Main Circuit Wiring Operation; Control Circuit Connection; Function Of Control Circuit Terminals - Alpha AS600M Series Manual

Chapter 2 Installation and Wiring

2.4.2 Main Circuit Wiring Operation

Do not mistakenly connect the input power cable to the output terminal; otherwise
the components in the driver will be damaged. Output terminals are prohibited to be
grounded. The lines should not be collided with the enclosure, or short connected;
otherwise the driver will be damaged.
Earth terminal PE must be grounded. 380V class grounding resistance should be 10Ω or
less. The earth wire should never share with electric welder or power equipment. The
earth wire should be of conductor diameter specified in the technical standard for
electrical equipment, and should be as close to the ground point as possible. On
occasions using more than two drivers at the same time, please do not form the earth
wire into ring circuit. Proper grounding method and incorrect grounding method are
shown in Fig. 2-6
Right
Wrong
Notes: The neutral point of motor using Y connection can't be connected to earth.
Since the driver output PWM wave, if a capacitor for improving power factor or a
lightning varistor is installed on the output side, which would cause tripping or damage
to parts, be sure to remove it.
If a contactor or other on-off part is installed between the output and the motor, be sure
the on-off operation is done when the driver has no output, otherwise the driver would
be damaged.

2.5 Control Circuit Connection

2.5.1 Function of Control Circuit Terminals

In order to reduce interference and attenuation of control signal, the length of
control cables should be limited in 50m and away from power cables for more than
30cm. Avoid control wire and power wire being parallel. Try to use STP (Shielded
Twisted Pair) to connect analog input and output signal.
12
Inverter
Inverter
Figure 2-6 Earthing Connection Method
Inverter
Inverter
Inverter
Inverter