Siemens 420 manual Power and motor connections, Access to the power and motor terminals

Issue 07/04 2 Installation

2.4.2Power 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 60/75oC copper wire only (for UL compliance). For tightening 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

U V W

Fig. 2-5 MICROMASTER 420 connection terminals

MICROMASTER 420	Operating Instructions
6SE6400-5AA00-0BP0	29