Emerson 150-500 KW (K675A) Load Bank Handbook

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9/2012-Rev C (K675A)
ENGINEERING SPECIFICATION
FOR HORIZONTAL AIRFLOW
OUTDOOR RESISTIVE LOAD BANK
(200-500 KW)
PART 1.0 GENERAL
1.1 SCOPE
A. This specification contains the minimum requirements for the design, manufacture and testing of
a UL listed, air-cooled, outdoor weatherproof resistive load bank.
B. The load bank is required for periodic exercising and testing of the (standby) emergency power
source. The load bank shall be permanently mounted in a weatherproof enclosure, forced air
cooled with remotely mounted control panel.
C. This specification shall apply if the load bank is supplied to the purchaser, or as a part of other
equipment.
D. Should the vendor take exception to any part of this specification, it shall be stated in the bid, and
referenced to the specification line number.
1.2 SUBMITTALS
A. The manufacturer shall submit for review technical data including features, performance,
electrical characteristics, physical characteristics, ratings, accessories, and finishes.
B. Shop drawings shall include dimensional plans, front and side elevations and mounting details
sufficient to properly install the load bank. Load bus configuration and load connections
termination area shall be clearly identified.
C. Electrical schematic drawings shall be provided to detail the operation of the load bank and the
provided safety circuits. Over-current protection and control devices shall be identified and their
ratings marked. A system interconnection drawing shall be included for control wiring related to
the load bank.
1.3 STANDARDS
A. The equipment covered by this specification shall be designed with the latest applicable NEMA,
NEC, and ANSI standards.
B. The load bank shall be listed to UL Standard 508A.
PART 2.0 PRODUCTS
2.1 RATINGS
A. The total capacity of the load bank shall be rated (________) KW at (______) Volts, 3-Phase, 3-
Wire, 60 Hertz, (_______) Amps per Phase at unity Power Factor and (___) KW minimum load
step resolution.
B. The load bank shall be designed for continuous duty cycle operation with no limitations. The load
bank shall operate in an ambient temperature of -28°C to 49°C (-20°F to 120°F).
2.2 MATERIAL AND CONSTRUCTION
A. The load bank shall be outdoor weatherproof construction, suitable for installation on a concrete
pad or structural base. All exterior fasteners shall be stainless steel. The load bank shall include
forklift channels in the base for lifting.