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Wenzhou Unisun Electric Co., Ltd.

11kv Ring Main Unit, Metal Clad Ring Main Unit, Ring Main Unit manufacturer / supplier in China, offering Metal Clad Sf6 Insulated 11kv Ring Main Unit, Fix Version 0.4kv Electric Power Distribution Cabinet Low Voltage Switchgear, 33kv Draw-out Type Air Insulation Metal Enclosed Switch Cabinet and so on.

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Metal Clad Sf6 Insulated 11kv Ring Main Unit

FOB Price: US $5,000 / Set
Min. Order: 1 Set
Min. Order FOB Price
1 Set US $5,000/ Set
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Port: Ningbo, China
Production Capacity: 50000
Payment Terms: L/C, T/T, Western Union, Paypal, Money Gram

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Basic Info
  • Model NO.: UN-S6RMU
  • Structure: Protection
  • Form: All- packaged Type
  • Size: 2 Uint
  • Shell Material: Steel Plate
  • Brand: Unisun
  • Rated Frequency: 50Hz
  • Lightning Impulse Withstand Voltage: 95/95/125/150
  • Trademark: UNISUN
  • Specification: 12KV/24KV
  • HS Code: 85372090
  • Type: Power
  • Certification: ISO9001:2000, VDE, CCC
  • Operation Voltage: High Voltage
  • Application Range: High-rise Buildings
  • Shell Protection Grade: IP23
  • Rated Voltage: 12/ 17.5/ 24 /33kv
  • Power Frequency Withstand Voltage: 28/38/50/75
  • Rated Normal Current: 630A
  • Transport Package: Wooden
  • Origin: China
Product Description
UN-S6RMU SF6 insulated Ring Main Unit
Gas Insulated Ring Main Unit
UN-S6RMU is a SF6 insulated ring main unit for the secondary distribution network. UN-S6RMU can be supplied in 10 different configurations suitable for most switching applications in 12/24/36 kV distribution networks. As an option, UN-S6RMU can be delivered as extendable ring main unit.
Together, UN-S6RMU 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
UN-S6RMU 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.
UN-S6RMU/iSafePlus is tested according to following
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
Metal Clad Sf6 Insulated 11kv Ring Main Unit

UN-S6RMU 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
Metal Clad Sf6 Insulated 11kv Ring Main Unit
1. Mechanism compartment
2. SF6 gas tank
3. Cable compartment
4. Pressure relief area
Technical data
Switch disconnectorEarthing switchSwitch-fuse disconnectorDownstream earthing switchVacuum circuit-breakerEarthing switch/ disconnector
Rated voltageKv12/17,5/24/3312/17,5/24/3312/17,5/24/3312/17,5/24/3312/17,5/24/3312/17,5/24/33
Rated frequency 5)Hz50/50/5050/50/5050/50/5050/50/5050/50/5050/50/50
Power frequency withstand voltagekV28/38/5028/38/5028/38/5028/38/5028/38/5028/38/50
Lightning impulse withstand voltagekV95/95/12595/95/12595/95/12595/95/12595/95/12595/95/125
Rated normal currentA630/630/630 2001) 200/200/200 
Breaking capacities:       
active loadA630/630/630     
closed loopA650/650/650     
off load cable chargingA140/140/140     
off load transformerA  20/20/20   
earth-fault cable chargingA117/91/91     
short-circuit breaking currentkV  see2) 16/16/16 
Making capacitykV52,5/40/4052,5/40/40see2)12,5/12,5/12,540/40/4040/40/40
Short time current 3 sec. 3)kV21/16/1621/16/16  16/16/1616/16/16

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Metal Clad Sf6 Insulated 11kv Ring Main Unit

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