Instruction Leaflet IL0102002E
Effective April 2018
Ring Main Unit Operation Instruction
6 EATON CORPORATION www.eaton.com
4.2. Rated current of the fuse:
Based on the capacity of the transformer, the rated current of the fuse is selected, as shown below.
(no overload, -25°C<0<40°C)
Transformer capacity
kVA
Rated current
A
Transformer capacity
kVA
Rated current
A
31.53151050
404001075
100
125
160
200
250
16
16
16
20
25
500
630
800
1000
1250
50
63
80
100
125
5. Standards
GB3906-2006
GB/T11022-1999
GB3804-2004
GB16926-1997
GB1984-2003
GB1985-2004
GB3309-1989
GB/T16927.1-1997
GB/T7354-2003
GB8905-1996
GB11023-1989
GB12022-1989
GB4208-1993
IEC 62271-100
IEC 62271-102
IEC 62271-105
IEC 62271-200
IEC 60694
IEC 60265-1
IEC 60529
3.6kV~40.5kV AC Metal Enclosed Switchgear and Controlgear
Common Technical Requirements of High Voltage Switchgear and Controlgear Standard
3.6kV~40.5kV High Voltage AC Load Switch
AC High Voltage Load Switch – Fuse Combination Unit
High Voltage AC Circuit Breaker
AC High Voltage Isolating Switch and Ground Switch
Mechanical Testing under Normal Temperature of High Voltage Switchgear
High Voltage Testing Technique Part 1: General Testing Requirements
Partial Discharge Measurement
Gas Management and Inspection Guideline of SF6 Electrical Equipment
SF6 Gas Sealing Test Guideline of High Voltage Switchgear
Industrial SF6
Housing Protection Degree (IP Code)
High-voltage switchgear and controlgear - Part 100: Alternating-current circuit-breaker
High-voltage switchgear and controlgear - Part 102: Alternating current disconnectors and
earthing switches (2003)
High-voltage switchgear and controlgear - Part 105: Alternating current switch-fuse
combinations for rated voltages above 1 kV up to and including 52 kV
High-voltage switchgear and controlgear - Part 105: AC metal-enclosed switchgear and
controlgear for rated voltages above 1 kV up to and including 52 kV
Common specifications for high-voltage switchgear and controlgear standards
High-voltage switches - Part 1: Switches for rated voltages above 1 kV and less than 52 kV
Degrees of protection provided by enclosures(IP Code)DL/T 592-2006 common
specifications for high-voltage switchgear and controlgear standard
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