Replacement - TM-5-6115-593-34

Figure 15-12. Time Delay Relay, Test Setup

TM-5-6115-593-34 Generator Set Diesel Engine Driven Tactical Skid Mtd. 600 Kw 3 Phase 4 Wire 120/208 and 240/416 Volts Manual
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TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 instantly on LR relays, by verifying ohmmeter indication. (3) Check that normally open contacts close and normally closed contacts open after a time delay of . 2-20 seconds on LRTD relays. The LRTD relays are adjustable from . 2-20 seconds. NOTE The LRTD relays are designed for horizontal mounting. When testing, it must be placed in this position to operate properly. b. Replacement. Relays (15, 13, figure 15-9) are removed and replaced as follows: (1) Disconnect and tag wires to relays. (2) Remove two screws and two washers. Remove relay from panel (7). (3) Replace relay (15) by attaching to panel (7) using two screws and washers. Connect wires and remove tags. 15-22. TIME DELAY RELAY. (SDT) (12, figure 15-9) is a delay on a drop-out type relay set for 5 minute delay. The relay is adjustable within 1-300 seconds and allows the engines to cool down after load has been removed. a. Test. (1) Connect a 24V DC supply to L1(-) and L2(+) as shown in figure 15-15. (2) With ohmmeter across terminals 5 and 3 note that resistance reading does not change until 5 minutes after power has been applied. b. Replacement. Remove and replace time delay relay (12) as follows: (1) Disconnect and tag wires connected to relay. (2) Remove four screws and washers. Remove relay from panel (7). (3) Replace relay (12) by attaching to panel (7) with four screws and washers. Connect wires and remove tags. 15-23. TIME DELAY RELAY. (UTR) (17, figure 15-9) is a time delay on energize type relay set for 5 minutes delay. The relay is adjustable within 3-30 minutes and prohibits load to be transferred back to utility power until timed out. a. Test. (1) Connect the relay as shown in figure 15- 12. (2) Close switch S1. The lamp DS1 will not light until the relay has timed out (5 minutes). b. Replacement. Remove and replace relay (17) as follows: (1) Disconnect and tag wires to relay. (2) Remove four screws and washers. Remove relay from panel (7). (3) Replace relay (17) by attaching to panel (7) with four screws and washers. Connect wires and remove tags. 15-18

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