FIELD: electricity.
SUBSTANCE: purposed to contact main bus mounting base has shake-proof connecting terminal of draw-off line that is connected to diverting overvoltage protected device. Detachable adaptor is installed at mounting base; it has key element that comes in contact with connecting terminal of mounting base by means of output cord.
EFFECT: invention allows taking decision about mounting type at the site directly and user can change its mounting independently.
6 cl, 4 dwg
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