Cyclic loading in accordance with IEC 60354
IEC 354 may also be used to give indication of permissible daily loading cycles. Loading patterns are deemed to consist of a simplified daily cycle having the form shown in Fig. 6.131, above. Symbols used in the guide have the following meanings:
K1 is the initial load power as a fraction of rated power
K2 is the permissible load power as a fraction of rated power (usually greater than unity)
t is the duration of K2, in hours
θA is the temperature of cooling medium, air or water
where S1 is the initial load power
S2 is the permissible load power and
Sr is the rated power
The values of K1, K2 and ...
Get J & P Transformer Book, 13th Edition now with the O’Reilly learning platform.
O’Reilly members experience books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers.
