Short circuit and overload protection / m6 l; F; A9 V' U
15.3.23 I% k) J0 m: x. `
61558-1(ed.1);am1 & 61558-1(ed.2);am1& _' r) [2 d P* s( ?4 L
. O# J; u6 F2 G1 w0 J* T( l& I0 G
Standard(s): 8 p; i0 m* K% I8 LIEC 61558-1 " Y$ G* ]7 B: F; w6 ]9 p: n" XAll editions 1 D% H2 P2 f4 ~8 GSubclause(s):5 `5 {1 o% `2 |
15.3.29 X# G9 H8 ]% w6 i$ g2 u
No. Year ; t6 r( B; f% V4 HPDSH 8 }% O4 T5 u3 }' h# o1022 2010 ) ]3 ~ o, _3 d q9 K* C3 DCategory: SAFE Developed by: ETF57 l0 V; r! @1 G: l. D. M
OSM/LUM ( c) w+ G: y+ f# D# [* K5 _Subject: ( I8 \5 [4 w: S* ^Short circuit and overload* O' s$ F/ Y# X9 q
protection / H+ }3 |) Q, p% p- i! FKey words:3 X+ [; A+ e) k( l2 e% {( L
- Fuse current 2 \5 o6 M ?9 K0 n. F- Overloading test. i* N( u% t6 k& P% u
- Overload current 8 F0 ]: R6 g1 j l/ VTo be approved at the 49th + W$ r" n7 d1 Z6 D0 \2 PCTL Plenary Meeting, in 2012 ( j# F' k( | i3 _- _Question: 3 x0 J- Q, }4 n% _During the overloading test on the transformer according to § 15.3.2 the temperature of the windings and1 [: z3 U5 J, ]2 N- Q# S! e( Y5 L, w
their resistance increase and consequently the overload current decreases. Has the fuse current be* b9 `; y! h7 @5 r' D( n' N% s
readjusted to the original overload current during the test or no adjustment has to be made?4 l9 T1 J G+ J r
Decision:5 T! R% n! h; W: n
The fuse current has to be kept constant during the test.: ^# ?9 D; L0 w5 l: y. `& f# _1 K1 @
[attach]77267[/attach] # Y9 o/ ~9 o5 s5 c
PDSH 1022