The 33kv outdoor circuit breaker is a 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.lt 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 33kV 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 LW8-33 breaker is the regenerate type of oil type breaker.
Meaning of Type
Characteristic of Structure
The outdoor breaker has the characteristics of small, outdoor type and with the console pot structure. It can match with CT 14 spring operation mechanism. The spring operation mechanism associates with the main body, so the installation and debugging are convenient.Also it can be operated frequently and the mechanical life is not less than 3000 times.
The hv breaker uses pneumatic arc-extinguishing chamber.so the breaking performance is excellent.The 40kA accumulative breaking times can reach to 12.
The seal performance is reliable.The breaker uses imported sealed rubber insert.The dynamic seal uses structure of V shape grommet with spring pressure.
The secondary terminal block is offered by the manufacturer as a set with the breaker to make sure that the annual leak rate of SF6<0.5%.
The iron core of the inner current transformer is made of materials with the performance of crystallite(alloy)high conduction magnetic. So the accuracy class can reach up to 0.2 or 0.2S.12 pieces of current transformers can be used inside as the clients’requirement. And it will not re-burn when switch zero load for 50kms.
Rated insulation level
Thunder impulse withstand (Full peak values
Power frequency withstand voltage(1 min
Rated SF6 pressure (20℃
Locking pressure (20℃)
Minimum operating ambient temperature
Rated short-circuit breaking current
Rated short-circuit makingg current(peak)
Rated short time withstand current (thermal stability current)
Rated short time withstand current (dynamic stability current)
Rated out of phase breaking curren
Rated short-circuit duration
Switch-on time (rated operating voltage
Switch-off time (rated operating voltage
Rated operating sequence
Rated switching single capacitor bank current
Cumulative breaking times of rated short-circuit breaking current
Annual leakage rate
SF6 water content (VV)
Rated operating voltage matching with CT14 spring operating mechanism