CEl IEC 60034-18-22:2000 pdf download

CEl IEC 60034-18-22-2000 pdf download.Rotating electrical machines -Part 18-22: Functional evaluation of insulation systems -Test procedures for wire-wound windings -Classification of changes and insulationcomponent substitutions.
The resinous (enamel) coating or wrapped insulation, fibrous or film, on winding wire.
3.1.3 Impregnating varnishes
These include both solvented and solventless varnishes.
3.1.4 Encapsulant
Moulded or cast insulation which completely encases the insulation system and which is the only barrier between the winding and the outer surface of the motor.
3.2 Category II insulation components
Category II components include any constituent of an insulation system not covered by 3.1, as listed below. If the testing organization wants to consider some of these components as category I insulation components, it may do so.
a) Series/parallel winding insulation as used on multi-voltage windings
b) Insulation between auxiliary and main winding as used on single-phase motors. This is not to be considered as phase insulation as described in 3.1.1.
NOTE If winding insulation according to item a) or b) above is, in normal operation, stressed like phase
insulation, then it must be tested as a category I component.
c) Layer insulation: insulation which is interleaved between successive layers of insulated wire in the same winding (same phase)
d) Sleeving and tubing
e) Slot wedges and closures
NOTE If, in normal operation, the closure is stressed like the slot liner, then it must be tested as a category I component.
f) Securement tapes and tie-cords
g) Lead wire insulation
3.3 Definition of generic identity
Generic identity embraces both chemical and physical identity. Chemical composition shall be established from analytical data which should, for instance, be based on appropriate spectroscopic analysis (IR, etc.) complemented with thermogravimetric, DTA and atomic absorption analysis.
Physical identity shall be established by mechanical and electrical tests appropriate to the component. DTA analysis can complement these tests.
For several properties, like tan and modulus, dependence on temperature can complement both the chemical and physical picture.
Where the insulation component is made from more than one material, for example an adhesive bonded laminate, a mineral filled encapsulant, or a dual coat winding wire, generic identity shall be established with respect to each material of the component separately. In the case of a filled component, the relative amounts of filler and polymeric material shall be the same in both candidate and reference material.
4 Documentation
The following information shall be obtained for any proposed substitution material:
a) detailed chemical analysis;
b) supplier and reference;
c) thickness;
d) thermal endurance, such as temperature index, and relevant standard or specification, for example:
1) IEC 60317 type for winding wire,
2) voltage rating, style or type for lead wire.
The same information is also required for the reference system.
5 General substitution procedures
The test procedures to be followed for any particular substitution depend on the specific substitution involved. These are in clause 6.
Any substitution to an insulation system shall be classified as a substitution procedure A, B, C or D. The action required in respect of validation for each procedure is listed below.
NOTE Procedures A, B, and C are considered minimum requirements. At the discretion of the testing organisation procedure D may be used in place of procedures A, B or C.
— Procedure A
If the data enables the investigator to establish the generic identity according to 3.3, documentation data as described in clause 4 is sufficient to accept substitution without test.
— Procedure B
Change requiring sealed tube test procedure (see clause 7).
— Procedure C
Change requiring a single temperature ongoing programme using a procedure, for example motorette procedure, selected from IEC 60034-18-21.
— Procedure D
Change requiring a full three-temperature test procedure as required by IEC 60034-18-21. Specific component substitutions are assigned to one of the above categories in clause 6.
6 Component substitution category
6.1 Category I component substitution
6.1.1 Phase insulation and ground insulation
6.1.1.1 Generically identical, the same or increased thickness
Procedure A applies.
6.1.1.2 Generically identical but thinner
Procedure C applies.