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THE MOTOR MUST BE CONNECTED TO AN APPROPRIATE SAFETY EARTH. FAILURE
TO DO SO CONSTITUTES AN ELECTRICAL SHOCK HAZARD.
ALL FREQUENCY CONVERTERS MUST BE PERMANENTLY EARTHED
In accordance with the European Low Voltage Directive standards VDE 0160 (1994)/EN50178 (1998)
permanent earthing requires either:-
i)
The cross section of the protective conductor should be at least 10mm
2
(copper). (Note this minimum
cross section was determined with regard to mechanical strength).
ii)
Laying of a second conductor through separate terminals and electrically parallel to the protective
conductor. Earth conductor shall individually satisfy the requirements for a protective conductor
(Note this ensures the equipment is still protectively earthed if one conductor is damaged).
For normal installation the Type 4 series will require two individual incoming protective earth
conductors (<10mm
2
cross section) and the Type 5, 6 and 7 one (
ŠŠŠŠ
10mm
2
cross section).
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Protective earthing arrangements for these models are provided by a single-size M4 diameter earth terminal
located at the centre of the power terminal array, together with two further earth terminals consisting of size M4
diameter slot-head screws and washers located on the lower face of the drive, as shown in the drawing below. In
all cases, the terminals are identified with the symbol
(IEC 417, Symbol 5019) and are intended to be used
with protective conductors terminated with compression terminations sized to accept the M4 diameter bolt fitted
and the conductor size selected. In Europe two incoming protective conductors shall be used for permanent
earthing, one connected to each of the terminals marked “PE” (‘A’ and ‘B’) whilst the motor protective
conductor shall be connected to the remaining earth terminal located on the lower face of the drive identified with
the symbol
only.
PE Supply 'A'
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This manual was downloaded on www.sdsdrives.com
+44 (0)117 938 1800 - [email protected]