3.46
SEL-400 Series Relays Instruction Manual Date Code 20171006
Basic Relay Operations
Examining Relay Elements
Step 6. Connect a test source to the relay.
a. Set the current output of a test source to zero output level.
b. Connect a single-phase current output of the test source to the
IAW analog input.
Step 7. View the target status change.
a. Increase the current source to produce a current magnitude
greater than 15.00 A secondary in the relay.
b. Observe the 50P1 target on the front-panel display.
You will see the 50P1 element status change to 1 when the input
current exceeds the 50P1P setting threshold.
Step 8. Press ESC to return to the
MAIN MENU.
View Relay Elements Using the Front-Panel LED
The procedure in the following steps shows you how to use a front-panel LED to
view a change-in-state for the SEL-451 50P1 Phase-Instantaneous Overcurrent
element.
In this example, use QuickSet to configure the relay. You must have a computer
that is communicating with the relay and running QuickSet (see Making Settings
Changes in Initial Global Settings on page 3.20). In addition, you need a variable
current source suitable for relay testing.
Step 1. Prepare to control the relay with QuickSet by establishing communi-
cation, checking passwords, and reading relay settings.
Step 2. Set a pushbutton LED SEL
OGIC control equation.
a. Expand the Front Panel branch of the Settings tree view and
click Pushbuttons (see Figure 3.37).
QuickSet displays the Pushbuttons dialog box similar to that
shown in Figure 3.37.
b. Click in the PB6_LED text box and type 50P1.
c. Tab or click to any other text box.
QuickSet checks the validity of the setting.
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