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40.5kV SF6 Circuit Breaker GPFN Series

Short Description:

GPFN series high voltage AC sulfur hexafluoride(SF6) circuit breaker (hereinafter referred to as circuit breaker) is a three-phase AC 50Hz indoor switchgear. It is a new generation of SF6 circuit breaker independently developed by our company based on the advanced SF6 breaking technology at home and abroad. It has the characteristics of light and compact structure, easy installation, less maintenance workload, safe and reliable operation, long service life and excellent insulation and arc extinguishing characteristics. and opening and closing capacitor banks.

The pole interrupter of the circuit breaker, that is, the arc extinguishing chamber part, is a closed system that is maintenance-free for life. It is not affected by dust and condensation, and has strong environmental adaptability. The operation and maintenance costs are reduced; the independent structure of each pole of the circuit breaker and the operating mechanism are installed on the same rigid base, which can be used as a fixed installation unit or with a special propulsion mechanism to form a handcart unit. The light and compact circuit breaker structure guarantees its sturdiness and reliability.


Product Detail

Product Tags

Model and Meaning

4

Use Environmental Conditions

a. Altitude: no more than 1000m
b. Ambient temperature: -15℃~+40℃, the daily average temperature does not exceed +35℃
c. Environmental humidity: daily average relative humidity: ≤95% monthly average relative humidity: ≤90%
Daily average vapor pressure: ≤2.2x10-3 MPa Monthly average vapor pressure: ≤1.8x10-3MPa
d. Earthquake intensity: no more than 8 degrees
e. Location of use: Ambient air is not appreciably polluted by dust, smoke, corrosive and/or flammable gases, vapors or salt mist.
Note: When the actual use environment does not meet the above conditions, please consult with our company.

Technical Parameter

No.

Items

Unit

Data

1

Rated voltage

kV

40.5

2

Rated frequency

Hz

50

3

1min power frequency withstand voltage

Between poles, To earth

kV

95

Fractures

118

Lightning impulse

withstand voltage
(peak)

Between poles, To earth

185

Fractures

215

4

Rated current

A

1250  1600  2000  2500

5

Rated short-time withstand current (RMS)

kA

25

31.5

6

Rated peak withstand current

63

80

7

Rated short-circuit breaking current (RMS)

25

31.5

8

Rated short-circuit making current (peak value)

63

80

9

Rated short circuit duration

s

4

10

Rated sequence of operations

 

O-0.3s-CO-180s-CO

11

Rated out-of-phase earth fault breaking current

kA

21.7

27.4

12

Rated cable charging current switching test

A

50

13

Rated single/back-to-back capacitor bank breaking current

800/800

14

Mechanical life

times

10000

15

Short circuit current breaking times

times

30

16

Secondary circuit 1 min power frequency withstand voltage

 

2000

17

Rated operating voltage

Closing coil

V

DC110/220, AC220

Opening coil

V

DC110/220, AC220

18

Rated voltage of energy storage motor

W

DC110/220, AC220

19

Rated power of energy storage motor

s

250

20

Energy storage time (rated voltage)

s

≤10

21

Rated pressure of SF6 gas (gauge pressure at 20°C)

Mpa

0.350+0.02

22

Alarm pressure

Mpa

0.29±0.01

23

Minimum functional pressure (blocking pressure)

Mpa

0.28±0.01

24

Annual leak rate

%

≤0.5

25

Gas moisture content

 μL/L

≤150

26

Moving contact stroke

mm

≥78

27

Contact Spacing

mm

50±1.5

28

Opening time

ms

60~78

29

Closing time

ms

65~95

30

Three-phase closing and opening are not periodic

 

≤5

31

Average opening speed (within 10ms after halfway)

ms

2.2~2.8

32

Average closing speed (within 10ms after half-way)

ms

≥1.5

33

Main conductive loop resistance

μΩ

≤32(Handcart)

≤20(Fixed type)

Main Structure

5

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