19.4 The appliance is tested under the conditions specified in clause 11. Any control that
limits the temperature during the test of clause 11 is short-circuited.
NOTE If the appliance incorporates more than one control, they are short-circuited in turn.
19.5 The test of 19.4 is repeated on class 0I appliances and class I appliances
incorporating tubular sheathed or embedded heating elements. However, controls are not
short-circuited but one end of the element is connected to the sheath of the heating element.

请问此两段话意思是不是说0I与I类器具在做完19.4断开控制器后，再做19.5不断开控制器？

是的，不用短路温控器。

Quote:

引用第0楼莫惜言于2011-12-02 17:04发表的 GB4706.19的问题 :
19.4 The appliance is tested under the conditions specified in clause 11. Any control that
limits the temperature during the test of clause 11 is short-circuited.
NOTE If the appliance incorporates more than one control, they are short-circuited in turn.
19.5 The test of 19.4 is repeated on class 0I appliances and class I appliances
incorporating tubular sheathed or embedded heating elements. However, controls are not
.......

准确的说，是针对装有带管状外鞘或埋入式电热元件的0I和I类器具。

貌似只对用氧化镁等吸湿材料作为绝缘材料制成的管状外鞘的电热元件才需要。
用PVC或硅橡胶等材料作为绝缘材料的管状外鞘的电热元件不用做19.5。

针对装有带管状外鞘或埋入式电热元件的0I和I类器具不需要作温控断开测试