TM 9-6115-604-34
NAVFAC P-8-633-34
Figure 5-28. Test Setup, Reverse Power Relay K109
(c)
Note multimeter and ammeter indications. Multimeter across the NC terminal should deflect to
infinite ohms (contacts open) when ammeter reading reaches approximately 0.74 amperes. If not,
establish proper polarity by reversing connections across terminals 5 and 6 of the relay. Multimeter
should then read Infinite ohms (contacts open).
(d)
If relay contacts change state as described in step (c), above, bring variable 0-10 V ac power source
to zero. Multimeter will deflect to zero (contacts closed). Gradually increase input at relay terminals
5 and 6 while monitoring both the ammeter and multimeter readings. Multimeter should deflect to
infinite ohms (contacts open) when ammeter reading reaches approximately 0.74 amperes.
(3)
Adjust. If relay does not trip (open contacts) at 0.74 amperes, adjust the RAISE-LOWER pot on the relay
to increase or decrease relay threshold level. Repeat test step (d), above, until the desired 0.74 amperes
trip level is obtained.
(4)
Replace. If 0.74 amperes trip level adjustment cannot be made, replace the relay.
d.
Install. See Figure 5-9.
(1)
Install reverse power relay K109 (61) and secure with screw and captive washer assemblies (62).
(2)
Make wiring connections as tagged and discard wire tags.
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