three-phase dry-type transformers 1–800 kVA
Country: France · Model: LV dry-type 3-phase transformer
Three-phase dry-type low-voltage isolation transformers of 1–800 kVA work at frequencies of 50–400 Hz. They are used for galvanic isolation of loads, for changing the earthing system and for powering equipment with increased frequency.
- Power
- 1–800 kVA
- Frequency
- 50–400 Hz
- Windings
- separate, electrostatic screen
- Thermal class
- B, F or H
Technical specifications
| Power | 1–800 kVA |
|---|---|
| Frequency | 50–400 Hz |
| Windings | separate, electrostatic screen |
| Thermal class | B, F or H |
| Design | open or in an IP23/IP55 enclosure |
| Standards | IEC 60726, IEC/EN 61558, NF C 52-100, NF C 52-200 |
Replacement for
TSZI, TSZ 0.38/0.23 kV (dry low-voltage), OSM1-0.063…4 kVA (single-phase), OSO
selected by purpose and main parameters, please confirm with the manager
Replacement pages: ОСМ1-0,063, ОСМ1
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The primary and secondary windings are separate, with an electrostatic screen between them that diverts common-mode noise from the mains. The insulation has thermal class B, F or H, which determines the permissible temperature rise and overload capacity. The transformer is supplied open for installation in a cabinet, or in an IP23 enclosure for electrical rooms or IP55 for dusty and damp rooms. Protective devices and a tropical version for hot humid climates are available as options. The design complies with IEC 60726, IEC/EN 61558 and the French standards NF C 52-100 and NF C 52-200.
How to choose
First fix the power, the winding voltages and the frequency, then the insulation class for the room temperature and the enclosure protection rating. For building into a UPS cabinet or a switchboard the open version is enough; for separate installation in a room take an enclosure. If voltage stabilization is also needed alongside isolation, the transformer is complemented by a REG series stabilizer.
Request a price and lead time
three-phase dry-type transformers 1–800 kVA. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Why does an isolation transformer have an electrostatic screen?
The screen between the separate windings diverts capacitive noise to ground, so it does not pass from the mains to the sensitive load.
What frequency are the dry-type transformers designed for?
The transformers are made for frequencies of 50–400 Hz, so they also suit 400 Hz networks.
Which insulation classes are available for LV transformers?
Thermal classes B, F or H; the choice depends on the ambient temperature and the load duty.
What power do the three-phase LV transformers have?
The range covers 1–800 kVA, in the open version or in an IP23 or IP55 enclosure.
To which standards are the transformers built?
They comply with IEC 60726, IEC/EN 61558, NF C 52-100 and NF C 52-200.
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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.