Step 1: Collecting all the project data 1.4 Electrical circuits and consumers Outgoing circuits in a switchgear assembly can be distinguished into distribution circuits (protective device and incoming cable to downstream distribution) and fi nal circuits (protection device and incoming cable and consumers). For a correct rating of the circuits, all information regarding the expected power demand and consumers must be known. Therefore, the technical data of the device manufacturer with information on derating, but also the rated current of a circuit and the rated diversity factor RDF must be considered. 4. Electrical circuits and consumers Connection outgoing:
from top from bottom from left from right _______________ connected to device via terminal block cross section (mmІ):
_______________ 13 Equipped with Quan- tity Type of protective device (fuse, circuit breakers, ...) Rated values of the consumer (current, power, ...) Comments Consumer Consumer Consumer Consumer Consumer Outgoing cable connection Type of outgoing cable Type of cable Type of connection Equipping Type of protective device Fuse, miniature circuit breaker, circuit breaker For detailed information about - Rating of an outgoing circuit (I ) Page 23 nC - Determination of the operating current (I ) Page 24 B - Calculation of the power dissipation (P ) Page 25 V - Creating the design verifi cation of the permissible temperature rise according to IEC 61439-1 / EN 61439-1 Section 10.10.
Page 26 Rating data of the consumer Current Power Type (ohmic, inductive or capacitive load) cos