Automatic voltage regulators (AVRs) are a proven technology originally developed to ensure steady regulated voltage regardless of the input voltage. AVRs are commonly deployed, where voltage is highly variable and where customers are subject to periodic brownout conditions. They are also used in urban areas where voltage often drifts upward past a point that shortens the lifespan of expensive equipments, UPS systems and batteries.
SurajStaar AVR System uses a combination of variable Auto-transformer, Fixed Auto-Transformer and flawless mechanism, all controlled by microprocessor. This design has been improved continually and perfected over a period of over 20 years.
Advantages
Customized as per the site conditions and need of the user
Can be designed for extreme low voltage or extreme high voltage conditions
Protects sophisticated expensive equipments from fluctuations (sags) upto 35V per second per phase.
Does not have any control over spikes and surges
TECHNICAL SPECIFICATIONS
| Equipment Type | Servo Voltage Stabilizer - AVR system |
|---|---|
| Usage All 3 phases and single phase loads | Industrial - (Factories, Hospitals, Movie Theatres, Hotels, etc) & Residential |
| Rating (KVA) | 6 to 3000 KVA |
| Model | Single / Three phase |
| Type of load | Balanced / Unbalanced |
| Input Voltage | Balanced / Unbalanced |
| Type of cooling | Air / Oil |
| I/p voltage (widest possible range) | 155V to 480V (on each phase 90V to 280V) |
| Output (each phase) | 230V +/- 1% |
| Output (three phase) | 410V +/- 1% |
| Input frequency range | 47Hz to 53Hz |
| Panel indications | Input OK, Output OK, Input / Output Voltage, High / Low indicators (can be customized) |
| Under / Over Voltage Protection | Cut off through electronic circuit set at +5% / -10% of output voltage |
| Restart delay | Optional through Electronic circuit |
| Restart mode | Auto with 3 sec delay (upto 3 min optional) |
| Overload cutoff protection | Optional through Electronic circuit / MCCB |
| Short circuit protection | Optional through MCB / MCCB |
| Single phasing prevention | Optional (if chosen) |
| Changeover (to Bypass equipment) | Optional |