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首先要搞清楚Thermal motor protectors和你所说的热熔断体(thermal link)的概念! h0 r+ K. f! |6 `) o
thermal link定义:thermal cut-out which operates only once and requires partial or complete replacement3 r8 S8 A: X/ q' D# X/ a8 V
在标准中并没有直接对Thermal motor protectors的定义, 且Thermal motor protectors在 annex D里面分为 self-resetting thermal motor protectors 和no self-resetting thermal motor protectors
, w8 G# L4 V; G ~但是我们可以参考标准中对于self-resetting thermal cut-out和 no self-resetting thermal cut-out的定义,. A3 o, X; n- n/ w
no self-resetting thermal cut-out定义:thermal cut-out that requires a manual operation for resetting, or replacement of a part, in order to restore the current.& ^$ W) k4 i) b# M& G8 S
从定义中可以看出热熔断体(thermal link)和非自复位热断路器(no self-resetting thermal cut-out)是两个不同的保护器件, 所以热熔断体自然也不能和no self-resetting thermal motor protectors等同7 [* g7 p4 o- T" P5 R
所以对于装有热熔断体的motor, annex D不适用
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