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Pole-mounted SF6 Load Breaker Switch SFS

Pole-mounted SF6 Load Breaker Switch SFS

Provided Customized manufacture

Whole solutions for design, assembly, test

product details

product description

General

SHUANGFENG® Electrical strives to bring our customers the latest technology and competitive pricing and best service for distribution automatic.

SFS is an SF6-insulated, outdoor pole mounted load break switch family for overhead lines and specifically

designed for use in modern remote controlled distribution automation systems. The SFS offers reliable maintenance free operation even in the most demanding climatic conditions including salt laden atmospheres, corrosive industrial

pollution, snow and ice. It has excellent load breaking and fault making capacity and satisfies the isolation

requirements specified for load break switch. The earthed metal tank prevents all possible leakage currents across an open switch. RPS can be manually operated or motor operated for local and remote electric control, upgraded.

Service environment

1.Air temperature: Maximum temperature: +85℃; Minimum temperature:-45℃

Humidity: Monthly average humidity 95%; Daily average humidity 90% .

Altitude above sea level: Maximum installation altitude: 2500m or more higher.

Ambient air not apparently polluted by corrosive and flammable gas, vapor etc. No frequent violent shake

Offering

With optional classes for rated current range:--Type SFS 15, Rating6-20 kV with 400A, 16 kA up to 1250A, 20kA;--Type SFS 27, Rating22-27 kV with 400A, 16 kA up to 1250A, 20kA;--Type SFS 38, Rating30-40.5 kV with 400A, 16 kA up to 1250A, 20kA;With optional classes for different grid application installation:Section function (Section)50 Instantaneous/Definite-Time Overcurrent(P.OC)51 Phase Time-Overcurrent(P.Fast curve/P.Delay curve)Overload (N.Fast curve/N.Delay curve)50N Residual Ground Instantaneous/Definite-Time Overcurrent(G.OC)51N Residual Ground Time-Overcurrent (G.Fast curve/G.Delay curve)50SEF Sensitive Earth Fault (SEF)51c Cold Load(Cold load)TRSOTF Switch-Onto-Fault(SOTF)59 Over Voltage（L.Over volt）27 Under Voltage (L.Under volt)

Monitoring Functions:Primary/Secondary Phases and Earth CurrentsDirectionPrimary/Secondary Line and Phase VoltagesApparent Power and Power FactorReal and Reactive PowerHistorical Demand RecordPositive Phase Sequence Voltage & CurrentNegative Phase Sequence Voltage & CurrentZero Phase Sequence VoltageFrequencyBinary Input/Output statusTrip circuit healthy/failureTime and dateFault recordsEvent records

Time-Overcurrent Curves

IEC Curves:C1 (Standard Inverse)C2 (Very Inverse)C3 (Extremely Inverse)C4 (Long-Time Inverse)C5 (Short-Time Inverse)

U.S. Curves: U1 (Moderately Inverse) U2 (Inverse) U3 (Very Inverse) U4 (Extremely Inverse)

PC software for controller Testing, Setting, programing, Update.

SFS feature

The high quality 3 mm stainless steel are used for tank, which is designed for its maximum robustness and minimum welding line to minimize corrosion, and specifically to guarantee the safety of the

operation personnel even with the internal arc faults at the maximum fault capacity of the tank the SFS can withstands an internal fault without venting hot gases.

The independent spring operation mechanism adopt SHUANGFENG® patent spiral spring, provides a guaranteed load break fault make capability by ensuring the opening and closing speed of the switch.

The SFS is provided with light reflecting position indicator which are directly connected to the switch operating

shaft providing clear and unambiguous switch position indication. Indicator made of light reflecting material, which is easily visible from ground level even at night in driving rain.

Main new advantages of SFS

SHUANGFENG® Supply special design manual closing device technology with own patent, It applied for normal and abnormal situation closing. It’s closing speed(time) comply with IEC62271-100.

This function can offset from magnetic actuator fault which when actuator can’t work will cause the major accident.

Corrosion resistant, Composite bushingManual lock-out mechanism (including hook stick)Reliable housing groundO/C indicator (made of light reflecting material),Operation counter, Gas density gauge which are easilyvisible from ground level.Advanced and Integrated helium leakage detectingand filling equipment, which ensuring SF6 leakage ofeach switch is less than 0.1% strictly per year.Motor drive, which easily retrofitted on site tomanually operated units.

Creepage Distances of SFS

Terminal to ground creepage	15kV BIL 95/110kV	27kV BIL125/150kV	38kV BIL 170/200kV
Composite bushing	564mm	840mm	1400mm
Porcelain bushing	556mm	708mm	1250mm

Current transformer and Voltage sensor

Part Number	SFS-15		SFS-27		SFS-38
Part Number	Manual	Motorize	Manual	Motorize	Manual	Motorize
Current transformer	/	3	/	3	/	3
Voltage sensor	/	3/6	/	3/6	/	3/6

Standards for reference

Main technical data

Insulation level
Rated voltage	kV	15	27	38
Power frequency withstand voltage, 50 Hz
- to earth and between phases	kV	28	50	70
- across the isolating distance	kV	32	60	80
Lightning impulse withstand voltage
- to earth and between phases	kV	75	125	170
- across the isolating distance	kV	85	145	195
Current ratings
Rated normal current	A	400/630/800/1250
Mainly active load breaking current	A	400/630/800/1250
Number of breaking operations CO	times	400
Line-charging breaking current	A	50	50	2
Cable-charging breaking current	A	50	50	40
Earth fault breaking current	A	50	50	130
Cable charging breaking current
under earth fault conditions	A	28	28	80
No-load transformer breaking current	A			20
Short-circuit ratings
Short-time withstand current, Ik	kA/s	20 kA/4 s	20 kA/4 s	20 kA/4 s
Peak withstand current	kA	50	50	50
Short-circuit making current	kA	50	50	50
Number of making operations
- main switch 50 kA (CLE3)	times	5	5	5
- main switch 31.5 kA (CLE3)	times	10	10	10
- earthing switch 50 kA (CLE2)	times	3	3	3
- earthing switch 31.5 kA (CLE3)	times	5	5	5
Ambient air temperature limits		-40°C...+60°C
Mechanical endurance (number of CO operations)
- main switch	times	5000	5000	5000
- earthing switch	times	2000	2000	2000
Filling pressure (+20°C)	bar (abs)	1.4-1.5	1.4-1.5	1.8-1.9
Alarm pressure (+20°C)
- density switch	bar (abs)	1.2	1.2	1.65
- density gauge	bar (abs)	1.2	1.2	1.6
- low gas lock-out mechanism	bar (abs)	1.1	1.1	1.6
Weight
Composite bushing	kg	115	125	135
Porcelain bushing	kg	125	135	155
Motorize		Add 20kg
Degree of protection of the mechanism box		IP67