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60950中:2.5 Limited power sources% V. m% [* K7 f8 z# @% d
A limited power source shall comply with one of the following, a), b, c) or d):
3 K' Z& v/ k) {$ N5 |# ea) the output is inherently limited in compliance with Table 2B; or
5 X' o, C" ~$ S& D0 Q5 \$ T5 n' Sb) a linear or non-linear impedance limits the output in compliance with Table 2B. If a* m8 ?& p( n4 b8 o& {0 F
positive temperature coefficient device is used, it shall pass the tests specified in IEC
7 g" V, S: k7 p- m- ?60730-1, Clauses 15, 17, J.15 and J.17; or. c( R+ d1 N: Y0 _+ }
c) a regulating network limits the output in compliance with Table 2B, both with and- c3 U* ?% a7 h
without a simulated single fault (see 1.4.14) in the regulating network (open circuit or* g: ]3 E. o! ]% y6 @+ [. y
short-circuit); or b( N# T" j3 @5 b
d) an overcurrent protective device is used and the output is limited in compliance1 l6 G0 Q& X3 J/ C
with Table 2C. |
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