Hello. Sign In
Standards Store




Look Inside

IEEE C57.13.1

2017 Edition, December 6, 2017

Complete Document

Guide for Field Testing of Relaying Current Transformers



View Abstract
Product Details
Document History

Detail Summary

Active, Most Current

EN
Format
Details
Price (USD)
PDF
Single User
$60.00
Print
In Stock
$75.00
Add to Cart

People Also Bought These:

ASME G00010
ISA RP105.00.01
IEEE 142
NFPA 850

Product Details:


Description / Abstract:

The scope of this guide is to describe field test methods that assure current transformers (CTs) are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after being in service for a period of time.

Annex A describes wiring integrity checks, the use of test jacks, current-shorting switches, and relay test equipment.

Annex B illustrates excitation voltage measurement differences between rms responding voltmeters (commonly used under field conditions) and average responding voltmeters (commonly used in laboratory tests) and also discusses the effect of the source impedance.

Annex C describes the characteristics, and other pertinent information, of optical current sensor systems used with protective relaying. It provides an overview of the components used in an optical sensor system, discusses the differences from conventional CTs, and provides testing information.

Annex D is the bibliography for this guide.

Purpose

The purpose of the guide is to provide information on the current technology for field testing of instrument transformers and to more closely coordinate the information with the other industry standards, for example, the National Electrical Safety Code® (NESC®) (Accredited Standards Committee C2).3

3Information on references can be found in Clause 2.