* G9 Z. q- I; {5 i0 K22.110 Non-self-resetting thermal cut-outs designed to be replaced after their operation% O5 c) q* b3 R3 G% D a* ~
shall open the circuit in the intended manner without short-circuiting live parts of different 0 i0 y; r# o- O) npotential and without causing live parts to come into contact with the enclosure. 2 C- w) S1 {7 G* ACompliance is checked by the following test.! w v# f4 I: V+ W k$ A
The appliance is operated five times, each time with a new non-self-resetting thermal cutout, - p9 v& t1 w2 many other thermally operated control devices being short-circuited.$ l. P8 [& p& M1 s) A% j
Each time, the thermal cut-out shall operate appropriately. 3 P9 B* [8 x6 A) mDuring the test, the enclosure of the appliance is connected to earth through a 3 A fuse; this ; W6 S6 r P5 ? g6 Cfuse shall not blow.5 q' {- o+ p* x( M( ~3 t; T
After this test, the supplementary heating elements shall withstand an electric strength test as: l7 q0 H* i3 c3 N1 h+ k& s9 r
specified in 16.3.6 F) y4 O! g8 e$ D. ]4 L# o0 w/ E 作者: tarry 时间: 2015-3-10 09:17
应该是如果失效控温元件，热熔断器能即时断开，3A电流保险丝不能断开，且耐压能过。这个测试要做5次。
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