Description And Specification; Control System; Cooling System; Load System - Simplex Trident Manual

3 DESCRIPTION AND SPECIFICATION

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8 — Description and Specification
Simplex Trident load banks are precision test instruments de-
signed to apply a selectable load to a power source and measure
the source's response. They are used for routine maintenance
exercise to ensure the long-term reliability and readiness of the
standby generator. Load banks can also eliminate the detrimen-
tal effects of unloaded operation of diesel engine generators as
well as prevent damage from reverse power generation.
Trident load banks are available in models ranging from 150
kilowatts up to 1250 kilowatts. All standard Trident models have
a step resolution of 50 kilowatts.
Trident load banks feature a Human-Machine Interface
(HMI) touchscreen, which controls load bank operation and
displays the unit's status. With the HMI, the operator can apply
a desired load and measure the response of the test source.
Trident load banks are cooled by forced air, delivered by an
aluminum fan blade directly driven by a TEFC motor. The air is
brought in through the front of the load bank and expelled through
the rear.
The load system comprises independently controlled Simplex
Powr-Web resistors, which have been designed specifically for
use in load bank systems. The load elements are supported by
high-temperature, ceramic-clad, stainless-steel rods across their
entire length, virtually eliminating element-to-element short
circuits. The elements are arrayed in discrete trays, which are
independently serviceable.
The Trident is protected by sensors to ensure that the load
bank is sufficiently cooled and that the exhaust does not exceed a
safe temperature, which could damage the load bank or present
a safety hazard to the operator. When a failure occurs, the safety
system immediately removes the load to protect the equipment
from permanent damage.
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