Source: https://standards.globalspec.com/std/13113021/snz-as-nzs-61558-1
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SNZ AS/NZS 61558.1 - Safety of transformers, reactors, power supply units and combinations thereof – Part 1: General requirements and tests | Engineering360
Safety of transformers, reactors, power supply units and combinations thereof – Part 1: General requirements and tests
This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee EL-002 - Safety of Household and Similar Electrical Appliances and Small Power Transformers to supersede AS/NZS 61558.1:2008 and its amendments. During this period AS/NZS 61558.1:2008 will also remain current. Regulatory authorities that reference this Standard in regulation may apply these requirements at a different time. Users of this Standard should consult with these authorities to confirm their requirements.
The text of IEC 61558-1 Ed 3, prepared by IEC Technical Committee TC 96, was submitted to the Standards Australia/Standards New Zealand Combined Procedure (dual public comment and committee vote) for adoption of the IEC standard as a Standards Australia/Standards New Zealand joint standard.
a) fully insulated winding wires (FIW), new tables and aging tests for FIW constructions,
b) overvoltage categories 1, 2, 3 and 4 for clearances and dielectric strength tests (new tables) are included,
c) development of new symbols for the different overvoltage categories,
d) symbol for maximum altitudes, if higher than 2 000 m,
e) symbol for plug in power supply units, if the pins are damaged (tumbling barrel test),
f) symbol for minimum temperature (even during the transportation),
g) alternative temperature measurement, simulated load and back to back method according to IEC 60076-11,
h) short circuit and overload protection, simulated load and back to back method according to IEC 60076-11,
i) adjustment of temperatures in Table 2 according to IEC Guide 117,
j) establishing partial discharge test above 750 V for FIW constructions,
k) requirements for toroidal core constructions, division for basic and for supplementary isolation,
l) modification of protection indexes for enclosures (IP-code),
m) dimensioning of rectangular cross section connectors for transformers,
n) repetition test, 80 % of required dielectric strength test voltage of Table 14,
o) vibration test for vehicles and railway applications,
p) two Y1 Capacitors for working voltages above 250 V and not exceeding 500 V with overvoltage category 3.
This Standard is an adoption with national modifications of the third edition of IEC 61558-1 Safety of transformers, reactors, power supply units and combinations thereof - Part 1 General requirements and tests. It has been varied as indicated to take account of Australian and New Zealand conditions.
This Standard, referred to as Part 1, is to be used in conjunction with the appropriate Part 2, which contains clauses that supplement or modify the corresponding clauses in Part 1, to provide the relevant requirements for each type of product.
This third edition of Part 1 is only to be used in conjunction with parts 2 based on this edition. Titles of existing standards in this series will be updated at the time of their next edition.
This standard may be applied, as far as is reasonable to transformers, reactors, power supply units and combinations not mentioned in the parts 2, and to transformers, reactors, power supply units and combinations designed on new principles. In this document, the following print types are used:
- proper requirements: in roman type;
- explanatory matters: in smaller roman type.
In the text of the document, the words in bold are defined in Clause 3.
NOTE 1 Subclauses, notes and annexes that are additional to those in the IEC standard are prefixed with the letters AZ.
NOTE 2 In this document, p is used in the margin to indicate instructions for preparing a consolidated version.
The essential safety requirements in AS/NZS 38201 that could be applicable to transformers, reactors, power supply units and combinations thereof are covered by this standard taken in conjunction with any other relevant requirements affecting safety requirements for transformers, reactors, power supply units and combinations thereof are covered by this standard.
The national variations to IEC 61558-1 Ed 3 form the Australian and New Zealand national variations for purposes of the IECEE scheme for recognition of results of testing to standards for safety of electrical equipment (the CB scheme).
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