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GW4 Isolation Switch
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GW4 Isolation Switch
1. Overload protection
2. Short circuit protection
3. Controlling
4. Used in residential building, non-residential building, energy source industry and infrastructure.
5. According to the type of instantaneous release classified as follows : type B(3-5)ln, type C(5-10)ln, type D(10-20)ln
2. Short circuit protection
3. Controlling
4. Used in residential building, non-residential building, energy source industry and infrastructure.
5. According to the type of instantaneous release classified as follows : type B(3-5)ln, type C(5-10)ln, type D(10-20)ln
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Product Details
GW4 Outdoor Isolation Switch
GW4 outdoor MV isolation switch is used for three-phase AC 50Hz outdoor high-voltage electrical equipment, switching of lines under high-voltage no-load conditions, and electrically isolating electrical equipment such as high-voltage busbars, circuit breakers, and live high-voltage equipment for maintenance voltage lines , can also be used to switch small capacitor or inductor current. When the knife is in the normal open circuit position, it can provide insulation distance that meets safety requirements. Widely used in 35-110kV substations.
Selection
Technical data
| Item | Unit | Parameters | |||||
| GW4-40.5 | GW4-72.5 | GW4-126 | GW4-126G | GW4-145 | |||
| Rated voltage | KV | 40.5 | 72.5 | 126 | 126 | 145 | |
| Rated current | A | 630 1250 2000 2500 |
630 1250 2000 2500 4000 |
630 1250 2000 2500 |
630 1250 |
1250 2000 2500 |
|
| Rated short-time withstand current (RMS) | KA | 20 31.5 40(46) |
20 31.5 40(46) |
20 31.5 40(46) |
20 31.5 |
20 31.5 40(46) |
|
| Rated peak withstand current (peak) | KA | 50 80 100(104) |
50 80 100(104) |
50 80 100(104) |
50 80 |
50 80 100(104) |
|
| Rated short-time withstand voltage (effective value) | To the ground | KV | 80 | 140 | 185(230) | 185 | 375 |
| Fracture | 110 | 160 | 210(265) | 210 | 315 | ||
| Rated lightning impulse withstand voltage (peak) |
To the ground | KV | 185 | 325 | 450(550) | 450 | 650 |
| Fracture | 215 | 375 | 520(630) | 550 | 750 | ||
| Wiring terminal rated the horizontal tension |
490(735) | 735 | 735 | 735 | 960 | ||
| Weight of single pole | 80 | 200 | 240 | 300 | 300 | ||
Operating conditions
1. Ambient temperature: upper limit +40℃, lower limit -30℃
2. Altitude: no more than 3000m;
3. Wind speed: no more than 35m/s;
4. Earthquake intensity: do not exceed 8 degree;
5. Pollution level: no more than III class
6. No severe vibration, no corrosive gas, no fire, no explosion danger place.
Overall and mounting dimensions(mm)
1. Wiring terminal
2. Contact
3. Contact finger
4. Support insulator
5. Switch base
6. The main knife operating crank arm
7. The main knife vertical rod (galvanized steel pipe of φ45×45)
8. Anchor ear
9. The main knife operating mechanism (CJ6 or CS17)
10. Grounding contact finger
11. The earth knife vertical rod (galvanized steel pipe of φ45×5)
12. The earth knife operating mechanism (CJ78CS17)
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