Operating instructions

Issue 10/06 2 Installation
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
29
2.4.2 Power and motor connections
WARNING
The inverter must always be grounded.
♦ Isolate the mains electrical supply before making or changing connections to
the unit.
♦ Ensure that the motor is configured for the correct supply voltage: single /
three-phase 230 V MICROMASTERS must not be connected to a 400 V
three-phase 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!
NOTICE
♦ Ensure that the appropriate circuit-breakers/fuses with the specified current
rating are connected between the power supply and inverter (see chapter 5,
Tables starting on page 186).
♦ Use Class 1 60/75
o
C copper wire only (for UL compliance). For tightening
torque see Table 5-2, page 185.
Operation with long cables
All inverters will operate at full specification with cable lengths up to 50 m screened
or 100 m unscreened.
When using output reactors as shown in Catalog DA 51.2, the following cable
lengths are possible:
Supply Voltage 200 V … 240 V ± 10 % 380 V … 400 V ± 10 % 401 V … 480 V ± 10 %
Frame Sizes A … C A … B C A … C
Shielded 200 m 150 m 200 m 100 m
Non-shielded 300 m 225 m 300 m 150 m
CAUTION
When using output reactors and LC filters, operation up to a pulse frequency of 4
kHz only is permitted. Please ensure that the automatic pulse frequency reductions
are also deactivated. Mandatory parameter settings when using an output reactor:
P1800 = 4 kHz , P0290 = 0 or 1.