Servomech S.p.A.
21.15-25-50-100-150-200.E - Rev. 01 DD (M/Y) 10/19
12
6.4
Electric motor wiring
6.4.1
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
(c)
AC 3-phase motor with 3-phase brake directly powered
(d)
AC 3-phase motor with DC brake separately powered AC 1-phase with rectifier
(e)
AC 3-phase motor with AC 3-phase brake separately powered
(f)
AC 3-phase motor with DC brake separately powered AC 2-phase with rectifier
(g)
AC 3-phase motor with DC brake separately powered
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;
if the brake is wired separately, make sure that the correct voltage is used;
if the brake is equipped with hand release device, make sure that the brake is engaged before starting
the linear actuator.
Figure 6.3 – Electric wiring diagrams to power supply of AC 3-ph motor
K1, K2, K3 = contactor
M = motor
Br = brake
