1. WFR-12~24 Product presentation
SF6 Gas Insulated Ring Main Unit &Compact Switchgear
WFR-12~24 Product presentation
广州五合智能电气有限公司
GUANGZHOU F-UNITE SMART ELECTRIC CO.,LTD

2. Secondary distribution
substation
Distribution
400 kV
40-70 kV
130 kV
11/22 kV
Transmission
Main substation
400 V
Transformer

3. RMU in network

4. Applicable standards IEC 60265 : Switching and operations
IEC : Switch-fuse co-operation
IEC : Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 1kV and up to and including 52kV
IEC : High-voltage alternating current disconnectors and earthing switches
IEC : High-voltage alternating current Circuit breakers
GB3804: Alternating-current load switchgear for rated voltages above 3.6kV and up to and including 40.5kV
GB1984: High-voltage alternating current Circuit breakers
GB1985:High-voltage alternating current disconnectors and earthing switches
GB16927: Switch-fuse co-operation
GB3906:Alternating-current metal-enclosed switchgear and controlgear for rated voltages above 3.6kV and up to and including 40.5kV

5. RMU applications Compact secondary substations Wind power plants
Small industries
Buildings
Mining
Airports
Underground installations

6. RMU - technical data * Requires 400 series bolted bushings
** 1 sec. ratings on request

7. RMU modules C- cable switch F-switch fuse disconnector
V-vacuum circuit breaker
Sl-busbar sectionaliser
Sv-with vacuum circuit breaker
D-direct cable connection
De-with earthing switch
Be-busbar earthing
M-metering

8. C - cable switch Snap action or latched mechanism
Three position load break switch
Snap action or latched mechanism
Cable test bushings in front available

9. F – switch fuse disconnector
Switch fuse combination
Three phase fuse tripping
Mechanism pre-charged for tripping
Up and downstream dual earthing switch
No jammed fuse covers - open by handle
Fuse tripping in front - real blown fuse indicator
Fully submersible - unique for switch fuse
400 series cable bushings available

10. V – vacuum circuit breaker
630A or 200A vacuum circuit breaker
Latched mechanism – close and open coil
Separate isolator/earthing switch
Protection as specified by our customers
Tripping facilitated for a wide range of relays

11. Sl – busbar sectionaliser
Three position load break switch
Interlocked earthing switch
Manual or motor operation
Only 325mm wide when placed
between other modules

12. Sv – with vacuum circuit breaker
630A vacuum circuit breaker
Separate isolator/earthing switch

13. D – direct cable connection

14. De – with earting switch
Direct cable connection
Earthing switch with making capacity

15. Be – busbar earthing Earthing switch with making capacity

16. M - Metering Air insulated and factory assembled module
Type tested with specific transformers
2 or 3 pcs DIN Narrow type CT’s with ribs.
3 pcs. DIN Narrow type single pole VT’s
Fuses on VT primary (optional)
400series bushings for busbar connection
Bottom cable entry available

17. Switchgear Design (C) Three position switch
Switch, disconnector, earth
Arc quenching by SF6 gas
Rough and reliable with a minimum of parts

18. Switchgear Design (F) Fuse canisters isolated in gas
Whole fuse system in one module to simplify layout
No climatic deterioration
Earthing on both sides - simultaneous upstream and downstream
Fuse cover interlock - no hazardous access
Fuse solution – fully submersible

19. Switchgear Design (V) Vacuum circuit breaker Vacuum tube from China
Interruption in vacuum
Insulation provided by gas
Reliable and durable
No consumable parts
Sealed for life
Separate earthing switch

20. Fused protection Switch fuse combination offers
optimal short circuit protection:
Fast interruption
Current limiting - reduces stress
Cost efficient
Considerations:
Fuses are consumables
Availability of stock
Transformer size
Fuse selection table supplied with each switchgear - accounting for thermal de-rating.

21. Relays - Selfpowered
CT powered protection relay (no external power supply necessary)
Economical
Easy adjustment
Perfect for large distribution transformers
Delivery range:
Circutor MPRB 99: Easy to adjust, the classic solution
WIC1: New flexible relay with several characteristics including definite time
PR512: Relay with advanced earth fault functions

22. Relays – feeder protection
Advanced protection schemes
Possible use of sensors
Auxiliary power required
Delivery range:
Short circuit and earth
fault protection
Offers current and voltage measurement
with combisensors
Others on request

23. Arc suppressor Closed rooms In the rare event of arc-fault
3 phase earthing switch
Reacts on pressure
No fatal pressure increase
No arcing gases
No need for ventilation
All parts inside the tank
Superior solution for:
Crowded areas
Closed rooms
Underground installations

24. Mechanism and interlocks
Rough and reliable mechanisms
Minimum of moving parts
High number of operations
Latched snap action is availabe
Mechanical interlocks
- internally, not on the front covers
- fuse compartment
- cable compartment (option)
- cable test compartment (option)
True position indication
Padlocking device
C mod.
F mod.
V mod.

25. Cable termination - bushings
Serie 600, bolted, A
Serie 200, bolted, 200A

26. Cable connection All bushings - same height Simplified installation:
Front dismantle
Cable cut one length
Revolving
Adjustable cable support
Double adapters (e.g.NKT) and surge arresters fits behind cable cover
Double front covers available
Arc proof cable compartment available

27. Remote control and monitoring
Integrated solution with main components:
RTU211: 16DI, 8DO, 6AI, VDC
Additional I/O: 16DI (option)
Battery charger (110 or 220VAC/24VDC or
48VDC)
Batteries 2x12VDC (20Ah)
Communication devices
V23 fixed line modem
Dial up modem
RS-232 for external devices
Heater (optional)
Surge arresters (aux supply and communication interface)

28. Installation and maintenance
Compact design
Easy to install and connect
Open front cable entry
Commissioning - factory tested
Maintenance - on demand only
NO live parts exposed
Minimum number of parts
Fully sealed and screened unit
Virtually maintenance free
At site conditions decides

29. Production facilities
成套设施，一次完成抽真空、氦气检漏、充SF6气体多种功能。
成套设施，一次编程完气箱焊接功能。

30. Typical application（1）DF CF
CFC
CFF
CCC
CCF
FCC
CFFF
CCFF
CCVV

31. Typical application（2）
CCCC
CCCF
CFFC
CCCCC
CCFFF
CCCFF
CFFFF
CCCCF