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( y, ]3 a: I9 k9 m | Mains Transformers
' S! Z+ o* |( T& |4 L | 14.72 Y$ k: ^$ q m
| 61010-1(ed.1);am1;am2) R- O% n1 k/ q* P7 C6 y
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Standard:6 e4 D+ \) N0 E, e" B+ U
IEC 61010-1:1990 +A1:1992 + A2
! F8 i1 E' ~) [1 X8 p- T:1995
0 A* x- e4 B( G" Z/ ~3 BSub clause:
; j; \3 g" N& X( {14.7
/ C0 l" X; T% U0 x! RSheet n. 359: ^) u9 p* Z$ q5 ^$ }9 ~
Page 1(1)
0 q) z- U& H+ s/ PSubject:! G7 B! y p5 ^9 ?0 i, O
Mains transformers6 D9 y7 f* [" P5 }( _- t5 h! Z1 C
Key words:
& T( w9 d( o3 K4 _- R$ T# B, |8 a- Overload
* l& r+ w: W' r: ?- Temperature limits' r8 ?; |+ ]" O4 d/ P! n( h: ]+ u
Decision taken by
9 c$ s) q; q9 _% sETF3 and confirmed
+ }2 j( f L9 N: r1 r% i" [by CTL at its 38th
; ]0 h! K$ S9 w9 P- tmeeting, in Toronto! g2 S& I h+ X- ~7 m
Question:& {; b! f- `$ K0 l4 j
1. What temperature limits are used?
+ z4 ^2 M2 ?, s2. The test specifies that the protective device is left in circuit but this will render the test
7 ^% w3 Z! t" q6 @0 A; r/ Himpractical if the device is a fuse, which may rupture in less than 1 hour. So how do
7 E# q2 m( ^5 wlaboratories perform this test?; S7 H% o) @# B1 [
3. "Directly Connected" can be seen as in many ways, can the laboratories share their1 r: X; i5 x g+ U+ I
practice?( M5 w1 Q7 d% ^6 C
Decision:
6 r2 b* {% Y. o' ] y2 g1 cIt was agreed that;
: D) i6 d' v/ a+ v1.Table 4 'Motor temperatures' should be referenced.
* w3 C) n7 N! a2. The test circuit should be arranged such that the test can continue for 1 hour.
2 e0 [4 j$ A" S3.The fuse should be connected such that no single fault condition between the transformer" ]5 O9 G! G q- W, v2 `3 c
and the fuse should cause a hazard.% {% ~0 f. i$ Q h# v7 _1 Y
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发表于 2012-9-18 12:35
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