Servo Stabilizers - Three Phase Air Cooled
Salient Features
- High efficiency & Fast response.
- Wide input voltage range & Audiable alarm for trip conditions.
- 99.99% failure proof control circuit.
- No over under, shoots and hunting.
- Built in bypass switch upto 100 KVA.
- Less active component avoids failure ratings.
- Special electronic circuit to operate on gensets.
- No effect of power factor and frequency variations.
- Single PCB for three phase sensing and correction.
- Voltage at speed related to rate of fluctuations and avoids oscillations & hunting In DC motor drive.
- Variable speed high torque DC servo motor proportionally controls corrections.
- Rugged and smooth ac motor drive control through optoisolator circuit which is Highly reliable.
- Separate isolated PCB for triac switching for motor.
High Reliability
- High reliability due to digital monitoring and controlling using micro controller.
- All components sourced from reputed manufacturers, confirm to IS / BS / VDU standards.
- All raw material inspection as per internal components manual.
- Individual assemblies and sub assemblies tested separately.
- All electronic assemblies tested on full load at 55 deg c in oven for 48 hours to Minimize failure.
- Final equipment tested for accelerated life test to identify and replace any weak links.
Protections
- Input and Output Low Voltage protections.
- Input and Output High Voltage protections.
- Phase rotation/single phasing preventer.
- Input protection using HRC fuse.
- Control circuit protection using fast blow fuse.
- Electronic overload protection.
Panel Control
- VAF / VF 3 Phase Model Start, Select, Stop / Reset
LCD - Specification
- 16*4 lcd display is used for easy reading of parameters.
- True rms sensing and reading of voltage and current.
- 100 event error log facilities for easy diagnosation of fault level.
- Internal variable timer is adopted for on time delay and overload trip of scvs.
- Selectable phase reverse function.
- Selectable auto on function.
- Less analog circuit and hence failure rate is reduced.
- Built in digital meter for monitoring the voltage / current & frequency.
- Separate isolated PCB for triac switching for motor.
Product Specification
| PARAMETERS | 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 | 170-270 Single phase 295-465 volts three phase |
| 195-270 Single phase 340-465 volts three phase | |
| 205-270 single phase 360-465 volts three phase | |
| Special range | As per customer requirements |
| Output voltage | 220/230/240 V AC in single phase |
| 380/400/415 V AC in three phase | |
| System | Unbalanced/balanced type |
| Connection | Star/Delta or Star/Star |
| Output Voltage regulation | (+/-) 1% from no load to full load |
| Servo motor drive model -A | AC Servo Synchronous Motor - Small |
| Correction speed | 35 V/sec-1 ph, 60 V/sec-3 ph |
| Response time | Above 60 milli. sec. |
| Servo motor model-B | DC servo motor |
| Correction speed | Upto 105 V/sec. |
| Response time | 10 milli.sec. |
| Operating frequency | 47 to 53 HZ |
| Output waveform | True reproduction of input |
| Insulation | Class "B" |
| Short circuit percentage and period | 300 % for 250 milli sec. |
| Overload capacity | 120 % for 1 minute |
| Effect of load P.F on OP Volts | Nil |
| Waveform distortion | Nil |
| Duty Cycle | 100 % continuous |
| Ambient | Upto 45c max above ambient Relative humidity upto 90% |
| System construction | As per IS:9815 |
| Enclosure | Powder coated |
| Efficiency | Better than 98% (electrical consumption saved) |
| Environment | Designed for indoor / outdoor tropical use |
| Mounting | On wheels |
| Earthing | Earthing terminals provided |