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! |! _8 D; c- C | Mains Transformers
1 I, E/ \4 {5 Y | 14.7! T' a2 @" Z$ E8 F
| 61010-1(ed.1);am1;am20 x" E7 ] ^3 A
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+ ^0 o- E+ A! m7 R/ V% CStandard:
# u- @# s/ K) `. w0 e' _IEC 61010-1:1990 +A1:1992 + A2
$ A( R4 v% L/ c8 x:1995+ l+ e* m6 X( ?7 {" J! g
Sub clause:
& Z5 w+ z" h" U- I* Z; t% @14.76 v& j m6 J+ c( `; P8 K) G
Sheet n. 359
" i$ s" g2 @# ^" I. Z" l. l8 C5 aPage 1(1)
- y- _1 K" p; ~9 YSubject:' i6 i0 D8 T& N% Q0 S" p% a* E% u5 e/ S
Mains transformers
0 A9 b4 L( H! E( r+ R3 r% C. lKey words:
; P3 g7 J0 O2 P" {+ j- Overload
$ Z$ v9 h2 h2 I- Temperature limits
; l, M }* }6 C/ E9 D* f" E- B8 a, XDecision taken by
' F( H w- J/ h9 J9 P7 f9 LETF3 and confirmed3 ` v4 X$ b$ ]' o
by CTL at its 38th
R' r: s+ l6 r! R. dmeeting, in Toronto% x: C* V) p7 J$ e
Question:
7 n5 a* |5 h/ y2 b1. What temperature limits are used?) z) q6 P* s2 f# w5 Y
2. The test specifies that the protective device is left in circuit but this will render the test+ _: }0 n. `6 X, h5 A. p
impractical if the device is a fuse, which may rupture in less than 1 hour. So how do
# i, X2 F5 z1 T% Z0 ~laboratories perform this test?
9 I7 i- |; T9 J0 d1 e3. "Directly Connected" can be seen as in many ways, can the laboratories share their
2 T9 }7 }9 [5 O& {% G- rpractice?
0 b- R4 j8 ^/ ADecision:
1 O/ Q* A) U% yIt was agreed that;. N5 l) T/ _' }3 J5 j
1.Table 4 'Motor temperatures' should be referenced.
0 A) l4 p, M u8 g6 R2. The test circuit should be arranged such that the test can continue for 1 hour.
h, n! Q: W* `( }) C3.The fuse should be connected such that no single fault condition between the transformer, H8 Z3 [5 ~$ p9 o% R( t! G
and the fuse should cause a hazard.
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发表于 2012-9-18 12:35
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