SF6 circuit breaker LW36A(B)BEL-126
High voltage SF6 circuit-breaker LW36A(B)BEL-126 is used in 110kV 50Hz grid.
Manufacturer: "AES-komplekt" (Belarus)
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Описание
Type designation:
37BEL_126.jpg)
Circuit breaker operates using arc extinguishing principle of short circuit in SF6 chamber. Operating mechanism is spring motor, type СТ30.
Main characteristics of circuit breaker:
- high short circuit arc extinguishing capacity,
- low power consumption,
- high reliability.
Normal operating conditions shall meet the requirements of GB11022-99 («General technical requirements for high voltage switchgear and controlgear) namely:
- Ambient temperature:
Design. I: −40°С~+40°С;
Design. II: −45°С~+40°С;
Design. II: −60°С~+40°С*. - Altitude above sea level <2500 m.
- Wind speed: 34 m/sec.
- Daily temperature difference: 25°.
- Ice thickness: 10 mm (20 mm).
- Installation: outdoor.
- Creepage distance: III class 25 mm/kV; IV class 31 mm/kV.
Документация
Технические характеристики
Design: 3 porcelain poles-phases for outdoor installation on CB frame with stands. Three-phase spring operating mechanism is installed in the box of circuit breaker located in the center. Circuit breaker is filled with SF6 gas and has the main function of arc extinguishing in SF6 medium. SF6 density control device is used to control density and pressure of SF6. Due to improved energy storage efficiency and optimization of kinetic system of circuit-breaker the mechanical efficiency of CB is improved and power consumption is decreased.
| # | Name | Unit | Value | |||
|---|---|---|---|---|---|---|
| 1 | Rated voltage | kV | 126 (145) | |||
| 2 |
1min PF withstand voltage To ground Between contacts |
kV |
230/275 265/315 |
|||
| 3 |
Lightning impulse withstand voltage To ground Between contacts |
kV |
550/650 630/750 |
|||
| 4 | Rated frequency | Hz | 50 | |||
| 5 | Rated current | A | 2000/3150 | |||
| 6 | Rated short circuit breaking current | kA | 31.5/40 | |||
| 7 | Electrodynamic withstand current | kA | 80/100 | |||
| 8 | Rated thermal withstand current 4sec | kA | 31,5/40 | |||
| 9 | Rated peak current | kA | 80/100 | |||
| 10 | Rated duration of current | sec | 4 | |||
| 11 | Switching cycle | O-0.3s-CO-180(20)s-CO | ||||
| 12 |
Opening time actual opening time complete opening time |
ms |
30+3 45 и 60* |
|||
| 13 | Opening time | ms | 75 | |||
| 14 | Closing opening time | ms | ≤60 | |||
| 15 | Primary circuit resistance | mcOhm | ≤40 | |||
| 16 | Rated SF6 pressure | mPa | 0.6 (0.5) | |||
| 17 | Annual SF6 leakage | % | ≤0.5 | |||
| 18 | Mechanical life | cycles | 6000 (10000*) | |||
*shall be confirmed with «AES-komplekt»
| # | parameter | unit | value | |
|---|---|---|---|---|
| 1 | Secondary circuits voltage | V | DC 220 | |
| 2 | Rated operating voltage of opening/closing coils | V | DC 220 | |
| 3 | Rated operating current of opening/closing coils | A | 2 | |
| 4 |
Motor of winding of spring Rated voltage Rated operating range Capacity |
V V W
|
|
|
| 5 | Time of energy accumulation of motor spring | s | <15 | |
| 6 | Torque of manual accumulation of energy | N/m | 530 | |
| 7 | Voltage of light and heating circuits | V | AC220 | |
| 8 | Rated voltage of auxiliary contacts | V | DC 220 | |
| 9 | Rated current of auxiliary contacts | A | 10 | |
- Pole (porcelain).
- Base/foundation.
- Density control indicator.
- Control box.
- Nameplate.
