Avtron 1035409, Руководство пользователя

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Description
Avtron Outdoor Load Bank • Part Number K875A 1035409
2-2
Control power is derived from an integral 480:120 volt control transformer that derives its source
voltage from the blower input terminals.
The control panel contains a POWER ON-OFF switch with a CONTROL POWER light, a
BLOWER POWER light, blower power START and STOP pushbutton switches, an AIR FAILURE
light, a Load Bank OVER TEMP light, an AUTO/MANUAL selector switch, an AUTO light, a
MANUAL light, a MASTER LOAD ON-OFF switch, and individual KW LOAD STEP switches.
All load step switches are the toggle type with metal levers. The control panel also contains a FUSE
for protection of the control circuit and a Digital Meter (optional). Reference Outline Drawing
1036587.
Sized for mounting in a 19-inch rack enclosure, the control panel has a vertical height of
14.00 inches, and requires a minimum of 8 inches of clearance behind the panel. A remote control
enclosure is provided. Reference Outline Drawing SB2196.
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C A U T I O N
Voltage must not be connected to the Load Bank resistance elements
if the airflow switches have not closed. It is the customer’s
responsibility to ensure all load is dropped if an air failure is detected.
DO NOT jumper out any air switches to prevent nuisance tripping.
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C A U T I O N
Voltage must not be connected to the Load Bank resistive elements if
any fault (overtemperature, motor overload, air failure) is indicated. It
is the customer’s responsibility to ensure all load is dropped if any
fault or alarm is detected.
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The K875A Load Bank is fabricated using heavy-gauge aluminized sheet steel, making a rigid
structure. Mounted within the structure are the load element resistor assemblies, load contactors,
and the cooling fans/blowers. The resistive elements are porcupine type, fully supported along their
length. Mounted on separate panels are the motor starter, motor overload relay, fuses, and customer
connection terminals. The cooling air is drawn in from the two sides and the back, forced across the
resistor elements, and exhausted out the top. The panel includes a temperature controlled heater,
which may be used to prevent condensation from hindering operation of the Load Bank.