IEC Standdard 33kv Indoor Sf6 Gas Insulated Ring Main Unit Switchgear

• Customization: Available
• Certification: ISO9001
• Shell Material: Aluminum Alloy
• Model NO.: RMR
• Voltage Level: Medium Voltage
• Installation: Fixed
• Structure: Cabinet
• Current: AC
• Transport Package: Carton
• Specification: IEC, GB
• Trademark: Rockwill
• Origin: China
• HS Code: 8535210000
• Production Capacity: 1000PCS

Product Description

Product Description

Safering SF6 insulated Ring Main Unit

Gas Insulated Ring Main Unit

iSafeRing is a SF6 insulated ring main unit for the secondary distribution network. iSafeRing can be supplied in 10 different configurations suitable for most switching applications in 12/24/36 kV distribution networks. As an option, iSafeRing can be delivered as extendable ring main unit.

Together, iSafeRing represent a complete solution for 12/24/36 kV secondary distribution networks.

C - Cable switch module	F - Cable switch module	V - Cable switch module
D - Direct cable connection module	De - Direct cable connection module with earthing switch	M - Metering module

Modularity and external busbar

All modules except the metering module and circuit-breaker module are only 325 mm wide.

Transformer protection

iSafering offers a choice between a switch fuse combination and circuit breaker with relay for transformer protection. The switch fuse combination offers optimal protection against short-circuits, while the circuit breaker with relay option offers better protection against low overcurrents. Circuit breaker with relay is always recommended for larger transformers.

Normal operation conditions

The rated characteristics of the switchgear are valid under the following ambient conditions:
minimum ambient temperature: - 25 °C
maximum ambient temperature: + 40 °C
For different temperature ranges, please contact your UNISUN sales representative.

Standards

iSafeRing/iSafePlus is tested according to following
IEC-standards:
IEC 62271-1/IEC 62271-100/IEC 62271-102/IEC 62271-103/IEC 62271-105/IEC 62271-200/IEC 60529:
 
SF6 insulated Ring Main Unit Outer assembly

iSafering outer assembly

Upper front cover 1. Manometer 2. Nameplate module 3. Short circuit indicator 4. Capacitive voltage indication 5. Load break / earthing switch position indicator 6. Push buttons close/open operation 7. Charged spring indicator 8. Self-powered protection relay 9. Vacuum circuit-breaker position 10. Operation shaft 11. Padlock device Lower front cover 12. Nameplate switchgear 13. Fuse blown indicator 14. Disconnector / earthing switch position indicator 15. Capacitive voltage indication Cable compartment cover 16. Cable compartment cover standard 17. Cable compartment cover with inspection window 18. Support bar (removable) Side cover 19. Lifting lug 20. Operating handle (standard on right hand side)

 

Inner assembly

1. Mechanism compartment 2. SF6 gas tank 3. Cable compartment 4. Pressure relief area

Technical data

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 5)	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		200^1)		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	A	117/91/91
short-circuit breaking current	kV			see^2)		16/16/16
Making capacity	kV	52,5/40/40	52,5/40/40	see^2)	12,5/12,5/12,5	40/40/40	40/40/40
Short time current 3 sec. 3)	kV	21/16/16	21/16/16			16/16/16	16/16/16