Do I Need To De-rate an AVR When Installed At High Altitudes?

Yes. A fan cooled Automatic Voltage Regulator (AVR) must be de-rated at altitudes above 2000 meters. At 2000 meters, de-rate by 18%. and then by 9% for every 1000 meters. So At 3000 meters, de-rate by 27% and so on

Is the AVR set to 220 or 230 or 240V nominal?

The Automatic Voltage Regulators (AVRs) are normally set to 220V. It can operate normally and safely with 230V or 240V. In fact, the output will be reduced to 220V +/-4% which will be a better operating voltage for most electrical/electronic equipment and can additional save energy with certain type of equipment.

Home / Voltage Protection / Voltright / Three Phase / Pro Series / AVR3ASxxxx – Standard Range

AVR3ASxxxx – Standard Range

Three Phase Static Automatic Voltage Regulator

The AVR3ASxxx – Standard Range is designed for regions with unstable voltage supply. This range offers a +/-20% input voltage tolerance with 3- 4% output accuracy (depending on model). Designed for regions with moderate voltage fluctuations, offering a robust, tested and reliable solution for stable voltage output. It is an ideal choice for applications requiring durability and cost-effectiveness in environments where voltage variations remain within manageable limits but correction speeds are required.

Features

Fully electronic with no moving parts for:

From 200Amps per phase and up to 3000Amps per phase
Up to 2mVA power
+/-20% Input voltage Range, 4% output accuracy
SCR Technology
Fully Solid State requiring No Maintenance
High reliability
Very Fast Response Time

Suitable For:

Satellite operators
Infrastructure telecom companies
Embassies worldwide for reliable electrification of their posts
Medical systems for digital imaging, scanning and x-ray equipment
Mobile phone operators
Offices and factories
Grid utility companies for voltage regulation to their sub-stations
Wind Farms

Options

Optional Extras (Ordered Separately)

Automatic Voltage Switcher (AVS) with HVD and LVD
Input circuit breaker
Output circuit breaker
Manual bypass transferring the load to the utility grid
Volt free contact alarms: High Temp Alarm • Internal Bypass Status • I/P Circuit Breaker Status • LVD Alarm • General Fault • Over-Temp Alarm • External Bypass Status • O/P Circuit Breaker Status • HVD Alarm
High-level lightning protection (Class I)
Anti-condensation heaters

Description
Special features include:
- Wide input frequency tolerance between 45 to 75 Hz allowing unit to function properly in areas of severe voltage disturbances
- High overload capability with up to 150% for 4 minutes
- Very low losses and minimal heat dissipation due to an efficiency of over 96% at full load
- Internal automatic bypass
- All cables made into LSZH compliant materials (low smoke zero halogen)
- Galvanised steel construction with high anti-corrosion paint finish
- Warranty of 2 years. Sollatek provides full back up support on all its products, with local support in over twenty countries worldwide
- Read more about the advantages of Solid state vs Motorised mechanical servo stabilisers.

Specification

Input
Input voltage	230/400V, +/-20%. (wider input range optional).
Maximum Input Current	3 x 1455 amps (at 100% load and maximum boost).
Frequency range	45Hz to 75Hz (i.e 50Hz –10%, +50%. or 60Hz –25%, +25%).

Output
Output voltage	230/400V, +/-4%.
Maximum Output Current	3 x 1200 amps.
Maximum Output Power	828kVA.

Model Table

AVR Description	Max Input Current/ Phase (A)	Max Output Current/ Phase (A)	Output Power @ 230V (kVA)	Heat Dissipation (kW)	AVR Dimension W x D x H (cm)	AVR Weight (kg)	Output Range
AVR3AS-230kVA 3×303/250A	303	250	230 kVA	3.5	143x74x157	910	4%
AVR3AS-275kVA 3×362/300A	362	299	275 kVA	4.1	143x74x157	940	4%
AVR3AS-370kVA 3×487/400A	487	402	370 kVA	5.6	155x74x177	1250	3%
AVR3AS-460kVA 3×606/500A	606	500	460kVA	6.9	160x74x177	1650	3%
AVR3AS-550kVA 3×725/600A	725	598	550 kVA	8.3	160x74x177	1877	3%
AVR3AS-700kVA 3×922/800A	922	761	700 kVA	10.5	183x79x198	2240	3%
AVR3AS-900kVA 3×1186/1000A	1,186	978	900 kVA	13.5	110x74x177	1040	3%
AVR3AS-1100kVA 3×1449/1200A	1,449	1196	1100	16.5	110x74x177	1120	3%
AVR3AS-1650kVA 3×2174/1800A	2,174	1793	1650	16.5	138x79x200	1680	3%
AVR3AS-2000kVA 3×2635/2173A	2,635	2174	2000	16.5	138x79x200	1740	3%

Downloads
Brochures
- VoltRight AVR Brochure – English 2025 (5MB)
Datasheets
- AVR3ASxxx Range Datasheet (1MB)
- AVR3AS300-O with Aux Datasheet 877 (KB)
- AVR3AS2200-O Datasheet 890 (KB)
- AVR3AS300 – DGM Datasheet 558 (KB)
- AVR3AS500 Datasheet 775 (KB)
Case Studies
- Sollatek Provides Stable Energy Supply to Wind Farms
- Sollatek AVRs Selected For US Embassy In Nigeria To Address Power Challenges
Click on the question to get the full answer.

Do I Need To De-rate an AVR When Installed At High Altitudes?
Yes. A fan cooled Automatic Voltage Regulator (AVR) must be de-rated at altitudes above 2000 meters. At 2000 meters, de-rate by 18%. and then by 9% for every 1000 meters. So At 3000 meters, de-rate by 27% and so on
Is the AVR set to 220 or 230 or 240V nominal?
The Automatic Voltage Regulators (AVRs) are normally set to 220V. It can operate normally and safely with 230V or 240V. In fact, the output will be reduced to 220V +/-4% which will be a better operating voltage for most electrical/electronic equipment and can additional save energy with certain type of equipment.