3.3 WIC1 – Installation and Wiring
3.3.1
Grounding
WIC1_Z0E
PE
Tightening Torque: 1.6 Nm (14.2 lb⋅in)
Fig. 16: The grounding cable is fastened using the “PE” screw-nut.
WARNING!
The housing must be carefully grounded.
• Connect a ground cable (protective earth, 4 to 6 mm² [AWG 11‒9], tightening•
torque 1.6 Nm [14.2 lb⋅in]) to the housing, using the nut that is marked with the
“PE” symbol. (See also ╚═▷ “3.3.1.1 Nut “PE” for Grounding”.)
All grounding connections (i. e. protective earth) must be low-inductance, i. e. as short as
possible, and national standards – if applicable – must be followed.
CAUTION!
The devices are very sensitive to electro-static discharges.
A tabular overview of all terminals can be found in
╚═▷ “3.1.1 Terminals, Screws and
Torques” zu nden.
CAUTION!
The measuring winding (terminals S1and S2, and – if available – S3, S4) of the CTs must
not be earthed, otherwise the measurement results are distorted, ensuring in erratic
behavior of the WIC1.
66 WIC1 WIC1-1.0-EN-MAN
3 Hardware
3.3 WIC1 – Installation and Wiring
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