“The Right Control for Your Application.”
12095 NW 39 Street, Coral Springs, FL 33065-2516
KB Electronics, Inc. Phone: 954-346-4900; Fax: 954-346-3377
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(A40288) - Rev. E - 6/6/2005 - Z3562E00 Page 5 of 20
3 INTRODUCTION
Thank you for purchasing the KBVF 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 KBVF is manufactured with surface mount components
incorporating advanced circuitry and technology. The Finger-Safe Cover is included for added liability protection.
The KBVF Adjustable Frequency Drives provide variable speed control for standard 3-phase and Permanent Split Capacitor (PSC) AC
induction motors from subfractional thru 1½ HP. This manual covers models with single-phase AC line input only. 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 KBVF is easy to install and operate. Tailoring to specific 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. 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.
1
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 startup of high frictional loads. Electronic Inrush Current Limit (EICL™) eliminates harmful AC line inrush
current.
2
The drive is suitable for machine or variable torque (HVAC) applications. With optional Drive-Link™ software, the drive can be
programmed for DC Injection Braking.
For AC line and motor wiring, quick-connect terminals are provided. Other features include: adjustable trimpots (MIN, MAX, ACC,
DEC/B
3
, COMP CL), customer selectable jumpers (Line Voltage (dual voltage models only), Automatic-Manual Start, Motor Frequency,
Frequency Multiplier, Forward/Reverse). Diagnostic LEDs are provided for power (PWR) and drive status (ST). A 5 k
<
Main Speed
Potentiometer is also included.
A Signal Isolator is optional on all models, which can be used for single-ended or bidirectional speed control and accepts voltage or
current signal input. Other optional accessories include: Class "A" and "B" AC Line Filters, Dynamic Brake Module, Multi-Speed Board,
Programming Kit, and Modbus Communication Module. A connector is provided for easy installation of accessories.
Notes: 1. UL approved as an electronic overload protector for motors. 2. Models KBVF-21D, 22D contain ICL in lieu of EICL™. 3. In 50 Hz Mode, the DEC/B
Trimpot automatically becomes Adjustable Boost.
3.1 Standard Features
=
Simple to Operate: Does not require programming. Uses trimpots and jumpers, which are factory set for most applications.
=
Diagnostic LEDs: Power on (PWR) and drive status (ST). See Section 12, on page XX.
=
Jumper Selection of Drive Output Frequency: Increases the motor speed up to two times the rated RPM. See Section 6, on
page XX
.
=
Compatible with GFCIs (optional software required).
=
Industry Standard Mounting. See Section 7, on page XX.
=
Finger-Safe Cover: Meets IP-20 standard. See Section 5, on page XX.
3.2 Performance Features
=
Power Start™: Provides more than 200% starting torque which ensures startup of high frictional loads.
=
Slip Compensation with Static Auto-Tune and Boost: Provides excellent load regulation over a wide speed range.
=
Speed Range: 60:1
3.3 Protection Features
=
Motor Overload (I
2
t) with RMS Current Limit: Provides motor overload protection which prevents motor burnout and eliminates
nuisance trips. UL approved as an electronic overload protector for motors. See
Section 4.2, on page, XX and Section 13.7, on
page XX.
=
Electronic Inrush Current Limit (EICL™): Eliminates harmful inrush AC line current during startup. Models KBVF-21D, 22D
contain ICL in lieu of EICL™.
=
Short Circuit: Prevents drive failure if a short circuit occurs at the motor (phase-to-phase).
=
Motor Filter: Reduces harmful voltage spikes to the motor.
=
Regeneration: Eliminates nuisance tripping due to bus overvoltage caused by rapid deceleration of high inertial loads.
=
Undervoltage and Overvoltage: Shuts down the drive if the AC line input voltage goes above or below the operating range.
=
MOV Input Transient Suppression.
=
Microcontroller Self Monitoring and Auto-Reboot.
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