Ministab / Sterostab Y — three-phase voltage stabilizers with per-phase regulation, 3–8000 kVA
Country: Italy · Model: Ministab Y / Sterostab Y
The Ministab Y / Sterostab Y three-phase electrodynamic voltage stabilizer covers 3–8000 kVA and regulates each phase separately. Ministab Y spans 3–120 kVA and Sterostab Y spans 45–8000 kVA. It is used in industry, data centres, substations and transport.
- Power
- Ministab Y 3–120 kVA; Sterostab Y 45–8000 kVA
- Voltage
- 380/400/415 V, 50/60 Hz
- Regulation
- independent for each phase
- Load imbalance
- up to 100 %
Technical specifications
| Power | Ministab Y 3–120 kVA; Sterostab Y 45–8000 kVA |
|---|---|
| Voltage | 380/400/415 V, 50/60 Hz |
| Regulation | independent for each phase |
| Load imbalance | up to 100 % |
| Accuracy | ±1 % RMS |
| Efficiency | > 98.5 % |
| Cooling | natural, IP21 (IP54 option) |
Ukrainian replacement/analogue
- Three-phase stepped thyristor voltage stabilizers Volter 10.5–81 kW (S, PT, PTS, PTSh, PTSSh)
- 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 of the three phases has its own regulation channel, so the output voltage is corrected independently of what happens on the neighbouring phases. This matters where the load is spread unevenly, and the stabilizer accepts load imbalance of up to 100 %. Voltage accuracy is ±1 % RMS and efficiency exceeds 98.5 %, so the heat released in the unit itself stays low. The rated voltages 380/400/415 V and the frequency 50/60 Hz cover different grid standards. Cooling is natural and the enclosure is IP21, with an IP54 option for a higher degree of protection. Ministab Y handles the lower powers, while large systems are built on Sterostab Y.
How to choose
The deciding factor is the nature of the load. If the phases are loaded unevenly, the Y version with imbalance tolerance up to 100 % is the right one. For a symmetrical load, Ministab / Sterostab T at 3.5–800 kVA with common regulation fits, and its imbalance limit is 50 %. A single-phase 220/230/240 V network is covered by the Ministab / Sterostab M series at 1–350 kVA. By power, Ministab Y is chosen up to 120 kVA and Sterostab Y from 45 kVA upwards, so both series can be considered in the 45–120 kVA range.
Request a price and lead time
Ministab / Sterostab Y — three-phase voltage stabilizers with per-phase regulation, 3–8000 kVA. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
What power ratings do Ministab Y and Sterostab Y have?
Ministab Y covers 3–120 kVA and Sterostab Y covers 45–8000 kVA. Both series are available in the 45–120 kVA range.
How does a per-phase stabilizer differ from the T model?
In the Y model each phase is regulated independently and load imbalance of up to 100 % is allowed. In the T series regulation is common to all three phases and imbalance is limited to 50 %.
What are the stabilization accuracy and efficiency?
Accuracy is ±1 % RMS and efficiency exceeds 98.5 %.
What supply voltage and frequency does it work with?
The rated voltage is 380/400/415 V and the frequency is 50/60 Hz.
What is the enclosure protection class and how is it cooled?
Cooling is natural and the enclosure is IP21. An IP54 option is also available.
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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.