TRANSFORMER T103

Figure 15-8. Annunciator Control Assembly A20 (Sheet 2 of 2)

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 (g) Install annunciator (13) by securing brackets (12) using screws (10) and nuts (11). (h) Connect wires to terminal boards, then remove wire tags. 15-11. FLASHER FC1. The flasher (23, figure 15-3) is plugged into terminal block (22) which is mounted on the plate assembly (30) with two screws (20) and nuts (25). Test the flasher by connecting it in series with a 24V DC power source and test lamp. The test lamp should flash on and off; otherwise the flasher is defective and should be replaced. 15-12. TRANSFORMER T103 (29, figure 15-3). a. Remove phase shift transformer T103 as follows: (1) Tag and disconnect lead wires. (2) Remove screws (27) and nuts (28) and remove T103 (29). b. Test transformer T103 in accordance with procedures in paragraph 5-3 b. c. Install T103 as follows: (1) Secure transformer T103 to plate (30) using screws (27) and nuts (28). (2) Connect wires and remove tags. 15-13. RESISTOR R30 (14, figure 15-3). a. Remove R30 (14) from terminal block (19) by removing screws (17). b. Use an ohmmeter to test R30 for resistance of 39,000 ohms ±5 percent. Replace R30 if specified resistance value is not met. c. Install resistor R30 (14) onto terminal block (19) using screws (17). 15-14. DIODE CR36 (15, figure 15-3). a. Disconnect one end of the diode (15) by removing screw (17). b. Connect an ohmmeter (scale set at Rx100) across the diode, and note reading. c. Reverse ohmmeter leads to the diode, and again note reading. A good diode will read high resistance one way and low resistance the other way. A shorted diode will read full scale both ways. An open diode will read infinity (no reading, in either direction. d. Remove shorted or open diode (15) by removing remaining screw (17). e. Reconnect lead of good diode, or install new diode with screws (17). Section III. MAINTENANCE OF AUTOMATIC CONTROL MODULE 15-15. GENERAL. the Automatic Control Module can automatically control up to four generator sets by monitoring the utility bus voltage and frequency. If voltage should vary by ±10 percent or frequency should vary by ±3 percent the module will start the generators, open the utility breaker and sequentially load generators. The troubleshooting procedure contained in Table 5-5 and 5-6 of the Operator and Organizational Maintenance manual isolates most faults that may occur. Test and adjustment procedures are contained in this section. 15-16. UNDER/OVERVOLTAGE DEVICE. There is one under/over voltage device. The device is preset for a ±10 percent deviation in the 120V AC bus sensing power. The device is adjustable within the range specified in the tabulated data in Chapter 1 of the Operator and Organizational Maintenance manual. Trip settings are made by removing protective plastic caps on front of the device and turning adjustment screws beneath caps. A clockwise rotation of adjustment screw will increase trip point. Figure 15-9 shows component layout of Automatic Control Module. 15-12

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