6 © Siemens plc1999 | G85139-H1731-U400-D2
WARNING
It is essential that the MIP is correctly earthed to the motor. This is usually achieved
using a short earth cable connected between the MIP and a suitable connection point
on the motor. Death or severe injury can result if the motor is not correctly earthed.
Incorrect earthing can also prevent any MICROMASTER Integrated built-in EMC filter
from operating correctly.
Electrical Installation | COMBIMASTER and
MICROMASTER Integrated
Remove the four M5 cross-head screws on
the inverter's cover to access the electrical
terminals (see Figs 2 and 3).
Notes: Refer to the Electrical Data tables for
cable sizes.
A ‘drip loop’ is recommended when
connecting the mains and control cables
(see Fig. 6).
CAUTION
The printed circuit boards contain CMOS components that are particularly sensitive to
static electricity. For this reason, avoid touching the boards or components with hands
or metal objects.
Mains Cable Connections
Ensure that the power source supplies the
correct voltage and is designed for the rated
current. Use the appropriate circuit-breakers
with the specified current rating between the
power supply and inverter.
Use Class 1 60/75
o
C copper wire only. Use a
4-core screened cable. If crimp terminals are
used they must be insulated. If crimps are
not used, the strip length must not exceed
5mm.
Feed the power cable into the inverter via the
gland hole nearest to the motor shaft.
Connect the power leads to terminals L1, L2,
L3 (L1, L2 for single phase units) and the
separate earth.
Use a 4 - 5 mm cross-tip screwdriver to
tighten the terminal screws.
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