Schweitzer Engineering SEL-387-0, Instruction Manual

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10.5
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Testing and Troubleshooting
Acceptance Testing
Method:
a. Execute the STATUS command from the serial port or
front panel, and inspect the voltage readings for the
power supply.
b. Verify that JMP1 is installed for SERIAL Port 3 and JMP2
is installed for
SERIAL Port 2
. Refer to Section 2:
Installation for further information about the jumpers.
c. Use a voltmeter to read the +5 V output. PIN 1 of each
port should have +5 Vdc on it when the jumpers
mentioned above are installed.
d. Compare the +5 V readings from the status report and
voltmeter. The voltage difference should be less than 50
mV (0.05 V), and both readings should be within ±0.15
V of 5 V.
Serial
Communications
Step 1. Purpose: Verify the communications interface setup.
Method: Connect a computer terminal to
Ports 2
,
3
, or
4
of the
relay.
Communication Parameters: 2400 Baud, 8 Data Bits,
1 Stop Bit, N Parity
Cables: SEL C234A for 9-pin male computer connections
SEL C227A for 25-pin male computer connections
Step 2. Purpose: Apply control voltage to the relay, and start Access
Level 0 communications.
Method: Apply control voltage to the relay. The enable target
(
EN ) LED should illuminate. If not, be sure that power is
present. Type <Enter> from your terminal to get the
Access Level 0 response from the relay. The
=
prompt should
appear, indicating that you have established communications at
Access Level 0.
The ALARM relay should pull in, holding its b contacts open.
If the relays pull in but your terminal does not respond with the
equals sign, check the terminal configuration. If neither occurs,
turn off the power, and refer to
Relay Troubleshooting on
page 10.33 .
The
=
prompt indicates that communications with the relay are
at Access Level 0, the first of four possible levels. The only
command accepted at this level is
ACC <Enter> , which opens
communications on Access Level 1.
Step 3. Purpose: Establish Access Level 1 communications.
Method:
a. Type ACC <Enter> .
b. At the prompt, enter the Access Level 1 password and
press <Enter> . (See PAS (Passwords) on page 7.22 for
a table of factory default passwords.) The
=>
prompt
should appear, indicating that you have established
communications at Access Level 1.
NOTE:
If you are using a battery
simulator, be sure the simulator
voltage level is stabilized before
turning the relay on.