Three Phase Oil Cooled Servo Stabilizer
Provides a perfectly stable output even under severe, unbalanced voltage conditions — ideal for protecting electrical and electronic equipment from high and low voltage. Oil cooling enables heavy-duty, continuous-duty operation up to 2000 kVA.
- 3–2000 kVA
- ±1% regulation
- Oil cooled
- Continuous duty
- High efficiency & fast response
- Wide input voltage range with audible alarm for trip conditions
- 99.99% failure-proof control circuit
- No overshoots, undershoots or hunting
- Built-in bypass switch up to 30 kVA; on-load changeover above 30 kVA
- Fewer active components for lower failure rates
- Special electronic circuit to operate on gensets
- No effect from power-factor or frequency variations
- Single PCB for three-phase sensing and correction
- Variable-speed, high-torque DC servo motor for proportional correction
- Rugged AC motor drive controlled through a reliable optoisolator circuit
- High reliability via digital monitoring and control using a micro-controller
- All components from reputed manufacturers, conforming to IS / BS / VDE standards
- All raw material inspected as per the internal components manual
- Individual assemblies tested on full load at 55°C for 48 hours
- Final equipment subjected to accelerated life testing to replace any weak links
- Input & output low-voltage protection
- Input & output high-voltage protection
- Phase-reversal / single-phasing preventer
- Input protection using HRC fuse
- Control-circuit protection using fast-blow fuse
- Electronic overload protection
- Earth-fault protection
- Surge protection devices and surge arrestors
| Parameter | Specification |
|---|---|
| Single-phase capacity | 1 to 25 kVA |
| Three-phase (air cooled) | 3 to 150 kVA |
| Three-phase (oil cooled) | 3 to 2000 kVA |
| Input voltage range | 170–280 V (1φ) · 295–485 V (3φ) |
| Output voltage | 220 / 230 / 240 V (1φ) · 380 / 400 / 415 V (3φ) |
| Output voltage regulation | ±1% from no load to full load |
| Correction speed | Up to 105 V/sec (DC servo) |
| Response time | 10 ms (DC servo) |
| Operating frequency | 47 to 53 Hz |
| Output waveform | True reproduction of input |
| Insulation | Class B |
| Overload capacity | 120% for 1 minute |
| Efficiency | Better than 98% |
| Duty cycle | 100% continuous |
| Ambient | Up to 45°C · relative humidity up to 90% |
| Construction | As per IS:9815 |
| Enclosure | Powder coated |
| Mounting | On wheels |
| Earthing | Earthing terminals provided |
Good to know
Questions about Servo Stabilizers
Still have a question? Send us your requirement or call +91 99439 38348.
It depends on your connected load (in kVA), the number of phases and your input voltage range. Single-phase units cover 1–25 kVA, three-phase air-cooled 3–150 kVA and three-phase oil-cooled 3–2000 kVA. Share your load details and we will size it correctly.
Air-cooled units are compact and maintenance-friendly, ideal up to about 150 kVA. Oil-cooled units handle higher capacities and continuous heavy-duty loads up to 2000 kVA with better heat dissipation.
Our servo stabilizers hold the output to within ±1% from no load to full load, with correction speeds up to 105 V/sec on the DC servo drive.
Yes. We manufacture, deliver, install and service servo stabilizers across Coimbatore, Tirupur, Erode, Salem and the surrounding districts, with responsive after-sales support.
Yes. A special electronic circuit lets the stabilizer operate on gensets, and performance is unaffected by power-factor or frequency variations.