KB Electronics KBAC-29 (1P) - Manual (Page 7)

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3 INTRODUCTION
Thank you for purchasing the KBAC Adjustable Frequency Drive. KB Electronics, Inc. is committed to
providing total customer satisfaction by producing quality products that are easy to install and operate. The
KBAC is manufactured with surface mount components incorporating advanced circuitry and technology.
The drives are variable speed controls housed in a rugged NEMA-4X / IP-65 washdown and watertight
die-cast aluminum enclosure. They are designed to operate 208 – 230 and 400/460 Volt 50 & 60 Hz
3-phase AC induction motors from subfractional thru 5 HP. The sine wave coded Pulse Width Modulated
(PWM) output operates at a carrier frequency of 16 kHz which provides high motor efficiency and low noise.
Adjustable Linear Acceleration and Deceleration are provided, making the drive suitable for soft-start
applications.
Due to its user-friendly design, the KBAC AC drive is easy to install and operate. Tailoring to specific applica-
tions is accomplished with selectable jumpers and trimpots, which eliminate the computer-like programming
required on other drives. However, for most applications no adjustments are necessary. For more advanced
programming, PC based Drive-Link™ software is available.
Main features include adjustable RMS Current Limit and I 2 t Motor Overload Protection.* In addition, Adjustable
Slip Compensation with Static Auto-Tune and Boost provides high torque and excellent load regulation over a
wide speed range. Power Start™ delivers over 200% motor torque to ensure start-up of high frictional loads.
Electronic Inrush Current Limit (EICL™) eliminates harmful AC line inrush current. A Run/Fault Relay is provid-
ed, which can be used to turn on or off equipment or to signal a warning if the drive is put into the Stop Mode
or if a fault has occurred. The drive is suitable for machine or variable torque (HVAC) applications. Also, a
jumper is provided for selection of Regenerative or DC Injection Braking.
Standard front panel features include Diagnostic LEDs for “Power On” and “Drive Status”, a Start/Stop Switch,
and a Main Speed Potentiometer. Other features include a Barrier Terminal Block to facilitate wiring of the AC
line and motor, adjustable trimpots (MIN, MAX, ACCEL, DECEL, COMP, CL, JOG, BOOST), customer selec-
table jumpers (Line Voltage (dual voltage models only), Motor Horsepower, Automatic Ride-Through / Manual
Start, Motor Frequency, Frequency Multiplier, Fixed/Adjustable Boost, Regenerative / Injection Braking, “Run”
or “Fault” Output Relay Operation, NO/NC Stop Contact, Constant/Variable Torque, I 2 t Overload Selection).
Optional accessories include: Forward-Stop-Reverse Switch, On/Off AC Line Switch, Run-Stop-Jog Switch,
Signal Isolator, Auto/Manual Switch, Class ”A” AC Line Filter, Multi-Speed Board, Programming Kit, Modbus
Communication Module, and Liquidtight Fittings. A connector is provided for easy installation of accessories.
Custom software: all models can be factory programmed for applications which require special timing, PLC
functions, and GFCI operation – contact our Sales Department.
*UL approved as an electronic overload protector for motors.
3.1 STANDARD FEATURES
• Industrial Duty Die-Cast Aluminum Case with Hinged Cover – Available in black finish or FDA
approved white finish.
• Simple to Operate – Does not require programming. Uses trimpots and jumpers, which are factory
set for most applications.
• Motor HP Selection Jumper – Allows the drive to be used on a wide range of motors without
recalibration.
• Diagnostic LEDs – Power on (POWER) and drive status (STATUS).
• Run/Fault Relay Output Contacts – Can be used to turn on or off equipment or to signal a
warning if the drive is put into the Stop Mode or a fault has occurred.
This product complies with all CE directives pertinent at the time of manufacture. Contact our Sales
Department for Declaration of Conformity. Installation of a CE approved RFI filter is required. See RFI
Filters & Chokes Selection Guide D-321 (Part No. A42027) for selection of filters to meet the Industrial or
Residential Standard. Additional shielded cable and/or AC line cables may be required along with a signal
isolator (SIAC (Part No. 9600)).