Photos of Product
General
GW4A-40.5 series improved outdoor high voltage AC disconnector (hereinafter referred to as "disconnector") 'it is an outdoor high-voltage switchgear with a rated frequency of 50Hz, which is used for switching 35kV line under voltage and no load, and for the electrical isolation of the overhauled high-voltage bus, circuit breaker and other electrical equipment from the live high-voltage line. It can also be used to close a very small capacitive current and inductive current.
The Isolation switch meets the technical standards of high voltage AC disconnectors and earthing switches (GB/T 1985-2014) and high voltage AC disconnectors and earthing switches (DL/T 486-2010).
Model And Meaning
Technical Parameters
No. |
Item |
Unit |
Data |
1 |
Rated Frequency |
Hz |
50 |
2 |
Rated Voltage |
kV |
40.5 |
3 |
Rated Current |
A |
630 |
1250 |
2000 |
2500 |
3150 |
4000 |
4
5 |
Rated Short-time Withstand Current
Rated Short-Time Withstand Current(Peak Value) |
kA |
20/4 |
31.5 |
40/50 |
50/63 |
80 |
100/125 |
6 |
Rated short-time power frequency withstand voltage |
kV/min |
95/1 (Interphase, to earth, dry-type) |
118/1 (Interphase, to earth, dry-type) |
95/1 (Interphase, to earth, dry-wet) |
7 |
Rated lightning impulse withstand voltage |
kV |
185 (Interphase, to earth) |
215 (Fracture) |
8 |
Rated Short-Time Withstand Current Continuous Time |
s |
4 (Isolation Switch) |
2 (Earthing Switch) |
9 |
Circuit resistance |
μΩ |
≤100 |
≤80 |
10 |
Matching operating mechanism |
Human Operational Mechanism |
|
CS14G (Without Earthing Switch) |
Main force CS14G, grounding force CS11 (with single/double grounding switch) |
Motor Operational Mechanism |
|
CJ6 type, motor voltage AC380V or DC220v, grounding voltage AC220V or DC220v, auxiliary contact 8 normally open and normally closed (standard configuration) |
|
11 |
Mechanical life |
Times |
2000 (Isolation Switch/Earthing Switch) |
12 |
Creepage distance |
mm |
≥372 (e - Level) |
Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate. |
Usage Environmental Conditions
- Altitude: no more than 1000m. If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.
- Ambient temperature: upper limit + 45 0C, lower limit - 40 0C, average temperature of the hottest month 30 0C, maximum daily temperature difference 25K.
- Solar radiation intensity (outdoor): 0.1W/cm2
- Wind speed / pressure (outdoor): 34m/s / 700Pa
- Pollution level: e-level
- Icing thickness: not more than 20mm
- Humidity: average daily relative humidity, not more than 95%, average monthly relative humidity not more than 80%
- Earthquake resistance: horizontal acceleration 0.3m/2, vertical acceleration 0.15m/s2
- Safety factor: sinusoidal resonance three cycle wave, safety factor above 1.67.
Main Advantages
- It adopts a perfect and improved design, no welding is required for installation, and the operation is simple and convenient.
- It adopts double column middle opening and contact transfer in structure, which has the ability of automatic contact cleaning and strong operation reliability.
- The contact finger uses high strength, high conductivity, and high elasticity materials, which can clamp the contact by relying on its own elasticity, avoiding the vicious cycle caused by the reduction of contact clamping force caused by spring corrosion and heating annealing, the increase of contact resistance and the intensification of contact heating.
- The insulator is made of high-strength porcelain material and designed with a large creepage distance. It has strong pollution resistance and environmental adaptability and can meet the operation requirements in high-altitude areas.
- The rotating part shall be designed according to maintenance-free requirements.
Outline And Installation Dimension