Three-phase servo-driven voltage stabilizer SRV33, 6–60 kVA, independent phase regulation
Country: Spain · Model: SRV33
The three-phase servo-driven stabilizer SRV33 for 6–60 kVA regulates each phase separately, accepts 285–440 V at the input and holds 400 V at the output. It is installed in private houses and boiler rooms with a three-phase supply, on farms, in workshops, small plants, pumping stations and refrigeration units, where the mains sag in the evening or in season.
- Frequency
- 47–65 Hz
- Correction speed
- 90 V/s
- Overload
- 200 % for 10 s
- Load power factor
- 0.8 (1 on request)
Technical specifications
| Frequency | 47–65 Hz |
|---|---|
| Correction speed | 90 V/s |
| Overload | 200 % for 10 s |
| Load power factor | 0.8 (1 on request) |
| Efficiency | > 96 % |
| Harmonic distortion | none introduced |
| Bypass | manual |
| Ingress protection | IP20 (IP21, IP54 on request) |
| Operating temperature | up to 50 °C |
| Storage | −10…+60 °C |
| Humidity | 90 % non-condensing |
| Altitude | up to 2000 m |
| Noise | < 50 dB |
| Certification | CE; ISO 9001 (TÜV Austria Hellas) |
| Warranty | 2 years, spare parts for 10 years |
| Series | SRV33 |
| Phases | 3 phases / 3 phases, independent regulation per phase |
| Ratings | 6; 10.5; 15; 22.5; 30; 45; 60 kVA |
| Input voltage | 285–440 V |
| Output voltage | 400 V (380–415 V on request); version for 220–440 V |
| Regulation | servo drive controlled by a microprocessor |
| Protection | min./max. voltage, max. current; input circuit breaker |
| Display | digital: voltages, current, frequency, power |
Ukrainian replacement/analogue
- Three-phase stepped thyristor voltage stabilizers Volter 10.5–81 kW (S, PT, PTS, PTSh, PTSSh)
- Three-phase stepped voltage stabilizers Volter 100 / 150 / 200 (105–210 kW)
- Three-phase stepped thyristor voltage stabilizers Hertz V3.0, 16.5–53 kW (3×25 … 3×80 A)
- Three-phase stepped thyristor voltage stabilizers Hertz-PRO V3.0, 66–106 kW (3×100 … 3×160 A)
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
Each phase is regulated independently, so phase imbalance caused by single-phase consumers does not interfere with stabilization. The output can be set to 380 or 415 V on request, and a version for mains voltages from 220 to 440 V is also available. Regulation is done by a powerful autotransformer along which a servo drive moves the sliding contact, and the drive is controlled by a microprocessor. Correction runs at 90 V/s, which is slower than in static models, but there is no harmonic distortion and the unit tolerates heavy starting conditions without trouble. A double overload is withstood for 10 s, and efficiency is above 96 %. The protection switches off the load when the voltage goes out of limits or the current is exceeded, and a circuit breaker is fitted at the input. The digital display shows voltages, current, frequency and power, and the manual bypass makes it possible to service the stabilizer without switching off the consumers. The enclosure is IP20, or IP21 or IP54 on request for unheated rooms. Cooling is natural with a thermostat, operating temperature is up to 50 °C, altitude up to 2000 m, noise below 50 dB.
How to choose
Take the rating with a 20–30 % margin over the full load power. For a house with a boiler, pumps and air conditioners 10.5–22.5 kVA is usually enough, and for workshops and small plants 30–60 kVA. The range of sizes is 6 / 10.5 / 15 / 22.5 / 30 / 45 / 60 kVA. Ratings of 100–150 kVA in this series are made in an industrial version. If fast response to dips is needed rather than smooth correction, look at the three-phase static stabilizer for 30–60 kVA with a speed of 1000 V/s.
Request a price and lead time
Three-phase servo-driven voltage stabilizer SRV33, 6–60 kVA, independent phase regulation. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How does the servo-driven SRV33 differ from a static stabilizer?
In speed and voltage waveform. Correction is 90 V/s against 1000 V/s for the static one, but there is no harmonic distortion and each phase is regulated separately.
What input range is permitted for the SRV33?
285–440 V at a frequency of 47–65 Hz, with 400 V at the output. A version for mains voltages from 220 to 440 V is available.
What does the stabilizer do if the voltage goes outside the permitted limits?
The protection switches off the load when the voltage is below the minimum or above the maximum, and also when the current is exceeded. A circuit breaker is installed at the input.
Does the SRV33 work with phase imbalance?
Yes. The phases are regulated independently, so uneven loading by single-phase consumers does not interfere with the stabilization of each phase.
What warranty and certification does the SRV33 have?
The warranty is 2 years, and spare parts are supplied for 10 years. It has CE marking, and the quality system is certified to ISO 9001 by TÜV Austria Hellas.
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REQUEST
Need a price, lead time or replacement?
Send us a request and we will confirm the configuration, lead time and delivery terms. We reply by email.