Overview
LW36-40.5(W)/T2000-31.5 outdoor sulfur hexafluoride circuit breaker is an electrical device in an AC 50Hz three-phase power system. It is suitable for control and protection in power systems with a rated voltage of 40.5 kV. It is included with the external current transformer, which is available for measurement and protection.
Model meaning
L— SF6 circuit breaker
W— Outdoor
36— Design Number
40.5— Rated voltage (kV)
W— Antifouling type
T— Spring operating mechanism
2000— Rated current (A)
31.5— Rated short circuit breaking current (kA)
Structural features
The LW36-40.5 sulfur hexafluoride circuit breaker is an outdoor porcelain bottle pillar structure, equipped with a CT35 spring operating mechanism. The mechanism and the body are arranged in a “丅” shape. The whole machine is small in size, light in weight, simple in structure, and has low operating power. Easy to install and debug. The mechanical life is 10,000 times, suitable for frequent operations; it adopts a compressed air arc extinguishing chamber, with excellent breaking performance and an electrical life of 20 times; the sealing performance is reliable, the static seal adopts “O” type sealing ring structure, and the dynamic seal adopts “V” type sealing ring structure. The sealing ring has a spring-pressure compensation structure. The secondary wiring board of the transformer is produced using a pressure injection process, which has strong anti-aging performance and ensures that the annual air leakage rate is ≤0.5%; the installation chassis and supports are made of integral rolled steel plates and use high-strength standard parts to ensure high mechanical reliability. : The metering-grade iron core of the internal or external current transformer is made of microcrystalline alloy material with high magnetic permeability, and the accuracy level can reach 0.2 level or 0.2S level. Each phase of the product can be equipped with 2~4 current transformers.
Technical Parameters
| Serial number | name | data | |
|---|---|---|---|
| 1 | Rated voltage (KV) | 40.5 | |
| 2 | Rating current (A) | 1600/2000 | |
| 3 | Rated insulation level | Work frequency resistance (KV) | 95 |
| Lightning impact resistance (KV) | 185 | ||
| 4 | The rated short -circuit open current (KA) | 25/31.5 | |
| 5 | Break -up current (KA) | 7.9/10 | |
| 6 | Different phase failure open current (KA) (KA) | 27.4/34.8 | |
| 7 | Rated breaking current of a single capacitor bank (A) | 400 | |
| 8 | Rated operation sequence | O-O.3S-CO-180S-CO | |
| 9 | SF6 gas-rated voltage (MPa) | 0.45 | |
| 10 | Opening-time ms (salivating voltage) | 30≤t≤40 | |
| 11 | Closing-time ms (rated voltage) | 60≤t≤80 | |
| 12 | Rated short-circuit current (peak value) | 63/80 | |
| 13 | The rated short-circuit duration (s) | 4 | |
| 14 | Rating short-term tolerance current (KA) | 25/31.5 | |
| 15 | The rated peak tolerance current (KA) | 63/80 | |
| 16 | Mechanical life test (times) | 10000 | |
| 17 | The rated channel opens current 31.5ka/40ka cumulative number of disconnection (times) | 20 | |
| 18 | The cumulative frequency of the rated current (times) | 2000 | |
| 19 | SF6 gas annual air leakage rate (%) | ≤0.5 | |
| 20 | SF6 gas trace water content (V/V) | ≤150 | |
| 21 | The exterior insulation leakage distance (mm/KV) | ≥25、 ≥31 | |
| 22 | Director weight (KG ≥) | 1000 | |
Ordering instructions
Circuit breaker model and specifications;
Rated electrical parameters (voltage, current, breaking current, etc.) operating environment conditions (ambient temperature, altitude, environmental pollution level); rated control loop electrical parameters (rated voltage of energy storage motor, rated voltage of opening and closing coil); required Name and number of spare parts, spare parts and special equipment and tools (need to be ordered separately)
Outline dimension drawing
