Fig. 2-5 Micromaster 420 Connection Terminals - Siemens MICROMASTER 420 Operating Instructions Manual

Issue 07/04
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 160).
Use Class 1 60/75
torque see Table 5-2, page 159.
Access to the power and motor terminals
You can gain access to the mains and motor terminals by removing the covers
(see also Appendices A and B).
The mains and motor connections must be made as shown in Fig. 2-6.
L3
L2/N
L1/L
Fig. 2-5
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0
o
C copper wire only (for UL compliance). For tightening
U V
MICROMASTER 420 connection terminals
W
2 Installation
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