This technical specification is applicable for the determination of the d.c. withstand 
characteristics of ceramic and glass insulators to be used outdoors and exposed to polluted 
 atmospheres, on d.c. systems with the highest voltage of the system greater than ± 1 000 V.  
These tests are not applicable to polymeric insulators, to greased insulators or to special 
types of insulators (e.g. insulators with semiconducting glaze or covered with any organic 
insulating material). 
The object of this technical specification is to prescribe procedures for artificial pollution tests 
applicable to insulators for overhead lines, substations and traction lines and to bushings. 
It may also be applied to hollow insulators with suitable precautions to avoid internal 
flashover. In applying these procedures to apparatus incorporating hollow insulators, the 
relevant technical committees should consider their effect on any internal equipment and the 
special precautions which may be necessary.dition 2.0 2015-03 TECHNICAL SPECIFICATION Artificial pollution tests on high-voltage ceramic and glass insulators to be used on d.c. systems IEC TS 61245:2015-03(en) THIS PUBLICATION IS COPYRIGHT PROTECTED Copyright ？ 2015 IEC, Geneva, Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mec