Date Code 20010719 701 Motor Protection Relay
Commissioning
Relay Commissioning Procedure
7.3
Step 4. Connect the PC to the relay using the appropriate serial cable (SEL
Cable C234A or a null-modem cable). Start the PC and terminal
emulation software or SEL-701PC software. Establish
communication with the relay at Access Level 1. Refer to Section 6:
ASCII Serial Port Operation for more information on serial port
communications. Refer to Section 3: SEL-701PC Software for more
information on the SEL-701PC software. Enter Access Level 2 using
the factory default password, 701.
HINT: Use the HELP command at any Access Level to get a list of
available serial port commands.
Step 5. Using the front-panel Set Relay\Date and Set Relay\Time functions
or serial port DATE and TIME commands, set the correct relay clock
time and, if necessary, date.
Step 6. Using the front-panel Set Relay\Password or serial port Access Level
2 PASSWORD command, enter your new Access Level 2 password.
Be sure to record the new password in a safe location.
Step 7. Using the SEL-701PC software or the SET, SET R, and SET P
commands, enter relay settings according to the Settings Sheets for
your application. If you are using the SEL-701PC software, you can
use it to develop, store, and transfer settings to the SEL-701 Relay.
See Section 3: SEL-701PC Software for more details on the
SEL-701PC software.
Step 8. If you are using an SEL-2600 RTD Module, connect the fiber-optic
cable to the module fiber-optic output. At the relay-end of the fiber,
you should be able to see a red light that indicates the module is
sending data. Plug the relay-end of the fiber into the relay fiber-optic
receiver input.
Step 9. Verify relay ac connections. Connect the protective relay ac test
signal source to the SEL-701 Relay through the motor control center
wiring. (You may connect directly to the relay; however, this does not
verify the accuracy of the wiring in the motor control center.) Apply
rated ac current (1 A or 5 A) to the relay phase current inputs. If the
relay is equipped with voltage inputs, apply rated voltage for your
application to the relay phase voltage inputs.
If you set the relay to accept phase-to-neutral voltages
(DELTA_Y = Y), set the current and/or voltage source phase
angles as shown in Figure 7.1.
If you use open-delta potentials, set the test source phase angles
as shown in Figure 7.2.
When you set the relay to accept single-phase voltage
(SINGLEV = Y), you can connect and apply VA or VAB only.
Use the front-panel Meter Values\Instantaneous Meter function
or serial port METER command to verify that the relay is
measuring the magnitude and phase angle of both voltage and
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