1. 24 kV GIS Switchgear for Secondary Distribution
FLUSARC 24kV
24 kV GIS Switchgear
for Secondary Distribution

2. Main Data 12 - 24kV SF6 insulated switchgear
Compact, extensible or modular
Indoor or Outdoor
With either fuse combination or circuit breaker for transformer protection
Electric data:
Rated Voltage kV
Rated Current
630 A
Short Time Current 1s
12,5-25 kA
Making Capacity
62,5 kA
Internal Arc
21 kA 1 sec
CB Breaking Capacity
16 kA

3. Main Features Installation
Easy installation
Can reach installation site already pre-assembled
No need for specialized civil works
Fast cable connection due to standardized bushing + coupling MV cable terminals
Reduced dimensions
(CCT1, 2 disconnecting switch & 1 disconnecting switch+fuses)
Width 1065mm
Height 1665mm
Depth 825mm
Also available in 1290mm height
SF6 compartment is the same
Smaller footprint and cable compartment

4. Main Features Maintenance
Cable testing
Easy cable testing thanks to standardized bushings
Cable testing can be done without interruption of service
Terminal cover
Capacitive insulator
Test kit rod
Adapter terminal

5. Main Features Maintenance
Maintenance-free SF6 compartment
Sealed for life
No adjustement or filling with gas during the whole life
SF6 pressure gauge + warning and alarm contacts available

6. Main Features Operation
Several versions available:
Indoor or outdoor
Modular, extensible or compact
Regular or reduced height
Suitable for very harsh & polluted environments
Operates in severe conditions:
Several installations already in Saudi Arabia
Several installations already in Finland
Flusarc 24 outdoor version

7. Main Features Operation
Reliable working of the operating devices
Field-proven experience with thousand of installations over 15 years
All the operations are carried out from the front
Mechanical signals show the position of the various switching components
Correct sequence instructions is showed on switchgear front

8. Main Features Operation
Also Type tested under water
Proved to be highly reliable
Maximum service continuity
Remote operation possible

9. Main Features Maximum service continuity
Insulation of all the live parts with SF6 gas
Simple and reliable system thanks to the low pressure gas ensuring maintenance-free operation for 30 years
Suitable for applications in polluted or high humidity areas
Flusarc not affected by external ambient conditions
Flusarc can operate completely immersed in the water for a defined period (24 h)

10. Main features Personnel safety
Direct earthing of the whole switchgear structure
Total segregation of live parts located in a completely sealed SF6 stainless steel metal housing
Access to fuses without any danger with earthing at both sides
Mechanical interlocks ensure correct sequence of operations
Security and simplicity of locking devices
Internal arc proof in the tank
On request also in cable compartment
CESI type tests certification

11. Main features Personnel safety
SF6 prevents fires from spreading
Overpressure valves are placed under the switchgear:
allows the hot exhaust gas escape into cable conduit
eliminates any risk for the operator
Overpressure valves

12. Applications Compact secondary substations Light industries
Hotels, shopping centres, office buildings, business centres etc.
Airports, hospitals, tunnels, light mining applications and railways
Utilities (e.g. Iberdrola, ENEL, Endesa, EDP, Fortum, SEC)

13. Circuit Breaker Function
Characteristics:
24kV 630A
Short-time current: 16kA 1s
Option of two different relay types for CB (Self powered and Auxiliary powered)
Manual and motorized versions
Several versions available
Outdoor
Extensible
Reduced height

14. Circuit Breaker Function
Vacuum CB with 3 positions disconnector in series
Connected
Disconnected
Earthed

15. Circuit Breaker Function
Vacuum interruption technology guarantees high performance and reliability
30 years without maintenance
Circuit breaker placed inside SF6 compartment
Reduced dimension
Disconnecting switch placed inside SF6 compartment
High reliability, same mechanism for disconnecting switch and earthing switch

16. Flusarc 24 configurations, Block version I
CCC CC
CCCC C
NB: Also versions with reduced basement height 400 mm are available

17. Flusarc 24 configurations, Block version II
T1CC
T1CCC
T1CCCC

18. Flusarc 24 configurations, Block version III
T1T1CC
T1T1CCC

19. Flusarc CB 24
CBCC
CBCCC
CBC
CBCCCC
CBCBCC
CBCBCCC

20. Flusarc 24 Modular Version

21. Inner View

22. FLUSARC 24 is fully type tested

23. FLUSARC 24 is fully type tested

24. MAIN REFERENCES CUSTOMER COUNTRY ENEL ITALY ACEA ITALY AEM ITALY
SELMA / ENDESA SPAIN
FASYMON / IBERDROLA SPAIN
ELCONTROL BULGARIA
TECHNICAL UNIVERSITY-SOFIA BULGARIA
BEIJING POWER UTILITY CHINA
ZHUHDI POWER UTILITY CHINA
ELKAMO FINLAND
NOAVARAN BARQARIA IRAN
TENAGA NATIONAL BERHAD MALAYSIA Power Utility
LME (EDP Power Utility) PORTUGAL
TIEPCO (SEC Power Utility) SAUDI ARABIA
ARKO S.R.O. SLOVENSKA
INTERSWITCH PTY LTD SOUTH AFRICA
CRYSTAL CONSULTING & ENG. SWITZERLAND
STATIONENBAU AG SWITZERLAND
GIRISIM ELEKTRIC D.S. TURKEY (Tedas Power Utility)
BINH SON ELECTRIC CO.LTD VIETNAM
ONE CO.LTD VIETNAM
MAIN REFERENCES

26. Back-up slides

27. Extensibility
Possibility to further extend the configurations by externally connecting with purposed bus-bars several switchgears one to the others, providing that they were initially delivered in the extensible version.

28. Extensibility
Connectors and bus bar up to 630A

29. Key locks I To prevent wrong operations during Flusarc’s use.
Closed earth free key (transformer protection unit)
2. Closed earth free key (line unit)

30. Key locks II
3. Open earth free key (line unit and transformer protection unit)
4. Open line free key (line unit and transformer protection unit)

31. Operating mechanisms Exceeding dead center operating mechanism
Energy stored in previously charged springs
Opening spring charged during closing operation
Switch-disconnector
It allows quick closing and opening
Closing spring manually or motor charged
Robust operating mechanism manufactured in thousands of pieces

32. Operating mechanisms Earthing switch
Quick closing, by preaccumulated energy in the spring
Slow manual opening, with simultaneous spring re-load

33. Operating mechanisms Fuse-switch-disconnector
It performs a quick closing and quick opening, both manual and automatic by a release
The movement allows at the same time to load the closing and opening spring
Once closed, opening spring is loaded and ready to operate

34. Operating mechanisms Circuit breaker
CB op.mech. is of mechanical type with energy stored in springs
Wide range of accessories
Shunt releases
Spring position indicators …
CB oper.mech.
3 positions SD oper.mech.

35. Optional accessories Protection relays Key locks Auxiliary contacts
Shunt op-cl releases
Voltage presence indicators
Geared Motor in L, T and CB
Demagn. opening solenoid
Fault presence indicators
MV fuses

36. Interlocks
Impossibility to remove (partially or completely) the cable compartment cover unless the main switch has first been opened and then the earth switch closed
Once the compartment cover has been removed, it is possible to open the earth switch (for cables testing purposes)
It is not possible to close the main switch while the cable compartment cover is removed

37. Voltage presence signal lamp
Three phases voltage presence device through three signal lamps supplied by a capacitive voltage divider.
Installed on the coupling already present on the panel.

38. Relays
VPR-SP1 (DPX-1) is a compact self powered relay; it uses specific CTs with secondary rated for 1A and it provides the following protection functions:
Overcurrent protection ( )
Earth fault protection (50N - 51N)
Both internal same or residual CT
VPR-P1 is a compact relay; bipolar phase protection against overloads and short-circuits plus maximum current homopolar protection (50 – N)
Any relay can be supplied on customer request

39. Fuses
Fuse inserted inside a fuse-holder, from which it can be frontally extracted after having opened the protection dust proof enclosure.
Insulation between fuse and fuse-holder is provided by air.
Fuses are placed one above the other inside the switchgear hermetic housing, fully insulated in SF6 gas.
Fuse position assures easy replacement and a sure intervention by the striker.
Extraction is possible only if the fuse is isolated and earthed on both sides.

40. Fuses
Automatic opening of the main switch when one or more fuses get blown
A blown fuse is clearly visible on the enclosure cover
The fuse rated current depends on:
Service voltage
Transformer power

41. REGULAR OPERATION GUARANTEED UP TO RELATIVE PRESSURE
Service pressure
REGULAR OPERATION GUARANTEED UP TO RELATIVE PRESSURE
= 0
0,3 BAR PRESSURE IS NEEDED ONLY TO GUARANTEE A DELTA BETWEEN INTERNAL/EXTERNAL PRESSURE EVEN AT TEMPERATURE BELOW 0°C

42. Pressure gauge device
SF6 pressure gauge device positioned on the front of the switchgear and compensated in temperature
No-return valve provided
When the pointer is inside the red sector, it is possible to proceed with the filling of gas, through the valve positioned under the pressure gauge device

43. Pressure gauge device
Valve used also to carry out vacuum and refilling
Gas filling possible with switchgear in service
Safety valve installed in the lower part of the stainless steel enclosure, in the case of over pressure generated by internal arc

44. Pressure gauge device features
Possible to install a pressure switch
2 contacts available for low pressure warning and alarm

45. FLUSARC RMU - Factory
Autoclave for gas leakage test
Assembly line

46. FLUSARC RMU - Testing
Vacuum made simultaneously in the enclosure and in the autoclave chamber
Enclosure filled in with Helium (smaller molecule than SF6)
Measurement of the amount of gas leakage by a mass spectrometer
SF6 gas is then charged at 130 kPa absolute

47. Inner view External enclosure in stainless steel AISI 304 (30/10 mm)
Mechanism covers in carbon sheet (P11) and powder-coating treated
Fuses housing in quartz-filled epoxy-resin
Interlocks of hindrance type and manually operated