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Electrical installation engineering for power supply
Installation specifications 1399
Electrical installations engineering for special
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according to VDE assembly Type breaking current busbars cable capacitors circuit breaker Type closed conductor connection construction contactor cross-sectional area cubicle current rating current transformers current-limiting dimensions disconnectors discrimination distribution boards distribution system earth fault earthing switch electrical enclosure equipment items example factor Fault location F2 grading h.r.c. fuses high-voltage Impedances of equipment indication inductive reactance infeed Initial symmetrical short-circuit installation insulation isolating distance line-to-earth load Maximum asymmetrical short-circuit motor opening operating mechanism operating voltage outgoing feeder overcurrent releases overhead lines overload positive-sequence primary current protective devices r.m.s. value rated current rated impedance voltage rated power rated primary rated secondary current rated short-circuit breaking rated voltage ratio relay release characteristic resin-cast transformers ring feeder short-circuit breaking capacity short-circuit current path Siemens subsidiary substations supply switch-disconnector switchboard sections switchgear symmetrical short-circuit current Table temperature terminal thermal three-phase vector group voltage transformers withstand voltage