24/33/110/126/132kV SF6 (Vacuum) Circuit Breaker
Description:
LW36 model is outdoor SF6 (Vacuum) circuit breaker using sulfur hexafluoride gas or vacuum as the arc extinguishing and insulating medium and adopts the most advanced self-energy arc-extinguishing technology. It has the characteristics of long electrical life, low operating power and high reliability.
Guaranteed Technical Parameters
Description | Unit | Guaranteed Values | |||
| Rated voltage | kV | 24 | 36 | 40.5 | |
| Rated insulation level | Lightning impulse withstand voltage (full wave peak) | kV | 150 | 170 | 210*/215 (fracture) 185 |
| Power frequency withstand voltage (1 minute) | kV | 65 | 75 | 95 | |
| Rated current | A | 1250/1600/2000/2500 | |||
| Mechanical life | Operations | 10000 | |||
| SF6 gas rated pressure (25 gauge pressure) | MPa | 0.45 | |||
| Blocking pressure (time gauge pressure) | MPa | 0.40 | |||
| Maximum 4 ℃ ambient temperature | ℃ | -30 | |||
| Rated short circuit breaking current | kA | 20/25/31.5/40 | |||
| Rated short circuit making current (peak value) | kA | 50/63/80/100 | |||
| Rated short time withstand current (thermal stability current) | kA | 20/25/31.5/40 | |||
| Rated peak withstand current (dynamic stability current) | kA | 50/63/80/100 | |||
| Rated out of step breaking current | kA | 50/63/80/100 | |||
| Rated short circuit duration | s | 4 | |||
| Closing time (at rated operating voltage) | ms | ≤80 | ≤80 | ≤100 | |
| Opening time (under rated operating voltage) | ms | ≤65 | ≤65 | ≤70 | |
| Rated operating sequence | 0-0.3s-CO-180s-CO | ||||
| Rated switching current of single capacitor bank | A | 400 | |||
| Annual air leakage rate | %/year | ≤1 | |||
| Water content of SF6 gas (at 20 ℃) | ppm (V/V) | ≤150 | |||
| Rated operating voltage of CT14 spring operating mechanism | V | DC: 110, 220 AC; 110, 220, 380 | |||
| Closing coil and breaking coil voltage | V | DC: 110, 220 AC; 110, 220, 380 | |||
| Voltage of energy storage motor | V | AC: 220, DC: 220 | |||
| Closing speed | m/s | 3.2 ± 0.2 | 3.2 ± 0.2 | 3.2 ± 0.2 | |
| Opening speed | m/s | 3.4±0.2 | 3.4±0.2 | 3.4±0.2 | |
| Weight of sulfur hexafluoride gas | kg | 7-8 | |||
| Weight of circuit breaker (including operating mechanism) | kg | 800/900/1400 | |||
No. | Description of Parameters | Unit | Value | |
1 | Rated voltage | KV | 126 | |
2 | Rated current | A | 3150 | |
3 | Rated frequency | HZ | 50 | |
4 | First pole to clear factor | 1.5 | ||
5 | Rated short circuit breaking current | KA | 40 | |
6 | Rated short-circuit current (peak) | KA | 100 | |
7 | Rated short-circuit withstand current | KA | 40 | |
8 | Rated power frequency withstand voltage (1min) | Phase to earth | KV | K·230 |
| Phase to phase | K·(230+70) | |||
9 | Rated lightning impulse withstand voltage | Phase to earth | KV | K·550 |
| Phase to phase | K·(550+103) | |||
10 | Rated peak withstand current | KA | 100 | |
11 | Rated out of step current | KA | 10 | |
12 | Close fault current | KA | 90%1K | |
13 | Electrical life of rated short circuit breaking current | times | 20 | |
14 | Rated short circuit duration | s | 4 | |
15 | Rated line charging close current | A | 31.5 | |
16 | Rated operation sequence | O-0.3s-CO-180s-CO35 | ||
17 | Main circuit resistance | μΩ | ≤35 | |
18 | Rated SF6 gas pressure | MPa | 0.6 | |
19 | SF6 gas leakage rate | ppm | ≤0.55 | |
20 | Moisture content of SF6 gas (V/V) | ≤150 | ||
21 | Mechanical life | times | 10000 | |
22 | Electric distance | Phase to earth | mm | 3906/3150 |
| Phase to phase | 3906/3150 | |||
23 | Each filled with SF6 gas quality | kg | 8 | |
24 | Quality of each circuit breaker | kg | ~ 1700 | |
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GIS SF6 Circuit Breaker Mechanism:
High Voltage AC Circuit Breaker Types and Working:
Substations: Basic Principles | Circuit Breakers | Disconnectors | Relays | CTs & VTs | Arresters:
Difference between Circuit breaker and Isolator: