By Hartmut Kiank
While making plans an commercial energy provide plant, the categorical standards of the person construction technique are decisive for the layout and mode of operation of the community and for the choice and layout and rankings of the operational gear. because the real technical hazards are usually hidden within the profound and complicated making plans activity, making plans judgements might be taken after dependable and cautious attention as a result of their deep results on offer caliber and effort efficiency.
This booklet is meant for engineers and technicians of the power undefined, business businesses and making plans departments. It offers easy technical community and plant wisdom on making plans, deploy and operation of trustworthy and fiscal business networks. furthermore, it enables education for college students and graduates during this field.
In a simple and understandable approach, this booklet informs approximately answer competency received in lots of years of expertise. additionally, it additionally bargains making plans concepts and data on criteria and standards, using which guarantees that technical hazards are shunned and that construction and business tactics should be conducted successfully, reliably and with the top quality.
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Extra resources for Planning guide for power distribution plants : design, implementation and operation of industrial networks
Example text
20]. This reference short-term flicker intensity must not be exceeded by interaction of all sources of disturbance in the power system. 7 1 2 4 7 10 20 40 70 100 200 400 700 1,000 Repetition rate r min -1 Fig. 12) kU unbalance factor of the voltage kU-perm permissible unbalance factor of the voltage The voltage unbalance caused by two-phase loads (line-to-line connection) and single-phase loads (line-to-neutral connection) is described by the unbalance factor kU . 12. 25) THD total harmonic distortion factor The total harmonic distortion factor is the ratio of the RMS value of the sum of all harmonic components up to a defined harmonic order H to the RMS value of the fundamental component.
8, the short-circuit withstand capability of the Protothen-X cable used (XLPE insulation, flame-retardant PVC sheath) must be verified. 5 sec I k" F1 14 . 4 kA ț F1 1 . 8 3 F1 I k" F2 150/1 A N2XSY 3x1x95 mm2 Ɛ = 150 m 1,200 A ț F2 1 . 4 kV S rT = 2,500 kVA u rZ = 6 % I thr = 16 · I rT = 1,155 A t thr = 2 sec F2 U nN 0 . 4 kV Fig. 8 Short-circuit-proof rating of a transformer feeder Using the values from Fig. 0 kA can be calculated. The MV cable of type N2XSY 3 × 1 × 95 mm2 used must withstand the effects of this thermal equivalent short-circuit current.
Urban industrial zones). In rural supply areas, further conditions apply to the connection of an industrial plant to the public medium-voltage network. If the short-circuit power of the network periphery is excessively low, fluctuating loads of the industrial plant can cause impermissible voltage fluctuations in the entire medium-voltage power system. Impermissible voltage fluctuations can only be avoided by increasing the short-circuit power of the system or by dynamic compensation equipment (DVR systems).