Kb Electronics IP-20 User Manual

Installation & Operation Manual

A Complete Line of Motor Drives

L3

W

L1

AC LINE

L2

VUTB1

MOTOR

50/60HzJ2

CON3

CON1

J1

X1 X2

A/M

CL MAX MIN ACC COMPDEC/B

KBVF SERIES

Chassis / IP-20 AC Drives

Variable Speed/ Soft-Start AC Motor Drive

with Electronic Motor Overload Protection*

Rated for 208-230 and 400/460 Volt 50 & 60 Hz

3-Phase & PSC** AC Induction Motors from 2 thru 5 HP

Operates from 208/230 Volt and 400/460 Volt 50/60 Hz AC Line Input***

This Manual Covers Models KBVF-27, 29, 45, 48

See Safety W

arning,

on page 8.

The information contained in this manual is intended to be accurate. However, the manufacturer retains

the right to make changes in design which may not be included herein.

*UL approved as an electronic overload protector for motors. **Custom software is required for PSC motors.
See PSC Motor Addendum (Part No. A42142). ***Do not use this drive with GFCIs. Special software is available –
contact our Sales Department. ****Installation of a CE approved RFI filter is required.

Note: The drive is factory set for

****

60 Hz motors. For 50 Hz motors,
see Section 6.1, on page 14.

© 2006 KB Electronics, Inc.

(see back cover)

BLE OF CONTENTS

ection Page

S

Quick-Start Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1

2 Safety Warning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Important Application Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5 Finger-Safe Cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6 Setting Selectable Jumpers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

7 Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

8 Recommended High Voltage Dielectric Withstand Testing (Hi-Pot Testing) . . . . . . . . . . . . . . . . . . . . . . . . . 16

Wiring Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

9

10 AC Line Fusing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1 Drive Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

1

12 Diagnostic LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

13 Trimpot Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Limited Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Tables Page

1 General Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

2 Electrical Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

3 Terminal Block Wiring Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

4 Drive Operating Condition and Run/Fault Relay Contact Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

5 Fault Recovery and Resetting the Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

6 Drive Operating Condition and Status LED Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figures Page

1 Models KBVF-27, 29 Quick-Start Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

2 Models KBVF-45, 48 Quick-Start Connection Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

3 SIVFR Control Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

4 Mechanical Specifications and Control Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5 Expanded View of Jumpers and Trimpots . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

6 Maximum Allowed Motor Torque vs. Speed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7 Open Ventilated Motor with External Cooling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

8 60 Hz and 50 Hz Motor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

9 Available Torque vs. Output Frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

10 120 Hz and 100 Hz Drive Output Frequency Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

11 Automatic Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

12 Models KBVF-27, 29 Forward/Reverse Speed Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

13 Typical Hi-Pot Test Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

14 AC Line Input, Motor, and Ground Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

15 Models KBVF-27, 29 Main Speed Potentiometer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

16 Unidirectional Main Speed Potentiometer and Forward-Stop-Reverse Switch Connections . . . . . . . . . . . . 18

17 Bidirectional Main Speed Potentiometer Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

18 Models KBVF-27, 29 Voltage Following Signal Input Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

19 Models KBVF-45, 48 Voltage Following Signal Input Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

20 Models KBVF-45, 48 Current Following Signal Input Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

21 Manual Start Switch Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

22

23 Form “C” Contact or Relay Forward-Stop-Reverse Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

24 Open Collector Forward-Stop-Reverse Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

25 Enable Switch Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

26 Run/Fault Relay Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

27 Run/Fault Relay Output Contact Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

28 Models KBVF-27, 29 Minimum Speed Trimpot (MIN) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23

d-Stop-Reverse Switch Connection

Forwar

TA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20

ii

BLE OF CONTENTS(Continued)

igures Page

F

9 SIVFR Offset Trimpot (OFFSET) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

2

30 Models KBVF-27, 29 Maximum Speed Trimpot (MAX) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

31 Models KBVF-45, 48 Maximum Speed Trimpot (MAX) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

32 Acceleration Trimpot (ACC) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

33 Deceleration Trimpot (DEC/B) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

34 Slip Compensation Trimpot (COMP) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

35 Boost Trimpot (DEC/B) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

36 Model KBVF-27 Current Limit Trimpot (CL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

7 Model KBVF-29 Current Limit Trimpot (CL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

3

38 Model KBVF-45 Current Limit Trimpot (CL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

9 Model KBVF-48 Current Limit Trimpot (CL) Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

3

Items Included in this Package:

KBVF Adjustable Frequency Drive, KBVF Series Installation and Operation Manual, Main Speed Potentiometer
Kit with Insulator and Mounting Hardware, 3 Main Speed Potentiometer Quick-Connect Terminals, 2-Wire and
3-Wire Connector Kit (Models KBVF-27, 29 Only), Status Indicator Label, Trimpot Adjustment Tool, CE
Approved Product Information Card, Warranty Registration Card.

TA

iii

C

ON1

C

ON2

C

ON3

X

1X2

J2

A

/M

F - S - R

PWR

S

T

P3P2

J

1

P1

50/60Hz

MAXCL ACCMIN DEC/B COMP

Main Speed Potentiometer (5 k)

see Section 9.4, on page 18.

(Supplied) (Front View):

Adjustable Trimpots:

see Section 13, on pages 23 – 26.

Motor Connection:

see Section 9.1, on page 17.

(Model KBVF-27 Only):

Single-Phase Connection

see Section 9.2, on page 17.

see Section 9.3, on page 18.

Ground (Earth):

Forward/Reverse Speed Selection:

see Section 9.7, on page 20.

see Section 9.8, on pages 20 and 21.

Enable Switch Connection,

Forward-Stop-Reverse Switch Connection:

see Section 6.3, on page 15.

for Accessories and Programming:

see Section 3.5, on page 10.

Communication Port

(Models KBVF-27, 29):

3-Phase Connection

see Section 9.1, on page 17.

(Use L1, L2, L3)

(Use L1, L2)

see Section 6.1.2, on page 15.

see Section 6.1.1, on page 14.

For 60 Hz or 50 Hz Motor Operation:

the Rated Motor RPM:

For Two Times

Automatic Start:

Manual Start Switch Connection:

see Section 9.6, on page 20.

see Section 6.2, on page 15.

Voltage Following Signal Input

see Section 9.5, on page 19.

in Lieu of Main Speed Potentiometer:

see Section 12, on pages 22 and 34.

Diagnostic LEDs:

High

Wiper

Low

Motor

L3

LINE

W

MOTOR

U

L2

AC

L1

VTB1

(Shown without Finger-Safe Cover Installed)

FIGURE 1 – MODELS KBVF-27, 29 QUICK-START CONNECTION DIAGRAM

4

Ground (Earth):

Motor Connection:

see Section 9.2, on page 17.

see Section 9.3, on page 18.

3-Phase Connection:

AC Line

Motor

L3

W

L1

AC LINE

L2

VUTB1

MOTOR

50/60HzJ2

CON3

C

ON1

J1

X

1 X2

A/M

CL MAX MIN ACC COMPDEC/B

TB1

TB2

see Section 9.1, on page 17.

(Isolated Inputs)

Main Speed Potentiometer (Supplied),

Run/Fault Relay Output Contacts:

(Located Under Ribbon Cable)

Signal Input, and Direction Switch

or Contact Connections:

see Section 12, on page 22.

see Section 13, on page 23.

Adjustable Trimpots:

Diagnostic LEDs

see Section 9.9, on page 21.

see Sections 9.4.2, 9.5, and 9.7.2

on pages 18 – 20.

see Section 9.6, on page 20.

See Section 6.2, on page 15.

Manual Start Switch Connection:

Automatic Start:

see Section 6.1.2, on page 15.

For Two Times the Rated Motor RPM:

see Section 6.1.1, on page 14.

For 60 Hz or 50 Hz Motor Operation:Communication Port

see Section 3.5, on page 7.

for Accessories and Programming:

(Shown without Finger-Safe Cover Installed)

FIGURE 2 – MODELS KBVF-45, 48 QUICK-START CONNECTION DIAGRAM

5

Signal Input, Direction Switch, and Main Speed Potentiometer connections.

Sets the drive for operation with a voltage or current input signal.

Sets the Run/Fault Relay Output Contacts for normally open or closed operation.

All jumpers are shown in factory set positions.

Run/Fault Relay Output Contacts connection.

Sets the operation of the Run/Fault Relay to Run or Fault.

Used to connect the Signal Isolator and Run/Fault Relay to the KBVF.

Sets the drive for operation with the optional Dynamic Brake Module.

MAXOFFSET

NDBM

J5

DBM

CON1

RUN

J4

FAULT

Power on LED.

Maximum Speed adjustment trimpot.

Signal Offset adjustment trimpot.

OV

PWR

TB1

-5V+5V FWD REV COM1SIG1

VOLTCUR

TB2

K1 K2

NC

J2J1

NO

FIGURE 3 – SIVFR CONTROL LAYOUT

(SIVFR is Built-In on Models KBVF-45, 48 and Optional on Models KBVF-27, 29)

6

QUICK-START INSTRUCTIONS

1

Important – You must read these simplified instructions before proceeding. These instructions are to be

used as a reference only and are not intended to replace the details provided herein. You must read the
Safety Warning on, page 8, before proceeding.

See Figures 1 – 3, on pages 4 – 6. Also see Section 4 — Important Application Information, on

pages 13 and 14.

WARNING! Disconnect main power when making connections to the drive.

.1 AC LINE CONNECTION –

1

or single-phase (Terminals “L1”, “L2”) or 3-phase (Terminals “L1”, “L2”, “L3”) AC line input. Models

f

BVF-29, 45, 48 are designed for 3-phase (Terminals “L1”, “L2”, “L3”) AC line input only. See Figures

K

ire the AC line input to Terminal Block TB1. Model KBVF-27 is designed

W

1 and 2, on pages 4 and 5. Also see Section 9.1, on page 17.

Application Note – Do not wire this drive to a GFCI. If operation with a GFCI is required,
contact our Sales Department.

Model KBVF-27 –

Rated for 208/230 Volt single-phase or 3-phase AC line Input.

Model KBVF-29 – Rated for 208/230 Volt 3-phase AC line input.

Models KBVF-45, 48 – Rated for 400/460 Volt 3-phase AC line input.

1.2 GROUND CONNECTION – Connect the ground wire (earth) to the ground screw, as shown in

Figures 1 and 2, on pages 4 and 5. See Section 9.2, on page 17.

1.3 AC LINE FUSING – It is recommended that a fuse(s) or circuit breaker be installed in the AC line.

Fuse each conductor that is not at ground potential. For the recommended fuse size, see Table 2, on
page 11. Also see Section 10, on page 22.

1.4 MOTOR CONNECTION – Wire the motor to Terminals “U”, “V”, “W”, of Terminal Block TB1, as

shown in Figures 1 and 2, on pages 4 and 5. (Special reactors may be required for cable lengths over
100 ft. (30 m) – consult our Sales Department.) See Section 9.3, on page 18.

Note: The drive is programmed to operate 3-phase AC induction motors. For PSC motors, optional
software is required – consult our Sales Department.

1.5 MOUNTING INSTRUCTIONS – See Section 7, on page 15 and 16.

1.6 60 Hz & 50 Hz MOTOR OPERATION (JUMPERS J1 & J2 ON THE LOWER PC BOARD) – The

drive is factory set for 60 Hz motor operation (Jumper J1 set to the “60Hz” position and Jumper J2
set to the “X1” position). For 50 Hz motor operation, set Jumper J1 to the “50Hz” position and be
sure Jumper J2 is set to the “X1” position. See Section 6.1.1, on page 14.

1.7 TRIMPOT SETTINGS – All trimpots have been factory set for most applications, as shown in Figure

5, on page 13. Some applications require adjustments of the trimpots in order to tailor the drive for a
specific requirement. See Section 13, on pages 23 – 26.

1.8 MAIN SPEED POTENTIOMETER CONNECTION – The drive is supplied with a 5 kΩ potentiometer

(supplied) to control motor speed. On Models KBVF-27, 29, the potentiometer is to be connected to
terminals “P1”, “P2”, and “P3”. On Models KBVF-45, 48, the potentiometer is to be connected to the
SIVFR.

Models KBVF-27, 29
Unidirectional Speed Operation – Wire the potentiometer to Terminals “P1” (low), “P2” (wiper), “P3”

(high), as described in Section 9.4.1, on page 18. T

o select forwar

everse motor dir

d or r

ection, see

Section 6.3, on page 15. To install a Forward-Stop-Reverse Switch, see Section 9.7.1, on page 20.

Bidirectional Speed Operation – See Section 9.4.2, on page 18.

7

odels KBVF-45, 48

M

nidirectional Speed Operation –Wire the potentiometer to Terminals “+5V” (high), “SIG1” (wiper),

U

COM1” (low), of Terminal Block TB1 on the SIVFR, as described in Section 9.4.2, on page 18. Be

“
sure Jumper J1, on the SIVFR, is set to the “VOLT” position (factory setting). A jumper must be
installed between Terminals “0V” and “FWD”, of Terminal Block TB1, in order for the drive to operate.

idirectional Speed Operation –Wire the potentiometer to Terminals “+5V” (high), “SIG1” (wiper),

B

“– 5V” (low), of Terminal Block TB1 on the SIVFR, as described in Section 9.4.2, on page 18. Be sure
Jumper J1 (on the SIVFR) is set to the “VOLT” position (factory setting).

1.9 SIGNAL FOLLOWING – An analog signal input can be used to control motor speed instead of the

Main Speed Potentiometer. The drive output will linearly follow the analog signal input. A Signal

solator (SIVFR) is built-in on Models KBVF-45,48 and optional on Models KBVF-27, 29.

I

Models KBVF-27, 29

Wire the isolated* 0 – 5 Volt DC signal input positive lead (+) to Terminal “P2” and the negative lead (–)
to Terminal “P1”. See Section 9.5, on page 19.

*If a non-isolated signal is used, install the SIVFR Signal Isolator (Part No. 9597). The SIVFR accepts voltage (0 to ±2.5

thru 0 to ±25 Volts DC) or current (4 – 20 mA DC) signal inputs. See Section 3.5, on page 10.

Note: For signal following operation, the Minimum Speed Trimpot (MIN) must be set fully counter­clockwise.

WARNING! The signal input must be isolated from the AC line. Earth grounding signal

wiring will damage the drive and void the warranty. It is highly recommended that the
SIVFR – Signal Isolator and Run/Fault Relay (Part No. 9597) be installed when using signal
following.

Models KBVF-45, 48

Wire the voltage (0 to ±2.5 thru 0 to ±25 Volt DC) or current (4 – 20 mA DC) signal input to Terminals
“SIG1” (+) and “COM1” (–) of Terminal Block TB1 on the SIVFR. For voltage following, be sure Jumper
J1 (on the SIVFR) is set to the “VOLT” position (factory setting). For current following, set Jumper J1
(on the SIVFR) to the “CUR” position. A jumper must be installed between Terminals “0V” and “FWD”,
of Terminal Block TB1, in order for the drive to operate.

2 SAFETY WARNING

Definition 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 should be installed and serviced by a qualified technician, electrician, or elec-

trical maintenance person familiar with its operation and the hazards involved. Proper instal-

lation, which includes installation of the Finger-Safe Cover, wiring, mounting in proper enclosure, fusing

or other current protection, and grounding can reduce the chance of electrical shocks, fires, or explo-

sion in this product or products used with this product, such as electric motors, switches, coils, sole-

noids, and/or relays. 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, sili-

con, etc.) which may be a potential hazar

educe the emission of radio fr

can r

electronic equipment. It is the responsibility of the equipment manufacturer and individual installer to

supply this Safety W

all instructions carefully. Fire and/or electrocution can result due to improper use of this product.

ning to the ultimate end user of this pr

ar

equency interference (RFI) which may adversely affect sensitive

oper shielding, gr

d. Pr

ounding, and filtering of this pr

oduct. (SW/FSC 5/2005) Be sur

oduct

e to follow

8

his product complies with all CE directives pertinent at the time of manufacture. Contact our Sales

T

epartment for Declaration of Conformity. Installation of a CE approved RFI filter is required. See RFI

D

ilters & Chokes Selection Guide D-321 (Part No. A42027) for selection of filters to meet the Industrial or

F

esidential Standard. Additional shielded cable and/or AC line cables may be required along with a signal

R

solator (SIVFR (Part No. 9597)).

i

3 INTRODUCTION

Thank you for purchasing the KBVF Adjustable Frequency Drive. KB Electronics, Inc. is committed to pro-

iding total customer satisfaction by producing quality products that are easy to install and operate. The

v
KBVF is manufactured with surface mount components incorporating advanced circuitry and technology. A

inger-Safe Cover is included for added liability protection.

F

he KBVF Adjustable Frequency Drives provide variable speed control for standard 3-phase and Permanent

T
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 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.

2

Main features include adjustable RMS Current Limit and I

t Motor Overload Protection.2In 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. 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 k

Ω 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 connec­tor 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

.2 PERFORMANCE FEATURES

3

ower Start™ – Provides more than 200% starting torque which ensures startup of high

• P

rictional loads.

f

•

lip Compensation with Static Auto-Tune and Boost –Provides excellent load regulation over a

S

ide speed range.

w

•

peed Range –60:1

S

.3 PROTECTION FEATURES

3

Motor Overload (I

•

otor burnout and eliminates nuisance trips. UL approved as an electronic overload protector for

m

otors. See Section 4.2, on pages 13 and 14. Also see Section 13.7, on pages 25 and 26.

m

Electronic Inrush Current Limit (EICL™) –Eliminates harmful inrush AC line current during startup.

•

2

) with RMS Current Limit –Provides motor overload protection which prevents

t

• Short Circuit – Prevents drive failure if a short circuit occurs at the motor (phase-to-phase).

• Regeneration – Eliminates nuisance tripping due to high bus overvoltage caused by rapid decelera-

tion 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.

3.4 TRIMPOT ADJUSTMENTS

• Minimum Speed (MIN on Models KBVF-27, 29 and OFFSET on SIVFR of Models KBVF-45, 48)

Sets the minimum speed of the motor. See Section 13.1, on page 23.

• Maximum Speed (MAX) – Sets the maximum speed of the motor. See Section 13.2, on page 23.

• Acceleration (ACC) – Sets the amount of time for the motor to accelerate from zero speed to full

speed. See Section 13.3, on page 24.

• Deceleration (DEC/B) – Sets the amount of time for the motor to decelerate from full speed to zero
speed. See Section 13.4, on page 24.

• Slip Compensation (COMP) – Maintains set motor speed under varying loads. See Section 13.5,
on page 24.

• Boost (DEC/B) – In 50 Hz mode, the trimpot automatically becomes Adjustable Boost, which can
be used to set the Volts/Hz Curve for 50 Hz motors to obtain maximum performance. In 50 Hz
Mode, the deceleration time is automatically set to the same as the acceleration time. See Section

13.6, on page 25.

• Current Limit (CL) – Sets the current limit (overload) which limits the maximum current (torque) to
the motor. See Section 13.7, on pages 25 and 26.

3.5 OPTIONAL ACCESSORIES

• SIVFR – Signal Isolator and Run/Fault Relay (Part No. 9597) –

non-isolated signal voltage (0 to ±2.5 thru 0 to ±25 Volts DC) or current source (4 – 20 mA DC) and
the drive. Can be used in unidirectional or in bidirectional mode. Run/Fault Relay Output Contacts

ovided, which can be used to tur

e also pr

ar
is put into the Stop Mode or a fault has occurr
built-in on models KBVF-45, 48.

• Multi-Speed Board (Part No. 9503) – Provides multi-speed operation using external contacts or a
PLC. Mounts on the end of the drive. For Models KBVF-27, 29 only. Also available factory installed
on Models KBVF-45, 48 – contact our Sales Department.

• Programming Kit (Part No. 9582) – Includes DownLoad Module™ (DLM) handheld programming
device which uploads and downloads drive programs, PC to DLM serial communication cable, DLM

10

to inverter communication cable, and PC Windows® based Drive-Link™ communication software.

Provides isolation between a

f equipment or to signal a warning if the drive

n on or of

ed. Mounts on the end of the drive. This option is

DIVF – Modbus Communication Module (Part No. 9568) –Allows the drive to communicate with

•

LCs, PCs, and HMIs with Modbus RTU protocol utilizing a serial communication cable. If a USB

P

ommunication cable is required, purchase Part No. 19008.

c

• Custom Software – All models can be factory programmed for applications which require special
switching, timing, PLC functions, and GFCI operation – contact our Sales Department.

TABLE 1 – GENERAL PERFORMANCE SPECIFICATIONS

Factory

Description Specification

208/230 Volt AC Line Input Voltage Operating Range (Volts AC) 208 (–15%) / 230 (+15%) —

400/460 Volt AC Line Input Voltage Operating Range (Volts AC) 380 (–15%) – 460 (+15%) —

Maximum Load (% Current Overload for 2 Minutes) 150 —

arrier, Switching Frequency (kHz)

C

Signal Following Input Voltage Range1(Volts DC)

Signal Following Input Current Range1(mA DC)

BVF-27, 29

K

BVF-45, 48

K

6, 8

1

– 5

0

to ±2.5 thru 0 to ±250to ±5

0

– 20

4

Output Frequency Resolution (Bits, Hz) 10, .06 —

Minimum Speed Trimpot (MIN) Range (% Frequency Setting) 0 – 40 0

Maximum Speed Trimpot (MAX) Range (% Frequency Setting) 70 – 110 100

Acceleration Trimpot (ACC) and Deceleration Trimpot (DEC/B) Range (Seconds) .3 – 20 1.5

Boost Trimpot (DEC/B) Range (50 Hz Only) (Volts/Hz) 0 – 30 5

Slip Compensation Trimpot (COMP) Range at Drive Rating (Volts/Hz) 0 – 3 1.5

KBVF-27 4.0 – 12.5 10.7

Current Limit Trimpot (CL) Range (Amps AC)

KBVF-29 5.5 – 17.0 14.4

KBVF-45 3.0 – 8.5 7.4

KBVF-48 5.0 – 15.5 13.3

Motor Frequency Setting (Hz) (Jumper J1) 50, 60 60

Output Frequency Multiplier (X1, X2) (Jumper J2)

2

1, 2 1

Minimum Operating Frequency at Motor (Hz) 1 —

Speed Range (Ratio) 60:1 —

Speed Regulation (30:1 Speed Range, 0 – Full Load) (% Base Speed)

Overload Protector Trip Time for Stalled Motor (Seconds) 6 —

AC Line Input Undervoltage/Overvoltage Trip Points for 208/230 Volt AC Line (±5%) (Volts AC)

AC Line Input Undervoltage/Overvoltage Trip Points for 400/460 Volt AC Line (±5%) (Volts AC)

Run/Fault Relay Output Contacts Rating5(Amps at 30 Volts DC, 125 Volts AC, 250 Volts DC)

3

4

4

2.5 —

151 – 282 —

302 – 567 —

1, 0.5, 0.25 —

Operating Temperature Range (°C / °F) 0 – 45 / 32 – 113 —

Notes: 1. Models KBVF-27, 29: if a non-isolated signal is used, or if using 0 to ±2.5 thru 0 to ±25 Volts DC or 4 – 20 mA DC signal input, install the
SIVFR Signal Isolator (Part No. 9597). Models KBVF-45, 48: contain built-in signal isolation. 2. Allows the motor to operate up to two times the rated
RPM. Constant motor horsepower will result when operating the drive in the “X2” mode above the motor rated frequency.

3. Dependent on motor per-

formance. 4. Do not operate the drive outside the specified AC line input voltage operating range. 5. Models KBVF-45, 48 only.

Setting

—

—

—

TABLE 2 – ELECTRICAL RATINGS

AC Line Input Drive Output

Part

Volts AC

.

Model

No

(50/60 Hz)

KBVF-27 9591 208/230

1

9593 208/230 3 10.8 0 – 230 9.0 3 (2.25) 15 4.6 2.1

9

KBVF-2

2

9590 400/460 3 5.3 0 – 400/460 4.6 3 (2.25) 10 4.1 1.9

5

KBVF-4

2

1,

KBVF-48

9592 400/460 3 9.6 0 – 400/460 8.3 5 (3.75) 15 4.6 2.1

Maximum

Phase

Current

(φ)

(Amps

1 17.0

3 8.0 10

Voltage

Range

(Nominal)

AC)

olts

(V

0 – 230 6.7 2 (1.5)

AC)

Maximum

Continuous

Load Current

Amps/Phase)

(RMS

Maximum

Horsepower

(HP (kW))

Notes: 1. Models KBVF-29, 48 contain built-in cooling fan. 2. Models KBVF-45, 48 are rated 0 – 400 Volts AC for 50 Hz motor operation and 0 – 460

AC for 60 Hz motor operation.

olts

V

*All models contain a Terminal Block for AC line and motor wiring. The Signal Isolator and Run/Fault Relay is standard on Models KBVF-45, 48
and optional on Models KBVF-27, 29.

Fuse or

Circuit

Breaker

Rating

(Amps)

20

Net Wt.

lbs kg

4.1 1.9

11

built-in cooling fan on this end

31.8

12.7

0.5

(8 Places)

5.1

0.2

(Models KBVF-45, 48)

217

Models KBVF-29, 48 contain a

76.2

1.25

3.00

178

(Models KBVF-27, 29)

191

7.00

7.50

8.55

(optional on models KBVF-27, 29)

is standard on models KBVF-45, 48

Signal Isolator and Run/Fault Relay

4.00

102

119

99.0

3.90

4.70

built-in cooling fan

Models KBVF-29, 48 contain a

113113

KBVF-27: KBVF-29:

110110

KBVF-45: KBVF-48:

4.35 4.35

Maximum Height

4.45 4.45

4.15

105

See

Chart

L3

W

L1

AC LINE

L2

VUTB1

MOTOR

50/60HzJ2

CON3

C

ON1

J1

X1 X2

A

/M

CLMAXM

IN

ACCC

OMPDEC/B

TB1

TB2

(SEE FIGURE 5, ON PAGE 13, FOR EXPANDED VIEW OF JUMPERS AND TRIMPOTS)

FIGURE 4 – MECHANICAL SPECIFICATIONS (INCHES/mm) & CONTROL LAYOUT

12

(TOP VIEW SHOWN WITHOUT FINGER-SAFE COVER INSTALLED) (SIDE VIEW SHOWN WITH FINGER-SAFE COVER INSTALLED)

IMPORTANT APPLICATION INFORMATION

60

Motor Speed (%)

TEFC and Open Ventilated

50304010020

Motors

Maximum Allowed

Motor Torque (%)

40

20

60

0

and TENV

Inverter Duty

100

80

100907080

Motors

Fan Cooled

Selectable Jumpers

A/M

CON2

CON1

J2 50/60Hz

CON3

J1X2X1

P1

F - S - R

PWR

P3P2

ST

D

iagnostic LEDs

Main Speed Potentiometer

and Signal Input Terminals

MINCL MAX ACCDEC/B COMP

Adjustable Trimpots

Open Ventilated Motor

(100 CFM Min.)

Fan or Blower

Airflow

4

.1 MOTOR WITH EXTERNAL FAN

4

OOLING –

C

ost totally enclosed fan-

M
cooled (TEFC) and open ventilated 3­phase AC induction motors will over­heat if used beyond a limited speed
range at full torque. Therefore, it is nec­essary to reduce motor load as speed
is decreased.

Note: Some fan-cooled motors can be

sed over a wider speed range.

u
Consult the motor manufacturer for
details.

WARNING! Some motors have

low speed characteristics which
cause overheating and winding failure
under light load or no load conditions.
If the motor is operated in this manner
for an extended period of time, it is
recommended that the unloaded motor
current be checked from 2 – 15 Hz (60
– 450 RPM) to ensure motor current
does not exceed the nameplate rating.

Do not use motor if the motor cur­rent exceeds the nameplate rating.

FIGURE 5 – EXPANDED VIEW OF JUMPERS AND TRIMPOTS

It is recommended that

FIGURE 6 – MAXIMUM ALLOWED MOTOR TORQUE vs. SPEED

the drive be used with
Inverter Duty or TENV motors.

Inverter duty and most totally
enclosed non-ventilated (TENV)
motors can provide full rated
torque over an extended speed
range without overheating. See
Figure 6.

If external fan cooling is provided,
open ventilated motors can also
achieve an extended speed range
at full rated torque. A box fan or

FIGURE 7 – OPEN VENTILATED MOTOR WITH EXTERNAL COOLING

blower with a minimum of 100
CFM per HP is recommended.
Mount the fan or blower so the
motor is surrounded by the air­flow. See Figure 7.

4.2 ELECTRONIC MOTOR
OVERLOAD PROTECTION –

The drive contains Modified I2t
Overload Protection.* Part of this
function consists of a Curr
Limit (CL) cir
drive curr

cuit, which limits the

ent to a factory pr

ent

eset

13

evel of 160% of the rated drive current. The CL Trimpot is used to recalibrate the drive current from

J2J150/60Hz

X1 X2J2J1

50/60Hz

X1 X2

l

0% thru 200%. The Power Start™ circuit provides an overshoot function that allows most motors to

6

evelop more than 200% of starting torque and breakdown torque.

d

2

tandard I

S

evelop and will turn the drive off after a short period of time. KB’s RMS Current Limit Circuit avoids

d

is undesirable because it causes nuisance tripping. It allows a very high motor current to

t

this nuisance tripping while providing maximum motor protection.

If the motor is overloaded to 120% of full load (75% of the CL setting), the I

2

t Timer starts. If the
motor continues to be overloaded at the 120% level, the timer will shut down the drive after 30 min­utes. If the motor is overloaded to 160% of full load, the drive will trip in 6 seconds.

L approved as an overload protector for motors.

*U

5 FINGER-SAFE COVER

The drive is designed with an IP-20 Finger-Safe Cover which provides protection against accidental contact
with high voltage.

WARNING! Disconnect main power when removing or installing the Finger-Safe Cover.

WARNING! To prevent accidental contact with high voltage, it is required that the Finger-Safe
Cover be properly installed onto the drive after all wiring and setup is complete. It offers

protection against electric shock which limits the potential liability to the equipment manufacturer
and installer.

5.1 REMOVING THE FINGER-SAFE COVER –

The Finger-Safe Cover will have to be removed before
wiring the drive or setting selectable jumpers. All trimpots can be readjusted with the Finger-Safe
Cover installed. Notice the orientation of the Finger-Safe Cover before removing it.

To remove the Finger-Safe Cover, gently lift up on the four retainer clips until the cover disengages
from the base.

Note: The Finger-Safe Cover is designed with a removable panel (on the trimpots side) which must be
removed for installation of optional accessories SIVFR Signal Isolator and Run/Fault Relay (Part No.

9597) or Multi-Speed Board (Part No. 9503). Complete instructions are provided with the accessories.

5.2 INSTALLING THE FINGER-SAFE COVER – To install the Finger-Safe Cover, be sure to properly align

the retainer clips. Gently push the Finger-Safe Cover onto the base until the retainer clips are fully
engaged with the base.

6 SETTING SELECTABLE JUMPERS

The drive has customer selectable jumpers
which must be set before the drive can be
used. For the location of jumpers, see Figure 5,
on page 13.

FIGURE 8 – 60 Hz & 50 Hz MOTOR SELECTION

60 Hz Motor Operation

(Factory Setting)

(J1 Installed in “60Hz” Position)

(J2 Installed in “X1” Position)

50 Hz Motor Operation

(J1 Installed in “50Hz” Position)

(J2 Installed in “X1” Position)

6.1 60HZ AND 50 HZ MOTOR OPERATION
AND DRIVE OUTPUT FREQUENCY
SELECTION (JUMPERS J1 AND J2) –

Both jumpers must be set for the appropri­ate motor nameplate frequency rating. Jumpers J1 and J2 are located on the lower PC board.

6.1.1 Setting the Drive for 60 Hz or 50 Hz Motor Operation – The drive is factory set to operate

60 Hz motors. Jumper J1 is factory set to the “60Hz” position and Jumper J2 is factory set to
the “X1” position. For 50 Hz motors, set Jumper J1 to the “50Hz” position and be sure Jumper
J2 is set to the “X1” position. See Figure 8.

14

.1.2 Setting the Drive for Two

50/60

Output Frequency (Hz)

% Torque

0

02

5

0

1

00

100/120

J2J150/60Hz

X1 X2J2J1

50/60Hz

X1 X2

A/M

CON1

F - S - R

CON2

F - S - R

CON2

6

imes the Rated Motor RPM –

T

he drive can also be used to

T
operate the motor up to two
times the rated RPM. However,
constant horsepower will result
when operating the drive in the
“X2” mode above the motor
rated frequency. See Figure 9.

For 120 Hz output with 60 Hz

otor, be sure Jumper J1 is set

m
to the “60Hz” position and set
Jumper J2 to the “X2” position.
For 100 Hz output with 50 Hz
motor, set Jumper J1 to the
“50Hz” position and set Jumper
J2 to the “X2” position. See
Figure 10.

FIGURE 9 – AVAILABLE TORQUE vs. OUTPUT FREQUENCY

6.2 AUTOMATIC START (CON1) – The
drive is factory set for Automatic Start
(jumper installed onto CON1), as shown
in Figure 11. CON1 is located on the
lower PC boar

d. The drive will automati

120 Hz Output with 60 Hz Motor

(J1 Installed in “60Hz” Position)

(J2 Installed in “X2” Position)

-

FIGURE 10 – 120 Hz & 100 Hz

DRIVE OUTPUT FREQUENCY SELECTION

100 Hz Output with 50 Hz Motor

(J1 Installed in “50Hz” Position)

(J2 Installed in “X2” Position)

cally start when power is applied and a
run command is given. The drive will
automatically restart after a recovered
fault due to undervoltage, overvoltage,
or short circuit.

2

t Trip, due to a prolonged overload, the drive must be

For an I
manually restarted. See Section 11.2, on page 22. Also see

FIGURE 11 – AUTOMATIC START

(Jumper Installed)

Section 12.2, on page 23.

For

Manual Start, a momentary contact must be installed onto

CON1, as described in Section 9.6, on page 20.

6.3 FORWARD/REVERSE SPEED
SELECTION –

Models KBVF-27, 29 are
factory set for Forward Speed Operation
(jumper installed in the “F-S” position of
CON2). For reverse Speed Operation, install

(Jumper Installed in

FIGURE 12 – MODELS KBVF-27, 29

FORWARD/REVERSE SPEED SELECTION

Forward Speed Operation

(Factory Setting)

“F” Position)

Reverse Speed Operation

(Jumper Installed in

“R” Position)

the jumper in the “R-S” position. CON2 is
located on the lower PC board. See Figure

12. See Section 9.7, on page 20.

Forward-Stop-Reverse Switch,

To wire a
or if installing the SIVFR Signal Isolator (built-in on Models KBVF-45, 48), see Section 9.7, on page 20.

7 MOUNTING INSTRUCTIONS

tur

WARNING! This drive must be mounted in an enclosure. Care should be taken to avoid

extreme hazardous locations where physical damage to the drive can occur due to mois-

e, metal chips, dust, and other contamination, including corr
ful. See Safety Warning on pages 8 and 9. To prevent accidental contact with high voltage, it is
required that the Finger-Safe Cover be properly installed onto the drive after all wiring and setup is
complete. Do not use this drive in an explosion pr

oof application.

osive atmosphere that may be harm-

15

he enclosure should be large enough to allow for proper heat dissipation so that the ambient temperature

12

30

AC KILOVOLTS

10mA

LEAKAGE

0mA

High Voltage Dielectric Withstand Tester (Hi-Pot Tester)

ZERO

MAX

VOLTAGETEST

RESETH. V.

RETURN

(Main Power Disconnected)

to AC Line Inputs

Connect Hi-Pot

AC Line Input

L1

L2

Chassis

Auxiliary Equipment

Chassis

Frame

Motor Wires

(Main Power Disconnected)

Connect All Drive Terminals Together

P3

Signal Inputs

P1

P2

W

L1

L2

U

V

L3

Adjustable Frequency Drive

Machine Equipment or Frame

T

oes not exceed 45 °C (113 °F). Leave enough room to allow for AC line, motor connection, and other

d

iring that is required. See Figure 4, on page 12.

w

hen mounting the Main Speed Potentiometer, be sure to install the insulating disc between the poten-

W

iometer and the panel.

t

odels KBVF-29, 48:

M

1. When mounting these drives in a vertical direction, the cooling fan must be on top.

2. When mounting the drive in an enclosure, be sure to leave at least 2” of clearance around the cooling

an for proper heat dissipation.

f

RECOMMENDED HIGH VOLTAGE DIELECTRIC WITHSTAND TESTING (HI-POT TESTING)

8

Testing agencies such as UL, CSA, etc., usually require that equipment undergo a hi-pot test. In order to
prevent catastrophic damage to the drive, which has been installed in the equipment, the following proce­dure is recommended. A typical hi-pot test setup is shown in Figure 13.

All drives have been factory

hi-pot tested in accordance with UL requirements.

Warning! All equipment AC line inputs must be disconnected from the AC power.

Connect all equipment AC power input lines together and connect them to the H.V. lead of the Hi-Pot

8.1

Tester. Connect the RETURN of the Hi-Pot Tester to the frame on which the drive and other auxiliary
equipment are mounted.

8.2 The Hi-Pot Tester must have an automatic ramp-up to the test voltage and an automatic ramp-down

to zero voltage.

Note: If the Hi-Pot Tester does not have automatic ramping, then the hi-pot output must be manually
increased to the test voltage and then manually reduced to zero. This procedure must be followed for
each machine being tested. A suggested Hi-Pot Tester is Slaughter Model 2550.

16

CAUTION! Instantly applying the hi-pot voltage will cause irreversible damage to the drive, which will
void the warranty.

FIGURE 13 – TYPICAL HI-POT TEST SETUP

WIRING INSTRUCTIONS

Ground (Earth):

see Section 9.2.

(Model KBVF-27 Only):

Single-Phase Connection

(Use L1, L2)

see Section 9.1.

see Section 9.3, on Page 18.

Motor Connection:

(Use L1, L2, L3)

see Section 9.1.

(Models KBVF-27, 29, 45, 48):

3-Phase Connection

L3

Motor

MOTOR AC LINE

L2L1

WTB1 VU

9

ARNING! Read Safety Warning, on pages 8 and 9, before using the drive. Disconnect

W

main power when making connections to the drive. To avoid electric shock, be sure to

properly ground the drive.

Application Note –

To avoid erratic operation, do not bundle the AC line and motor wires with each other
or with wires from signal following, start/stop contacts, or any other signal wires. Also, do not bundle motor
wires from multiple drives in the same conduit. Use shielded cables on all signal wiring over 12” (30 cm).
The shield should be earth grounded on the drive side only. Wire the drive in accordance with the National
Electrical Code requirements and other local codes that may apply.

Be sure to properly fuse each AC line conductor that is not at ground potential.

rounded conductors.

g

separate AC line switch or contactor must be wired as a disconnect so that each

A

Do not fuse neutral or

ungrounded conductor is opened. For fuse or circuit breaker selection, see Section 10, on page 22.

TABLE 3 – TERMINAL BLOCK WIRING INFORMATION*

erminal Block

T

Designation Description Location AWG

TB1 AC Line Input and Motor Wiring Upper PC Board 12 3.3 12 14

TB1**

TB2** Run/Fault Relay Output Contacts SIVFR*** 16 1.3 3.5 4

*Models KBVF-27, 29 contain quick-connect terminals for signal input. Connectors are provided for wiring of Direction Switch and Manual Start Switch.
**Models KBVF-45, 48 only. ***SIVFR – Signal Isolator and Run/Fault Relay is standard on Models KBVF-45, 48 and optional on Models KBVF-27, 29.

Signal Input, Direction Switch,
and Main Speed Potentiometer

SIVFR*** 16 1.3 3.5 4

9.1 AC LINE CONNECTION – Wire the

FIGURE 14 – AC LINE INPUT, MOTOR, AND GROUND CONNECTIONS

aximum Wire Size (Cu)Recommended Tightening Torque

M

2

m

m

in-lbs kg-cm

AC line input to Terminal Block TB1.
Model KBVF-27 is designed for
single-phase (Terminals “L1”, “L2”) or
3-phase (Terminals “L1”, “L2”, “L3”)
AC line input. Models KBVF-29, 45,
48 are designed for 3-phase
(Terminals “L1”, “L2”, “L3”) AC line
input only. See Figures 1 and 2, on
pages 4 and 5.

Application Note: GFCI Operation –
Do not connect this drive to an AC
power source controlled by a
Ground Fault Circuit Interrupter.
Special software is required for
GFCI operation – contact our Sales
Department.

Model KBVF-27 –

Volt single-phase or 3-phase AC line
Input.

Model KBVF-29 – Rated for 208/230
Volt 3-phase AC line input.

Models KBVF-45, 48 – Rated for
400/460 Volt 3-phase AC line input.

GROUND CONNECTION

9.2

screw is located on the heat sink. See Figure 14.

Rated for 208/230

–

Connect the gr

ound wir

e (earth) to the gr

een gr

ound scr

ew

. The gr

ound

17

.3 MOTOR CONNECTION –Wire the motor to

Wiper

L

ow

High

P

1

(

Supplied) (Front View)

M

ain Speed Potentiometer

P3P

2

REV

High

Stop

-5V

TB1

+5V 0V FWD

Forward

Wiper

Potentiometer

Main Speed

(5 k)

Low

Reverse

SIG1 COM1

SIVF

TERMINAL

BLOCK

CUR VOLT

J1

REV-5V

TB1

+5V 0V FWD SIG1 COM1

Main Speed

Potentiometer

Wiper

(5 k)

High

Jumper

Low

Jumper

CUR VOLT

J1

SIVF

TERMINAL

BLOCK

9

erminals “U”, “V”, “W”. The terminals are located

T

n the upper PC board. See Figure 14, on page

o

17. Motor cable length should not exceed 100 ft
(30 m) – special reactors may be required – con­sult our Sales Department.

Note: The drive is programmed to operate
3-phase AC induction motors. For PSC motors,
optional software is required – contact our Sales
Department.

9.4 MAIN SPEED POTENTIOMETER CONNECTION

–

The drive is supplied with a 5 kΩ Main Speed

Potentiometer to control motor speed.

WARNING! Do not earth
ground any Main Speed

Potentiometer terminals.

FIGURE 16 – UNIDIRECTIONAL MAIN SPEED POTENTIOMETER &

FORWARD-STOP-REVERSE SWITCH CONNECTIONS

Note: When mounting the Main
Speed Potentiometer, be sure to
install the insulating disc (supplied)
between the potentiometer and the
panel.

9.4.1 Models KBVF-27, 29 – Wire

the Main Speed
Potentiometer to Terminals
“P1” (low), “P2” (wiper), “P3”
(high). The terminals are locat­ed on the lower PC board.
See Figure 15.

If installing the SIVFR Signal
Isolator, see Section 9.4.2.

(TERMINALS “FWD”, “REV”, “COM1” HARDWIRED)

9.4.2 Models KBVF-45, 48 – Wire

the Main Speed
Potentiometer to Terminal
Block TB1 on the SIVFR.

FIGURE 15 – MODELS KBVF-27, 29

MAIN SPEED POTENTIOMETER CONNECTION

(UNIDIRECTIONAL OPERATION)

(JUMPER J1 INSTALLED IN “VOLT” POSITION)

FIGURE 17 – BIDIRECTIONAL

MAIN SPEED POTENTIOMETER CONNECTION

(JUMPER J1 INSTALLED IN “VOLT” POSITION)

For Unidirectional Speed
Operation: Wire the Main

Speed Potentiometer to
Terminals “+5V” (high), “SIG1”
(wiper), “COM1” (low). Motor
direction is selected with a
Forward-Stop-Reverse Switch wired to Terminals “0V” (common of switch), “FWD”, “REV”. See
Figure 16. If a Forward-Stop-Reverse Switch is not used, a jumper must be installed between

18

Terminals “0V” and “FWD”, of Terminal Block TB1, in order for the drive to operate.

For Bidirectional Speed Operation: Wire the Main Speed Potentiometer to Terminals “+5V”
(high), “SIG1” (wiper), “– 5V” (low). Terminals “FWD”, “REV”, “COM1” must be hard wired
together. See Figure 17.

.5 SIGNAL FOLLOWING CONNECTIONS – The

REV-5V

TB1

+5V 0V FWD SIG1 COM1

Jumper

0 to ±2.5 thru 0 to ±25

Volts DC

+

V

-

CUR VOLT

J1

SIVF

TERMINAL

BLOCK

REV-5V

TB1

+5V 0V FWD SIG1 COM1

Jumper

+

-

4 - 20 mA DC

CUR VOLT

J1

SIVF

TERMINAL

BLOCK

P1 P2 P3

0 - 5

Volts DC

+

-

V

P1 P2 P3

0 - 10

V

olts DC

V

+

-

1

0k

10k

CON1

A/M

Manual Start Switch

(Momentary Contacts)

(Push to Run)

White

Black

CON1

9

rive output will linearly follow the analog signal

d

nput.

i

odels KBVF-27, 29

M

ire the isolated*0– 5 Volt DC signal input pos-

W
itive lead (+) to Terminal “P2” and the negative
lead (–) to Terminal “P1”. The terminals are locat­ed on the lower PC board. With external circuitry,
a 0 – 10 Volt DC analog signal can also be used.
See Figure 18.

FIGURE 18 – MODELS KBVF-27, 29

VOLTAGE FOLLOWING SIGNAL INPUT CONNECTION

0 – 5 Volts DC (Isolated) 0 – 10 Volts DC (Isolated)

*If a non-isolated signal is used, install the
SIVFR Signal Isolator (Part No. 9597). The
SIVFR accepts voltage (0 to ±2.5 thru 0 to
±25 Volts DC) or current (4 – 20 mA DC)
signal inputs. See Section 3.5, on page 10.

Note: For signal following operation, the
Minimum Speed Trimpot (MIN) must be set
fully counterclockwise.

WARNING! The signal input must

be isolated from the AC line. Earth
grounding signal wiring will damage the
drive and void the warranty. It is recom­mended that the SIVFR – Signal Isolator
and Run/Fault Relay (Part No. 9597) be
installed when using signal following.

Models KBVF-45, 48

The SIVFR is factory calibrated for 0 to ±5
Volt DC signal input. Wire the voltage (0 to
±2.5 thru 0 to ±25 Volt DC) or current (4 –
20 mA DC) signal input to Terminals “SIG1”
(+) and “COM1” (–) of Terminal Block TB1
on the SIVFR. For voltage following, be
sure Jumper J1 (on the SIVFR) is set to the
“VOLT” position (factory setting). For cur­rent following, set Jumper J1 (on the
SIVFR) to the “CUR” position. See Figures
19 and 20. A jumper must be
installed between Terminals “0V”
and “FWD”, of Terminal Block
TB1, in order for the drive to

Jumper Removed

operate.

FIGURE 19 – MODELS KBVF-45, 48

VOLTAGE FOLLOWING SIGNAL INPUT CONNECTION

(0 to ±2.5 THRU 0 to ±25 VOLTS DC)

(JUMPER J1 INSTALLED IN “VOLT” POSITION)

FIGURE 20 – MODELS KBVF-45, 48

CURRENT FOLLOWING SIGNAL INPUT CONNECTION

(JUMPER J1 INSTALLED IN “CUR” POSITION)

FIGURE 21 – MANUAL ST

ART SWITCH CONNECTION

Connector Installed for

Manual Start Switch

Application Note – In the Voltage
Following Mode, the input will
accept a “+” and “–“ input volt­age, which will run the motor in
the forward and reverse direction.

Notes: 1. The MIN Trimpot on Models KBVF-45, 48 is not functional. Use the OFFSET Trimpot on
the SIVFR to offset the signal input, as described in Section 13.2.1, on page 23.
MAX Trimpot on Models KBVF-45, 48. Use the MAX Trimpot on the SIVFR to scale the signal input,
as described in Section 13.2.2.

2. Do not use the

19

.6 MANUAL START SWITCH

CON2

F - S - R

Forward-Stop-Reverse

Black
White

C

ON2

R

ed

S

top

Forward

R

everse

Switch

REV-5V

TB1

+5V 0V FWD SIG1 COM1

Forward Reverse

SIVF

TERMINAL

BLOCK

REV-5V

TB1

+5V 0V FWD SIG1 COM1

Forward Reverse

SIVF

TERMINAL

BLOCK

9

ONNECTION (CON1) –

C

anual Start Mode is used to

M

he

T

manually start the drive or restart
the drive (reset) if a fault has
occurred. To operate the drive in
the Manual Start Mode, remove
the factory installed jumper on
CON1 and install the 2-wire
connector (supplied). CON1 is

ocated on the lower PC board.

l
The connector must be wired to a

omentary switch or contact, as

m
shown in Figure 21, on page 19.

In the Manual Start Mode, the drive will trip
due to all faults (Overvoltage,
Undervoltage, Short Circuit, and I
remain tripped even when the fault is
cleared. To Start/Reset the drive, the
switch or contact must be manually
closed. Also, the drive must be restarted
each time the AC line is interrupted.

Automatic Start, see Section 6.2,

For
on page 15.

FIGURE 22 – FORWARD-STOP-REVERSE SWITCH CONNECTION

Jumper Removed

Connector Installed for

Forward-Stop-Reverse Switch

FIGURE 23 – FORM “C” CONTACT OR RELAY

FORWARD-STOP-REVERSE CONNECTION

2

t) and

Notes: 1. See Section 11.2, on page 22.
Also see Section 12.2, on page 23.
drive can be factory programmed for
Run/Stop operation with momentary con­tacts.

9.7 FORWARD-STOP-REVERSE SWITCH
CONNECTION (CON2) –

operate using a Forward-Stop-Reverse
Switch, Contact, or Open Collector.

9.7.1 Models KBVF-27, 29 – Remove

the factory installed jumper on
CON2 and install the 3-wire
connector (supplied). CON2 is located on the lower PC board. The connector must be wired to
a “maintained” switch or contact. See Figure 22. Also see Forward/Reverse Speed Selection, in
Section 6.3, on page 15.

If installing the SIFVR Signal Isolator, see Section 9.7.2.

Note: The drive can be factory programmed for momentary contact operation.

9.7.2 Models KBVF-45, 48 – Wire the Forward-Stop-Reverse Switch as shown in Figure 16, on

page 18. If using Form “C” Contact or Relay, wire the circuit as shown in Figure 23. If using
Open Collector, wire the circuit as shown in Figure 24.

9.8 ENABLE SWITCH CONNECTION (CON2) – The drive can be started and stopped with an Enable
Switch (close to run, open to stop). Remove the factory installed jumper on CON2 and install the 3­wire connector (supplied). CON2 is located on the lower PC board. The connector must be wired to a
“maintained” switch or contact. See Figure 25, on page 21.

20

The drive can

2. The

FIGURE 24 – OPEN COLLECTOR

FORWARD-STOP-REVERSE CONNECTION

orward Enable Operation, wire the switch to the white and black wires. ForReverse Enable

J2

NC NOJ2NC NO

K1 K2

TB2

Run/Fault Relay Output Contacts

CON2

F - S - R

(

Close to Run)

Red *

(Open to Stop)

Black
White

E

nable Switch

C

ON2

F

orward

(

Close to Run)

Red

(

Open to Stop)

Black
White*

E

nable Switch

CON2

Reverse

F

or

F

O

W

wire the switch to the red and black wires. When the switch is closed, the drive will run.

peration

,

hen the switch is opened, the drive will stop.

FIGURE 25 – ENABLE SWITCH CONNECTION

Jumper Removed

*For Forward Enable Switch connection, the red wire is not used. For Reverse Enable Switch connection, the white

wire is not used. The unused wire must be insulated or it may be cut off at the connector.

Connector Installed for

Forward Enable Switch

Connector Installed for
Reverse Enable Switch

9.9 RUN/FAULT RELAY
–

The Run/Fault
Relay is built-in on
Models KBVF-45, 48
and optional on
Models KBVF-27,

29. The Run/Fault

RUN/FAULT RELAY CONNECTION

FIGURE 26

FIGURE 27 – RUN/FAULT RELAY

OUTPUT CONTACT SELECTION

Normally Open Contacts Normally Closed Contacts

Jumper J2 Installed in

“NO” Position

(Factory Setting)

Jumper J2 Installed in

“NC” Position

Relay Output
Contacts are located
at TB2 of the SIVFR
and 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. See Figure 26.

For normally open contacts, set Jumper J2 (on the SIVFR) to the “NO” position. For normally closed
contacts, set Jumper J2 (on the SIVFR) to the “NC” position. See Figure 27.

TABLE 4 – DRIVE OPERATING CONDITION AND RUN/FAULT RELAY CONTACT STATUS

Relay Contact Status (Terminals K1 and K2 of TB2)

Run Relay Operation

(Jumper J4 Installed in “RUN” Position)

(Factory Setting)

Drive
Operating
Condition

Power Off

Run Mode*

Stop Mode*

Fault** Drive Tripped Open Closed Open Closed

Description

Main Power

Disconnected

Normal

Drive Operation

Selected by

Operator

Jumper J2 Installed in

“NO” Position

(Factory Setting)

Open Closed Open Closed

Closed Open Closed Open

Open Closed Closed Open

Jumper J2 Installed in

“NC” Position

Jumper J2 Installed in

Fault Relay Operation

(Jumper J4 Installed in “FAULT” Position)

“NO” Position

(Factory Setting)

Jumper J2 Installed in

“NC” Position

*Run Mode or Stop Mode is selected using the Forward-Stop-Reverse Switch. ** Fault: Overload, I2t, Short Circuit, Undervoltage, and Overvoltage.

21

0 AC LINE FUSING

1

his drive does not contain AC line fuses. Most electrical codes require that each ungrounded conductor

T

ontain circuit protection.

c

o not fuse neutral or ground connections.It is recommended to install a fuse

D

(Littelfuse 326, Buss ABC, or equivalent) or a circuit breaker in series with each ungrounded conductor.

not fuse motor leads.

For the recommended fuse size, see Table 2, on page 11.

Wire the drive in accordance with the National Electrical Code requirements and other local codes that may

apply to the application.

11 DRIVE OPERATION

11.1 START-UP PROCEDURE –

After the drive has been properly setup (jumpers and trimpots set to the

desired positions) and wiring completed, the startup procedure can begin. If the AC power has been

roperly brought to the drive, the power (PWR) LED will be illuminated green. The status (ST) LED will

p
indicate drive status, as described in Section 11.2. To remove and install the Finger-Safe Cover, see
Section 5, on page 14.

11.2 FAULT RECOVERY – The drive monitors

four faults (Undervoltage, Overvoltage,
Short Circuit at the motor (phase-to-

2

t). Table 5 describes how the

phase), I
drive will automatically start (factory
setting) after the fault has cleared.

Application Note – In Manual Start
Mode, the drive must be manually
reset for any fault. Use the Manual
Start Switch, as described in Section

TABLE 5 – FAULT RECOVERY & RESETTING THE DRIVE*

ault

F

Undervoltage

Overvoltage

Short Circuit

I2t

*The fault must be cleared before the drive can be reset.

utomatic Start Mode (Factory Setting)

A

rive will automatically start

D

after the bus voltage returns to the operational level

or when the drive is first turned on (power up).

Drive will automatically start

after the bus voltage returns to the operational level.

Drive will automatically start

after the short circuit is removed.

Drive must be manually r

estarted

9.6, on page 20. Also see Section

12.2, on page 23.

11.3 RESTARTING THE DRIVE AFTER AN

2

t FAULT HAS CLEARED – The drive

I

can be restarted after an I

2

t Fault has
cleared by any of the following meth­ods.

Note: If an I2t Fault occurs, the motor
may be overloaded. Check the motor
current with an AC RMS responding
ammeter. Also, the CL setting may be
set too low. See Section 13.7, on
pages 25 and 26.

1 Disconnect and reconnect the AC

power (approximately 15 seconds).

TABLE 6 – DRIVE OPERATING CONDITION &

STATUS LED INDICATOR

Drive Operating Condition

Normal Operation (Run) Slow Flash Green

Overload (120% – 160% Full Load)

I2t (Drive Timed Out)

Short Circuit Slow Flash: Red

Undervoltage

Overvoltage

Stop Steady Yellow

Notes: 1. Slow Flash = 1 second on and 1 second off. Quick Flash = 0.25
second on and 0.25 second off.
is removed, before the I
flash green.

3. In Manual Start Mode, when the Undervoltage or Overvoltage

condition is corrected, the “ST” LED will flash Red / Yellow / Green.

2. In Manual Start Mode, when the Overload

2

t times out and trips the drive, the “ST” LED will

Flash Rate1and LED Color

Steady Red

Quick Flash Red

Quick Flash Red / Yellow

Slow Flash Red / Yellow

The “ST” LED must change from quick flashing red to flashing red/yellow.

Do

.

2

3

3

2 Setting the Main Speed Potentiometer to zero (fully counterclockwise).

Note: In order to be able to reset the drive by setting the Main Speed Potentiometer to zero, it is
necessary to have the MIN Trimpot set to zero (fully counterclockwise).

3 Open and close the Enable switch or contact. See Section 9.8, on pages 20 and 21.

12 DIAGNOSTIC LEDS

The drive contains two diagnostic LEDs to display the drive’s operational status. See Figure 5, on page 13,
for the location of the “PWR” and “ST” LEDs.

22

2.1 POWER ON (PWR) –The “PWR” LED will illuminate green when the AC line is applied to the drive.

30

MIN

(Shown Factory Set to 0% Frequency Setting)

0

15

40

35

80

(Shown Factory Set to 100% Frequency Setting)

MAX

70

75

100

110

90

OFFSET

-

+

ADJUST

1

2.2 STATUS LED (ST) –The “ST” LED is a tricolor LED which provides indication of a fault or abnormal

1

ondition. The information provided can be used to diagnose an installation problem such as incorrect

c

nput voltage, overload condition, and drive output miswiring. It also provides a signal which informs

i

he user that all drive and microcontroller operating parameters are normal. Table 6, on page 22,

t
summarizes the “ST” LED functions.

Note: The drive is factory set to the Automatic Start Mode. For Manual Start/Reset, see Section 9.6,
on page 20.

13 TRIMPOT ADJUSTMENTS

The drive contains trimpots which are factory set for most applica-

ions. See Figure 5, on page 13, for the location of the trimpots

t
and their approximate factory calibrated positions. Some applica­tions may require readjustment of the trimpots in order to tailor the
drive for a specific requirement. The trimpots may be
readjusted as described below.

WARNING! If possible, do not adjust trimpots with

the main power applied. If adjustments are made
with the main power applied, an insulated adjustment tool
must be used and safety glasses must be worn. High voltage
exists in this drive. Fire and/or electrocution can result if caution is
not exercised. Safety Warning, on pages 8 and 9, must be read and
understood before proceeding.

13.1 MINIMUM SPEED (MIN / OFFSET) –

the motor.

13.1.1 Models KBVF-27, 29 – The MIN Trimpot is factory set to

0% of frequency setting. For a
higher minimum speed setting, rotate the MIN
Trimpot clockwise. See Figure 28.

13.1.2 Models KBVF-45, 48 – The OFFSET Trimpot on the

SIVFR is a 10-turn trimpot which allows for accurate
setting of the minimum speed of the motor. The
OFFSET Trimpot is factory set to 0% of frequency
setting. For a higher minimum speed setting, rotate
the OFFSET Trimpot clockwise. See Figure 29.

Sets the minimum speed of

FIGURE 28 – MINIMUM SPEED

TRIMPOT RANGE

MODELS KBVF-27, 29

FIGURE 29 – OFFSET TRIMPOT

MODELS KBVF-45, 48

FIGURE 30 – MAXIMUM SPEED

TRIMPOT RANGE

MODELS KBVF-27, 29

Note: The MIN Trimpot on Models KBVF-45, 48 is
not functional.

13.2 MAXIMUM SPEED (MAX) – Sets the maximum speed

of the motor

13.2.1 Models KBVF-27, 29 – The MAX Trimpot is factory

13.2.2 Models KBVF-45, 48 – The MAX Trimpot on the SIVFR is a 10-turn trimpot which allows for

.

set to 100% of fr
maximum speed setting, r
ting, rotate the MAX Trimpot counterclockwise. See Figure 30.

accurate setting of the maximum speed of the motor. The MAX trimpot is factory set to 100%
of frequency setting. For a higher maximum speed setting, rotate the MAX Trimpot clockwise.
For a lower maximum speed setting, rotate the MAX Trimpot counterclockwise. See Figure 31,

equency setting. For a higher

otate the MAX T

rimpot clockwise. For a lower maximum speed set

-

23

n page 24.

MAX

-

+

ADJUST

(Shown Factory Set to 1.5 Seconds)

1.5

.3

3

ACC

20

10

17

(Shown Factory Set to 1.5 Seconds)

1.5

.3

3

DEC/B

20

10

17

(Shown Factory Set to 1.5 Volts/Hz)

COMP

0 3

.8

1.5

2.3

o

3.3 ACCELERATION (ACC) –Sets the amount of time for the motor to

1

ccelerate from zero speed to full speed. The ACC Trimpot is factory

a

et to 1.5 seconds. For longer acceleration time, rotate the ACC

s

rimpot clockwise. For more rapid acceleration, rotate the ACC

T
Trimpot counterclockwise. See Figure 32.

Note: Rapid acceleration settings may cause the current limit circuit
to activate, which will extend the acceleration time.

FIGURE 31 – MAXIMUM

SPEED TRIMPOT

MODELS KBVF-45, 48

13.4 DECELERATION (DEC/B) – Sets the amount of time for

he motor to decelerate from full speed to zero speed. The

t
DEC/B Trimpot is factory set to 1.5 seconds. For longer
deceleration time, rotate the DEC/B Trimpot clockwise. For
more rapid deceleration, rotate the DEC/B Trimpot counter­clockwise. See Figure 33.

Application Note – On applications with high inertial loads,
the deceleration may automatically increase in time. This will
slow down the rate of speed of decrease to prevent the bus
voltage from rising to the Overvoltage Trip point. This function
is called Regeneration Protection.

for very high inertial loads that both the ACC and DEC/B
Trimpots should be set to greater than 10 seconds.

For rapid stopping, install the optional DBVF – Dynamic
Brake Module (Part No. 9598). See Section 3.5, on page 10.

13.5 SLIP COMPENSATION (COMP) – Sets the amount of

Volts/Hz to maintain set motor speed under varying loads.
The COMP Trimpot is factory set to 1.5 Volts/Hz, which
provides excellent speed regulation for most motors. To
increase the slip compensation, rotate the COMP Trimpot
clockwise. To decrease the slip compensation, rotate the
COMP Trimpot counterclockwise. See Figure 34.

The slip compensation may be adjusted as follows:

1. Wire an AC RMS ammeter in series with one motor

phase.

2. Run the motor and set the unloaded speed to approxi-

mately 50% (900 RPM on 4-pole 1500/1725 RPM
motors).

It is recommended that

FIGURE 32 – ACCELERATION

TRIMPOT RANGE

ALL MODELS

FIGURE 33 – DECELERATION

TRIMPOT RANGE

ALL MODELS

FIGURE 34 – SLIP COMPENSATION

TRIMPOT RANGE

ALL MODELS

3. Using a tachometer, record the unloaded speed.

4. Load the motor to the nameplate rated curr

Amps).

5. Adjust the COMP T

the unloaded RPM.

6. The motor is now compensated to provide constant speed under varying loads.

24

ent (AC

rimpot until the loaded RPM is equal to

3.6 BOOST (DEC/B) –When the drive is set for 50 Hz Motor

(Shown Factory Set to 5 Volts/Hz)

5

D

EC/B

0 30

8

1

5

23

(Shown Factory Set to 10.7 Amps)

4.0

CL

12.5

6.1

8.3

10.7

(Shown Factory Set to 14.4 Amps)

17.05.5

CL

7.4

9.8

14.4

(Shown Factory Set to 7.4 Amps)

8.53.0

CL

4.4

5.8

7.4

1

peration (Jumper J1 installed in the “50Hz” position), the

O

EC/B Trimpot automatically becomes the adjustable

D
BOOST Trimpot.

ost 60 Hz motors conforming to NEMA standards can

M
operate from a preset Volts/Hz curve. 50 Hz motors, how­ever, generally differ widely in their characteristics.
Therefore, it is necessary to have adjustable Boost to
obtain maximum motor performance.

To increase the boost, rotate the BOOST Trimpot clock­wise. To decrease the boost, rotate the BOOST Trimpot
counterclockwise. See Figure 35.

In order for the 50 Hz motor to run properly, the boost
must be adjusted. If the application does not require full
torque below 10 Hz, the Boost (DEC/B) Trimpot can be
conservatively set at 8% (9 o’clock position).

Note: In 50 Hz motor operation, the deceleration time is
automatically set to the same as the Acceleration Trimpot
(ACC) setting.

WARNING! To avoid motor winding heating and
failure, do not overboost the motor.

The Boost (DEC/B)T

1. Wire an AC RMS ammeter in series with one motor

phase.

rimpot may be adjusted as follows:

FIGURE 35 – BOOST TRIMPOT RANGE

ALL MODELS

FIGURE 36 – CL TRIMPOT RANGE

MODEL KBVF-27

FIGURE 37 – CL TRIMPOT RANGE

MODEL KBVF-29

2. Run the motor unloaded at approximately 4 Hz

(or 120 RPM).

Note: An unloaded motor with excessive boost will
draw more current than a partially loaded motor.

3. Increase the boost until the ammeter reaches the

nameplate rated current (Amps AC).

4. Using the Main Speed Potentiometer, slowly adjust the

motor speed over a 0 – 15 Hz (0 – 450 RPM) range. If
the motor current exceeds the nameplate rating,
decrease the boost setting.

13.7 MOTOR OVERLOAD (I2t) WITH RMS CURRENT LIMIT

(CL)* –

maximum current to the motor, prevents motor burnout,
and eliminates nuisance trips. The CL Trimpot is factory set
to 160% of the drive rated curr
To decrease the current limit, rotate the CL Trimpot counterclockwise. See Figures 36 – 39,
on pages 25 and 26.

*UL approved as an electronic overload protector for motors.

In order to ensure that the motor is properly protected with the I2t feature, it is required that the
CL Trimpot be set for 160% of the motor nameplate rating. This is accomplished as follows:

Sets the current limit (overload), which limits the

ease the current limit, rotate the CL Trimpot clockwise.

o incr

ent. T

FIGURE 38 – CL TRIMPOT RANGE

MODEL KBVF-45

25

ote:This adjustment must be made within 6 seconds or

(Shown Factory Set to 13.3 Amps)

15.55.0

CL

7.6

1

0.3

13.3

N

2

Trip will occur.

he I

t

t

onnect an AC RMS ammeter in series with one motor

1.C

hase.

p

et the CL Trimpot fully counterclockwise.

2.S

djust the speed setting to 30% of full speed.

3.A

ock the motor shaft and adjust the CL Trimpot to 160%

4.L

of the motor nameplate rated current.

xample:A 2 HP motor has a full load current rating of 5.2 Amps. Set the CL Trimpot to 5.2 X

E

160% = 8.3 Amps

FIGURE 39 – CL TRIMPOT RANGE

MODEL KBVF-48

26

– NOTES –

27

IMITED WARRANTY

L

For a period of 18 months from the date of original purchase, KB Electronics, Inc. will repair or replace
without charge, devices which our examination proves to be defective in material or workmanship. This
warranty is valid if the unit has not been tampered with by unauthorized persons, misused, abused, or
improperly installed and has been used in accordance with the instructions and/or ratings supplied. The
foregoing is in lieu of any other warranty or guarantee, expressed or implied. KB Electronics, Inc. is not
responsible for any expense, including installation and removal, inconvenience, or consequential damage,
including injury to any person, caused by items of our manufacture or sale. Some states do not allow cer­tain exclusions or limitations found in this
warranty and therefore they may not apply to you. In any event, the total liability of KB Electronics, Inc.
under any circumstance, shall not exceed the full purchase price of this product. (rev 2/2000)

COPYRIGHT © 2005 KB Electronics, Inc.

All rights reserved. In accor

dance with the United States Copyright Act of 1976, no part of this publication
may be reproduced in any form or by any means without permission in writing from KB Electronics, Inc.
(8/2002)

KB ELECTRONICS, INC.

12095 NW 39th Street, Coral Springs, FL 33065-2516 • [phone] • FAX [phone]
Outside Florida Call Toll Free [phone] • [e-mail]
www

.kbelectronics.com

(A40388) – Rev. B – 6/2006

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