrations from external factors or earthquakes are negligible


Internal protection:

  • Equipment compartment / stainless steel SF₆ tank: IP67
  • Drive mechanism and connections compartment: IP4X


Environmental conditions:

  • Contamination with salt, vapors, dust, smoke, flammable gases: NOT
  • Corrosive gases: NOT
  • Ice formation, frost, condensation: NOT

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