3.62
SEL-400 Series Relays Instruction Manual Date Code 20171006
Basic Relay Operations
Operating the Relay Inputs and Outputs
Pulsing a Control Output in the Terminal
When first connecting the relay, or at any time that you want to test relay control
outputs, perform the following procedure. The procedure in the following steps
shows how to use a communications terminal to pulse the control output contacts.
Perform the steps in this example to become familiar with relay control and serial
communication. For more information on the PULSE command, see PULSE on
page 14.45.
This example assumes that you have successfully established communication
with the relay; see Making an EIA-232 Serial Port Connection on page 3.4 for a
step-by-step procedure. In addition, you must be familiar with relay access levels
and passwords (see Changing the Default Passwords in the Terminal on
page 3.10 to change the default access level passwords).
NOTE: To pulse an output, the circuit
breaker control enable jumper must
be installed on the main board.
Step 1. Prepare to control the relay at Access Level B.
a. Using a communications terminal, type ACC <Enter>.
b. Type the Access Level 1 password and press <Enter>.
You will see the Access Level 1 => prompt.
c. Type BAC <Enter>.
d. Type the correct password to go to Access Level B.
You will see the Access Level B ==> prompt.
Step 2. Attach an indicating device (ohmmeter with a beep sounder or a test
set) to the terminals for control output OUT104.
This output is a standard control output and is not polarity-sensitive.
Step 3. Perform the pulse operation.
a. Type PULSE OUT104 <Enter>.
The relay confirms your request to pulse an output with a prompt
such as that shown in Figure 3.55.
b. Type Y <Enter> at the prompt.
You will see or hear the indicating device turn on for a second
and then turn off.
You can also pulse an output for longer than the default one-second period. If you
enter a number after the PULSE command, that number specifies the duration in
seconds for the pulse. For example, if you enter PULSE OUT104 3 <Enter>, the
relay pulses OUT104 for three seconds.
Pulsing a Control Output on the Front Panel
The procedure in the following steps shows you how to use the front-panel dis-
play and navigation pushbuttons to check for proper operation of the relay con-
trol outputs. See Section 4: Front-Panel Operations for information on using the
relay front panel.
Step 1. Attach an indicating device (an ohmmeter with a beep sounder or a
test set) to the terminals for control output OUT104.
This output is a standard control output and is not polarity-sensitive.
==>PULSE OUT104 <Enter>
Pulse contact OUT104 for 1 seconds(Y/N) ? Y <Enter>
==>
Figure 3.55 Terminal Display for PULSE Command
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