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The tests should include all alarms (including control alarms), switches, and the manufacturer's recommendations.
d.Internal inspection guidelines specific to the insulating medium used. The insulating medium must be removed, as necessary, to examine the circuit breaker internally.
(1) Oil-insulated circuit breakers. Inspecting the tank includes removing the oil, ventilating the
TM 5-684/NAVFAC MO-200/AFJMAN 32-1082
tank, visually inspecting the interior, and wiping down the tank and interior parts.
(a)Maintenance of the integral parts (contacts, interrupter assemblies, internal current transformers, resistors, capacitors, and lift rods) includes checking, measuring, adjusting, aligning, and making repairs as needed. Lubricate all parts and components that are required to be lubricated. Replace any seals and gaskets, if necessary. Replace all desiccant materials, if applicable.
(b)Reseal the tank after inspection and maintenance.
(c)Refill the tank to the proper oil level and inspect for leaks.
(2) Circuit breakers insulated with SF6gas. Remove SF, gas from the circuit breaker; transfer the gas from the circuit breaker (use a gas processing unit); pull a vacuum on the circuit breaker to be certain that all of the gas has been removed; and release the vacuum on the circuit breaker with dry air or nitrogen to avoid pulling moisture into the tanks.
(a)Inspecting the tank includes opening the tank, vacuuming any residue (if present), ventilating, and wiping the inside of the tank with approved solvent.
(b)Inspect all parts for wear and damage, including the fiberglass components and seals.
(c)Install factory-recommended overhaul and sealer kits. BACK | NEXT 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
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