KB Electronics KBVF-48 - Manual (Page 9)

3 INTRODUCTION
Thank you for purchasing the KBVF 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
KBVF is manufactured with surface mount components incorporating advanced circuitry and technology. A
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) 1 AC induction motors from 2 thru 5 HP. This manual covers models with single-phase
and 3-phase AC line input. 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 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. 2 In addition,
Adjustable Slip Compensation with Static Auto-Tune and Boost provides high torque and excellent load reg-
ulation 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. 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, a barrier terminal block is provided. Other features include: adjustable trimpots
(MIN, MAX, ACC, DEC/B 3 , COMP, CL), customer selectable jumpers (Automatic-Manual Start, Motor
Frequency, Frequency Multiplier, Forward/Reverse). Diagnostic LEDs are provided for power (PWR) and
drive status (ST). A 5 kΩ Main Speed Potentiometer is also included.
A Signal Isolator (built-in on Models KBVF-45,48 and optional on Models KBVF-27, 29) can be used for
unidirectional or bidirectional speed control and accepts voltage and current signal input. Other optional
accessories include: Multi-Speed Board, Programming Kit, and Modbus Communication Module. A connec-
tor is provided for easy installation of accessories.
Notes: 1. Optional software is required for PSC motors – contact our Sales Department. 2. UL approved as
an electronic overload protector for motors. 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 22 and 23.
• Jumper Selection of Drive Output Frequency – Increases the motor speed up to two times the
rated RPM. See Section 6, on page 14 and 15.
• Industry Standard Mounting – See Section 7, on page 15 and 16.
• Finger-Safe Cover – Meets IP-20 standard. See Section 5, on page 14.
• Models KBVF-29, 48 contain a built-in cooling fan.
Note: GFCI Operation – This drive can operate with GFCIs (optional software required) – contact our
Sales Department.
9
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 (SIVFR (Part No. 9597)).