WEG MW500 User Manual - page 19
MW500 | 13
Installation and Connection
- English -
3.2.3.4 Output Connections
ATTENTION!
The drive has an electronic motor overload protection that must be
adjusted according to the driven motor. When several motors are
connected to the same drive, install individual overload relays for each
motor.
The motor overload protection available in the MW500 is in accordance
with the UL508C standard. Note the following information:
1. Trip current equal to 1.2 times the motor rated current (P0401).
2. When parameters P0156, P0157 and P0158 (Overload current at
100 %, 50 % and 5 % of the rated speed, respectively) are manually
set, the maximum value to meet condition 1 is 1.1 x P0401.
ATTENTION!
If a disconnect switch or a contactor is installed at the power supply
between the drive and the motor, never operate it with the motor spinning
or with voltage at the drive output.
The characteristics of the cable used to connect the motor to the drive, as well as its
interconnection and routing, are extremely important to avoid electromagnetic
interference in other equipment and not to affect the life cycle of windings and bearings
of the controlled motors.
Keep motor cables away from other cables (signal cables, sensor cables, control cables,
etc.), according to
item 3.2.7 - Cable Separation Distance
.
Connect a fourth cable between the motor ground and the drive ground.
When using shielded cables to install the motor:
Follow the safety recommendations of IEC60034-25.
Use the low impedance connection for high frequencies to connect the cable shield
to the grounding. Use parts supplied with the drive.