TM 9-6115-604-34NAVFAC P-8-633-34(2)Test.(a)Turn on variable voltage source connected at terminals 1, 2, and 3 of K111 and set for an outputvoltage of 240 V ac as reflected on the voltmeter. Monitor multimeter at terminals 4 and 6 of therelay. Multimeter should read zero ohms.(b)Gradually decrease voltage input into the relay by turning down the variable voltage source. Therelay should trip when voltage from the variable voltage source decreases to 166 5 V ac asindicated on the voltmeter. Multimeter should read infinite ohms at this point, showing that the relaycontacts have changed state. Record voltmeter reading.(c)Turn off the variable voltage source with its output level set at the trip voltage recorded in step (b)above. After 10 seconds, turn variable voltage source back on while timing relay trip time with astopwatch. Multimeter at this point should deflect to zero ohms. Relay should trip within 1 1/21seconds as indicated by the multimeter deflecting back to infinite ohms.(3)Adjust(a)If relay does not trip at specified voltage (166 i5 V ac), turn the trip voltage adjustment at upper left of therelay clockwise or counterclockwise to either increase or decrease the undervoltage threshold level.Repeat step (2)(b), above, and continue adjusting until the desired 166 ±5 V ac trip point is obtained.(b)If relay does not trip within the specified 1 1/21 seconds time delay, turn the time delay adjustment pot atupper right of relay clockwise or counterclockwise to either increase or decrease the relay's time delaysetting. Repeat step (2)(c), above, and continue adjusting until the specified 1 1/2±1 seconds time delay isattained.(4)Replace. If the specified undervoltage threshold and/or time delay period cannot be attained through therelay adjustment pots, replace the undervoltage relay.d.Install. See Figure 5-9.(1)Install undervoltage relay K1 (64) and secure with screw and captive washer assemblies (62).(2)Make wiring connections as tagged and discard tags.5-36. OVERCURRENT RELAY K114 (65, Figure 5-9).a.Inspect.(1)Inspect for overall cleanliness and damage.(2)Ensure that plexiglass faceplate is clean, intact, and securely fastened by the three captive screws.(3)Ensure that all electrical wiring and mounting connections are secure.b.Remove. See Figure 5-9.(1)Tag and disconnect wiring from overcurrent relay K114 (65).(2)Remove four screws (66) from rear of panel and carefully slide overcurrent relay K114 (65) free from frontof panel.c.Test. See Figure 5-30.(1)Preparation for bench test.(a)Remove overcurrent relay in accordance with step b, above.(b)Obtain a 24 V dc power source, a 24 V, 0-15 ampere ac power source, a dc voltmeter, and an acammeter.(c)Connect the positive lead of the 24 V dc power source to terminal 7 of relay K114 and the negativelead to terminal 8 of relay K114. Install the dc voltmeter across terminal 12 of relay K114 and thenegative lead of the 24 V dc power source. Connect the 24 V, 0-15 ampere ac power source acrossterminals 5 and 6 of relay K114. Install the ac ammeter in series between the 24 V, 0-15 ampere acpower source and terminal 6 of relay K114.5-74
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