Figure 5-6. Relay K23, Test Setup

Figure 5-7. Overvoltage Relay K102, 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
Page Navigation
76

TM5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 Figure 5-6. Relay K23, Test Setup relay. Set the frequency at 50 Hz and increase the voltage to 156 volts. DS1 shall extinguish and DS2 shall light. Repeat for the same voltage. NOTE Disconnect relay from test setup. (g) Using an ohmmeter, set on high scale, connect one lead to the relay case and the other lead to relay terminals one at a time. Meter should read no continuity. Similarly, connect ohmmeter between terminal 1 and 3, 4, 5, and terminal 1 and 6, 7, 8. There should be no meter reading. (2) Replacement. Remove (69, figure 5-1, sheet 2) by disconnecting and tagging wires and removing four screws (68) c. Phase Sequence Relays K103 (60, Figure 5-1). (1) Test. To test relays K103, connect as shown in test setup, figure 5-8. This relay operates on 190-520 volt, 3-phase, 60 Hz. When incorrect phase sequence A, C, B (figure 5-8), is applied the relay will energize until power is removed. Ohmmeter connected to terminals 4 and 5 will indicate continuity at this point until the correct phase sequence is applied, then an open circuit will appear at terminals 4 and 5. (2) Replacement. Remove relay (60, figure 5-1, sheet 2) by disconnecting and tagging wires and removing four screws (59). d. Sync Check Relay K106 (82 Figure 5-1). (1) Test. To test relay K106, connect as shown in test setup, figure 5-9. Two separate 115V AC sources are required: (1) a fixed frequency 115V AC 50/60 HZ source, and (2) a variable frequency 115V AC source. Two lamps connected in parallel across the two sources are also required. When the lamps turn off together, the 115V AC sources are synchronized. The ohmmeter must show continuity, indicating that the relay contacts are closed. Perform this test at both 50 and 60 HZ frequencies. If lights fail to turn off together while variable frequency source is within tolerance (47.5 to 52.5 Hz for 50 Hz test, 57.5 to 62.5 Hz for 60 Hz test), K106 is defective and must be replaced. (2) Replacement. Remove relay (82 figure 5-1, sheet 2) by disconnecting and tagging wires and removing four screws (81). e. Undervoltage Relay K111 (78, figure 5-1). (1) Test. To test undervoltage relay K111, connect relay as shown in test setup figure 5- 10. 5-9

Privacy Statement
Press Release
Contact