# ^6 E- f4 m8 h x6 DStandard:2 K0 K1 ?6 a0 ]5 R. e: A
IEC 61010-1:1990 +A1:1992 + A2( A: c, g9 G6 P- B, M; R4 T# ~: _
:19953 B9 y& c! t. z5 Q# _. M
Sub clause: ( c V! n% v. t6 p5 [14.74 O. O6 Z! s" T, r
Sheet n. 359- e+ k$ G3 ^# b1 f" Y
Page 1(1)" c+ u* v/ u; B$ @
Subject: & h& u1 l2 v3 qMains transformers, Y# P1 s9 A% w, }$ t6 Y1 I
Key words:- ?+ M2 z6 F) s2 J
- Overload* b8 X4 f4 T8 X2 l# ^0 X, [( J
- Temperature limits8 r( \& D& ^5 t d. V1 a: E
Decision taken by2 u. h( B- x! V4 r1 Y2 q
ETF3 and confirmed 5 i' c- F1 c9 w& Zby CTL at its 38th ) G3 e ~8 |: h. b3 U3 Cmeeting, in Toronto- y" F2 ]5 {$ e2 a' B# T1 s. j: E/ y
Question:+ v9 J) \5 H# o1 Y' m4 E
1. What temperature limits are used? " ^8 l& a, L: l |' _. [: s2. The test specifies that the protective device is left in circuit but this will render the test ( b3 m; m7 o L# n6 Qimpractical if the device is a fuse, which may rupture in less than 1 hour. So how do ! _+ g* a4 ]3 Q9 B5 T3 H; ylaboratories perform this test? . Y$ M* ^ h8 S5 ^4 L8 r3. "Directly Connected" can be seen as in many ways, can the laboratories share their& U. l( I+ N! |% e F
practice?- x) _9 H& A: K* Q' q/ Y+ r
Decision: , U2 }) T4 Y2 \! ` HIt was agreed that; 4 l7 w( p9 m& ]. H$ [1.Table 4 'Motor temperatures' should be referenced. - i$ D$ V3 T! C3 |$ ^2. The test circuit should be arranged such that the test can continue for 1 hour. " q" o4 f9 h; I+ c- [, w$ W j$ ]3.The fuse should be connected such that no single fault condition between the transformer( U& Q* s, X. ?& Z9 K! K4 q4 u
and the fuse should cause a hazard.& ~ r8 n* @& v3 ^0 f
6 B- o. A8 s3 l[attach]76172[/attach] 6 Q/ C# }6 v d$ q1 S6 k( X% l. X! b. z- m. C8 _
