TM 9-6115-604-34NAVFAC P-8-633-34Figure 5-28. Test Setup, Reverse Power Relay K109(c)Note multimeter and ammeter indications. Multimeter across the NC terminal should deflect toinfinite 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. Multimetershould 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 sourceto zero. Multimeter will deflect to zero (contacts closed). Gradually increase input at relay terminals5 and 6 while monitoring both the ammeter and multimeter readings. Multimeter should deflect toinfinite 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 relayto increase or decrease relay threshold level. Repeat test step (d), above, until the desired 0.74 amperestrip 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.5-71
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