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Page 386

| Battery, storage (cont.) |

| cell voltage, 296-97 |

| charger, 299-301 |

| charging, 296-97, 301 |

| construction, 290-93 |

| container, 293 |

| control system, 283 |

| Edison, 285 |

| electrolyte, 284-87, 289-91, 293-96, 299-300 |

| equalizing charge, 301, 303 |

| function, 294 |

| gases, 286, 298 |

| inspection, 300 |

| Iron Clad plate construction, 290-91 |

| lead, 284-87, 290-91, 295-97, 299-300 |

| lead, sulphuric acid, 284 |

| maintenance, 299-301 |

| nickel-iron alkaline, 284, 288 |

| nickel-cadmium, nicad, 289, 292 |

| operation, 294-98 |

| operation, principle of, 284 |

| plates, 290-94 |

| rating, 294 |

| rectifier, 297-99, 301 |

| separator, 291, 293 |

| specific gravity, 294-96, 300-301 |

| Bayonet contact, 142 |

| Bell ringing transformer, 71, 103 |

| Blades, switch, 188 |

| Boost, transformer connection, 86, 91-96 |

| Boric acid fuse, 206-7, 213 |

| Bracing, 60 |

| Breakdown, transformer, 38 |

| Breaker, circuit (see Circuit breaker) |

| Breaker travel indicator, 171-72 |

| Brush contact, 141 |

| Buck, transformer connection, 86, 91-96 |

| Bucket truck, 46 |

| Burden, instrument transformer, 95-97 |

| Bus, 49, 51 |

| Bushings, 22, 34-38, 58-59, 61, 71-73, 81, 121, 148-51, 167 |

| condenser type, 149-50 |

| electrostatic stress, 149 |

| maintenance, 167 |

| oil filled, 149 |

| porcelain, 148 |

| sulphur hexafluoride, 150 |

| Butt contact, 139 |

| C.. |

| Cable, 48-49 |

| Capacitance, 11-13, 305 |

| Capacitive reactance, 11-13 |

| Capacitor, 35, 119, 305, 308-13 |

| bushing, 149-50 |

| construction, 309-10 |

| dielectric absorption, 313 |

| function, 308 |

| insulation, 309 |

| maintenance, 313 |

| operation, 310-11 |

| operation, principle of, 309 |

| safety interlock, 313 |

| Capacitor, tripping relay, 254 |

| Capacity, (see Rating, Transformer) |

| Carrier pilot relaying, 271-72 |

| Cell, battery, 294-97 (see also Battery, storage) |

| Cerchi, Italy, 3 |

| Charger, battery, 299-301 |

| Circuit, 8, 11-14, 16, 20, 72-73 |

| Circuit, Keep Alive, 315 |

| Circuit breaker, 49, 58, 129-56, 157-77, 235 |

| air circuit type, 133-34, 146 |

| anti-pump feature, 157-58 |

| arc control, 143-46 |

| arc quencher, 165 |

| automatic reclosing feature, 158-59 |

| bushings (see Bushings) |

| construction, 138 |

| contacts, 138-42, 148, 165-66 |

| control, 157-59 |

| control indicator, 164 |

| current, unlimited, 129-30 |

| current limiting method, external, 146 |

| de-ion arc quencher, 142-45 |

| electrically operated mechanisms, 160-63 |

| explosion chamber, 142 |

| function, 129 |

| grounds, 155 |

| indoor type, 152 |

| insulation coordination, 150-51 |

| insulation requirements, 146, 150-51 |

| interrupting duty, 129-31 |

| lift rod, 147 |

| magnetic fields, 129-31 |

| maintenance, 154-57 |

| mechanical stresses, 146 |

| metal clad switchgear, 152-53 |

| modules, 136-37 |

| motor operated mechanism, 161-62 |

| oil, circuit breaker type, 134-35 |

| oil maintenance, 164-67 |

| oil, properties, 148 |

| oil, test for, 61-62, 121 |

| oil, circuit recloser, 154-55 |

| operation, principle of, 132 |

| operation methods, 159-64 |

| outdoor types, 152 |

| pneumatically operated mechanism, 162-64 |

| protective relays, 235 |

| rating, 131-32 |

| remote mechanisms, 159-60 |

| short circuits, 130-31 |

| single pole, 152 |

| solenoid operated mechanisms, 161 |

| station types, 152 |

| sulphur hexafluoride types, 136-37, 171-73 |

| tanks for contact elements, 138, 146 |

| three pole, 146-47 |

| tripfree feature, 157 |

| types of circuit breakers, 133-37, 152-55 |

| vacuum type, 135, 171-73 |

| Circuit recloser, 154-55 |

| oil type, 154-55 |

| trip sequence, 155 |

| Clamp-on meters, 347-48, 353 |

| Clamps, 192 |

| Clearance, 43, 46 |

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