Schweitzer Engineering SEL-387-0, Instruction Manual, Page: 411 / 556

10.31
Date Code 20170601 Instruction Manual SEL-387-0, -5, -6 Relay
Testing and Troubleshooting
Acceptance Testing
Step 1. Start with all settings at the default values, verify or change to
the values listed below:
a. Configure an external contact wired to
IN101
such that
IN101
is asserted (contact closed) to simulate a “de-
energized” power transformer prior to the start of the
test. This contact must be configured to open (power
transformer “energized”) at the instant when the test is
started (current is applied), and to stay open while the
test is in progress.
b. Use the SET R command to configure the sequential
events recorder SER1 trigger conditions to:
SER1 = IN101,TO1,TO2,HS1,HS2,FAA1,FAA2
The sequential events recorder in the relay will be used
to establish the time for the TO1, TO2, HS1, HS2,
FAA1, and FAA2 bits to assert.
Step 2. Initialize the thermal element.
a. With the relay turned on and the contact wired to IN101
closed, issue the THE R command to initialize the
thermal element.
Step 3. Start the test.
a. Simultaneously open the contact wired to IN101 and
apply (1.2 * I
N
) amps to IAW1 (Z01–Z02). The test
starts, t = 0, when input
IN101
is deasserted (external
contact opens). The expected operating times (in
minutes) from t = 0 are:
TO1 = 10
TO2 = 12
HS1 = 14
HS2 = 17
FAA1 = 19
FAA2 = 22
Acceptable values are ±1 minute of the above times.
The following is a typical SER report for this test.
Setting Value Setting Value
CTR1 = 1000/IN VWDG1 = 100
W1CT = Y
ETHER = Y
TMWDG = 1 VWDG = 100
XTYPE = 3 TRTYPE = Y
THwr = 65 NCS = 1
MCS11 = 100 DTMP = 40
TRDE = IN101 NTHM = 0
TOT1 = 50 TOT2 = 51
HST1 = 130 HST2 = 135
FAAL1 = 15 FAAL2 = 20
EDFTC = Y