Description
BS PD IEC/TS 60815-4 – Selection and dimensioning of high-voltage insulators intended for use in polluted conditions
BS PD IEC/TS 60815-4:2016, which is a Technical Specification, is applicable as first approach forthe determination of the required d.c. Unified Specific Creepage Distance for insulators withrespect to pollution. To avoid excessive over or under design, existing operation experienceshould be compared and eventually additional appropriate tests may be performed byagreement between supplier and customer.
It is applicable to:
- Glass and porcelain insulators;
- Composite and hybrid insulators with an HTM or non-HTM housing.
This part of IEC 60815 gives specific guidelines and principles to arrive at an informedjudgement on the probable behaviour of a given insulator in certain pollution environments.
The structure and approach of this part of IEC 60815 are similar to those explained in Part 1,but adapted for the specific issues encountered with polluted HV d.c. insulation.
The aim of this Technical Specification is to give the user simplified means to:
- Identify issues specific to d.c. applications that can affect the choice and design process;
- Determine the equivalent d.c. Site Pollution Severity (SPS) from measurements, correctingfor electrostatic effects, diameter, pollution distribution and composition;
- Determine the reference USCD for different candidate insulating solutions, taking intoaccount materials, dimensions and risk factors;
- Evaluate the suitability of different insulator profiles;
- Discuss the appropriate methods to verify the performance of the selected insulators, ifrequired;
This simplified process is intended to be used when comparable operational experience fromexisting d.c. system is incomplete or not available.
The simplified design approach might result in a solution that exceeds the physical constraintsof the project. More refined approaches for such cases, e.g. using a statistical approach, aregiven in the CIGRE d.c. guidelines [1]. In extreme cases, e.g. for exceptionally severe siteconditions, alternative solutions such as changing the line route, relocation of converterstations or using an indoor d.c. yard may need to be considered.
Cross References:
IEC/TS 61245
IEC/TS 60815-1:2008
IEC/TS 60815-2
IEC/TS 60815-3
IEC/TS 62073
CIGRE C4.303
CIGRE Taskforce 33.04.01
All current amendments available at time of purchase are included with the purchase of this document.
Product Details
- Published:
- 11/30/2016
- ISBN(s):
- 9780580767456
- Number of Pages:
- 34
- File Size:
- 1 file , 2.9 MB
- Product Code(s):
- 30253458, 30253458, 30253458
- Note:
- This product is unavailable in Ukraine, Russia, Belarus
