IEC 61558-2-23:2000
Safety of power transformers, power supply units and similar devices - Part 2-23: Particular requirements for transformers for construction sites

Standard No.

IEC 61558-2-23:2000

Release Date

2000

Published By

International Electrotechnical Commission (IEC)

Status

Be replaced 2010-09

Replace By

IEC 61558-2-23:2010

Latest

IEC 61558-2-23:2010

Scope

Replacement: This International Standard deals with all aspects of safety such as electrical, thermal and mechanical. This part of IEC 61558 applies to stationary or portable single-phase or poly-phase air-cooled (natural or forced) independent or associated, isolating or safety isolating transformers intended for use on construction sites, having a rated supply voltage not exceeding 1 000 V a.c., and a rated frequency not exceeding 500 Hz. The rated output should not exceed: - 25 kVA for single-phase transformers; - 40 kVA for poly-phase transformers. Isolating transformers for construction sites should have a no-load output voltage and a rated output voltage exceeding 50 V a.c. and not exceeding 250 V a.c. Safety isolating transformers for construction sites should have a no-load output voltage and a rated output voltage not exceeding 50 V a.c. NOTE This standard is applicable to transformers for the supply of electricity in locations as specified in IEC 60364-7-704. The latter also specifies the protection by using an earthed midpoint or starpoint of the output winding. Transformers for construction sites are to be used when required by the installation rules or by the appliance specification for protection purposes. When the transformers are incorporated into low-voltage switchgear and controlgear assemblies for construction sites as specified in IEC 60439-4, the additional requirements of IEC 60439-4 will apply to the assembly. This standard is applicable to dry-type transformers. The windings may be encapsulated or non-encapsulated. NOTE 1 For transformers filled with liquid dielectric or pulverized material, such as sand, additional requirements are under consideration. NOTE 2 Attention is drawn to the fact that - for transformers intended to be used in tropical countries, special requirements may be necessary; - in locations where special environmental conditions prevail, particular requirements may be necessary. This standard also applies to transformers incorporating electronic circuits. This standard does not apply to external circuits and their components intended to be connected to the input and output terminals or socket-outlets of the transformer.

IEC 61558-2-23:2000 history

• 2010 IEC 61558-2-23:2010 Safety of transformers, reactors, power supply units and combinations thereof - Part 2-23: Particular requirements and tests for transformers and power supply units for construction sites
• 2000 IEC 61558-2-23:2000 Safety of power transformers, power supply units and similar devices - Part 2-23: Particular requirements for transformers for construction sites