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a. Block Systems Only
Change the STYP setting to BLK. Apply a for-
ward fault, as shown in the Non-Pilot Mainte-
nance Test, step 5. The relay should not trip.
Apply a rated dc voltage to PLT ENA terminals
TB 5/9(+) and TB 5/10(-). Repeat the test. The re-
lay should trip.
b. POTT/PUTT Systems Only
Change the STYP setting to POTT. Change the
LED mode to TEST and select the function
"RS1". Push the ENTER button; the LED should
be "ON". Apply a forward fault as shown in Non-
Pilot Maintenance test, Step 5. With the ENTER
button depressed, the relay should not trip. Apply
a rated dc voltage to terminals TB 5/9(+) and TB
5/10(-). Repeat the test. The relay should trip.
Step 3.
Receivers 1 and 2
Apply a dc voltage to PLT ENA terminals TB 5/
9(+) and TB5/10(-).
a. Block Systems Only
Change the STYP setting to BLK. Apply a for-
ward fault as shown in the Non-Pilot Mainte-
nance test, Step 5. The relay should trip.
Apply a rated dc voltage to RCVR #1 terminals
TB 5/7 (+) and TB 5/8(-). Repeat the test. The re-
lay should not trip. Move the dc voltage from
RCVR #1 to RCVR #2 terminals TB 5/11(+) and
TB 5/12(-), and repeat this test for RCVR #2.
b. POTT/PUTT Systems Only
Change the STYP setting to POTT. Apply a for-
ward fault as shown in the Non-Pilot Mainte-
nance test, Step 5. The relay should not trip.
Apply a rated dc voltage to RCVR #1 terminals
TB 5/7(+) and TB 5/8(-). Repeat the test. The re-
lay should trip.
Move the dc voltage from RCVR #1 to RCVR #2
terminals TB 5/11(+) and TB 5/12(-), and repeat
this test for RCVR #2.
(5/92)
2.3
Single-Pole Trip Test
2.3.1
Output Contact Test (Phases B and C)
Step 1.
Set relay for Non-Pilot systems (Table 6-
1) or for Pilot systems (Table 6-3). Check the 62T
setting; it should be 5.000.
For a Pilot system, change the PLT setting to
YES, and apply rated dc voltage to Pilot enable
terminals TB 5/9(+) and TB 5/10(-). Also, apply a
rated voltage to RCVR #1 terminals TB 5/7(+)
and TB 5/8(-) if the STYP = POTT or PUTT; set
TTYP = SPR.
Step 2.
Repeat Non-Pilot Maintenance test, step
5 for trip and BFI. Check the contact closures for
Trip A, Trip B, Trip C and BFIA, BFIB, BFIC.
2.3.2
Input Opto-Coupler Check
Step 3.
52a Terminals
Apply a rated voltage to 52b terminals TB 5/3(+)
and TB 5/4(-) and then apply a rated voltage to
52a terminals TB 5/1(+) and TB 5/2(-). The relay
should trip in 5 seconds with a display of 62T.
NOTE:
When using sophisticated
automated test equipment, to test
MDAR, it should be noted that
some conditions can be simulated
that are not realistic. For instance,
the equipment has the ability to
remove three-phase voltage
instantaneously. This can cause
erroneous test results.
For example, if a Zone 2 fault is
applied to MDAR but removed,
before the Zone 2 trip decision, by
instantaneous removal of voltage
and current, MDA may trip. This is
due to the total voltage collapse
occurring while MDA is in the fault
mode. This does not represent a
true power system condition since
the voltage and current cannot
become zero instantaneously.
I.L. 40-385.1B
6-13
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