|
|
22.7 Replacement:
U3 _" }8 D& l2 FAppliances having a steam bath function shall incorporate adequate safeguards against the
" \9 o- q8 o4 e J* ~ `/ O0 z' jrisk of excessive pressure.
7 i o4 W4 J* e1 D( s1 |0 z) T7 T3 ]: L2 e0 x6 l3 o- j
If jets of steam or hot water are emitted through protective devices, the electrical insulation9 t; }- A& i8 Q2 p
shall not be affected or the user exposed to a hazard.
. d/ b: s% ^# H4 t
9 k6 Z. Z1 E$ c6 H3 p9 [( D9 z5 OCompliance is checked by inspection and by the following test.: e. J6 f) B; G7 n- J. H2 S
L& J0 ^' ?9 B. RFor non-pressurized boilers, the water shall be supplied at a pressure not exceeding 150 kPa.
! S% i/ ~. B$ ]/ E! t
. a# k, c7 y% P/ e2 eFor pressurized boilers, the maximum pressure occurring during the test of Clause 11 with the$ N: l# ], I+ r' j. e" I
boiler filled but without steam emission is measured. All pressure-regulating devices
, Q9 c# c: ]; V6 O6 w. @that operated during the test are rendered inoperative and the pressure measured again. The
1 X# k6 b+ x0 @$ L3 I# Xpressure shall not increase by more than 200 kPa.: {# ]% Z# A& R( a: I
1 g; ]0 V: Q$ A& e
Any pressure-limiting protective device is then rendered inoperative and the pressure in
; o- m! X4 p" F$ e1 b9 a( m6 Y! athe boiler is raised hydraulically to five times the pressure measured originally or twice the6 h& G7 ?8 D) ]1 {* M* I Y
pressure measured with the pressure-regulating device operating during the test of Clause 11
; B$ V8 |* q' |/ B; W* G. F0 ?rendered inoperative, whichever is higher. There shall be no leakage from the boiler.
$ Y3 Q, i1 J$ p5 Z5 C; N. ^$ B) A+ d! V, j" `
请教有哪位大侠做过EN60335-2-105的22.7这个章节的测试?能否帮讲解一下这个测试怎么做,如何去理解这个条款?5 j2 K( ~. D3 Z! d
什么叫做是non-pressurized boilers; pressurized boilers 它们的定义是什么啊? l9 v) ~6 U3 F( Z
9 Y- T/ t) V0 x$ M
万分感激! |
|
/1 
|关于安规|小黑屋|安规QQ群|Archiver|手机版|安规网
( 粤ICP13023453-10 ) 
窥视卡
雷达卡
发表于 2008-12-5 10:21
提升卡
置顶卡
沉默卡
喧嚣卡
变色卡
抢沙发
千斤顶
显身卡