ABB SF6 Gas Insulated Ring Main Unit Switchgear SafeRing For Secondary Distribution

SafeRing is a ring main unit (RMU) for the secondary distribution network. It is available in 18 different configurations suitable for most switching applications within the range from 6 to 40.5 kV. The standardized RMU configurations, which are mostly required within a distribution network, can be extensible upon request.
SafeRing is a completely sealed system with a stainless steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system.

Product Details

ABB SF6 Gas Insulated Ring Main Unit Switchgear SafeRing for Secondary Distribution


Introduction:

ABB SF6 Gas Insulated Ring Main Unit Switchgear SafeRing is a ring main unit (RMU) for the secondary distribution network. It is available in 18 different configurations suitable for most switching applications within the range from 6 to 40.5 kV. The standardized RMU configurations, which are mostly required within a distribution network, can be extensible upon request.

SafeRing is a completely sealed system with a stainless steel tank containing all live parts and switching functions. A sealed steel tank with constant atmospheric conditions ensures a high level of reliability as well as personnel safety and a virtually maintenance-free system. 

 

Features:

●Minimal maintenance

No live parts exposed

One full range up to 40.5kV

Module width: 325mm for 12-24kv, 420mm for 36kV

Optional integrated remote control and monitoring unit

Optional arc suppressor: No gases released even in arc fault cases

 

Benefits:

Completely sealed system

Safe and reliable operation

Smart grid enabled

Compact design with small footprint and low physical weight

Most typical variants: RMU with standard variants up to 5 modules (12-24kV) or 4 modules (36kV)

Harmonized for higher flexibility: Select SafePlus switchgear for more options

 

Applications:

Industry

Utilities and power plants

Transport

Infrastructure

 

Technical Parameters:

SafeRing

C-module

F-module

              V-module

Switch disconnector

Earthing switch

Switch-fuse disconnector

Downstream earthing switch

Vacuum circuit-breaker

Earthing switch/

disconnector

Rated voltage

kV

12/17,5/24

12/17,5/24

12/17,5/24

12/17,5/24

12/17,5/24

12/17,5/24

Rated frequency

Hz

50/50/50

50/50/50

50/50/50

50/50/50

50/50/50

50/50/50

Power frequency withstand voltage

kV

 

28/38/50

28/38/50

28/38/50

28/38/50

28/38/50

28/38/50

Lightning impulse

withstand voltage

kV

95/95/125

95/95/125

95/95/125

95/95/125

95/95/125

95/95/125

Rated normal current

A

 

630/630/630


200


200/200/200


Breaking capacities








- active load

A

630/630/630






- closed loop

A

650/650/650






- off load cable charging

A

 

140/140/140






- off load transformer

A

 



20/20/20




- earth-fault

A

205/160/160






- earth-fault cable charging


117/91/91






- short-circuit breaking current

kA

 





16/16/16


Making capacity

kA

 

52.5/40/40

52.5/40/40


12.5/12.5/12.5

40/40/40

40/40/40

Short time current 3 sec.

kA

 

21/16/16

21/16/16



16/16/16

16/16/16


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