| Description | Single Phase | Three Phase |
|---|---|---|
| Voltage Stabiliser type | Servo Controlled Voltage Stabiliser with 1-phase input and 1-phase output, | Servo Controlled Voltage Stabiliser with 3-phase input and 3-phase output, indoor type, suitable for unbalanced loads and unbalanced input conditions |
| Input Voltage Range | 160 V to 270 V / 190 V to 250 V | Wide : 295 V - 480 V Medium : 340 V to 480 V Short : 360 V to 460 V |
| Output voltage & setting | 230 V +/-1% adjustable to 3% & 5% - Output voltage setting can be changed to 220V / 240V. Input regulation range will shift accordingly. | 415 V +/-1% adjustable to 3% & 5% - Output voltage setting can be changed to 360V / 380V / 400V. Input regulation range will shift accordingly. |
| Servo motor drive | AC synchronous stepper motor | AC synchronous stepper motor |
| Input frequency range | 47 Hz to 53 Hz. | 47 Hz to 53 Hz. |
| Efficiency | Above 97% | Above 97% |
| Type of cooling | Natural Air/Oil cooled | Natural Air/Oil cooled |
| Average correction rate | 25V per sec (Line to Line) | 25V per sec (Line to Line) |
| Sensing & Correction | Microcontroller based True RMS Sensing and correction | Microcontroller based True RMS Sensing and correction |
| Display & Fault Annunciation | Displays I/P & O/P Voltage, O/P Current, Frequency with status | Displays I/P & O/P Voltage, O/P Current, Frequency, PF, kVA, kW & Phase Reversal with status |
| Overload Protection | Above 110% through Current sensing | Above 110% through Current sensing |
| Short-circuit protection | MCB will be provided up to 10 KVA | HRC Fuse at input (MCB/MCCB Optional) |
| Single phasing prevention | - | Through Voltage & Zero Cross over sensing |
| Service Bypass Switch | Provided (Oil-cooled) | Change over switch provided at input |
| Spike & Surge Prevention | By MOV connected across output terminal. RFI filter optional up to 5 KVA | By MOV connected across output terminal |