2 Installation International English
MICROMASTER 440 Operating instructions
26 6SE6400-5CA00-0BP0
Operation with long cables
Caution
The control, power supply and motor leads must be laid separately. Do not feed
them through the same cable conduit/trunking. Never use high voltage insulation
test equipment on cables connected to the inverter.
All inverters will operate at full specification with cable lengths up to 50 m screened
or 100 m unscreened.
2.4.2 Power and motor connections
Warning
♦ Isolate the mains electrical supply before making or changing connections to
the unit.
♦ Ensure that the inverter is configured for the correct supply voltage: single /
three-phase 230 V MICROMASTERS must not be connected to a higher
voltage supply.
♦ When synchronous motors are connected or when coupling several motors in
parallel, the inverter must be operated with voltage/frequency control
characteristic (P1300 = 0, 2 or 3).
Caution
After connecting the power and motor cables to the proper terminals, make sure
that the covers have been replaced properly before supplying power to the unit!
Note
♦ Ensure that the appropriate circuit-breakers/fuses with the specified current
rating are connected between the power supply and inverter (see Tables
starting on page 77).
♦ Use Class 1 60/75
o
C copper wire only (for UL compliance). For tightening
torque see table on page 79.
♦ To tighten up the power terminal screws use a 4 - 5 mm cross-tip screwdriver.
Access to the power and motor terminals
The procedure for accessing the power and motor terminals on the
MICROMASTER 440 Inverter is illustrated in Appendices. Please also refer to the
photographs showing the Power Terminal connections and the Control Terminal
connections on the inside of the back cover of this manual.
When the covers have been removed to reveal the terminals, connect the power
and motor connections as shown on the next page.
http://nicontrols.com
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