NBN EN 61986 : 2002

1 Scope
2 Normative references
3 Symbols and units
4 General test requirements
5 Principle of superposition tests
   5.1 General
   5.2 Permissible temperature rise at superposition
       tests
6 Superposition methods for induction motors
   6.1 Method of reduced voltage and rated current
   6.2 Method of rated voltage and reduced current
   6.3 Method for wound-rotor induction motors
7 Superposition methods for synchronous machines
   7.1 Method of open circuit, short circuit, zero
       excitation
   7.2 Method of zero power factor and open circuit
       loading
8 Superposition method for d.c. machines
9 Principle of equivalent load tests
   9.1 General
   9.2 Permissible temperature rise at equivalent
       load tests
10 Equivalent load tests for induction motors
   10.1 Forward short-circuit test
   10.2 Modulated frequency method
   10.3 DC injection
   10.4 Mixed-frequency or bi-frequency method
11 Equivalent load test for synchronous machines -
   Zero power factor
Annex ZA (normative) Normative references to
         international publications with their
         corresponding European publications

Gives descriptions of various indirect load tests, the purpose of which is to determine the temperature rise of rotating electrical machines, including a.c. induction machines, a.c. synchronous machines and d.c. machines.