Introduction: SM6 is an air-insulated ring main unit which is compliance with the standard of GB/IEC. SM6 units are widely used for the MV secondary distribution in MV/LV transformer substations in public distribution systems and MV consumer of distribution substations up to 24kV. Technical Features:
◆ Compact design, easy installation, less maintenance, high reliability
◆ Flexible extensibility, high safety, rich of operational experience
◆ Three position switch for natural interlocking, fail-safe interlock facility
Technical Parameters:
Name
Units
Data
Rated voltage
kV
12
24
Rated current
A
630
Rated frequency
Hz
50
Rated short circuit breaking current
kA
20/25
20
Rated short circuit closing current
kA
50/63
50
1 minute power frequency withstand voltage
kV
42
65
Impulse withstand voltage
kV
75
125
Rated breaking current of no-load transformer
A
16
Rated breaking current of no-load cable
A
25
Thermal stability current
kA/s
20/4 or 25/1
20/4
Transfer current
A
1750
1400
Internal arc
kA/s
16/1 or 20/1
Long-term Customers: Workshop: Packaging:
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