|
| PDSH 1022
, z- e. u6 e1 G7 p2 t
# F& \4 J+ }9 r$ V | Short circuit and overload protection
/ N# M/ H8 H% B2 v1 [( f9 N' | | 15.3.2
8 K% W0 P1 v- ?! x' n | 61558-1(ed.1);am1 & 61558-1(ed.2);am13 H% r, I2 R4 v8 O
| 5 W9 {* l3 d' [7 X( l% m7 P
Standard(s):# U3 Q, J+ R* M( o# |5 S8 q) t
IEC 61558-19 T! N% `* L$ C: z! l6 T }$ r, a' @
All editions( P9 s9 \8 q) M/ y
Subclause(s):5 R0 J. U5 |0 _8 _
15.3.2
1 t+ N2 d! @" NNo. Year
' q d4 Y; K5 J0 c- u' h# xPDSH2 A ?5 Q7 ?6 D( X. z6 U
1022 2010$ }9 o, W% M0 y5 Z6 w
Category: SAFE Developed by: ETF5
# T1 L9 k. Q- X' E7 WOSM/LUM0 }7 X$ o2 t5 O& k2 k
Subject:
& U- L7 n% K7 k, N) z/ u- |5 BShort circuit and overload
$ ?; s5 h9 Y. D& ~protection$ o. S4 o2 p; ?
Key words:0 u! D$ a0 c. v/ N. f+ C
- Fuse current" E3 U9 Z! m$ R) X) l8 W+ h9 H
- Overloading test
6 q. ?. o% [: I. _. G- Overload current
: R: X- X: f4 V3 DTo be approved at the 49th
( d2 L* x% B$ v% J* R% ACTL Plenary Meeting, in 2012
1 t+ u! L/ D& V6 i5 z Y7 w% w% xQuestion:
1 J2 T& J0 {/ q' PDuring the overloading test on the transformer according to § 15.3.2 the temperature of the windings and# j# |8 `" R4 V+ A
their resistance increase and consequently the overload current decreases. Has the fuse current be* Y7 v+ Q/ c: J, O# V. a5 c; _2 l. G
readjusted to the original overload current during the test or no adjustment has to be made?: C9 i* J: V. G# z, s
Decision:) b) _9 @! R" s+ D4 b& k- L
The fuse current has to be kept constant during the test.0 K0 @ \6 B1 }6 U3 C% u# E. @
/ _" b- u" J- x& o, M. ~
|
本帖子中包含更多资源
您需要 登录 才可以下载或查看,没有账号?注册安规
x
|