Outdoor SF6 gas circuit breaker
GCB medium voltage circuit-breakers for outdoor installation use sulphur hexafluor…
Outdoor SF6 gas circuit breaker

Outdoor SF6 gas circuit breaker

Detailed description

  • Description
  • Technical data
  • size

GCB medium voltage circuit-breakers for outdoor installation use sulphur hexafluoride gas (SF6) to extinguish the electric arc and as the insulating medium.

Breaking in SF6 gas takes place without current chopping or generation of overvoltages.

These characteristics guarantee a long electrical life for the circuit-breaker and limited dynamic, di-electric and thermal stresses on the installation.

The GSH type of stored energy and free release mechanical operating mechanism allows opening and closing operations through local and remote control.

The operating mechanism, the activating kinematics of the moving contacts and the anti-condensation heater are located inside a tight metal enclosure which also acts as the support for the poles.

The above-mentioned structure is supported by a frame made of telescopic metal sections which allow the height of the circuit-breaker terminal to be adapted from 2800 mm to 3700 mm.

The metal enclosure has IP 54(*) degree of protection and is fitted with a tight door with an inspection window.

The circuit-breaker is compact and ensures a high level of sturdiness and excellent mechanical reliability.

The enclosure is made out of a steel plate with adequate surface protection by a special metalising and painting process. The support structures are hot dip galvanised.



Circuit-breaker on column

GCB-12/24

GCB-36

GCB-40

Standards

IEC 62271-100

Rated voltage

Ur [kV]

12/24

36

40.5

Rated insulation voltage

Us [kV]

12/24

36

40.5

Withstand voltage at 50 Hz

Ud (1 min) [kV]

70 (dry) /

60 (wet)

95 (dry) /

80 (wet)

95 (dry) /

80 (wet)

Impulse withstand voltage

Up [kV]

125/150

200

200

Rated frequency

fr [Hz]

50-60

50-60

50-60

Rated normal current (400C)

lr [A]

1250

2500

1250

2500

1250

2500

Rated breaking capacity

Isc [kA]

25

25

25

25

25

25

31.5

31.5

31.5

31.5

31.5

31.5

Rated short-time

Ik [kA]

25

25

25

25

25

25

withstand current (3 s)

31.5

31.5

31.5

31.5

31.5

31.5

Making capacity

Ip [kA]

63

63

63

63

63

63

80

80

80

80

80

80

Operation sequence

[O-0, 3s-CO-15s-CO]

Opening time

[ms]

45+10

45+10

45+10

Arcing time

[ms]

10-15

10-15

10-15

Total breaking time

[ms]

55-60

55-60

55-60

Closing time

[ms]

75+10

75+10

75+10

Overall dimensions

on frame

3090 – 3840

3090 – 3840

3090 – 3840

H [mm]

L [mm]

900

900

900

P [mm]

686

686

686

Weight

[Kg]

900

900

900

SF6 gas absolute pressure

Rated service value [kPa]

380

380

550

Operating temperature (1)

[0C]

–25...+40

–25...+40

–25...+40

Tropicalisation

IEC: 60068-2-30, 721-2-1

Electromagnetic compatibility

IEC: 60694, 61000-6-2, 61000-6-4

Solar radiation

[W/m2]

1000

1000

1000

Presence of pollution

IEC 815 - table 1

Level III

Level III

Level III

Creepage distance

[cm/kV]

2.5

2.5

2.75

Ice coating

[mm]

10

10

10

Wind speed

[m/s]

34

34

34

Earthquake resistance

[g]

0.3

0.3

0.3

Static force on the terminals

Longitudinal [N]

750

750

750

Transversal [N]

500

500

500

Vertical [N]

750

750

750

(1) For lower operating temperatures, please consult us.


Best solution for your power!
Copyright © 2018 Rockwill Electric Group Co.,Ltd. All Rights Reserved.