Three-phase toroidal transformer potted
400VA up to 30kVA

Cast-resin three-phase power-dry-transformers, cast-resin three-phase-isolation-transformers as toroidal core version

Datasheet as PDF

BV 2144001a

Field of application

Isolating transformer conform to IEC/EN61558-2-4 for general purpose, e.g. as safe isolation for devices conform to VDE0700/EN60335, or as distribution transformer to build TN-systems. Useable for potential free net, for test systems or as power-ratio transformers. For machine controls, vehicle construction, automotive techniques, as toroidal-isolating-transforemr to supply medical rooms, as high current-transformer up to 10 kA.

Description

The core of toroidal transformers consists of a thin grain-oriented tape, which is wound in direction of the magnetic flow. The direction corresponds with the direction of rolling and the losses are very low. The air gap just arises at the first and the last winding, hence it is very small. Thus a low magnetic stray field, small weight and small volume are the results.

The three-phase toroidal transformer consists of three separate transformers without chain-linking to the core. The arrangement of the three phases can be selected. Thus and adjustment to difficult geometric relations is possible.

If one phase fails at the input, there will remain at least one phse without phase displacement at the output. In case a phase conductor has an earth fault, the voltages of the otehr two phase conductors remain constant, hence they won’t increase.

Technical data

3AC-isolating transforemr conform to IEC/EN61558-2-4,
VDE 0570-2-4
Fully potted in a housing
On request IP 54 is possible
Temperatureclass B
Max. ambient temperature 40°C
Fire class UL 94 V0
Prepared for protection index I
Cable connectors or block terminals, shock proof conform to VBG4,
or flat termination with bolt, not shock proof
Frequency 50-60 Hz

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