ROTOBLOK medium voltage switchgear

Type switch ROTOBLOK, of the latest generation, is intended for indoor use for the distribution of three-phase alternating current with a frequency of 50 Hz, at a nominal voltage of up to 24 kV. It is used in distribution networks in the industrial and commercial sector.

The switches are configured from single standard modules, variously equipped. The designer can assemble a switch using the typical modules shown. For modules with different equipment or modified dimensions, consultation with the manufacturer is required.

Electrical data:

ROTOBLOK 17.5 kV:

• Nominal network voltage: 15 kV
• Maximum equipment voltage: 17.5 kV
• Nominal frequency / Number of phases: 50 Hz / 3
• Rated power frequency withstand voltage (1 min): 55 kV / 63 kV
• Atmospheric impulse withstand voltage (1.2/50 μs): 95 kV / 110 kV
• Rated continuous current: 630 A / 1250 A
• Rated permissible short-circuit current (1 s): 16 kA
• Permissible peak current: 40 kA
• Internal arc withstand rating (IAC): AF up to 16 kA (1 s)
• Protection degree: IP4X

ROTOBLOK 24:

• Nominal network voltage: 20 kV
• Maximum equipment voltage: 24 kV
• Nominal frequency / Number of phases: 50 Hz / 3
• Rated power frequency withstand voltage (1 min): 50 kV / 60 kV
• Atmospheric impulse withstand voltage (1.2/50 μs): 125 kV / 145 kV
• Rated continuous current: 630 A – 1250 A
• Rated permissible short-circuit current (1 s): 16 kA
• Permissible peak current: 40 kA
• Internal arc withstand rating (IAC): AF up to 16 kA (1 s)
• Protection degree: IP4X

Terms of use:

• Ambient temperature:
• short-term maximum: +40°C
• daily average maximum: +35°C
• maximum annual average: +20°C
• long-term minimum: -25°C¹
• Relative air humidity:
• maximum daily average: 95%
• maximum monthly average: 90%
• Water vapor pressure:
• maximum daily average: 2.2 kPa
• monthly average maximum: 1.8 kPa
• Atmosphere at the installation site:
• without significant contamination with salt, vapors, dust, smoke, flammable or corrosive gases
• no ice, frost or condensation formation
• Installation altitude:
• up to 1000 m above sea level²

Note:

1. Minimum temperature values must be confirmed depending on the application.
2. For higher altitudes, consultation with the manufacturer is required.

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