GB/T 4207-2012: Method for the determination of the proof and the comparative tracking indices of solid insulating materials

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Scope

This Standard specifies the method of test for the determination of the proof
and comparative tracking indices of solid insulating materials on pieces taken
from parts of equipment and on plaques of material using alternating voltages.
The standard provides for the determination of erosion when required.
NOTE 1: The proof tracking index is used as an acceptance criterion as well as a means
for the quality control of materials and fabricated parts. The comparative tracking index is
mainly used for the basic characterization and comparison of the properties of materials.
Test results cannot be used directly for the evaluation of safe creepage
distances when designing electrical apparatus.
NOTE 2: This test discriminates between materials with relatively poor resistance to
tracking, and those with moderate or good resistance, for use in equipment which can be
used under moist conditions. More severe tests, of longer duration are required for the
assessment of performance of materials for outdoor use, utilizing higher voltages and
larger test specimens (see the inclined plane test of IEC 60587). Other test methods such
as the inclined method may rank materials in a different order from the drop test given in
this Standard.

Basic Data

Standard ID	GB/T 4207-2012 (GB/T4207-2012)
Description (Translated English)	Method for the determination of the proof and the comparative tracking indices of solid insulating materials
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	K15
Classification of International Standard	29.035.99
Word Count Estimation	20,263
Older Standard (superseded by this standard)	GB/T 4207-2003
Quoted Standard	GB/T 17037.1-1997; GB/T 17037.3-2003; IEC 104 GUIDE; ISO 293-1986; ISO 295-1991
Adopted Standard	IEC 60112-2009, IDT
Regulation (derived from)	National Standards Bulletin No. 41 of 2012
Issuing agency(ies)	General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China
Summary	This standard specifies the solid insulating material resistant to tracking and comparative tracking index measurement method for equipment components and materials used discoid alternating voltage of the occasion. This standard specifies the requirements