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Emerson Network Power
Avtron • 6255 Halle Drive, Cleveland, Ohio 44125, U.S.A.
216-573-7600 • FAX: [phone] • [e-mail]
Avtron K841B
Reactive Permanent Load Bank - 103 to 1875 KVAR
Specications subject to change without notice.
©2015 Emerson Network Power Bulletin 404• Rev. F
Specications subject to change without notice.
ROOF EXHAUST VENTILATOR
66.00 [1676.00]
“A” (see chart)
63.50
[1612.00]
80.00
[2032.00]
Load Bank Weight (approx.)
KVAR
“A”
inches [mm]
Weight
approx.
lbs. [kg.]
375-750
(single voltage)
89.00
[2260.00]
7,500 [3401]
375-750
(dual voltage)
116.00
[2946.00]
8,500 [3855]
900-1125
116.00
[2946.00]
9,000 [4082]
1500-1875
144.00
[3657.00]
10,000 [4535]
Load Bank Capacity Ratings
Capacity
Available
103 to 1875 KVAR
AC Voltages
480 or 240/480 Volt AC,
3 phase, 60 Hz
Frequency
50/60 Hz (Reduced Voltage
and Capacity at 50 Hz)
Load Step
Resolution
0-3.75, 3.75, 37.5, or 375 KVAR
NOTE Designs for international 50/60 Hz voltages or custom
DC designs are also available. Consult factory.
Construction
Heavy gauge steel enclosure provides a rigid
structure with removable aluminized steel
panels for interior access. The base of the
unit features forklift channels for simplified
handling.
Cooling
The K841B contains a cooling fan to aid the
convection cooled reactors. The cooling fan
requires a power source of 120 volts, single
phase, 60 Hz.
Controls
The K841B control circuit requires 120 volts,
single phase, 60 Hz power. The standard 19"
rack-mount control panel includes a POWER
ON-OFF switch, BLOWER ON-OFF switch, a
POWER ON light, a MASTER LOAD ON-OFF
switch, a VOLTAGE SELECTOR switch (if ap-
plicable), and individual load step toggle
switches.
Reactors
Single and 3 phase iron core reactors are
designed for 130°C rise in a 50°C environment
with a maximum of 5% waveform distortion
and 0.05 p.f.
Protection
Each load step is fused using UL class T fuses
with 200,000 AIC rating. Each 3 phase re-
actor contains a normally closed thermal
switch in each coil. The load bank enclosure is
equipped with thermal switches. All thermal
switches are interconnected with the load
application control circuit.
Options
• 480 or 240/480 to 120 Volt Control
Transformer
• Under Frequency Protection
• Over Voltage Protection
• Remote Control Panel Enclosure (NEMA 12)
• Control Panel Mounted on Load Bank
All dimensions are in inches [millimeters].