![YASKAWA VARISPEED-616G5 Скачать руководство пользователя страница 333](http://html2.mh-extra.com/html/yaskawa/varispeed-616g5/varispeed-616g5_instruction-manual_3217100333.webp)
12.2
Motor Application Precautions
12 - 5
12.2.2 Using the Inverter for Special Motors
J
Pole-changing Motor
The rated input current of pole-changing motors differs from that of standard motors. Select, therefore, an
appropriate Inverter according to the maximum input current of the motor to be used.
Before changing the number of poles, always make sure that the motor has stopped. Otherwise, the overvol-
tage protective or overcurrent protective mechanism will be actuated, resulting in an error.
J
Submersible Motor
Theratedinputcurrentofsubmersiblemotorsishigherthanthatofstandardmotors.Therefore,alwaysselect
an Inverter by checking its rated output current.
When the distance between the motor and Inverter is long, use a cable thick enough to connect the motor and
Inverter to prevent motor torque reduction.
J
Explosion-proof Motor
When an explosion-proof motor or increased safety-type motor is to be used, it must be subject to an explo-
sion-prooftest inconjunctionwiththe Inverter.Thisisalsoapplicablewhenanexistingexplosion-proofmo-
tor is to be operated with the Inverter.
Since the Inverter itself is, however, not explosion-proof, always install it in a safe place.
J
Gearmotor
Thespeedrangeforcontinuousoperationdiffersaccordingtothelubricationmethodandmotormanufactur-
er.Inparticular,continuousoperationofanoil-lubricatedmotorinthelowspeedrange mayresult inburning.
If the motor is to be operated at a speed higher than 60 Hz, consult with the manufacturer.
J
Synchronous Motor
A synchronous motor is not suitable for Inverter control.
If a group of synchronous motors is individually turned ON and OFF, synchronism may be lost.
J
Single-phase Motor
Do not use an Inverter for a single-phase motor. The motor should be replaced with a 3-phase motor.
12.2.3 Power Transmission Mechanism (Speed Reducers, Belts, and Chains)
If an oil-lubricated gearbox or speed reducer is used in the power transmission mechanism, oil lubrication
will be affected when the motor operates only in the low speed range. The power transmission mechanism
will make noise and experience problems with service life and durability if the motor is operated at a speed
higher than 60 Hz.
12
Содержание VARISPEED-616G5
Страница 1: ......