LV Rectifier Transformers and Transformers for Thyristor Controllers
Country: Poland · Model: LV rectifier transformers
Low-voltage rectifier transformers up to 1 000 V for supplying diode, thyristor and transistor bridges, as well as phase-controlled thyristor controllers. The range works at frequencies from 16.7 to 1 000 Hz. They are used in electrolysis, heating, furnace and drive circuits, where the load is non-linear and the voltage has to be matched to the rectifier.
- Purpose
- supply of rectifiers (diode, thyristor, transistor bridges) and phase-controlled thyristor controllers
- Voltage
- up to 1 000 V (LV range up to 1.1 kV)
- Options
- built-in smoothing reactors or filters, taps, cooling, IP enclosures
- Example circuits
- 6- and 12-pulse rectifiers
Technical specifications
| Purpose | supply of rectifiers (diode, thyristor, transistor bridges) and phase-controlled thyristor controllers |
|---|---|
| Voltage | up to 1 000 V (LV range up to 1.1 kV) |
| Options | built-in smoothing reactors or filters, taps, cooling, IP enclosures |
| Example circuits | 6- and 12-pulse rectifiers |
| Applications | electrolysis, heating, furnaces, drives, traction rectifiers |
Replacement for
TSZP-…/0.4, TSP (dry low-voltage converter type), TSZI
selected by purpose and main parameters, please confirm with the manager
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
The transformer converts the mains alternating voltage to the level needed at the rectifier input, from which direct voltage is then obtained. The windings are designed for a non-linear load, so harmonic suppression and thermal stability are built into the design. In the case of thyristor controllers the voltage and current are distorted by steep edges and a high level of higher harmonics, so the windings and the magnetic system are made with heating and losses in mind. The windings are made of aluminium or copper, with VPI impregnation. To order, smoothing reactors or filters are built in, taps are added, and the cooling and the IP enclosure are changed. For multi-pulse circuits there is a 12-pulse variant with a passive harmonic filter. Parameters are set from a questionnaire, since there are no tabular data.
How to choose
Start with the rectifier circuit and the nature of the load. When harmonics in the mains need to be reduced, look at the 12-pulse version with a built-in filter. Then fix the voltage up to 1 000 V, the frequency within 16.7–1 000 Hz, the winding material, the cooling and the IP of the enclosure. For two-phase consumers ET3S2 with the Scott connection is more suitable, and for circuit isolation in medical rooms ET1MED or ET3MED.
Request a price and lead time
LV Rectifier Transformers and Transformers for Thyristor Controllers. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
Which rectifiers are these transformers suitable for?
For diode, thyristor and transistor bridges, with typical 6- and 12-pulse circuits. They are also used for phase-controlled thyristor controllers.
What voltage and frequency are they made for?
Voltage up to 1 000 V, and the whole LV range goes up to 1.1 kV. Frequency from 16.7 to 1 000 Hz, with aluminium or copper windings.
How does a transformer for a thyristor controller differ from an ordinary one?
It is designed for the strongly distorted voltage and current of phase control. The windings are specially calculated, the thermal resistance is higher, and the magnetic system heats less.
Can a transformer with a smoothing reactor or filter be ordered?
Yes, smoothing reactors or filters are built in to order. For 12-pulse circuits there is a variant with a passive harmonic filter.
Where are they used?
In electrolysis, heating, furnaces, drives and traction rectifiers. The catalogue mentions heating of metallurgical furnaces and supply of high-power vacuum furnaces.
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Need a price, lead time or replacement?
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