Caution: This document contains mixed page sizes ... - Igor Chudov

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FLOW CHART E. UNBALANCED GENERATOR OUTPUT VOLTAGE START Remove load at generator terminals. Is output Check for correct grounding of generator still unbalanced? and load. Yes I . I I 1 I tno-l I Are generator leads connected and grounded properly? See Figure 36, <strong>page</strong> 34. Correct as necessary. I I t I Is generator stator winding continuous per TEST [K]? Check load for ground faults and correct as necessary. 25 Replace stator assembly.
GENERAL All of the following Adjustments and Tests can be performed without disassembly of the generator. They should be used for testing generator and regu- tator components in conjunction with the troubleshooting flow charts. TESTCNG AC RESIDUAL VOLTAGE . Generator residual AC voltage should be checked first if there is no AC power output. A quick place to check is at TBzl across terminals 62 and 63 (see Figure 20). Residual voltage should be 5-10 VAC. If none, flash field pet Test [D]. if residual voltage is present at TB21, then check circuit breaker CB21. If CB21 is OK, proceed to VR21 PC board and check for residual voltage between connector numbers 11 & 12,1& 2, and 9 & 10. If none, check continuity between these points with the gen set shut down. If voltage is low, check L21 reactor (Test [B] and T21 transformer (Test [E]). TESTING. L2f REACTOR The t21 eommutating reactor (Figure 21) mounts inside the control box The coils 1-2 and 3-4 are wound on the same core. Resistance between 1-2 and 3-4 should be .031 to ,037and .037to .046 ohms respectivelyat 77OF (25'). Resistance between coils and from any terminal to frame of the reactor should be infinity. rc1 TESTING RECTIFIER BRIDGE ASSEMBLY (CR21) The rectifier bridge located within the control cabi- net, <strong>contains</strong> 3 diodes, CR1, CR2 and CR3, and two silicon controlled rectifiers, SCRl and SCR2. The components are encapsulated within a hermetically sealed block, therefore failure of any diode'or SCR means the entire unit has to be replaced. See Figure 22. ADJUSTMENTS AND TESTS (YD GENERATORS USING UR TYPE REGULATORS) 26 FIGURE 21. L21 REACTOR AC TERMINALS ARE GIVEN NUMERIC ' DESIGNATIONS FOR Tf3T REFERENCE ONLY. DOES NOT v APPEAR ON UNIT. I CRI I C) FIGURE 22 RECTIFIER BRIDGE ASSEMBLY Disconnect wires from rectifier unit prior to testing. Test unit in order shown in Table 5. Refer to Figure 23 for SCR1 and SCR2 test circuit. When test is com- plete and satisfactory, reconnect unit observing correct wiring hook-up.
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 and 14: are given in Table 1 (lead length b
Page 15 and 16: L - Wiring Harness Check Stop engin
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: . FLOW CHART D. EXCITER FIELD BREAK
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
Page 67 and 68: 3. Removesix5/16x l-inch capscrewsa
Page 69 and 70: 4. Remove end bell by tapping upwar
Page 71 and 72: 9. Remove rotor and fan .by using a
Page 73 and 74: 14. If bearing, shaft, or oil seal
Page 75 and 76: AC .AMMETERS WATER TEMPERATURE GAU
Page 77 and 78: ENGINE CONTROL SYST.EM OPERATION De
Page 79 and 80: Umlt cranking 15 to 20reconds to co
Page 81 and 82: RADIATOR-COOLED DIESEL SETS The con
Page 83 and 84: Start-Disconnect Sequence When cran
Page 85 and 86: a a W a 9 W z f 66 6 b w a 3 0 E
Page 87 and 88: START Does fuel transfer pump El an
Page 89 and 90: CONTROL COMPONENT CHECKOUT The foll
Page 91 and 92: WIRING DIAGRAMS The wiring and sche
Page 93 and 94: I I I L I I m 74
Page 95 and 96:
I 1 ' t I I U
Page 97:
IW I- CE o_ u) z I It I 3 w
Page 100 and 101:
I I I I I I I I 3 $1 :I a 1 I I tl
Page 102 and 103:
P 83
Page 104 and 105:
- --1 I" .- I . I - 1 85
Page 106 and 107:
87 ~ " - .I \ e 6 a i- z 0 0 a E a
Page 108 and 109:
I I I I I I I I I 7 6 Et 4 3 2 I RE
Page 111:
Onan Corporation 1400 73rd Avenue N
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Caution: This document contains mixed page sizes ... - Igor Chudov

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