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|  PDSH 893
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3 U3 Z, J' a6 G | Electrical connections
, Y y3 F; ~. X# M; \) E, ^, Q4 \. R; a | 7.2.1- \' ]* a$ F% @. u
| 60598-1(ed.3);am1 & 60598-1(ed.4);am1 & 60598-1(ed.5) & 60598-1(ed.6);am1 & 60598-1(ed.7)
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Standard(s):
4 C( c8 u( `8 T) T* ?0 AIEC 60598-1 All editions
" K4 Y8 z" q: Z9 p# R7 pSubclause(s): 7.2.1
( t" O, Y6 ~- n9 [7 j* j% ]( SNo. Year DSH 0893 2010
$ Q0 T4 Y6 R7 X# c( uCategory: LITE Developed by: ETF5 OSM/LUM
; d2 v" N6 ^& Q8 O9 GSubject:1 v) B$ k8 v. u, l# u3 p
Electrical connections4 j8 \1 V* D, m5 e9 f
Key words:' X, }) A9 E1 s0 n; }0 G5 K
- Mechanical stress
" D3 B) l" J1 u- Terminal block
9 X& q2 {" z. h! j& l- Earth connection
. _2 e1 l6 D! q5 mApproved at the 49th CTL Plenary Meeting, in 2012
. `7 s5 p% h" ^5 FQuestion:& D* h% @) Q9 _; Q3 S5 L' q
Sometimes a terminal block for supply connection is directly fitted to a tag of luminaire housing (serving5 B# g$ u, _& q5 z5 J, V" A2 k' K* v
as internal earth connection) without additional fixation of the terminal block. As the rigidity of this tag is
' Q" r( g4 ~# \" z7 g* L6 J4 fmostly sufficient, it seems that the fixation of the terminal block is adequate. However during supply
( ~3 I2 x7 Q# N' a# y( lconnection unacceptable mechanical stresses to this earth connection can occur. Even in the case where, {- @# Q0 F0 v$ ^) u" R9 M
the terminal block is additionally fixed by means of plastic clips, an unbending fixation of the terminal
6 D8 [+ c! O" V9 fblock, in particular when serving the supply terminals, is not always guaranteed. Attention has to be paid
* t7 o( Q! ]* a, Ialso to the question if a terminal block, fixed only to a tag of the luminaire housing, has to be regarded as
6 i2 Q8 P% w% r5 qa loose terminal block.# C9 o# s& m- K+ a
Decision:8 d9 G8 Z% u2 e7 \
Fixation of a terminal block, to a tag of the luminaire housing is only allowed if this connection
+ _2 q9 I8 r* J4 g' Eguarantees sufficient reliability. Additional fixation may be required to prevent unacceptable mechanical. M- Q! k- T# n3 Q5 C2 o, }$ O
stresses to the internal earth connection during supply connection.+ R' @$ V) P2 \! D
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) \: N, t& j* x! e9 f! m2 T, C
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发表于 2012-9-17 13:14
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