Standard:
DIN EN 61558-2-14 VDE 0570-2-14:2013-09Safety of transformers, reactors, power supply units and combination thereof Part 2-14: Particular requirements and tests for variable transformers and power supply units incorporating variable transformers |
Standard
withdrawn: DIN VDE 0552 VDE 0552:1969-05Specification for variable-ratio transformers having current collectors which are moved transversely to the direction of the windings
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