Asynchronous (Induction) Motor Data – IEC 60909
IEC 60909 provides data for asynchronous motors commonly called as induction motors. Table 4 – IEC 60909-0 Table 3 – IEC 60909-1 Clause 4.7 – IEC 60909-0 Equation 26 – …
Voltage Levels – IEC 61000-3-6
The following table provides the different voltage levels as per IEC. It is good to note that [1] is the only IEC standard that mentions about Medium voltage. All other …
Cable Rating Reduction Factor due to Harmonic Currents
The presence of harmonic current in a power system increases the current in the neutral conductor due to phase current imbalance (refer to Fig. 1b). To ascertain that the current-carrying …
IEC 61439 – Relationship between peak current and short-time current
Short-circuit withstand ratings of a switchboard or motor control centre is a measure of its ability to withstand the dynamic and thermal stresses when a fault occurs within or near …