The LW 8A-40.5(W)T2000-31.5 outdoor type SF6 breaker finds its universalrange of application for the three-phases electrical with alternating current50HZ and the rated voltage 40.5kV.it is used for controlling and protecting theelectrical system asystemnd measuring the current transformers.
Product Description:
1. The LW8-40.5 breaker has the struclure which is outdoor porcelain post type. l can be matched with CT35 spring mechanism and has T sha.pe .The circuit breaker is small and ight and has good qualties with low operation power, lower noise, high relabiity, simple structure. it is alsoconvenient for the operalor to insta and debug the breaker. The mechanical ile is not less than 10000times and the breaker can be operatedfrequently.
2. The breaker uses pneumatic arc.extinguishing chamber, so the breaking performance is excellent and the electrical life can reach up to 20times, The sealabilty is relable. Static seal uses 0 shape grommet structure, while dynamic seal uses structure of V shape grommet with springpressure. The secondary terminal block is produced by impored mould according to he pressure inieclion technologies, So it has high peror.mance of ageing resistance and makes sure that the annual leakAge rate of SF6 < 0.5%.
3. The metal frame and the support of the circuit breaker are bended with a whole deep steel plate. t used high strength standard accessoriesand the mechanism is reliable.
4. The measure iron cove of the inner or outer curent transformer is made of materials with the performance of crystalite (ally) high conductionMagnelic, So the accuracy class can reach up to 0.2 or 0.2S, Every phase of the product can match with 2-4 pieces of current transformers
| Name | Data | |
| Rated voltage | 40.5 | |
| Rated current(A) | 1600/2000 | |
| Rated Insulate level | Power frequency withstand voltage(kV)1min | 95 |
| Thunder impulse withstand vltage (kV) | 185 | |
| Rated short-circuit breaking current(kA) | 25/31.5 | |
| Rated outof-phase breaking current (kA) | 7.9/10 | |
| breaking current of earth fault in different phase(kA) | 27.4/34.8 | |
| Rated breaking current of single capacitor bank(A) | 400 | |
| Rated Operating sequence | O-0.3S-CO-180S-CO | |
| Rated SF6 gas pressure(Mpa) | 0.5 | |
| Switch-off time(on rated voltage)(ms) | 30≤t≤40 | |
| Switch-on time(on rated voltage)(ms) | 60≤t≤80 | |
| Rated short-circuit making current(peak) (kA) | 63/80 | |
| Rated short-circuit duration (s) | 4 | |
| Rated short-circuit with stand current (kA) | 25/31.5 | |
| Rated peak value withstand current(kA) | 63/80 | |
| Mechanical life (time) | 10000 | |
| Cumulative breaking times of rated short-circuit
breaking current 31.5 kA/40kA(time) |
20 | |
| Cumulative breaking times of rated current(time) | 2000 | |
| Annual leakAge rate of SF6(%) | ≤0.5 | |
| Water content of SF6(V\V)(PPm) | ≤150 | |
| Outer insulating leakAge ratio distance(mm/kV) | ≥25,≥31 | |
| Weight of the circuit breaker(KG) | 1000 | |
Detailed Images
