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K - Testing Generator Rotor Stop engine and PTO unit. Disconnect leads to engine starting battery, negative (-) lead first. LaWAR"i;l Accidental starting of the generator can cause severe personal injury or death. Disconnect &e pmpulsion engine bafterycables, negative (-) lead firsf, before continuing with these test procedure, For these tests, use a megger or insulation resistance meter which applies500 VDC or more to the test leads. Testing for Grounds: Check for grounds between each rotor lead and the rotor shaft, Fig- ure 8. Perfom tests as follows: 1. Remove rotor leads F1+ and F2- from the rotating rectifier assemblies. 2. Connect test leads between F1+ and rotor shaft. Meter should register 100,000 ohms or greater. 3. If less than 100,OOO ohms, rotor is ques- tionable. Thoroughly dry the rotor and re- test. 4. Replace a grounded rotorwith a new identical part. Testing for Opn or Shorted Windings: Per- form tests as follows: 1. Remove rotor leads F1-t and F2- from rotating rectifier assemblies. 2. Using ohmmeter, check resistance between Fl and F2 leads, Figure 9. The resistance values at 77" F (25" C) should be as shown in Table 2. If not, replace defective rotor with new, identical part. TABLE 2. ROTOR RESISTANCE VALUES IN OHMS, k 10% kW RATING RESISTANCE (ohms) 1 6/20 I 20124 24130 I 2.24 I ~ 2.91 I 30135 ~ INSULATION ~ MEGGER OR RESISTANCE MElER TESTING WINDING . FOR GROUNDS CA-lOlO-12S FIGURE 8. TESTING ROTOR FOR GROUNDS TESTING WINDING RESISTANCE (7-7 DIGITAL r -1 I CA1QIO.S FIGURE 9. TESTING ROTOR FOR AN OPEN CIRCUIT
L - Wiring Harness Check Stop engine and Pi0 unit. Disconnect leads to engine starting battery, negative (-) lead first. -1 Accidental starting of fhe generator can cause severe personal injury or death. Disconnect the propulsion engine bafieryc&les, negative (-1 lead first, before continuing with these iesi procedure. Carefully check wiring harnesses as follows: 1. Inspect all wires for breaks, loose connections, and reversed connections. Refer to the wiring diagrams at the end of this sup- plement. 2. Remove wires from terminals at each end and using an ohmmeter, check each wire end to end for continuity or opens. 3. Using an ohmmeter, check each wire against each of the other wires and to ground for possible shorts or insulation breaks under areas covered by wrapping material. 4. Reconnect or replace wires according to the wiring diagrams at the end of this sup- plement. M - Voltage Adjustment When checking output voltage, be sure that the generator has stabilized and is running at the correct speed (frequency). Accidental starting of ihe generafor can cause severe personal injury or death, Dlsconnecf fhe propulsion engine baffery cables, negative (-) lead first, before connecting test leads to the controls or generator. . 12 -1 Contacf wifh high voltage can cause severe personal injury or death. Do not touch any exposed wiring or compo- nenfs with any part of the bod% clothing, tool or jewelry. Do nof use non-insulated tools inside the control. Sfand on an insu- laiing mat or dry wood plaffonn when the control doors are open. With the generator running, set the voltage adjust potentiometer on the regulator board assembly for correct voltage. See Figure 10. I I 0 0 VOLTAGE ADJUST I FIGURE 10. VOLTAGE REGULATOR BOARD N - Reconnection INSIDE CONTROL BOX Generator reconnection conforms to AC wiring diagram 612-6678, supplied in this supple- ment. Also see the Installation Manual for output connection and generator reconnection guidelines.
Page 1 and 2: Caution: This document contains mix
Page 3 and 4: The following symbols in this manua
Page 5 and 6: FLOW CHART A. NO AC OUTPUT VOLTAGE
Page 7 and 8: STMT Check exciter stator winding p
Page 9 and 10: -1 Contact with high voltage can ca
Page 11 and 12: The preferred test is with a megger
Page 13: are given in Table 1 (lead length b
Page 17: T I I I I I I I - I I I I I I I I I
Page 21 and 22: GENERAL This manual contains troubl
Page 23 and 24: generator adapter. The brushless ex
Page 25 and 26: Is control panel field breaker CB21
Page 27 and 28: FLOW CHART D. AC OUTPUT VOLTAGE BUI
Page 29 and 30: GENERAL All of the following Adjust
Page 31 and 32: . FIGURE 6. MSHlNGTHEFiELD voltage
Page 33 and 34: MULTIMETER FIGURE 11. SCR VOLTAGE T
Page 35 and 36: TABLE 2 RESISTANCE VALUES FOR ROTOR
Page 37 and 38: VOLTAGE REGULATOR The line-voltage
Page 39 and 40: VI v2 v3 v4 - VI v2 v4 VI v2 \R v4
Page 41 and 42: START Is control panel field breake
Page 43 and 44: . FLOW CHART D. EXCITER FIELD BREAK
Page 45 and 46: GENERAL All of the following Adjust
Page 47 and 48: The winding schematic (Figure 25) s
Page 49 and 50: CONTACT ONE PROD TO EACE OF M E FIE
Page 51 and 52: [a1 RECONNECTION WIRE W12 Figure 36
Page 53 and 54: 1201240 VOLT, 1 PHASE, 60 HERTZ NAM
Page 55 and 56: ASSEMBLY 9. Torque down rotor-throu
Page 57 and 58: . Starting Watts ..................
Page 59 and 60: WIRING CONNECTIONS, 15-25 kW SINGLE
Page 61 and 62: PERIODIC SERVICE AND INSPECTION SER
Page 63 and 64: I I I I CYRZI-2 I 7821-1 I - I t I
Page 65 and 66:
NOTE: For detailed troubleshooting
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3. Removesix5/16x l-inch capscrewsa
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4. Remove end bell by tapping upwar
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9. Remove rotor and fan .by using a
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14. If bearing, shaft, or oil seal
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AC .AMMETERS WATER TEMPERATURE GAU
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ENGINE CONTROL SYST.EM OPERATION De
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Umlt cranking 15 to 20reconds to co
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RADIATOR-COOLED DIESEL SETS The con
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Start-Disconnect Sequence When cran
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a a W a 9 W z f 66 6 b w a 3 0 E
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START Does fuel transfer pump El an
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CONTROL COMPONENT CHECKOUT The foll
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WIRING DIAGRAMS The wiring and sche
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I I I L I I m 74
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I 1 ' t I I U
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IW I- CE o_ u) z I It I 3 w
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I I I I I I I I 3 $1 :I a 1 I I tl
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P 83
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- --1 I" .- I . I - 1 85
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87 ~ " - .I \ e 6 a i- z 0 0 a E a
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I I I I I I I I I 7 6 Et 4 3 2 I RE
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Onan Corporation 1400 73rd Avenue N
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Caution: This document contains mixed page sizes ... - Igor Chudov

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