Kussmaul Electronics 091-120-12-20 User Manual

FILE: IM_091-120-XX-XX-(XXX)(XX)_revA.P65
REV: A
REVISED BY: PSS
DATE: 07-19-13

INSTRUCTION MANUAL

R

AUTO CHARGE

3 STEP

AUTOMATIC BATTERY CHARGER

MODEL #091-120-XX-XX-(XXX)(XX)

170 Cherry Ave.
West Sayville, NY 11796

www.kussmaul.com

3 YEAR WARRANTY

Phone: [phone]

Fax: [phone]

[e-mail]

INTRODUCTION

The Auto Charge-3 STEP CHARGER, Model 091-120-XX-XX-(XXX)(XX) is a compact,
completely automatic single channel battery charger designed specifically for periodic
charging. Of rugged construction, the charger is made to withstand the shock and
vibration encountered in vehicle mounted equipment. Utilizing components, which meet
international safety standards, makes this charger ideal for worldwide applications.

BATTERY CHARGER FEATURES

Completely automatic operation, charges battery on demand
Output Voltage regulated, eliminates overcharging battery
Output Voltage, temperature compensated (optional)
Output, current limited to protect charger from overloading
A 5-LED display indicating charge state and faults
Reverse polarity protection

INSTALLATION

The 3 STEP CHARGER should be installed in an area with adequate ventilation.
Mount the charger using the four holes provided.
Connect wiring from the battery to the output terminal strip.
Double check battery wiring. Verify that the battery voltage appears at the charger
output terminals (See Figure 2).

PRINCIPLES OF OPERATION

A three-step lead acid battery charger operates in the three stages described below:

1) A discharged battery is recharged at a constant current (bulk charge) until its volt­age reaches an overcharge level of 2.42 volts per cell (approximately 14.5 vdc for a
12V battery). At this time the charger will switch to Finish Charge. The battery
accepts 75-85% of its capacity during bulk charge.

2) This overcharge voltage is now maintained constant at 2.42 volts per cell (absorp-
tion or finish charge) until the charge current tapers down to {battery capacity/35}
amperes. For the 12 volt, 80 ampere charger this current is 11.9 amperes. The
battery accepts 15-25% of it capacity during absorption charge.

3) Once the charge current reaches the tapered down value (see above), the voltage is
set to a float voltage of 2.24 volts per cell (approximately 13.4 vdc for a 12V bat­tery), and maintained at float charge. The battery is maintained at full charge during
float charge, and the green indicator labeled “Battery Charged” is illuminated.

Figure 1 depicts the above described operation. Note that the term “absorption charge”
is used interchangeably with “finish charge”. Upon application of AC power, the charger
is placed into bulk charge. When the charger switches to finish charge, a timer starts.
In the event that the charge current did not taper down to approximately C/35 amperes
after 2 ½ hours, the charger will automatically go to float charge, and a timeout will be
indicated. This timeout indicator can indicate an old or leaky battery, or it can indicate
that the charger is undersized for the battery being charged.

A battery fault indicator is provided to indicate the absence of a battery, a battery con­nected with reverse polarity, or a battery with an open circuit terminal voltage of less

than 1.35 volts per cell.

TEMPERATURE COMPENSATION

Temperature compensation is provided as an optional feature. A temperature probe is
provided which can be placed in the air surrounding the battery or bonded to the battery
case.

THREE STAGE CHARGING CURVE

BATTERY

CURRENT

BATTERY
VOLTA GE

FLOAT
STAGE

ABSO RPTION STAGE

Voltage Increasing

Current Constant

Voltage Constant

Current Decreasing

Voltage Constant

Full Charge Maintained

STAGE I

CONSTANT CURRENT

(BULK)

STAGE II

CONSTANT VOLTAGE

(ABSORPTION)

STAGE III

CONSTANT VOLTAGE

(FLOAT)

TIME

Figure 1

FUS E

BATTE RY FA ULT

TIME OU T

BUL K C HAR GE

FINIS H C HA RGE

BATTE RY C HARGED

BAT

+

#2 #1

TEMP. SENSEOUTPUT

L

N

INP UT

CHARGING WIRE SIZE

VOLTS AWG

12

24

32

36

48

72

96

120

10

12

12

14

16

16

16

16

+

-

THERMISTOR (OPTIONAL)

BATTERY

BLACK

GREEN

WHITE

A.C. INPUT

POWER

Figure 2

INSTALLATION WIRING

Specifications

12.75

12.00

4.75

4.25

6.75

9/32" DIA.

Model Number Input Power Input Fuse Output Charge Recommended

Indicator Battery Size

091-120-12-20 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 12 Volts, 20 Amps 25 Ampere 75 to 150 ampere-hours

091-120-24-12 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 24 Volts, 12 Amps 15 Ampere 40 to 80 ampere-hours

091-120-32-9 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 32 Volts, 9 Amps 15 Ampere 30 to 60 ampere-hours

091-120-36-8 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 36 Volts, 8 Amps 15 Ampere 27 to 54 ampere-hours

091-128-48-6 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 48 Volts, 6 Amps 8 Ampere 20 to 40 ampere-hours

091-128-72-4 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 72 Volts, 4 Amps 8 Ampere 13 to 26 ampere-hours

091-128-96-3 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 96 Volts, 3 Amps 4 Ampere 10 to 20 ampere-hours

091-128-120-2 115 Volts 60 Hz, 6 Amps 8 amp Slow Blow 120 Volts, 2 Amps 4 Ampere 7.5 to 15 ampere-hours

091-120-12-20-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 12 Volts, 20 Amps 25 Ampere 75 to 150 ampere-hours

091-120-24-12-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 24 Volts, 12 Amps 15 Ampere 40 to 80 ampere-hours

091-120-32-9-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 32 Volts, 9 Amps 15 Ampere 30 to 60 ampere-hours

091-120-36-8-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 36 Volts, 8 Amps 15 Ampere 27 to 54 ampere-hours

091-128-48-6-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 48 Volts, 6 Amps 8 Ampere 20 to 40 ampere-hours

091-128-72-4-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 72 Volts, 4 Amps 8 Ampere 13 to 26 ampere-hours

091-128-96-3-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 96 Volts, 3 Amps 4 Ampere 10 to 20 ampere-hours

091-128-120-2-230 230 Volts 60 Hz, 3 Amps 5 amp Slow Blow 120 Volts, 2 Amps 4 Ampere 7.5 to 15 ampere-hours

Input Power & Fuse: See Chart
Output Power: See Chart
Charge Indicator: See Chart
Mode Indicators: Battery Fault, Timeout, Bulk Charge, Finish Charge, and Battery Charged
Recommended Battery Size: See Chart
Weight: 22 pounds
Temperature Compensation: Add suffix “TC” to Model Number shown in Table below

OUTLINE DRAWING

INSTALLATION RECORD & WARRANTY

Date Installed

Installed By

Vehicle Identification

Vehicle Owner

WARRANTY

All products of Kussmaul Electronics Company Inc. are warranted to
be free of defects of material or workmanship. Liability is limited to repair­ing or replacing at our factory, without charge, any material or defects
which become apparent in normal use within 3 years from the date the
equipment was shipped.

Kussmaul Electronics Company, Inc. shall have no liability for dam­ages of any kind to associated equipment arising from the installation and
/or use of the Kussmaul Electronics Company, Inc. products. The pur­chaser, by the acceptance of the equipment, assumes all liability for any
damages which may result from its installation, use or misuse, by the
purchaser, his or its employes or others.