SEW-Eurodrive MOVIDRIVE MD*60A Series, Operating Instructions Manual

Page: 16 / 102

14
MOVIDRIVE
®
MD_60A Operating Instructions
Installation instructions for basic unit
Separate cable
ducts • Route power cables and electronics cables in separate cable ducts.
Input fuses and
earth-leakage
circuit breakers • Install the input fuses at the beginning of the supply system lead behind the
supply bus junction (
→
Wiring diagram for basic unit, power section and brake).
• Using an earth-leakage circuit breaker as the sole protection device is not
permitted. Earth-leakage currents > 3.5 mA can arise during normal operation of
the inverter.
Supply system
and brake
contactors • Only use contactors in utilization category AC-3 (IEC 158-1) as supply system
and brake contactors.
PE mains
connection (
→
EN 50178)
• With a supply system lead < 10 mm
2
(AWG 8): Lay a second PE conductor with
the cross section of the supply system lead in parallel to the protective earth via
separate terminals or use a copper protective earth with a cross section of 10
mm
2
(AWG 8).
• With a supply system lead
≥
10 mm
2
(AWG 8): Lay a copper protective earth
with the cross section of the supply system lead.
IT systems • SEW recommends using earth-leakage monitors with a pulse code measuring
process in voltage supply systems with a non-earthed star point (IT systems). This
avoids mis-tripping of the earth-leakage monitor due to the earth capacitance of the
inverter.
Cross sections • Supply system lead: Cross section according to nominal input current I
in
at rated
load.
• Motor lead: Cross section according to output rated current I
N
.
• Electronics cables:
– One core per terminal 0.20 – 2.5 mm
2
(AWG 24 – 12)
– Two cores per terminal 0.20 – 1 mm
2
(AWG 24 – 17)
Unit output • Only connect ohmic/inductive loads (motors). Never connect capacitive loads!
02476AXX
Fig. 11: Only connect ohmic/inductive loads; do not connect capacitive loads
E Q Q