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LW36-72.5 / 126 Outdoor HV. AC. SF6 circuit breaker

LW36-72.5 / 126 Outdoor HV. AC. SF6 circuit breaker

LW36-72.5 / 126 Outdoor HV. AC. SF6 circuit breaker

Product Description LW36-72.5 Outdoor HV AC. SF6 circuit breaker is an outdoor three-phase porcelain?column electrical equipment mainly used in AC 50Hz or 60 Hz, 72.5kV/126KV electrical system in extremely cold regions (for electric stations in gene
Published in2018-08-18
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Detailed description

Product Description

LW36-72.5 Outdoor HV AC. SF6 circuit breaker is an outdoor three-phase porcelain?column electrical equipment

mainly used in AC 50Hz or 60 Hz, 72.5kV/126KV electrical system in extremely cold regions (for electric stations in general regions and -40C extremely cold regions).

Applied Standards

IEC62271-100?????? HV Alternating Current Circuit Breaker
GB311-2002????????? Usage Rule of HV Distribution and Insulate Apparatus
GB/T16927-1997?? HV Testing Technology
GB1984-2003??????? HV Alternate Current Circuit Breaker
GB3309-1989??????? HV Switchgear Mechanical Testing under Normal Temperature
GB4473-1996??????? HV Alternate Current Circuit Breaker Compound Testing
GB5582-1993??????? HV Electric Apparatus Outer Insulating with Pollution Grade
GB11022-1999????? Common Technical Requirements of HV Switchgear and Control Apparatus
GB11023-1989????? HV switchgear SF6 Air-proof Testing Guide
GB/T8905-1996???? Electrical Management and Checking Guide of SF6 Electric Apparatus
GB12022-1989????? Industrial Using SF6


Ambient condition

1. Altitude: 1000m (high-altitude is of particular order);
2. Ambient temperature: -25 degree ~+40 degree?(under -25 degree?is of particular order);
3. Maximum wind speed: 34m/s;
4. Earthquake intensity: 8 degree;
5. Pollution degree: III(25mm/kV).


Product feature

1. Arc-extinguish chamber is of good breaking performance;
2. Long electrical life and high insulating capability;
3. Dependable mechanical and litter maintenance;
4. Low noise pollution;
5. Simple installation and debug;
6. Dependable air-proof feature;
7. Long mechanical life and long term of maintenance free;
8. Safe and reliable operation.


Structural features



--- High performance:? strong rated circuilating ability : strong short-circuit breaking ability at? 3150A,? -40degree 40kA
--- Long service life:? electrical endurance 31.5kA X 21 times
25kA??? x 31 times
mechanical life: ? ? ? 10000 times

--- High reliablity: sharing the arc extingushing chamber structure with LW36-126, great product internal insulation
redundancy, overall cast aluminum alloy frame adopted for the spring structure, simple structure and high
reliablity, suitable for frequent operations.
--- Reliable breakeing performance
--- Reliable sealing performance: Annual leakage of SF6 gas? less than 0.5%

Table of main parameters of circuit breaker

No.

Item

Unit

Parameter

1

Rated voltage

kV

72.5

2

Rated power frequency withstand voltage (1 min )

To earth /phase to phase

kV

160

Across switching device

160+42

3

Rated lightning impulse withstand voltage

To earth /phase to phase

kV

380

Across switching device

380+59

4

Rated frequency

Hz

50

50/60

5

Rated current

A

3150

6

Rated short-circuit breaking current Isc

31.50

40

7

Rated short-circuit making current (peak)

80

100/104

8

Rated short-time withstand current

kA

31.50

40

9

Rated peak withstand current

kA

80

100/104

10

Rated out-of-phase breaking current

kA

8

10

11

Short-line fault breaking current

kA

90%Isc, 75%ISC

12

Double earth fault breaking current

kA

27.4

34.8

13

Times of rated short-circuit breaking current

times

21

20

14

Rated duration of short-circuit

s

4

4

15

First pole to clear factor

1.5

1.5

16

Rated line charging breaking current

A

10

10

17

Rated operation sequence

O-0.3s-CO-180s-CO

18

Rated SF6 gas pressure/Gas refilling alarm pressure/Operation lockout pressure (gauge pressure, 20oC)

MPa

0.4/0.36/0.32

0.4/0.36/0.32 or 0.7/0.65/0.60

19

Annual leakage of SF6 Gas

%

≤0.5

20

SF6 gas humidity content (L/l) ((20oC)

L/L

≤150x10-6

21

Mechanical endurance

Times

6000

22

Opening time

Ms

≤30

23

Close-Open time

Ms

≥70(when running)

24

Creepage distance

Across switching device

mm

≥2585

To earth/phase to phase

≥2248

25

Weight of SF6 gas filled for one set of CB

Kg

6

6/8

26

Weight of one set of CB

1300


Table 2? Major Technical parameters of mechanism


No. Name Unit Data
1 Energy-store motor Normal voltage rang V 85%--- 110%
Rated voltage
DC220/AC220
Rated power W 720
2 Storage time (at rated voltage) s ≤20
3 Rated voltage/current of opening coil V/A DC110V/4A, DC220V/2A
AC220V/5A
4
Auxiliary
Switch
Rated current A 3(DC220V)/5 (DC110V)
Number of auxiliary contacts: normally opened/closed Pair 11/11
5 Trip switch Rated current A 3(DC220V)/5 (DC110V)
Number of auxiliary contacts: normally opened/closed Pair 2/2
6 Capacity of terminal carry continuous current A 10
7 Voltage of heater and lighting circuit V AC220
8 Mechanical endurance Times 10000








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