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& \+ v2 j0 n( h' W | Mains Transformers8 j3 ^/ B0 S9 c+ @9 o. ~
| 14.74 o3 l/ @' U3 ?4 ~! ^+ j# y
| 61010-1(ed.1);am1;am2
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x, `) E6 q( Q# Y# O* t# tStandard:- Q2 d; r! b7 d$ z) O
IEC 61010-1:1990 +A1:1992 + A2
; ?6 F7 ^) Q& b3 I3 h* D:1995
, Y8 @) P2 b! i2 D7 Y" p- C9 _Sub clause:
, q! {3 Y% _6 @: e' \14.77 h4 ]4 {1 N5 B' ?+ q
Sheet n. 3598 S. a5 ^! i- r3 X# ]' [! @
Page 1(1)5 d3 d2 k. k* p, E3 E( H
Subject:! E* }0 C1 ^7 l; d# F
Mains transformers
0 r( U3 [& E( a( P# u( `Key words:
( p6 ]2 G7 f$ a+ x" P9 y/ [' r- Overload
! x7 l' O3 C6 r% o5 b- Temperature limits
- E4 O: H" S4 l9 c1 PDecision taken by+ w: Q3 Y6 h# S! D4 G
ETF3 and confirmed9 ] G7 D/ q6 ?( F. @6 I5 J
by CTL at its 38th8 E9 c( `# I. K+ @! ?. H
meeting, in Toronto2 Y7 K* U' T) o' g5 p
Question:7 C6 o5 p `. g# R V" P! u
1. What temperature limits are used?$ E2 y; T. @5 J* ^, |2 D+ E
2. The test specifies that the protective device is left in circuit but this will render the test, `* s7 P8 R+ m b$ E( T
impractical if the device is a fuse, which may rupture in less than 1 hour. So how do% j9 R5 e/ n5 R. L5 E# p( Z( w6 i
laboratories perform this test?
- }& `7 K8 F4 H5 D" x& M# e3. "Directly Connected" can be seen as in many ways, can the laboratories share their
; w" q+ ?) c9 Epractice?
, _% r: F6 n) ?; wDecision:+ M- D4 j) ]4 i0 g* v+ w9 C; o& f
It was agreed that;* t; ]. B# W+ y$ ?
1.Table 4 'Motor temperatures' should be referenced.1 Y! ?' P- K2 F+ F q$ l E! {
2. The test circuit should be arranged such that the test can continue for 1 hour.
0 A9 L Y$ U: { l. g3.The fuse should be connected such that no single fault condition between the transformer
6 W9 C, Q7 c7 h9 f1 Zand the fuse should cause a hazard.1 T" D6 c* C+ m2 R! B
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