CERUS CI-007-P2, Installation, Programming Operation, & Maintenance Manual

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Chapter 1 – Basic information
1.2 Basic configuration
The following devices are required to operate VFD. Proper peripheral devices must be selected and correct
connections made to ensure proper operation. An incorrectly applied or installed VFD can result in system
malfunction or reduction in product life as well as component damage. You must read and understand this
manual thoroughly before proceeding.
AC Power
Source Use a power source with a voltage within the
permissible range of VFD input power rating.
MCCB
Select circuit breakers or fuses in accordance with NEC
and applicable local codes.
Inline Magnetic
Contactor Do not use input power contactor for frequent starting
and stopping the VFD, otherwise VFD power
components can be damaged.
AC Line Reactor
or Harmonic
Filter
The line reactor provides some degree of surge
protection and decreases a level of harmonic distortion
in power line. It is recommended to use it when power
source kVA rating is more than 10 times higher than
VFD rating. The Harmonic filter provides higher level
of harmonic mitigation.
EMI/ RFI Filter
Install EMI/RFI filter to decrease VFD Electromagnetic
and Radio Frequency Interference with operation of
sensitive electronic equipment.
Variable
Frequency Drive
Install VFD with proper orientation, ventilation,
spacing etc. according to the manufacturer
requirements with all necessary protective and filtering
devices to provide long and reliable VFD operation.
AC Load
Reactor or
Output Filter
In order to protect a motor winding install a load
reactor for motors 380VAC and above with distance to
the motor greater than 45 feet or output filter for more
than 100 feet. Install an output filter for 200-230VAC
motors if distance is greater than 200 feet.
Three Phase AC
Induction Motor Opening the motor circuit by disconnect or contactor
during VFD run can damage VFD power components.