Transformers

A transformer is a static device with two or more coils which transforms a system of alternating voltage and alternating current through electromagnetic induction, usually with different values but the same frequency, for the purpose of transmitting electrical energy (Ref: VDE 0570, IEV 421-01-01).

Requirements

The design-related differences between transformers are generally determined by their intended utilisation. Respective requirements are established in the installation and device standards  (e.g. VDE 0100, VDE 0113/EN 60204/ IEC 60204, VDE 0700/EN 60335/ IEC 60335, VDE 0805/EN 60950/ IEC 60950) and in the transformer standards (e.g. VDE 0570/EN 61558/ IEC 61558).

An important selection criterion is the insulation construction between input and output electrical circuits:

Transformers with double or enhanced insulation

• Safety transformers (for the safety measure of safety extra-low voltage)
• Isolating transformers (for the safety measure of protective separation)

Transformes with basic insulation

• Control transformers (for the safety measure of protective earthing)
• Mains transformers with separated coils, general

Transformers without insulation (no metallic isolation) between input and output circuits

• Auto transformers

Standards

Unless otherwise agreed upon with the ordering party, we manufacture in accordance with the latest “State of Technology” and with the following standards:

VDE 0570: Safety of transformers, power units and similar  EN 61558, IEC 61558: Safety of power transformers, power supply units and similar.