Date Code 20020501 SEL-421/SEL-421-1 Relay
Preface
This manual provides information and instructions for installing and operating
the SEL-421 Relay. The three volumes that comprise this manual are for use
by power engineers and others experienced in protective relaying applications.
Included are detailed technical descriptions of the relay and application
examples. While this manual gives reasonable examples and illustrations of
relay uses, you must exercise sound judgment at all times when applying the
SEL-421 Relay in a power system.
Use this manual for both the SEL-421 Relay and the SEL-421-1 Relay.
Margin notes next to the text specify differences between the two relay models
when these differences affect relay functions or operations.
To Next Page
Loading...
