CSA C60044-1 : 2007 : R2011
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
INSTRUMENT TRANSFORMERS - PART 1: CURRENT TRANSFORMERS
Hardcopy , PDF
01-12-2014
English
01-01-2011
1 General
1.1 Scope
1.2 Normative references
2 Definitions
2.1 General definitions
2.2 Additional definitions for measuring current
transformers
2.3 Additional definitions for protective current
transformers
3 Normal and special service conditions
3.1 Normal service conditions
3.2 Special service conditions
3.3 System earthing
4 Ratings
4.1 Standard values of rated primary currents
4.2 Standard values of rated secondary currents
4.3 Rated continuous thermal current
4.4 Standard values of rated output
4.5 Short-time current ratings
4.6 Limits of temperature rise
5 Design requirements
5.1 Insulation requirements
5.2 Mechanical requirements
6 Classification of tests
6.1 Type tests
6.2 Routine tests
6.3 Special tests
7 Type tests
7.1 Short-time current tests
7.2 Temperature-rise test
7.3 Impulse tests on primary winding
7.4 Wet test for outdoor type transformers
7.5 Radio interference voltage measurement
8 Routine tests
8.1 Verification of terminal markings
8.2 Power-frequency withstand tests on primary
windings and partial discharge measurement
8.3 Power-frequency withstand tests between sections
of primary and secondary windings and on secondary
windings
8.4 Inter-turn overvoltage test
9 Special tests
9.1 Chopped impulse test on primary winding
9.2 Measurement of capacitance and dielectric
dissipation factor
9.3 Mechanical tests
9.4 Transmitted overvoltages measurement
10 Markings
10.1 Terminal markings - General rules
10.2 Rating plate markings
11 Additional requirements for measuring current
transformers
11.1 Accuracy class designation for measuring current
transformers
11.2 Limits of current error and phase displacement
for measuring current transformers
11.3 Extended current ratings
11.4 Type tests for accuracy of measuring current
transformers
11.5 Routine tests for accuracy of measuring current
transformers
11.6 Instrument security current
11.7 Marking of the rating plate of a measuring
current transformer
12 Additional requirements for protective current
transformers
12.1 Standard accuracy limit factors
12.2 Accuracy classes for protective current transformer
12.3 Limits of errors for protective current transformers
12.4 Type and routine tests for current error and
phase displacement of protective current transformers
12.5 Type tests for composite error
12.6 Routine tests for composite error
12.7 Marking of the rating plate of a protective
current transformer
13 Additional requirements for class PR protective current
transformers
13.1 Standard accuracy limit factors
13.2 Accuracy classes for class PR protective current
transformers
13.3 Limits of error for class PR protective current
transformers
13.4 Type and routine tests for current error and
phase displacement of class PR protective current
transformers
13.5 Marking of rating plate of class PR current
transformers
14 Additional requirements for class PX protective current
transformers
14.1 Specification of performance for class PX
protective current transformers
14.2 Insulation requirements for class PX protective
current transformers
14.3 Type tests for class PX protective current
transformers
14.4 Routine tests for class PX protective current
transformers
14.5 Marking of rating plate of class PX current
transformers
Annex A (normative) - Protective current transformers
Annex B (informative) - Multiple chopped impulse test
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