一体式是什么意思呢
按照associated controlgear的定义，它是给特定仪器供电的，可以在特定仪器内或外，那在外面的时候可不可以是独立式？
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对于 assciated 和 independent的理解，可以参看IEC 61558-1中对类似类型变压器的解释3.1.6, 3.1.6.1, 3.1.6.2以及3.1.7
(61347-2-13在定义上极大程度地借鉴了IEC 61558-1, 当然一个是针对变压器，一个是针对控制装置)
3.1.6
associated transformer
transformer designed to supply a specific applianceor equipment, or a part of them, and
being either an incorporated transformer or a transformer for specific use
3.1.6.1
incorporated transformer
associated transformer designed to be built into a specific appliance or equipment, or into a
part of them, and the enclosure of which provides protection against electric shock
3.1.6.2
transformer for specific use
associated transformer fixed to or delivered with the appliance or equipment, without being
incorporated in this appliance or equipment and having its ownenclosure which provides
protection against electric shock
3.1.7
independent transformer
transformer designed to supply unspecified appliances and intended to be used without any
additional enclosure which provides protection against electric shock
NOTESuch a transformer can be either a portable transformer or a stationary transformer.
associated 可以是incorporated （装在器具内部，需要依赖器具外壳来防触电）和specific use(可以在器具内部或者是在器具外部，可以依赖自身的外壳来防触电）。
由此看来，装不装在器具内部，有没有自身的外壳，不是区分associated和independent的重点。
区分的重点在于associated是给特定的设备供电的（例如61347－2－13拿应急照明装置的情况来举了一个例子）;而indepedent是可以给不特定的设备供电的。
61347－2－13中提及的independent，特指可以给不特定照明设备供电的控制装置。 Frank说的对，将independent 也可看做SELV-equivalent，我认为也可以从这方面去理解，independent的在应用中也可用做built-in，所以也要考量SELV-equivalent的测试。 其实我还是有点模糊……我是新手。弱弱的问：那是不是不管是独立式还是一体式，都会有等效SELV呢？还有等效SELV和SELV之间的区别在哪？
要是问的问题有点弱智……请见谅哈……
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