Siemens MICROMASTER 440 Operating Instructions Manual page 27

Issue B1
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 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!
NOTICE
♦
Ensure that the appropriate circuit-breakers/fuses with the specified current
rating are connected between the power supply and inverter (see chapter 7,
Tables starting on page 83).
♦
Use Class 1 60/75
torque see Table 7-2 on page 83.
Access to the power and motor terminals
You can gain access to the mains and motor terminals by removing the covers
(see also Appendices 0 to E.
The mains and motor connections must be made as shown in Figure 2-6.
MICROMASTER 440 Operating Instructions
6SE6400-5AC00-0BP0
o
C copper wire only (for UL compliance). For tightening
2 Installation
27