Page 330 - Practical Power System and Protective Relays Commissioning

Chapter 20

Protective Relays Testing and

Commissioning

INTRODUCTION
In this chapter we explain the required testing at startup of a plant or substation
for protective relays.

Subchapter 20.1

Protective Relays Testing and
Commissioning

20.1.1 INTRODUCTION

There are different types of relay testing as described below.
The several standard tests done in a factory are called type tests and to be
done when we introduce a relay in a utility network.
Commissioning or site acceptance test are less in their steps than the
above type tests and more related to the actual operation of relays at the
network. Routine maintenance tests are done internally in regular time to
detect any faults in the protective relays. Electromechanical relays require
these tests in more regularly as these relays have more moving parts than
static digital relays which have self testing facilities which can detect any
fault on the relay components to give an alarm and block operation of the
relay when the fault affects the proper operation of the relay.

20.1.2 COMMISSIONING TESTS OF PROTECTIVE RELAYS

In general these tests include the following.

Practical Power System and Protective Relays Commissioning.
DOI: https://doi.org/10.1016/B978-0-12-816858-5.00020-4 325
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