YASKAWA GA80U4720ABM, Manual

Page: 61 / 1016

Electrical
Installation
3
3.1 Section Safety
YASKAWA SIEPC71061737B GA800 Drive Technical Reference 61
WARNING
Damage to Equipment
Do not apply incorrect voltage to the main circuit of the drive. Operate the drive in the specified
range of the input voltage on the drive nameplate.
Voltages that are higher than the permitted nameplate tolerance can cause damage to the drive.
Fire Hazard
When you install a dynamic braking option, wire the components as specified by the wiring
diagrams.
Incorrect wiring can cause damage to braking components or serious injury or death.
NOTICE
Do not let unwanted objects, for example metal shavings or wire clippings, fall into the drive during
drive installation. Put a temporary cover over the drive during installation. Remove the temporary
cover before start-up.
Unwanted objects inside of the drive can cause damage to the drive.
Damage to Equipment
When you touch the drive and circuit boards, make sure that you observe correct electrostatic
discharge (ESD) procedures.
If you do not follow procedures, it can cause ESD damage to the drive circuitry.
Select a motor that is compatible with the load torque and speed range. When 100% continuous
torque is necessary at low speed, use an inverter-duty motor or vector-duty motor. When you use a
standard fan-cooled motor, decrease the motor torque in the low-speed range.
If you operate a standard fan-cooled motor at low speed and high torque, it will decrease the cooling effects and can
cause heat damage.
Obey the speed range specification of the motor as specified by the manufacturer. When you must
operate the motor outside of its specifications, contact the motor manufacturer.
If you continuously operate oil-lubricated motors outside of the manufacturer specifications, it can cause damage to
the motor bearings.
When the input voltage is 440 V or higher or the wiring distance is longer than 100 m (328 ft), make
sure that the motor insulation voltage is sufficient or use an inverter-duty motor or vector-duty
motor with reinforced insulation.
Motor winding and insulation failure can occur.
Before you connect a dynamic braking option to the drive, make sure that qualified personnel read
and obey the Braking Unit and Braking Resistor Unit Installation Manual (TOBPC72060001).
If you do not read and obey the manual or if personnel are not qualified, it can cause damage to the drive and braking
circuit.
Make sure that all connections are correct after you install the drive and connect peripheral
devices.
Incorrect connections can cause damage to the drive.
Note:
•
Torque characteristics differ compared to operating the motor directly from line power. The user should have a full understanding of the
load torque characteristics for the application.
• The current rating of submersible motors is usually higher than the current rating of standard motors for a given motor power. Make sure
that the rated output current of the drive is equal to or more than the current rating of the motor. If the motor wire length is longer than 100
m (328 ft), select the correct wire gauge to adjust for a loss in voltage and prevent a loss of motor torque.
• Do not use unshielded wire for control wiring. Use shielded, twisted-pair wires and ground the shield to the ground terminal of the drive.
Unshielded wire can cause electrical interference and unsatisfactory system performance.