Connection Of Cables As Shown On The Sketch - Man B&W S80ME-C7 Project Manual

MAN B&W
A cable with a cross section not less than 45 mm²
is used for cabling the shaftline earthing device to
the hull. The length of the cable to the hull should
be as short as possible.
Monitoring equipment should have a 4-20 mA
signal for alarm and a two range mV-meter with
a switch for changing range. Primary range from
0 mV to 50 -150 mV DC, and secondary range
from 0 mV to 300-1500 mV DC.
Fig. 5.17.02: The shaftline earthing device slip rings must be fitted on the foremost intermediate shaft as close to the
engine as possible
MAN B&W MC/MCC, ME-B/ME/MEC engines
When the shaftline earthing device is working
correctly, the electrical potential will normally be
within the range of 10-50 mV DC. The alarm set-
points should be 5 mV for a low alarm and 80 mV
for a high alarm. The alarm signals with an alarm
delay of 30 seconds and an alarm cut-off, when
the engine is stopped, must be connected to the
alarm system.

Connection of cables as shown on the sketch,

Fig. 5.17.01.
MAN Diesel MAN Diesel
5.17
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