General Features
All by ik-technics GmbH delivered current transformers comply with IEC 185, IEC 44-1, DIN VDE 0414 part1, harmonisation document HD 553 S2, VDE 1000, DIN 42600 as well as the regulations VBG 4, VDE 0106 Teil 100.
General Mechanical Features:
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-unbreakable plastic casing
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-difficult to inflame, according to UL 94 VO and self-extinguishing
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-nickel-plated secondary terminals with plus minus screws (0.5Nm)
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-integrated secondary terminal caps
General Electrical Features:
-rated frequency 50-60 Hz (the frequencies on request)
-class of insulation E (other classes on request)
-rated short-time thermal current Ith=60 . IN
-nominal surge current Idyn=2,5 . Ith, minimum 100kA at all window type c.t.'s
-highest voltage for equipment Um=0,72kV (other voltages on request)
-rated power-frequency withstand voltage 4kV/1min (other voltages on request)
-instrument security factor FS5 or FS10
All current transformer are dimensioned (except for some marked types) in accordance with VDE 0414 for a rated continuous thermal current of ID = 1,2 . IN
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WINDOW TYPE CURRENT TRANSFORMER
Current transformers are frequently secured with the help of a lug through which a clamping screw fits onto the primary bar. You must have noticed what a nuisance this lug can be, for instance when you want to install the c.t. behind fuse switch disconnectors, fuse trips or between bar overlaps and exits.
The new current transformers have their own solution to this problem. The conventional fixing device has been designed with a form-locking guide so that - if necessary it can simply be pulled out.
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