IEEE 1427-2006
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
View Superseded by
IEEE Guide for Recommended Electrical Clearances and Insulation Levels in Air Insulated Electrical Power Substations
04-26-2021
English
05-04-2007
1 Overview
1.1 Scope
1.2 Purpose
2 Normative references
3 Definitions
4 Criteria
4.1 Safety codes and regulations
4.2 Basic lightning impulse insulation level criteria
4.3 Radio interference voltage and corona criteria
4.4 Operating history
4.5 Economic aspects
4.6 Community acceptance
5 Substation insulation coordination
5.1 Protective margins and arrester maximum continuous
operating voltage
5.2 Selection of basic lightning impulse insulation level
and basic switch impulse insulation level
5.3 Selection of electrical clearances
6 Electrical operating/design clearances
6.1 General discussions
6.2 Historical background
6.3 Clearances based on lightning impulse conditions
6.4 Clearances based on switching surge conditions
7 Electric maintenance/safety clearances
8 Substation voltage uprating and compact design
8.1 BIL/System voltage ratio concept
8.2 Other considerations
Annex A (informative) Bibliography
Annex B (informative) Example calculations
Access your standards online with a subscription
Features
-
Simple online access to standards, technical information and regulations.
-
Critical updates of standards and customisable alerts and notifications.
-
Multi-user online standards collection: secure, flexible and cost effective.