LW8-40.5
High Voltage Circuit Breakers
Electric Type
High-Speed Circuit Breaker
SF6
Fixed
ACB
1
Circuit Breaker
Conventional Circuit Breaker, Circuit-Breaker Failure Protection, Overcurrent Protection, OVP(Overvoltage Protection), RCCB
ISO9001-2000, CCC
Bdn
Zhe Jiang
3
2000 Times
4s
5-1600
Casting Insulation
BDN
Wooden Case
medium
China
853620
Product Description
AC HV SF6 breaker is kind of 3 phase AC 50HZ outdoor type breakers. The gas of the SF6 is employed as the arc-extinguishing medium and the dielectric material. It uses the structure of pneumatic arc-extinguishing chamber,and the breaking performance is excellent. It can be widely used in the electrical system whose rated voltage is 40.5kV to control the rated current and short-circuit current, connect the breaker and cut the current in capacitor banks. The current transformers inside are used for measuring and protecting the breaker. The LW8-40.5 breaker is the regenerate type of oil type breaker.
Altitude :≤3000m.
Ambient temperature :-30ºC~+40ºC.
Pollution grade: Class II, Class III, Class IV.
Relative humidity: the daily average is not more than 95%, the monthly average is not more than 90%(25ºC).
Wind pressure: not more than 700Pa(equivalent to 34m/s).
There are no inflammable substances, explosion hazards, chemical corrosion and violent vibration.
| Name | Unit | Data | |
| Rated voltage | KV | 40.5 | |
| Rated insulation level | Withstand voltage of 1min power frequency | KV | 95 |
| Lightning shock resistance (peak) | |||
| Rated current | A | 185 | |
| Mechanical life | Times | 1600/2000 | |
| Rated pressure of sulfur hexafluoride (gauge pressure at 20C) | Mpa | 3000 | |
| Locking pressure (gauge pressure at 20ºC) | Mpa | 0.45 | |
| Minimum operating temperature | ºC | 0.42 | |
| Rated short circuit breaking current | KA | -30 | |
| Rated short circuit shut-off current (peak) | KA | 20/25/31.5 | |
| Rated withstand current in short circuit (heat stable current) | KA | 63/80 | |
| Rated peak withstand current (dynamic stable current) | KA | 35/31.5/100 | |
| Rated out-of-step breaking current | KA | 63/80/100 | |
| Rated short circuit duration | S | 4 | |
| Closing time (at rated operating voltage) | S | ≤0.1 | |
| Switching time (at rated operating voltage) | S | ≤0.07 | |
| Rated operating sequence | 0-0.3-C0-180S-CO | ||
| Rated open and close current of a single capacitor bank | A | 400 | |
| Weight of sulfur hexafluoride gas | Kg | 8/5 | |
| Weight of circuit breaker (including operating mechanism) | Kg | 14000/1000 | |
