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CSA CAN/CSA-E742-94
English -- Isolating Transformers and Safety Isolating Transformers Requirements - General Instruction No. 1: June 1994;
French -- Transformateurs De Separation Des Circuits Et Transformateurs De Securite - General Instruction No. 1: June 1994
Organization:
CSA - CSA Group
Year: 2009
Abstract: This standard is applicable to stationary or portable, single-phase or polyphase, air-cooled isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V alternating current and 1000 √2 V unsmoothed direct current and rated frequency not exceeding 500 Hz, the rated output not exceeding:
- for isolating transformers:
25 kVA for single-phase transformers
40 kVA for polyphase transformers
- for safety isolating transformers:
10 kVA for single-phase transformers
16 kVA for polyphase transformers
The no-load and rated output voltages do not exceed:
- for isolating transformers 1 000 V a.c. and 1 000 √2 V unsmoothed d.c.;
- for safety isolating transformers 50 V a.c. r.m.s., and/or 50 √2 V unsmoothed d.c., between conductors or between any conductor and earth.
Rated values are indicated in supplementary parts, Chapters II and III, appropriate to each type of transformer.
This standard is applicable to those isolating transformers used when the installation rules call for the separation of circuits for the supply of certain parts of the circuit or of equipment (shavers, portable tools, lawn mowers, etc.).
This standard is applicable to safety isolating transformers used for the supply of circuits for safety extra-low voltage equipment (toys, bells, portable tools, handlamps, etc.). It 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 or encapsulated transformers. It is not applicable to transformers filled with liquid dielectrics or pulverised materials.
In locations where special environmental conditions prevail, particular requirements may be necessary in accordance with IEC Publication 364-5-51: Electrical Installations of Buildings, Part 5: Selection and Erection of Electrical Equipment. Chapter 51: Common Rules.
Object
The main object of this standard is to establish safety requirements for isolating transformers and safety isolating transformers.
- for isolating transformers:
25 kVA for single-phase transformers
40 kVA for polyphase transformers
- for safety isolating transformers:
10 kVA for single-phase transformers
16 kVA for polyphase transformers
The no-load and rated output voltages do not exceed:
- for isolating transformers 1 000 V a.c. and 1 000 √2 V unsmoothed d.c.;
- for safety isolating transformers 50 V a.c. r.m.s., and/or 50 √2 V unsmoothed d.c., between conductors or between any conductor and earth.
Rated values are indicated in supplementary parts, Chapters II and III, appropriate to each type of transformer.
This standard is applicable to those isolating transformers used when the installation rules call for the separation of circuits for the supply of certain parts of the circuit or of equipment (shavers, portable tools, lawn mowers, etc.).
This standard is applicable to safety isolating transformers used for the supply of circuits for safety extra-low voltage equipment (toys, bells, portable tools, handlamps, etc.). It 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 or encapsulated transformers. It is not applicable to transformers filled with liquid dielectrics or pulverised materials.
In locations where special environmental conditions prevail, particular requirements may be necessary in accordance with IEC Publication 364-5-51: Electrical Installations of Buildings, Part 5: Selection and Erection of Electrical Equipment. Chapter 51: Common Rules.
Object
The main object of this standard is to establish safety requirements for isolating transformers and safety isolating transformers.
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CSA CAN/CSA-E742-94
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| contributor author | CSA - CSA Group | |
| date accessioned | 2017-09-04T17:33:03Z | |
| date available | 2017-09-04T17:33:03Z | |
| date copyright | 1994.06.01 (R 2009) | |
| date issued | 2009 | |
| identifier other | DBVCDFAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/156005 | |
| description abstract | This standard is applicable to stationary or portable, single-phase or polyphase, air-cooled isolating and safety isolating transformers, associated or otherwise, having a rated supply voltage not exceeding 1000 V alternating current and 1000 √2 V unsmoothed direct current and rated frequency not exceeding 500 Hz, the rated output not exceeding: - for isolating transformers: 25 kVA for single-phase transformers 40 kVA for polyphase transformers - for safety isolating transformers: 10 kVA for single-phase transformers 16 kVA for polyphase transformers The no-load and rated output voltages do not exceed: - for isolating transformers 1 000 V a.c. and 1 000 √2 V unsmoothed d.c.; - for safety isolating transformers 50 V a.c. r.m.s., and/or 50 √2 V unsmoothed d.c., between conductors or between any conductor and earth. Rated values are indicated in supplementary parts, Chapters II and III, appropriate to each type of transformer. This standard is applicable to those isolating transformers used when the installation rules call for the separation of circuits for the supply of certain parts of the circuit or of equipment (shavers, portable tools, lawn mowers, etc.). This standard is applicable to safety isolating transformers used for the supply of circuits for safety extra-low voltage equipment (toys, bells, portable tools, handlamps, etc.). It 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 or encapsulated transformers. It is not applicable to transformers filled with liquid dielectrics or pulverised materials. In locations where special environmental conditions prevail, particular requirements may be necessary in accordance with IEC Publication 364-5-51: Electrical Installations of Buildings, Part 5: Selection and Erection of Electrical Equipment. Chapter 51: Common Rules. Object The main object of this standard is to establish safety requirements for isolating transformers and safety isolating transformers. | |
| language | English, French | |
| title | CSA CAN/CSA-E742-94 | num |
| title | English -- Isolating Transformers and Safety Isolating Transformers Requirements - General Instruction No. 1: June 1994 | en |
| title | French -- Transformateurs De Separation Des Circuits Et Transformateurs De Securite - General Instruction No. 1: June 1994 | other |
| type | standard | |
| page | 286 | |
| status | Active | |
| tree | CSA - CSA Group:;2009 | |
| contenttype | fulltext |