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IEC 61972:2002

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

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superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

Method for determining losses and efficiency of three-phase cage induction motors
Available format(s)

Hardcopy , PDF , PDF 3 Users , PDF 5 Users , PDF 9 Users

Superseded date

01-10-2008

Language(s)

English - French

Published date

11-22-2002

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
  3.1 Terms and definitions
  3.2 Symbols
4 Test requirements
  4.1 Power supply
  4.2 Instrumentation
  4.3 Limits of uncertainty
5 Test procedure
  5.1 General
  5.2 Temperature of machine before test
  5.3 Tests under load
  5.4 No-load test at variable voltage
6 Determination of efficiency
  6.1 General
  6.2 No-load losses
  6.3 Additional-load losses
  6.4 Reference coolant temperature corrections
  6.5 Efficiency
  6.6 Efficiency at specific load points
Annex A (informative) Recommended form for calculation of
        motor efficiency
Annex B (informative) Linear regression analysis
Annex C (normative) Correction of dynamometer torque readings
Figures

Establishes two methods for determination of efficiency:Method 1: for motors tested by using a torque measurement device, with additional load losses derived from measurements;Method 2: for motors tested without torque measurement, with assigned additional load losses.

DocumentType
Standard
Pages
39
PublisherName
International Electrotechnical Committee
Status
Superseded
SupersededBy

08/30165047 DC : DRAFT JUNE 2008 BS EN ISO 9906 - ROTODYNAMIC PUMPS - HYDRAULIC PERFORMANCE ACCEPTANCE TESTS

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