Table of Contents

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Definitions
4 Thermal protection limits
5 Protection against thermal overloads with slow variation
6 Protection against thermal overloads with rapid variation
7 Restart after tripping
8 Type Tests
  8.1 General
  8.2 Verification of temperature due to the thermal overloads
      with slow variation
  8.3 Verification of temperature due to thermal overloads
      with rapid variation
9 Routine tests
Figure 1 - Example of thermal overload with slow variation and
           direct thermal protection
Figure 2 - Example of thermal overload with slow variation in
           the case of too intensive intermittent periodic duty
           with starting (duty S4) and direct thermal protection
Figure 3 - Example of thermal overload with rapid variation
           where the thermally critical part has direct thermal
           protection
Figure 4 - Example of thermal overload with rapid variation
           where the thermally critical part has indirect
           thermal protection
Table 1 - Maximum winding temperatures for overloads with slow
          variation
Table 2 - Maximum winding temperatures for overloads with rapid
          variation

Abstract

Specifies requirements relating to the use of thermal protectors and thermal detectors incorporated into the stator windings or placed in other suitable positions in induction machines in order to protect them against serious damage due to thermal overloads. Applicable to machines manufactured in accordance with IEC 60034-12 with the voltage limits specified in IEC 60034-12.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	International Electrotechnical Committee
Pages
ISBN