overview
LW36-145/3150-40 self-energy AC high-voltage sulfur hexafluoride circuit breaker is an outdoor product, suitable for the power grid with an altitude of no more than 3000 meters, an ambient temperature not lower than -40 °C, a pollution level not higher than that of an IV area, and a maximum voltage of 145kV. The product uses SF6 gas as the arc extinguishing and insulating medium, adopts the most advanced self-energy arc extinguishing technology in the world, and uses a new type of elastic operating mechanism that has the characteristics of long electric life, small operating power, low noise and high reliability. Its simple structure, small size, long maintenance cycle is the most reliable product in high altitude areas or 132kV power system, and can replace the same type of imported products.
Model meaning
Structural features
The circuit breaker adopts a three-phase porcelain column type single-break structure, and the three-phase is equipped with a spring operating mechanism, which is arranged in the center, and a three-way connection, so the appearance is novel and exquisite. The circuit breaker uses SF6 gas as the insulation and arc extinguishing medium, and the three-pole SF6 gas of the circuit breaker is connected during operation, and the pressure and density progress of the pointer density relay are monitored. Due to the adoption of the principle of self-energy arc extinguishing and the optimized design of the circuit breaker motion system, the mechanical efficiency is effectively improved and the operating work is minimized. Excellent breaking performance and long electrical life; The installation base frame and support are made of high-quality steel plate bent as a whole, the surface treatment is all made of hot-dip galvanizing process, all exposed fasteners are made of high-strength materials and hot-dip galvanized treatment, or stainless steel standard parts are used, and the shell of the mechanism box is made of stainless steel, so the corrosion resistance of the product is excellent; High mechanical reliability and frequent operation; Due to the inherent high dielectric strength of SF6 gas and the optimal contact movement of the circuit breaker, there is no re-ignition of the capacitive current of the circuit breaker; The external insulation level is high, the external insulation is designed with a large creepage distance, the creepage ratio distance is ≥31mm/kV, and the pollution resistance is excellent. Safe operation in harsh environments; Strong current-carrying capacity: the temperature rise test is carried out according to 1.2 times of the rated current of 3150A, that is, 3780A, and the temperature rise at each point still has a large margin; The overall appearance of the product is compact, easy to install and debug on site, and the maintenance workload is small.
Technical parameters
The main technical parameters of the circuit breaker
| Serial number | name | unit | parameter | |
|---|---|---|---|---|
| 1.0 | Rated voltage | kV | LW36-145KV | |
| 2.0 | Insulation level | kV | See Table 2 | |
| 3.0 | Rated frequency | Hz | 50 | |
| 4.0 | Rated current | A | 3150 | |
| 5.0 | The rated short-circuit open current | kA | 40 | |
| 6.0 | The rated short-term tolerance current | kA | 40 | |
| 7.0 | The rated peak tolerance current | kA | 100 | |
| 8.0 | The rated short-circuit duration | s | 3 | |
| 9.0 | The rated short-circuit level-off current (peak value) | kA | 100 | |
| 10.0 | Near-district fault opening break current | kA | 36/30 | |
| 11.0 | The rated line charging open current | A | 31.5 | |
| 12.0 | The rated fixed steady opens the current | kA | 10 | |
| 13.0 | The cumulative number of disconnection times under the short-circuited current | Second-rate | 20 | |
| 14.0 | Extremely Facto | 1.5 | ||
| 15.0 | SF6 gas pressure (20 ° C) | MPa | 0.5 | |
| 16.0 | Control loop and auxiliary circuit power supply rated voltage | DC220V DC110V | ||
| 17.0 | Rated operation sequence | Society -0.3S-Section -180s-combined score | ||
| 18.0 | Mechanical characteristics | See Table 5 | ||
| 19.0 | The rated main circuit resistance | μΩ | ≤55 | |
| 20.0 | Detailing of circuit breaking machinery | Second-rate | 10000 | |
| 21.0 | Wiring terminal static pull power | Horizontal vertical FSHA | N | 1250 |
| Horizontal horizontal FSHB | N | 750 | ||
| Vertical direction FTVM | N | 1000 | ||
| 22.0 | SF6 gas annual air leakage rate | % | ≤1 | |
| 23.0 | SF6 gas moisture content (V/V) | ppm | ≤150±4 | |
| 24.0 | Contact | mm | 150±4 | |
| 25.0 | Contact contact stroke | mm | 25±3 | |
Insulation level
| Serial number | name | parameter | |
|---|---|---|---|
| 1 | 1 min industrial frequency tolerance voltage (effective value, dry test, wet test) | KV between breaks | 230 |
| Extremely or polar to ground KV | 230 | ||
| 2 | 1 min industrial frequency tolerance voltage (effective value, dry test, wet test) | KV between breaks | 550 |
| Extremely or polar to ground KV | 550 | ||
| 3 | When SF6 gas zero -meter voltage, 5min industrial frequency tolerance voltage (valid value) | KV between breaks | 95 |
| Extremely or polar to ground KV | 95 | ||
| Note: | Serial number 1, serial number 2 parameters are the insulation level of 2000m altitude | ||
Schematic diagram of appearance and installation
See diagram below
LW36-145 circuit breaker weight: 1800kg
Windward area: 5m²
Ordering instructions
circuit breaker model and specification; Rated electrical parameters (voltage, current, breaking current, etc.) Environmental 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); The name and quantity of spare parts, spare parts and special equipment and tools required (separate orders are required); The wiring direction of the upper terminal at the time.
