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参照下面61558,请问+ V0 W1 j- W& Q+ n8 P& p
变压器的输出connector(见图片), glow-wire test(灼热丝测试) 要做多少温度?
' S) I( v; ~. d/ [' E: V变压器输出24VAC 0.25A
3 f4 K, ^: S! [( b# v n& g) b9 O9 {
, d# A2 Q1 O# [0 _" Q5 F6 y27.3.1 External accessible parts
( v, g; U0 d; ]& |% qExternal parts of insulating materials shall be resistant to ignition and spread of fire.
* J# K8 g K6 E: y; iCompliance is checked by subjecting enclosures and other external accessible parts to the( M0 M9 K/ m: U& `% Y1 X
glow-wire test with the temperature of the glow wire as follows: C; t# B. t* a c: K/ z- @: w
– 650 °C for enclosures
' u: X7 M$ M$ S" j. w" d. l0 m- M8 {– 650 °C for parts retaining current carrying (keeping in position) parts in position and
3 {" l5 a& ~# h# w4 wterminals for external conductors which carry a current up to 0,2 A during normal
( N! w( I: f: J- b! p8 Moperation9 q" I- C* L% a- p8 _8 O; @
– 750 °C for parts retaining (keeping in position) current carrying parts in position and
" `2 J# I, @3 F9 a, Z, r' G( |terminals for external conductors with fixed connection (e.g., soldering) which carry a7 y, `) s6 w' c
current exceeding 0,2 A during normal operation) z- K4 c% J7 X2 s; I; h
– 850 °C for parts retaining (keeping in position) current carrying parts in position and N7 W7 ]) o. U7 v# n
terminals for external conductors with non-fixed connection which carry a current! ]. n' v# y: E+ A+ Z* h4 }
exceeding 0,2 A during normal operation
# X- O5 `0 X( l6 wNo glow wire tests are required for foils in thin sheet form with a thickness of up to 0,2 mm.4 Y, r% N J+ k0 p" _0 V
27.3.2 Internal parts
) d9 b+ C2 ?9 B" X% T0 n6 i3 BParts of insulating materials retaining (keeping in position) current carrying parts in position6 h4 V& K! S* g H' _/ P. R
shall be resistant to ignition and spread of fire.% y6 _. \9 ^5 L4 _, l8 z7 x
Compliance is checked by subjecting the parts of insulating materials to the glow-wire test
) G# C! C: }/ u6 dwith the temperature of the glow wire as follows:9 X/ }) G' N/ u$ t+ e
– 550 °C for internal insulating material not retaining (not keeping in position) current
9 j6 y8 K6 E& h: vcarrying parts in position
& N3 n6 ^; m: F4 M– 650 °C for coil formers (bobbins)0 u& r' c" a$ E) H" s
– 650 °C for parts retaining (keeping in position) current carrying parts in position and0 q! R4 h3 J3 S/ a" m" T" }: y
terminals for external conductors which carry a current up to 0,2 A during normal
8 M" i: ]5 c5 s" zoperation! d9 N# `# f" |8 u
– 750 °C for parts retaining (keeping in position) current carrying parts in position and
+ d& e6 I! M+ [6 v3 h% o: n! h0 wterminals for external conductors with fixed connection (e.g., soldering) which carry a
( T7 b8 e) w u! o) Ecurrent exceeding 0,2 A during normal operation
. F& {4 f( u: Z7 n4 `8 w– 850 °C for parts retaining (keeping in position) current carrying parts in position and
/ L1 {# |( d$ Z: `terminals for external conductors with non fixed connection which carry a current, f- ~" d0 r" L/ f( p% ~# C, m8 H
exceeding 0,2 A during normal operation
' p7 Z; d0 w2 `; I$ ]- U7 YNo glow wire tests are required for foils in thin sheet form with a thickness of up to 0,2 mm. |
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