Type WSTI Three Phase Off Load Tap Changer(star connection)
This kind of switch applies to the three-phase combination oil-immersed transformer electrical power with rated voltage of 10KV-24KV, rated current of 30A-63A; the voltage-regulating mode are: central part, terminal point ncutral point, which can be dircctly fixed on the tank cover of the transformer, exchange under the off-circuit condition.
Type WSTI three phase-tap changer(star connection)
- Used in mineral oil or silicon oil
- Rated Voltage 10KV-24KV
- Rated current from 30A-63A
- Tapping position: 3-7
- Regulation 2.5% per position
Model Explanation
WST □ - □/□-□╳□
W: off-circuit
S : three-phase or D for single phase
T : linear type tap changer
□: voltage regulation model
□: rated current
□: rated voltage
□: number of tapping heads
□: number of tapping position
Voltage Regulation Model
I : terminal point
II : central point
III : neutral point
IV : Y-△ conversion
V : series-parallel connection
Our Advantage
* High pressure capability
* Strong anti-aging ability
* Strong anti-lightning impact
* Strong protection
* Use smoothly
* Stable use
| Number of positions |
Rated voltage |
Rated current |
L | B | C | D | n | φd1 | φd2 | H |
| 3 | 10 kV | 30A | 423 | 71 | 71 | 71 | 2 | φ3.1 | φ5 | H=70、100、130、 150、200 (At user's option) |
| 63A | φ5.1 | φ7 | ||||||||
| 24 kV | 30A | 423 | 71 | 71 | 71 | 2 | φ3.1 | φ5 | ||
| 63A | φ5.1 | φ7 | ||||||||
| 5 | 10 kV | 30A | 531 | 71 | 71 | 71 | 4 | φ3.1 | φ5 | |
| 63A | φ5.1 | φ7 | ||||||||
| 24 kV | 30A | 531 | 71 | 71 | 71 | 4 | φ3.1 | φ5 | ||
| 63A | φ5.1 | φ7 | ||||||||
| 7 | 10 kV | 30A | 639 | 71 | 71 | 71 | 6 | φ3.1 | φ5 | |
| 63A | φ5.1 | φ7 | ||||||||
| 24 kV | 30A | 639 | 71 | 71 | 71 | 6 | φ3.1 | φ5 | ||
| 63A | φ5.1 | φ7 |
