IEEE 1313.2 Guide for the Application of Insulation Coordination

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IEEE 1313.2 Document Information:

Title
Guide for the Application of Insulation Coordination

The Institute of Electrical and Electronics Engineers, Inc.

Publication Date:
Jun 26, 1999

Scope:

The insulation coordination standard and guide apply to three-phase ac systems above 1 kV and are divided into two parts.

IEEE Std 1313.1-1996 (Part 1) specifies the procedure for selection of the withstand voltages [basic lightning impulse insulation level (BIL) and basic switching impulse insulation level (BSL)] for equipment phase-ground and phase-phase insulation systems. It also identifies a list of standard insulation levels. Although the principles of this standard also apply to transmission line insulation systems, the insulation levels may be different from those identified as standard insulation levels.

This guide (Part 2) is an application guide with practical examples, intended to provide guidance in the determination of the withstand voltages and to suggest calculation methods and procedures. The insulation coordination examples for selected equipment are designed to explain the principles of Part 1. The guide is intended for air-insulated ac systems; caution should be exercised in the case of gas-insulated systems (GIS).

Keywords:

protective margin

clearances

atmospheric correction factor

backflash

ground fault factor

protective radio

standard withstand voltages

phase-to-ground insulation configuration

overvoltage

insulation design

insulation coordination

voltage stress

basic switching impulse insulation level (BSL)

phase-to-phase insulation configuration

shielding failures

basic lightning impulse level (BIL)

crest value

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