Siemens MICROMASTER 440 Operating Instructions Manual page 35

Issue 10/03
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:
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 V/f control characteristic (P1300 =
0, 2 or 3).
CAUTION
After connecting the power and motor cables to the proper terminals, make sure
that the front 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 5-5).
♦ Use Class 1 60/75
torque see Table 5-2.
Access to the power and motor terminals
Access to the power supply and motor terminals is possible by removing the front
covers (See Fig. 2-8 to Fig. 2-10). See also Appendix B.
After removing the front covers and exposing the terminals, complete power and
motor connections as shown in Fig. 2-11.
Connection of braking unit (only for framesize FX and GX)
A passage opening for access to the intermediate circuit connections has been
provided on the top side of the inverter. It is possible to connect an external braking
unit (refer to Catalog DA65.11 or DA65.10) to these terminals. The position is
shown in Fig. 2-9 and Fig. 2-10.
The maximum cross section of connections is 50 mm², but only provided the
crimped area of cable shoes on the equipment side is provided with a heat-
shrinkable sleeve. This measure is important to ensure that air gaps and creep
distances are observed.
MICROMASTER 440 Operating Instructions
6SE6400-5AW00-0BP0
o
C copper wire only (for UL compliance). For tightening
2 Installation
35