BS EN ISO 5826:2014

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Construction, additional equipment
6 Physical environment and operating conditions
7 Tests
8 Protection against electric shock
9 Thermal rating
10 Rated output voltage
11 No-load input current (I[10])
12 Short-circuit voltage (U[cc])
13 Output current under load condition
14 Cooling liquid circuit
15 Dynamic behaviour
16 Rating plate
17 Instruction manual
Annex A (informative) - Example of a rating plate
Annex B (normative) - Corrections for higher altitudes
         and cooling medium temperatures
Annex C (informative) - Notes on physical concepts and
         comments on some definitions
Annex D (informative) - Type code for single-phase
         transformers for alternating welding current
Bibliography

Provides specifications applicable to the following types of transformers for use in resistance welding equipment: - single-phase transformers for a.c. welding, typically operating at 50 Hz or 60 Hz; - single-phase transformers with connected rectifier for d.c. welding, typically operating at 50 Hz or 60 Hz; - single-phase inverter transformers with connected rectifier for d.c. welding, typically operating at 400 Hz to 2 kHz; - three-phase transformers with connected rectifier for d.c. welding, typically operating at 50 Hz or 60 Hz.

This International Standard gives specifications applicable to the following types of transformers for use in resistance welding equipment:

• single-phase transformers for a.c. welding, typically operating at 50Hz or 60Hz;

• single-phase transformers with connected rectifier for d.c. welding, typically operating at 50Hz or 60Hz;

• single-phase inverter transformers with connected rectifier for d.c. welding, typically operating at 400Hz to 2kHz;

• three-phase transformers with connected rectifier for d.c. welding, typically operating at 50Hz or 60Hz.

For the purposes of this International Standard, the term transformer can refer to the transformer alone or with connected rectifier (transformer-rectifier unit).

This International Standard applies to transformers built to protection class I or II according to IEC61140.

NOTE The requirements of this International Standard can be supplemented by other resistance welding transformer standards, e.g. ISO22829 and ISO10656.