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| Rated Voltage: | 110/126kV | Rated Current: | 3150A 40kA |
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| Frequency: | 50/60Hz | Insulation Gas: | SF6 |
| High Light: | high voltage vacuum circuit breaker,hv circuit breaker |
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110kV 126kV High Voltage Circuit Breaker 3150A - 40kA Sf6 Circuit Breaker
Product Description
LW39-126 type circuit breaker is a high performance new type HV SF6 circuit breaker. Based on sufficient absorbing and digesting advanced technology of foreign SF6 circuit breaker and requirement of national standard, It combining domestic commercial manufacture level and design. This product is used in electric system with 50Hz, 110kV system nominal voltage, which is main electrical equipment controlled and protected by power station and substation.
| Serial No. | Name | Unit | Value |
| 1 | Ambient temperature | ºC | -50ºC-40ºC |
| 2 | Rated voltage | KV | 126 |
| 3 | Rated power frequency withstand voltage (1min) | ||
| 3.1 | To earth | kV | 230 |
| 3.2 | Across open contact | kV | 230+73 |
| 4 | Rated lightning impulse withstand voltage | ||
| 4.1 | To earth | kV | 550 |
| 4.2 | Across open contact | kV | 550+103 |
| 5 | Rated frequency | Hz | 50 |
| 6 | Rated value | A | 3150 |
| 7 | First pole to clear factor | 1.5 | |
| 8 | Rated short-circuit breakering current (Isc) | kA | 40 |
| 9 | Rated short-circuit making current (peak) | kA | 100/104 |
| 10 | Rated hsort-time withstand current | kA | 40 |
| 11 | Rated peak withstand current | kA | 100/104 |
| 12 | Rated duration of short-circuit | s | 4 |
| 13 | Rated out of phase breaking current | kA | 10 |
| 14 | Short-line fault breaking current | kA | 90%Isc,75Isc |
| 15 | Rated line charging breaking current | A | 31.5 |
| 16 | Rated operating sequence | o-0.3s-CO-180s-CO | |
| 17 | Resistance of main contact | μΩ | ≤35 |
| 18 | Rated SF6 gas pressure (20ºC gauge pressure) | Mpa | 0.6 (or SF6+CF4) 50Hz |
| 19 | Alarm/ minimum functional pressure (20ºC gauge pressure) | Mpa | 0.55/0.50 50Hz |
| 20 | Annual leakage of SF6 gas | % | ≤0.5 |
| 21 | Gas humidity content (L/L) (20ºC at handover) | L/L | ≤150x10-6 |
| 22 | Mechanical endurance | Times | 10000 |
| 23 | Radio interference level | mv | ≤500 |
| 24 | Creepage distance | mm | 3906 |
| 25 | Weight of SF6 gas filled for each CB | kg | 8 |
| 26 | Weight of one set of CB | kg | 1700 |
Major Technical parameters of mechanism
| No. | Name | Unit | Data | ||
| 1 | Energy-store motor | Normal voltage rang | V | 85%--- 110% | |
| Rated voltage | DC220/AC220 | ||||
| Rated power | W | 720 | |||
| 2 | Storage time (at rated voltage) | s | ≤20 | ||
| 3 | Rated voltage/current of opening coil | V/A | DC110V/4A, DC220V/2A | ||
| AC220V/5A | |||||
| 4 | Auxiliary Switch |
Rated current | A | 3(DC220V)/5 (DC110V) | |
| Number of auxiliary contacts: normally opened/closed | Pair | 11/11 | |||
| 5 | Trip switch | Rated current | A | 3(DC220V)/5 (DC110V) | |
| Number of auxiliary contacts: normally opened/closed | Pair | 2/2 | |||
| 6 | Capacity of terminal carry continuous current | A | 10 | ||
| 7 | Voltage of heater and lighting circuit | V | AC220 | ||
| 8 | Mechanical endurance | Times | 10000 | ||
Contact Person: Ms. Lian Huanhuan
Tel: +86-13858385873
Fax: 86-574-87911400
