Technical Specifications

8/2012-Rev A (LCV)
C. An integral control power transformer shall be provided to supply 120V, 1 phase, 50 Hz to
the load banks control. Transformer primary and secondary control circuits shall be fuse
protected.
2.5 PROTECTIVE DEVICES
A. Current sensing switches are provided to sense current flow on each fan motor. These
switches change state when current flow is sensed. This feedback is electrically interlocked
with load application controls to prevent or remove load if current is not sensed or lost at
each fan motor.
B. An over-temperature switch shall be provided to sense the load bank exhaust in each vertical
resistor case assembly. The switch shall be electrically interlocked with the load application
controls to remove load from being applied in the event of an over temperature condition.
D. The exterior of the load bank shall have appropriate warning/caution statements on access
panels.
2.6 CONTROL PANEL
A. The control panel shall be a remote 19” rack mounted panel housed in a NEMA 4 type wall
mount enclosure. The control panel shall contain the following manual controls:
1. Power ON/OFF switch
2. Fan START/STOP pushbuttons.
3. Master load ON/OFF switch.
4. Load step switches for ON/OFF application of individual load steps.
Control panel visual indicators shall be as follows:
1. Power ON indication light.
2. Fan ON light.
3. Fan /Air FAILURE light.
4. OVERTEMPERATURE light.
B. A standard remote load dump circuit shall be provided as part of the load bank control circuit.
Provisions shall be provided to remove the load bank off-line from the operation of a remote
normally closed set of auxiliary contacts from a transfer switch or other device. In the event of
the remote contact opening, all load is removed.
2.7 DOCUMENTATION
A. Installation and operation manuals shall be provided with the equipment and shall include
complete details for the installation, commissioning, operation, and maintenance of the load
bank.
B. The manuals shall include the electrical schematic and interconnect drawings for the power
and control wiring for the load bank and all control devices.
C. A complete parts list with part numbers, device identification, and rating shall be included in
the manuals. The original manufacturers name and part number shall be included in the
parts listing.
D. Two (2) sets of manuals shall be provided with the load bank.