Servomech S.p.A.
02.02-05-08-10-11-12.E - Rev. 00 Date (M/Y) 12/19
15
6.6
Electric motor wiring
6.6.1
AC 3-phase asynchronous motor
Connect the motor to the power unit of the plant or to the driver according to the following wiring diagrams,
related to the motor type:
(a)
AC 3-phase motor without brake
(b)
AC 3-phase motor with DC brake directly powered with rectifier
In case of brake motor:
the brake is NORMALLY CLOSED (NEGATIVE action). When the power supply is switched off, the brake
is engaged. The brake opens only when power is supplied;
if the brake is wired directly to the connecting pins of the terminal box, it does not require any power
supply.
Figure 6.5 – Electric wiring diagrams to power supply of AC 3-ph motor
Figure 6.6 – Electric wiring diagrams to motor terminal board of AC 3-ph motor
K1, K2, K3 = contactor
M = motor
Br = brake