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LW36-72.5 / 126 Outdoor HV. AC. SF6 circuit breaker
Published in2018-08-18
6685 ViewsDetailed 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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