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Ceramic Type Outdoor SF6 Load Break Switch

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● Summary
ROCKWILL® Electric strives to bring our customers the latest technology and competitive pricing and best service for distribution automatic.
RPS 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 RPS 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.
 

● RPS 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 RPS can withstands an internal fault without venting hot gases.
The independent spring operation mechanism adopt ROCKWILL® patent spiral spring, provides a guaranteed load break fault make capability by ensuring the opening and closing speed of the switch.
The RPS 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 RPS
ROCKWILL® 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 easily visible from ground level.
Advanced and Integrated helium leakage detecting and filling equipment, which ensuring SF6 leakage of each switch is less than 0.1% strictly per year.
Motor drive, which easily retrofitted on site to manually operated units.

 

● Creepage Distances of RPS

Terminal to ground creepage

11kV BIL 95/110kV

22kV BIL125/150kV

33kV BIL 170/200kV

Composite bushing

564mm

840mm

1400mm

Porcelain bushing

556mm

708mm

1250mm


●Current transformer and Voltage sensor

 

Part Number


RPS-11

RPS-22

RPS-33

Manual

Motorize

Manual

Motorize

Manual

Motorize

Current transformer

/

3

/

3

/

3

Voltage sensor

/

3/6

/

3/6

/

3/6

Note: Current transformers and voltage sensors can be customized according to requirements.

 

●Standards for reference
IEC 62271-1 IEC 62271-102 IEC 62271-103
High-voltage switchgear and controlgear. Part 103: switches for rated voltage above 1 kV up to and including 52 kV



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

1

1.5

2

Cable-charging breaking current

A

10

16

20

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 (CL E3)

times

5

5

5

- main switch 31.5 kA (CL E3)

times

10

10

10

- earthing switch 50 kA (CL E2)

times

3

3

3

- earthing switch 31.5 kA (CL E3)

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

   

Add20kg

Degree of protection of the mechanism box

   

IP67



Rockwill T&D Group is a high-tech enterprise specializing in developing, manufacturing and marketing power transmission and distribution products.

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