SF6 Ring main Unit/SF RMU

Service condition

Normal Condition

Ambient temperature

Indoor

-5°C to +40°C

Outdoor

-10°C to +40°C

Humidity

90%

Altitude

≤1000m

Pollution

Level I-Light

Level II-Medium

Earthquake

UBC Zone 3

Special Condition

Ambient temperature

Indoor

-15°C to +40°C, -25°C to +40°C

Outdoor

-10°C to +50°C, -25°C to +40°C

-40°C to +40°C

Humidity

95%, 98%

Altitude

≤2000m, ≤3000m, ≤4000m

Pollution

Level III-Heavy

Level IV-Very Heavy

Earthquake

UBC Zone 4

K-factor

3, 5, 7, 9, 11, 13, 15, 17

Standard code

IEC 60694 Common specifications for high-voltage switchgear and controlgear standards

IEC 62271-200 High-voltage switchgear and controlgear-Part 100: AC metal-enclosed switchgear and controlgear for rated voltage above 1 kV and up to and including 52kV

IEC 62271-202 High-voltage switchgear and controlgear-Part 202: High voltage/low voltage prefabricated substation

IEC 62271-105 High-voltage switchgear and controlgear-Part 105: Alternating current switch-fuse combinations

IEC 62271-102 High-voltage switchgear and controlgear-Part 102: High-voltage alternating current disconnectors and earthing switches