I. General
SafeRing and SafePlus are SF6 insulation ring main unit and compact switch used in medium-voltage distribution network respectively. SafeRing is a ring-network main unit. SafeRing can configure up to 6 modules in the same SF6 insulation gas chamber to supply maximum 16 fixed combination modes for distribution to adapt to most of the places with ring-network needed. SafeRing combinations are: ( DF, CF, CCC, CCF, CFC, FCC,CCCC, CCCF, CCFF, CFFC, CCVV, CCCCC, CCFFF,CCCFF, CCCCF, CCCCCC).
SafePlus is a kind of compact switchgear. SafePlus can configure up to 6 modules in the same SF6 insulation gas chamber. If the modules are more than six, use extended buses to connect the switchgears to form semi-modular structure, or use extended buses among all the modules to form full-modular configuration. Distribution plans from simple to complex can be developed via nine different functional modular combinations to meet various configuration requirements of secondary substations and switching station. SafePlus modules types are: C, De, D, F, V, SL, SvBr, Be, M, CB.SafeRing and SafePlus include a stainless steel cabinet where all the electrical parts and switch functions are integrated.
II. Technical Parameters
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C module |
F module |
V module |
CB module |
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Vacuum Switch |
Isolation/ Grounding Switch |
Vacuum Circuit Breaker |
Isolation/ Grounding Switch |
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Rated Voltage kV |
12/24 |
12/24 |
12/24 |
12/24 |
12/24 |
12/24 |
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Power Frequency Withstand Voltage kV |
42/50 |
42/50 |
42/50 |
42/50 |
42/50 |
42/50 |
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Lightning Impulse Withstand Voltage kV |
95/125 |
95/125 |
95/125 |
95/125 |
95/125 |
95/125 |
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Rated Current A |
630/630 |
Note(1) |
630/630 |
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1250/800 |
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Breaking Capacity |
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Enclosed Ring Breaking Current A |
630/630 |
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Cable Charging Breaking Current A |
135/135 |
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\ |
\ |
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5%Rated Active Load Breaking Current A |
31.5/- |
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Ground Fault Breaking Current A |
200/150 |
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Cable Charging Breaking Current Under Ground Fault A |
115/87 |
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Short-circuit Breaking Current KA |
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Note(2) |
20/16 |
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25 (20) Note(3) |
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Closing Capacity KA |
63/52.5 |
Note(2) |
50/40 |
50/40 |
63 (50) Note(3) |
63/50 |
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Short-time Withstand Current 2s KA |
25/- |
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Short-time Withstand Current 2s KA |
-/21 |
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20/16 |
20/16 |
25(20)(3) |
25/20 |
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Mechanical Life |
5000 |
3000 |
5000 |
2000 |
10000 |
2000 |
1. It depends on fuse rated current.
2. It is limited by high voltage fuse.
3. The data in brackets are the parameters of 800A cabinet in 24KV system.
SafeRing ring main unit / SafePlus compact switchgears applys with IEC 62271-100, IEC 62271-102, 62271-103, 62271-200, 62271-105, 62271-1, GB/T11022-2011, GB3906-2006, GB1985-2004, GB16926, GB3804-2004, GB1984-2003 and GB3309-89 standards.
III. Cabinet Structure
1. Fuse compartment
2. Capacitive voltage indicator
3. Voltage indicator
4. Analog circuit diagram
5. Fuse indicator
6. Padlock on panel
7. Cable compartment
8. IDS installation compartment
9. Load switch operation hole
10. Ground switch operation hole
11. Opening button
12. Closing button
