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CSA E61558-2-1-03-CAN/CSA Document Information:
Title
Safety of power transformers, power supply units and similar – Part 2: Particular requirements for separating transformers for general use
Canadian Standards Association
Publication Date:
Feb 1, 2003
Scope:
Replacement:
This part 2 of IEC 61558 applies to stationary or portable,
single-phase or polyphase, air-cooled
separating transformers, associated or not, having a rated supply
voltage not exceeding 1000 V
a.c., a rated frequency not exceeding 500 Hz, and a rated output not
exceeding:
- 1 kVA for single-phase transformers;
- 5 kVA for polyphase transformers.
This standard is also applicable to separating transformers having a
rating up to 40 kVA, however
such transformers are considered as special transformers and are
subjected to an agreement between
the purchaser and the supplier.
The no-load output voltage or the rated output voltage shall not
exceed 1000 V a.c. or 1415 V
ripple-free d.c.
This standard applies to transformers where double or reinforced
insulation between circuits is not
required by the installation rules or by the appliance specification.
NOTE 1 - Normally, the transformers are intended to be associated with
equipment to provide
voltages different from the supply voltage for the functional
requirement of the equipment. The
safety insulation may be provided (or completed) by other features of
the equipment, such as the
body. Parts of output circuits may be connected to the input circuit
or to protective earth.
This standard is also applicable to transformers associated with
specific items of equipment, to
the extent decided upon by the relevant IEC technical committees.
This standard is applicable to dry type transformers. The windings may
be encapsulated or
non-encapsulated.
NOTES
2 For transformers filled with liquid dielectric or pulverised
material, such as sand, additional
requirements are under consideration.
3 In locations where special environmental conditions prevail,
particular requirements may be
necessary in accordance with IEC 364-5-51.
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