GB/T 19212.7-2012[GB/T 19212.7-2012] Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1 100 V -- Part 7: Particular requirements and test for safety isolating transformers and power supply units incorporating safety isola (English PDF)

Foreword

All technical content in this Part of GB 19212 is mandatory.

GB 19212 "of power transformers, power supplies, reactors and similar products -" 1) now includes the following sections.

1) This series of standards, some parts are under "power transformers, power supplies, reactors and similar products," the title, some parts in the "Supply Voltage

For the next 1100V and below transformers, reactors, power supply units and similar products, "the title, the title of this series of standards possible future release

It will be modified.

--- Part 1. General requirements and tests;

--- Part 2. Particular requirements and general purpose test transformer isolated and built separate transformer power supply;

--- Part 3. Specific requirements and test control and built-in control transformer transformer power supply;

--- Part 4. Gas and oil burner ignition transformers for special requirements;

--- Part 5. Particular requirements and tests and built-in isolation transformer isolation transformer power supply device;

--- Part 6. Particular requirements for shaver transformers and shaver supply units;

--- Part 7. Particular requirements and tests for safety isolating transformers and built-in safety isolating transformer power supply device;

--- Part 8. Particular requirements for transformers for toys and power supplies and test;

--- Part 9. Particular requirements for bell and bell transformers;

--- Part 10. Particular requirements for class III portable transformers for filament lamps;

--- Part 13. Particular requirements for constant voltage transformers;

--- Part 14. Particular requirements for auto and test transformers and autotransformers built power supply device;

--- Part 15. Particular requirements for the regulator;

--- Part 16. supply of medical locations Particular requirements for isolating transformers;

--- Part 17. switched-mode power supply units and switch-mode power supply unit with the special requirements for transformers and tests;

--- Part 20. Particular requirements for interference attenuation transformers;

--- Part 21. Small reactors Particular requirements;

--- Part 24. Particular requirements for transformers for construction sites.

Other parts are under consideration.

This is Part 7 GB 19212's. This is part of the GB 19212.1-2008 developed on the basis of this part of the need and

GB 19212.1-2008 and No. 1 in conjunction with amendments.

This part is the GB 19212.1-2008 corresponding chapter, article supplement and modified so GB of content 19212.1-2008

Conversion-oriented part of the contents. The newly added section for GB 19212.1-2008 content numbered starting from 101.

This section drafted in accordance with GB/T 1.1-2009 given rules.

19212.7-2006 "Safety - Part 7 of power transformers, power supply units and similar products of this section instead of GB . General Purpose Security

Particular requirements for full isolation transformer ", compared with GB 19212.7-2006, the main technical changes are as follows.

a) the standard name to "supply voltage of 1100V and below transformers, safe reactors, power supply units and similar products

Part 7. safety isolating transformers and safety isolating transformers built power supply unit Particular requirements and tests ";

b) Chapter 1 increase in the content of the relevant safety isolating transformers built power-related;

c) The standard supply voltage up to 1100V;

d) modify the contents of 19.1, complementing the output circuit of claim;

e) an increase of R changes to Appendix.

This section uses the translation method identical with IEC 61558-2-6.2009 "supply voltage is 1100V and below transformers, reactors,

Safe power supply units and similar products - Part 2-6. safety isolating transformers and safety isolating transformer built a special power supply unit

Requirements and testing "(in English).

For ease of use, this part of the IEC 61558-2-6.2009 also made the following editorial changes.

a) "this International Standard" by "this section";

b) Remove IEC 61558-2-6.2009 Foreword.

Please note that some of the content of this document may involve patents. Release mechanism of the present document does not assume responsibility for the identification of these patents.

This part is proposed by the China Electrical Equipment Industrial Association.

This part of the National Small power transformers, reactors, power supply units and similar products Standardization Technical Committee (SAC/TC418)

Centralized.

This section is drafted. Shenyang Transformer Research Institute, China Electronics Standardization Institute, National Radio and Television Product Quality Supervision and Inspection

Test center (Beijing Terrett Detection Technology Services Co., Ltd.), the Ministry of Industry Institute of Electronics fifth quality inspection center, Shanghai quality supervision

Governor Electronics Technology Research Institute testing, inspection and quality household appliances.

1 Scope

GB 19212.1-2008 this chapter is replaced by the following.

GB 19212 of the provisions of this part of the general-purpose power supply device for safety isolating transformers and general purpose built safety isolating transformer

Safety requirements. Transformers incorporating electronic circuits are also included in this section.

Note 1. Includes electrical, temperature and mechanical safety aspects.

Unless otherwise specified, the following "transformer" includes general purpose electrical safety isolating transformer and built for safety isolating transformers for general purposes

Source device.

Note 2. (linear) power supply unit, this part applies. Switching power supply unit, IEC 61558-2-16 and applicable in this section.

This section applies to Stationary or mobile, single-phase or multi-phase, air-cooled (self-cooled or air-cooled), with independent and supporting the use of dry-type transformer

Device. Windings may be encapsulated or non-encapsulated type.

Rated supply voltage not exceeding AC 1100V, rated frequency and internal operating frequency not exceeding 500Hz.

Rated output not exceeding.

--- Single-phase transformers, 10kVA;

--- Multiphase transformers, 16kVA.

If the purchaser and the manufacturer otherwise agree, this section also applies to the transformer rated output is not limited.

Note 3. This does not cover intended for distribution network transformer.

Load output voltage or the rated output voltage does not exceed 50V AC or ripple-free DC 120V.

This section does not apply to scheduled to be connected with the input and output terminals of the transformer and its external circuit components.

This section applies to the requirements of insulation between circuits in the installation procedures or equipment specifications for double or reinforced insulation transformer.

Note 4. Note the following.

--- Transformer predetermined use on a vehicle, ship or aircraft, may require some additional requirements (according to other applicable standards, national regulations, etc.);

--- Avoid the housing and the housing components such as protective measures by the outside influence of mold, insects, termites, solar radiation, and icing should also be considered;

--- Transformer transport, storage and different working conditions should also be considered;

--- Intended to be used for special circumstances, such as for the tropical environment transformers can be attached in line with national standards and other applicable rules of order

Canadian requirements.

Note 5. With the future development of transformer technology, may need to increase the upper limit frequency, but before then, you can use this section as a guide.

2 Normative references

In addition to the following references, Part 1 GB 19212.1-2008 Safety of power transformers, power supplies, reactors and similar products

Score. General requirements and tests (IEC 61558-1.2005, IDT) is applicable.

The increase in the following chapter references.

GB 19212.1-2008/IEC 61558.2005 Safety - Part 1 "of power transformers, power supplies, reactors and similar products. pass

With the requirements and testing, "No. 1 amendments (IEC 61558-1Ed2.0AMENDEMENT1, IDT)

3 Terms and Definitions

This chapter applies the GB 19212.1-2008.

4 General requirements

This chapter applies the GB 19212.1-2008.

General Description 5 tests

This chapter applies the GB 19212.1-2008.

6 RATINGS

Except for the following, GB 19212.1-2008 this chapter apply.

The chapter increased the following provisions.

8 Marking and other information

Except for the following, GB 19212.1-2008 this chapter apply.

9 Protection against electric shock

This chapter applies the GB 19212.1-2008.

10 change the input voltage setpoint

This chapter applies the GB 19212.1-2008.

11 load output voltage and output current

This chapter applies the GB 19212.1-2008.

12 no-load output voltage

Except for the following, GB 19212.1-2008 this chapter apply.

The chapter following is added.

When connected to the transformer nominal frequency at ambient temperature rated supply voltage, load output voltage measurement.

13 short-circuit voltage

This chapter applies the GB 19212.1-2008.

Fever 14

This chapter applies the GB 19212.1-2008.

15 short-circuit and overload protection

This chapter applies the GB 19212.1-2008.

16 Mechanical strength

This chapter applies the GB 19212.1-2008.

17 to prevent dust, solid objects and moisture into the harmful Protection

This chapter applies the GB 19212.1-2008.

18 insulation resistance, dielectric strength and leakage current

This chapter applies the GB 19212.1-2008.

19 Structure

Except for the following, GB 19212.1-2008 this chapter apply.

GB 19212.1-2008 19.1 is replaced by the following.

19.1 input and output circuits shall be electrically isolated from each other. There can be no direct or indirect structure should enable these circuits

By connecting other conductive parts, except when you intend to take.

By visual inspection and measurement, taking into account the provisions of Chapter 18 and Chapter 26, to verify eligibility.

19.1.1 In addition to meeting the requirements of 19.1.3 outside, between the input winding and output winding insulation should be strengthened insulation (double insulation or with a work by the

As corresponding to the voltage) composition.

Moreover, it should meet the following requirements.

--- Not ready to plug connected to the mains power supply class I transformer input winding insulation and the ground between its housing should be at least

Basic insulation (corresponding to the input voltage) composition. Isolated output winding and the ground between the housing shall consist of at least basic insulation (with

Corresponding to the voltage output) composition;

--- Ready to plug connected to the mains power supply class I transformer, the input winding insulation and the shell between the basic insulation should be at least

(Operating voltage corresponding to the) constitution. Insulation should be at least (that corresponds to the operating voltage) output by the additional insulation between the windings and the housing

constitute;

--- Of Class II transformer, the input winding insulation and the shell should be between at least double or reinforced insulation (relative to the input voltage

Should) constitute. Insulation between the output windings and the housing should be at least double or reinforced insulation (corresponding to the output voltage) constitute,

SELV circuit requires only basic insulation.

19.1.2 on with no input connected to the housing and positioned intermediate conductive member (such as a core) and output windings of the transformer between the following

Requirements apply.

19.1.2.1 through the intermediate conductive members insulated I and type II transformer between input and output windings shall be double insulated or

Reinforced insulation (corresponding to the operating voltage) components.

--- Of class II transformer winding inter input output windings and the housing and the housing through the insulating intermediate conductive part shall consist of double Jedi

Edge or reinforced insulation (with the input voltage and the output voltage corresponding to the) constitution. For SELV circuit requires only basic insulation;

--- Non-independent transformer (IP00), between the input winding and the output winding through the insulating intermediate conductive part shall consist of double insulation or

Reinforced insulation (corresponding to the operating voltage) composition.

19.1.2.2 19.1.2.1 as an alternative, and not ready for plug connection type I transformers and non-independent transformer (IP00), if

Ensure that all core pieces are grounded on the structure (for example, by welding), while clearly illustrate safety transformer taken in the specification or guide

Depending on the ground connection and can not be used in class II device, the input and output winding winding insulation and a grounded conductive member between the intermediate and

Insulating intermediate ground between the conductive parts shall consist of at least basic insulation (the input and output voltages corresponding to the) constitution.

19.1.2.3 19.1.2.1 and 19.1.2.2 In addition, the intermediate between the conductive member and the input winding and the intermediate conductive member and the output windings

The insulation shall consist of at least basic insulation (the input and output voltages corresponding to the) constitution. Not with the input winding or output winding or at least with housing

Basic insulated from the intermediate conductive part shall be deemed to be received on the corresponding parts.

19.1.3 not prepared to plug connected to the mains power supply class I transformer, insulation between the input winding and the output windings can be used absolutely essential

Edge of a protective shield instead of double or reinforced insulation, subject to the following conditions.

--- Input winding insulation and protection shield between the insulation should meet the basic requirements (corresponding to the input voltage);

--- Output winding insulation and protection shield between the insulation should meet the basic requirements (corresponding to the output voltage);

--- Unless otherwise specified, protective shields shall be constructed of metal foil or wire coil, the shield should be extended to at least the total width of the input winding

Degree, do not leave gaps or voids;

--- When the protective shield does not cover the total width of the input winding, should additionally with adhesive tape or similar material in order to constitute a double HERE

Heavy insulation;

--- If the protective shield is made of a metal foil, it should be insulated from each other between the turns; if there is only one turn, then the insulation overlapping at least

It should be 3mm;

--- With a lead wire and protected by the shield of the shield wire rolling, the cross-section should be at least rated current overload protection device

Cooperate to ensure that in the event of insulation breakdown, overload protection devices in lead damage before the first circuit cut-off;

--- Lead should be welded to the protective screen or fixed in the protective screen has the same reliable in other ways.

Note. The meaning of this section, "winding" does not include an internal circuit.

See an example of the structure of the windings of GB 19212.1-2008 Appendix M.

19.1.4 output circuit and protection should be no connection between the grounding. But for matching transformers, except when related equipment standards allow.

19.1.5 between output circuit and the case should be no connection, but with matching transformer, except when related equipment standards allow.

It should by visual inspection to verify compliance.

19.1.6 input and output terminals for external wiring used should be arranged such that the measurement conductor between the access point at the input and output terminals

Distance of not less than 25mm. If the separator to ensure that this distance should be measured across a separator and bypass the separator application of insulating material

Production and permanently fixed to the transformer.

By visual inspection and measurement should be checked qualified, without regard to the intermediate conductive member.

The chapter increased the following provisions.

20 Component

This chapter applies the GB 19212.1-2008.

21 Internal wiring

This chapter applies the GB 19212.1-2008.

22 Supply connection and other external flexible cable or cord

This chapter applies the GB 19212.1-2008.

23 Terminals for external conductors

This chapter applies the GB 19212.1-2008.

24 protection grounding device

This chapter applies the GB 19212.1-2008.

25 Screws and connections

This chapter applies the GB 19212.1-2008.

26 creepage distances, clearances and distances through insulation

Except for the following, GB 19212.1-2008 this chapter apply.

The chapter increased the following provisions.

26.101 higher than 1000V working voltage creepage distance when, clearances and distances through insulation can be used to obtain extrapolation.

27 heat, fire and resistance to tracking

This chapter applies the GB 19212.1-2008.

28 rust

This chapter applies the GB 19212.1-2008.

appendix

In addition to the following appendices, GB 19212.1-2008 appendix apply.

Appendix C

Creepage distances (cr), clearances (cl) and distances through insulation (dti)

Material Group II (400<=CTI < 600)

Except for the following, GB 19212.1-2008 this appendix apply.

Appendix C, the following is added.

Creepage 1000V working voltage is higher than when the distances, clearances and distances through insulation value can be obtained by extrapolation.

Appendix D

Creepage distances (cr), clearances (cl) and distances through insulation (dti)

Material Group I (CTI>=600)

Except for the following, GB 19212.1-2008 this appendix apply.

Appendix D, the following is added.

Creepage 1000V working voltage is higher than when the distances, clearances and distances through insulation value can be obtained by extrapolation.

Appendix R

IEC 60664-1.2007 4.2 Application Notes

(See GB 19212.1 in 26.2)

Except for the following, GB 19212.1-2008 this appendix apply.

Appendix R following is added.

When the value is higher than the operating voltage of 1000V available extrapolation.

references

[1] IEC 61558-2-16Safetyoftransformers, reactors, powersupplyunitsandsimilarproducts

forsupplyvoltagesupto1100V-Part 2-16. Particularrequirementsandtestsforswitchmodepower

supplyunitsandtransformersforswitchmodepowersupplyunits2).

2) to be released.