FFXI Haven - #1.
(b)Interpretation. Blowing of the fuse indicates a short-circuited capacitor. Absence of current indicates an op en-circuited capacitor. Good capacitors should have current readings of 100 to 115 percent of rated value, with the case and internal temperature at 25 degrees C. Current readings above 115 percent of rated current may indicate an internal short or the presence of harmonics in the test voltage. If waveform of the test voltage is suspect, the test should be repeated using an alternate source of electric power. (2)Terminal-to-case insulation test. The purpose of this test is to determine the adequacy of the insulation to ground of a given capacitor unit. This test may be applied to two bushing, single-phase capacitor units, but not to capacitor units where the case is used as a terminal. (a) Procedure. With the capacitor unit insulated from ground, apply a voltage equal to twice rated voltage between case and terminals (all terminals connected together) in accordance with figure 13-2. Voltage should be applied for one minute, with the test circuit fused and containing sufficient impedance to limit the current, should the capacitor under test be shorted. r------SWITCH OR \ CIRCUIT BREAKER POWER SOURCE RATED VOLTAGE AN0 FREQUENCY CAPACITOR UNIT Figure 13-1. Easy Access To All Pages 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 |
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