Date Code 20171006 Instruction Manual SEL-400 Series Relays
Instruction Manual
SECTION 3
Basic Relay Operations
SEL-400 series relays are power tools for power system protection and control.
Understanding basic relay operation principles and methods will help you use the
relay effectively. This section presents the fundamental knowledge you need to
operate the relay, organized by task. These tasks help you become familiar with
the relay and include the following:
➤ Inspecting a New Relay on page 3.1
➤ Establishing Communication on page 3.3
➤ Access Levels and Passwords on page 3.7
➤ Checking Relay Status on page 3.11
➤ Making Simple Settings Changes on page 3.15
➤ Examining Metering Quantities on page 3.35
➤ Examining Relay Elements on page 3.43
➤ Reading Oscillograms, Event Reports, and SER on page 3.48
➤ Operating the Relay Inputs and Outputs on page 3.61
➤ Configuring Timekeeping on page 3.75
➤ Readying the Relay for Field Application on page 3.77
Perform these tasks to gain a good understanding of relay operation, be able to
confirm that the relay is properly connected, and be more effective when using
the relay. To work through the examples in this section, you need to install the
relay either in a final installation or in a laboratory configuration. See Section 2:
Installation in the product-specific instruction manual for more information.
Inspecting a New Relay
NOTE: Do not connect power to the
relay until you have completed your
inspection of the relay. See the
product-specific Installation section
for details on applying power. Failure
to follow these instructions can lead
to equipment damage.
The following items are included in your shipment from SEL:
➤ Relay
➤ CD-ROM containing the electronic version of the entire Relay
Manual and the Customer Label Templates
➤ CD-ROM containing the ACSELERATOR QuickSet SEL-5030
Software program
➤ Configurable Front-Panel Label Kit
➤ SEL Contact Card
If any item is missing or damaged, please contact your distributor or SEL immediately.
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