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GB 19212.5-2011 English PDF (GB19212.5-2011)

GB 19212.5-2011 English PDF (GB19212.5-2011)

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GB 19212.5-2011: [GB/T 19212.5-2011] Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1100V -- Part 5: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transforme

GB 19212.5-2011
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 29.180
K 41
GB 19212.5-2011 / IEC 61558-2-4:2009
Replacing GB 19212.5-2006
Safety of transformers, reactors, power supply units and
similar products for supply voltages up to 1 100V - Part 5:
Particular requirements and tests for isolating transformer
sand power supply units incorporating isolating
transformers
(IEC 61558-2-4:2009, IDT)
ISSUED ON: JUNE 16, 2011
IMPLEMENTED ON: MAY 01, 2012
Issued by: General Administration of Quality Supervision, Inspection and Quarantine;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword ... 4
1 Scope ... 7
2 Normative references ... 8
3 Terms and definitions... 9
4 General requirements ... 9
5 General notes on tests ... 9
6 Ratings ... 9
7 Classification ... 10
8 Marking and other information ... 10
9 Protection against electric shock ... 10
10 Change of input voltage setting ... 10
11 Output voltage and output current under load ... 10
12 No-load output voltage ... 11
13 Short-circuit voltage ... 12
14 Heating ... 12
15 Short-circuit and overload protection ... 12
16 Mechanical strength ... 12
17 Protection against harmful ingress of dust, solid objects and moisture ... 12 18 Insulation resistance, dielectric strength and leakage current ... 12 19 Construction ... 12
20 Components ... 15
21 Internal wiring ... 15
22 Supply connection and other external flexible cable or cords ... 16 23 Terminals for external conductors ... 16
24 Provisions for protective earthing ... 16
25 Screws and connections ... 16
26 Creepage distances, clearances and distances through insulation ... 16 27 Resistance to heat, fire and tracking ... 16
28 Resistance to rusting ... 16
Annexes ... 17
Annex C Creepage distances (cr), clearances (cl) and distances through insulation (dti) Material group II (400 ≤CTI < 600) ... 17
Annex D Creepage distances (cr), clearances (cl) and distances through insulation (dti) Material group I (CTI ≥600) ... 17
Annex R Explanations of the application of 4.1.1.2.1 of GB/T 16935.1-1997 (see GB 19212.1-2008 Subclause 26.2) ... 17
Bibliography... 18
Foreword
All technical contents of this Part of GB 19212 are mandatory.
GB 19212 “Safety of power transformers, power supplies, reactors and similar products”1 is divided into the following parts:
Part 1: General requirements and tests;
Part 2: Particular requirements and tests for separating transformers and power supplies incorporating separating transformers for general applications;
Part 3: Particular requirements and tests for control transformers and power supplies incorporating control transformers;
Part 4: Particular requirements and tests for gas and oil burners, ignition transformers; Part 5: Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers;
Part 6: Particular requirements for shaver transformers and shaver supply units; Part 7: Particular requirements and test for safety isolating transformers and power supply units incorporating safety isolating transformers;
Part 8: Particular requirements and tests for transformers and power supplies for toys; Part 9: Particular requirements for bell and chime transformers;
Part 10: Particular requirements and tests for transformers and power supply units for class III handlamps for tungsten filament lamps;
Part 13: Particular requirements for constant voltage transformers;
Part 14: Particular requirements and tests for auto transformers and power supply units incorporating auto transformers;
Part 15: Particular requirements and tests for voltage regulators and power supply units with internal voltage regulators;
Part 16: Particular requirements and tests for isolating transformers for the supply of medical locations;
1 In this series of standards, some parts are under the title of “Safety of power transformers, power supplies, reactors and similar products”, and some parts are under “Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100V”. The titles of future publications of this series of standards may also be revised.
Part 17: Particular requirements and tests for switch mode power supply units and transformers for switch mode power supply units;
Part 18: Particular requirements for switch mode power supplies;
Part 20: Particular requirements for perturbation attenuation transformers; Part 21: Particular requirements and tests for small reactors;
Part 24: Particular requirements for transformers for construction sites; Other parts are under consideration.
This Part is Part 5 of GB 19212.
This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This part is formulated on the basis of GB 19212.1-2008; this part shall be used together with GB 19212.1-2008 and its amendments.
This part is to supplement and modify the corresponding clauses and articles of GB 19212.1-2008, so as to convert the contents of GB 19212.1-2008 into the contents of this part. The newly added contents of GB 19212.1-2008 are numbered from 101 in this part.
This Part uses the translation method to equivalently adopt IEC 61558-2-4:2009 “SAFETY OF TRANSFORMERS, REACTORS, POWER SUPPLY UNITS AND
SIMILAR PRODUCTS FOR SUPPLY VOLTAGES UP TO 1 100 V – Part 2-4:
Particular requirements and tests for isolating transformers and power supply units incorporating isolating transformers” (English version).
Please note that some of the contents of this document may involve patents. The issuing organization of this document is not responsible for identifying these patents. This part also makes the following editorial changes to IEC 61558-2-4:2009: a) Change “this international standard” to “this part”;
b) Use the decimal point “.” to replace the comma “,” as a decimal point; c) Delete the foreword of IEC 61558-2-4:2009.
Compared with GB 19212.5-2006, the main technical changes of this part are as follows: a) Change the standard name to “Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100V - Part 5: Particular requirements and tests for isolating transformer sand power supply units incorporating isolating transformers”;
Safety of transformers, reactors, power supply units and
similar products for supply voltages up to 1 100V - Part 5:
Particular requirements and tests for isolating transformer
sand power supply units incorporating isolating
transformers
1 Scope
This clause of GB 19212.1-2008 is replaced by the following:
This part deals with the safety of isolating transformers for general applications and power supply units incorporating isolating transformers for general applications. Transformers incorporating electronic circuits are also covered by this standard. NOTE 1: Safety includes electrical, thermal and mechanical aspects.
Unless otherwise specified, from here onward, the term transformer covers isolating transformers for general applications and power supply units incorporating isolating transformers for general applications.
NOTE 2: For power supply units (linear), this part is applicable. For switch mode power supply units, IEC 61558-2-16 is applicable together with this part. This part is applicable to stationary or portable, single-phase or polyphase, air-cooled (natural or forced) independent or associated dry-type transformers. The windings may be encapsulated or non-encapsulated.
The rated supply voltage does not exceed 1 100 V a.c., and the rated supply frequency and the internal operating frequencies do not exceed 500 Hz.
The rated output does not exceed:
-- 25 kVA for single-phase transformers;
-- 40 kVA for polyphase transformers.
This part is applicable to transformers without limitation of the rated output subject to an agreement between the purchaser and the manufacturer.
NOTE 3: Transformers intended to supply distribution networks are not included in the scope.

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