BS 171-2:1978
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
Power transformers Specification for temperature rise requirements
Hardcopy , PDF
09-15-1997
English
08-31-1978
Foreword
Cooperating organizations
Clause
1 Identification according to cooling method
1.1 Identification symbols
1.2 Arrangement of symbols
2 Temperature-rise limits
2.1 Normal temperature-rise limits
2.2 Reduced temperature rises for transformers designed
for high cooling medium temperatures or special air
cooling conditions
2.3 Reduced temperature rises for transformers designed
for high altitudes
3 Test of temperature rise (type test)
3.1 Measurement of the temperature of cooling air
3.2 Measurement of the temperature of cooling water
3.3 Determination of the winding temperature
3.4 Measurement of the top oil temperature
3.5 Duration of the test of temperature rise
3.6 Test method for dry-type transformers
3.7 Test method for oil-immersed type transformers
3.8 Loading methods
3.9 Temperature correction for cooling of transformers
after switching off the supply
Figures
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