Norm

IEC 61558-1:2017 en

Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests

290,82 351,89 Incl BTW

Over deze norm

Status Definitief
Aantal pagina's 356
Gepubliceerd op 01-09-2017
Taal Engels
IEC 61558-1 deals with safety aspects of transformers, reactors, power supply units and combinations thereof such as electrical, thermal and mechanical safety. This document covers the following independent or associated stationary or portable types of dry-type transformers, power supply units, including switch mode power supply units, reactors and combinations thereof in the field of safety. The windings can be encapsulated or non-encapsulated. They are not forming a part of the distribution network.  a) Stationary or portable, single-phase or poly-phase, air-cooled (natural or forced), isolating and safety isolating transformers, independent or associated with the following characteristics: - rated supply voltage not exceeding 1 000 V AC; - rated supply frequency not exceeding 500 Hz; and complying with the following values, unless otherwise specified in the relevant part of IEC 61558-2:  - for isolating transformers: - rated output for single phase transformers, not exceeding 25 kVA, and for polyphase transformers not exceeding 40 kVA; - no-load output voltage and the rated output voltage exceeding 50 V AC, and not exceeding 500 V a.c, or 1000 V AC to be in accordance with the national wiring rules or for a special application.  - for safety isolating transformers: - rated output for single phase transformers not exceeding 10 kVA, and for polyphase transformers not exceeding 16 kVA; - no-load output voltage and the rated output voltage not exceeding 50 V AC between conductors, or between any conductor and protective earthing. b) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced) separating transformers, auto-transformers, variable transformers and small reactors, independent or associated with the following characteristics: - rated supply voltage not exceeding 1 000 V AC; - rated supply frequency not exceeding 500 Hz; and complying with the following values, unless otherwise specified in the relevant part of IEC 61558-2: - no-load output voltage or a rated output voltage for both independent and associated transformers not exceeding 15 kV AC, and for independent transformers, a rated output voltage not less than 50 V AC; - rated output not exceeding the following values:  - 1 kVA for single-phase transformers;  - 2 kVAR for single-phase reactors;  - 5 kVA for polyphase transformers;  - 10 kVAR for polyphase reactors. c) Stationary or portable, single-phase or polyphase, air-cooled (natural or forced), independent or associated power supply units and switch mode power supply units incorporating one or more transformer(s) of type a) or b) with the following characteristics: - rated supply voltage not exceeding 1 000 V AC; - rated supply frequency not exceeding 500 Hz; - internal operational frequency for power supply units not exceeding 500 Hz and for switch mode power supply units not exceeding 100 MHz; and with the following values, unless otherwise specified in the relevant part of IEC 61558- 2:  - for power supply units and switch mode power supply units incorporating isolating transformers: - rated output for single- phase or polyphase power supply units or switch mode power supply units not exceeding 1 kVA; - no-load output voltage and the rated output voltage exceeding 50 V AC or 120 V ripple-free DC, and not exceeding 500 V AC or 708 V ripple-free DC, or 1000 V AC or 1 415 V ripple- free DC to be in accordance with national wiring rules or for a special application; - for power supply units and switch mode power supply units incorporating safety isolating transformers: - rated output for single- phase or polyphase power supply units and switch mode power supply units not exceeding 1 kVA; - no-load output voltage and rated output voltage not exceeding 50 V AC or 120 V ripple-free DC between conductors, or between any conductor and protective earthing.

Details

ICS-code 29.180
Engelse titel Safety of transformers, reactors, power supply units and combinations thereof - Part 1: General requirements and tests
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