Broman 123XL-2
load box manufactured by Miller Instruments Ltd.
FEATURES
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Compact
Portable
High Capacity
Easy to operate
Chart recorder connections
Optional electronic current regulator
3 year warranty
DESCRIPTION The Broman Portable Load Boxes are intended primarily for testing battery banks. They employ a compact array of
power absorbing elements mounted in a rectangular duct-like case with a heavy duty fan at one end. The energy
absorbed by the heating elements is transferred to the air being driven through the duct which can then be directed
through an open doorway. The control box, mounted on top of the duct and above the fan houses the master circuit
interrupt switch along with the load switches and ammeter. Two-way overload protection is provided by a thermal
switch which senses overheating and by an air flow switch which senses loss of cooling air. Operation of either of
these switches will trip the master circuit interrupt switch and sound a 95dB buzzer alarm.
SPECIFICATIONS: 123XL
Voltage Rating
125 volts DC/AC
Maximum Load Current
110 amperes
Maximum Load Power
14kW continuous
Load Current Steps
(@125 volts)
20, 20, 20, 20, 10, 10 amperes (course adjust)
5, 2, 2, 1 ampere (fine adjust)
Ammeter Range
0 - 120 amperes
Current Monitor
1 mV DC = 1 ampere
Auxiliary Power
120 volts AC (required for fan)
Dimensions
24H x 14W x 28L (inches)
Weight
60 pounds
Accessories:
Test Leads: Pair of #4 welding cable leads, 30 feet long, fitted with heavy duty insulated battery
clips on outboard ends, and safety-type (dead front) plugs on inboard ends.
Broman 150XL-2
load box manufactured by Miller Instruments Ltd.
FEATURES







Compact
Portable
High Capacity
Easy to operate
Chart recorder connections
Designed to attach to the model 123XL-2
3 year warranty
DESCRIPTION The Broman model 150XL-2 is designed to act as an accessory for the model 123XL-2. A combination of a 123XL-2
and two 150XL-2 load boxes may be connected together to provide a maximum of 40kW of power dissipation. They
employ a compact array of power absorbing elements mounted in a rectangular duct-like case with a heavy duty fan
at one end. The energy absorbed by the heating elements is transferred to the air being driven through the duct
which can then be directed through an open doorway. The control box, mounted on top of the duct and above the fan
houses the master circuit interrupt switch along with the load switches and ammeter. Two-way overload protection is
provided by a thermal switch which senses overheating and by an air flow switch which senses loss of cooling air.
Operation of either of these switches will trip the master circuit interrupt switch and sound a 95dB buzzer alarm.
SPECIFICATIONS: 150XL-2
Voltage Rating
125 volts DC/AC
Maximum Load Current
150 amperes
Maximum Load Power
18.7kW continuous
Load Current Steps
(@125 volts)
90, 20, 20, 20 amperes
Ammeter Range
0 - 150 amperes
Current Monitor
1 mV DC = 1 ampere
Auxiliary Power
120 volts AC (required for fan)
Dimensions
24H x 14W x 28L (inches)
Weight
70 pounds
Accessories:
Test Leads: Pair of #2 welding cable leads, 30 feet long, fitted with heavy duty insulated battery
clips on outboard ends, and safety-type (dead front) plugs on inboard ends.
Broman 914XL
current controller box manufactured by Miller Instruments Ltd.
FEATURES






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Compact
Portable
High Capacity
Easy to operate
Chart recorder connections
Designed to attach to the model 123XL-2
3 year warranty
DESCRIPTION The Model 914XL Electronic Current Regulator is an optional auxiliary unit designed to operate in conjunction with
the Model 123XL Portable Load Box. Its purpose is to automatically maintain the battery discharge current at the
specified level over the duration of the test as the battery voltage diminishes. It does this by a feedback arrangement
whereby the discharge current, measured by means of a shunt within the load box, is compared to a stable reference
within the current regulator. As the discharge current tends to fall below the reference level, the comparator causes
additional current to be drawn from the battery to restore the original equality.
SPECIFICATIONS: 914XL
Maximum Load Current
20 amperes
Load Current Steps
1 ampere resolution
Ammeter Range (regulator)
0-20 amperes
Ammeter Range (total load)
0-400 amperes
Power
120 V AC (obtained from 123XL )
Dimensions
5W x 13L x 2½H (inches)
Weight
5 (pounds)