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2 SAFETY WARNING
Denition of Safety Warning Symbols
Electrical Hazard Warning Symbol – Failure to observe this warning could result in electrical
shock or electrocution.
Operational Hazard Warning Symbol – Failure to observe this warning could result in serious
injury or death.
This product must be installed and serviced by a qualied technician, electrician, or
electrical maintenance person familiar with its operation and the hazards involved.
Proper installation, which includes electrical connections, fusing or other current protection,
and grounding, can reduce the chance of electrical shocks, and/or res, in this product or
products used with this product, such as electric motors, switches, coils, solenoids, and/or
relays. Do not use this drive in an explosion-proof application. Eye protection must be worn and
insulated adjustment tools must be used when working with drive under power. This product is
constructed of materials (plastics, metals, carbon, silicon, etc.) which may be a potential hazard.
Proper shielding, grounding, and ltering of this product can reduce the emission of radio
frequency interference (RFI) which may adversely aect sensitive electronic equipment. It is the
responsibility of the equipment manufacturer and individual installer to supply this Safety
Warning to the ultimate end user of this product. (SW 8/2012)
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 lter is
required. See RFI Filters & Chokes Selection Guide D-321 (Part No. A42027) for selection of lters that
meet the Industrial or Residential Standard. Additional shielded cable and/or AC Line cables may be
required along with a signal isolator (SIAC-PS).
3 INTRODUCTION
Thank you for purchasing the KBAC Adjustable Frequency Drive. KB Electronics, Inc. is committed to pro-
viding 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 / IP65 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 10 HP. The sine wave coded Pulse Width Modulated
(PWM) output operates at a carrier frequency of 16 kHz which provides high motor eciency 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 specic
applications 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.
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 provided, which can be used to turn equipment on or o , 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, DEC/I, COMP, CL, JOG, BOOST),
customer selectable jumpers (Line Voltage - dual voltage models only), Motor Horsepower, Automatic
Ride-Through / Manual Start, Motor Frequency, Frequency Multiplier, Fixed/Adjustable Boost, Regenera-
tive / Injection Braking, “Run” or “Fault” Output Relay Operation, NO/NC Stop Contact, Constant/Variable
Torque, Switching Frequency, and GFCI operation (KBAC-217 Series and KBAC-416 Series only).
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