AC voltage regulator
ST-W4 servo automatic voltage regulators
Servo motor-type household AC voltage stabilizers. The catalogue describes low power consumption, reliable work and high accuracy of stabilization, intended for regions where the mains voltage fluctuates widely.
5Catalogue models
500W – 3,000WCatalogue power range
7–8Catalogue pages
1989Goldsource founded
1Exterior 3D models
Reconstructed exterior
Every side,
square on.
Illustrative renders reconstructed from catalogue photographs; dimensions are estimated. Appearance and configuration may vary by version.
Interactive exterior
ST-500W4,
in the round.
Illustrative exterior model reconstructed from catalogue photographs. Appearance and configuration may vary by version.
Drag to rotate · Scroll to zoom
Illustrative exterior model. Appearance and configuration may vary by version; check against the current product specification.
Historical catalogue record
What the catalogue says.
What to confirm.
- Product category
- AC voltage regulator
- Series
- ST-W4
- Catalogue models
- 5
- Source
- Catalogue PDF pages 7–8
- Source
- Company website archive (2014)
- Source
- DIYTrade listing (2025)
- Current specifications & availability
- Confirm by enquiry
Features as printed in the catalogue
- Input voltage: AC 50–130V or 160–250V
- Output voltage: AC 220V / 110V ±4%
- With over-current protector
- With output voltage indication
- With 110V / 220V input voltage selector switch
Catalogue values are historical reference information, not confirmed current specifications. Confirm the exact model, ratings, input range and certification status before ordering.
ST-W4 catalogue models.
| Model | Rated power | External package size | Net weight | Gross weight | Pieces per carton |
|---|---|---|---|---|---|
| ST-500W4 | 500W | 47.5 × 43.5 × 19.0 cm | 14.5 kg | 15.5 kg | 4 |
| ST-1000W4 | 1000W | 55.5 × 45.0 × 22.0 cm | 18.5 kg | 19.5 kg | 4 |
| ST-1500W4 | 1500W | 49.5 × 32.5 × 24.5 cm | 11.5 kg | 12.5 kg | 2 |
| ST-2000W4 | 2000W | 39.0 × 37.0 × 58.0 cm | 20 kg | 22 kg | 2 |
| ST-3000W4 | 3000W | 39.0 × 37.0 × 58.0 cm | 23 kg | 24 kg | 2 |
Sizes are external package sizes in cm; weights in kg; quantities are pieces per carton.
