| Breaking Capacity: | High Voltage Circuit Breakers |
|---|---|
| Operation: | Manual Type |
| Speed: | Normal Type Circuit Breaker |
| Arc-extinguishing Medium: | SF6 |
| Installation: | Fixed |
| Structure: | ACB |
| Customization: |
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Audited Supplier The LW 8A-40.5(W)T2000-31.5 outdoor type SF6 breaker finds its universal range of application for the three-phases electrical system with alternating current 50HZ and the rated voltage 40.5kV.It is used for contolling and protecting the electrical system and measuring the current transformers.
Model description
Technical Parameter
| 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 | |
|
Characteristic of structure |
1. The LW8-40.5 breaker has the structure which is outdoor porcelain post type. It can be matched with CT35 spring mechanism and has T shape .The circuit breaker is small and light and has good qualities with low operation power, lower noise, high reliability, simple structure. It is also convenient for the operator to install and debug the breaker. The mechanical life is not less than 10000times and the breaker can be operated frequently. 2. The breaker uses pneumatic arc-extinguishing chamber, so the breaking pertormance is excellent and the electrical life can reach up to 20 times. The sealbility is reliable. Static seal uses 0 shape grommet structure, while dynamic seal uses structure of V shape grommet with spring pressure. The secondary terminal block is produced by imported mould according to the pressure injection technologies. So it has high performance 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. It used high strength standard accessories and the mechanism is reliable. 4. The measure iron cove of the inner or outer curent 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. Every phase of the product can match with 2-4 pieces of current transformers. |
Q: Can we get a sample for reference?
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