Technical Specifications

ManualsBrandsEmerson ManualsLoad BanksEmerson 150-500 KW (K675A) Load Bank

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.

Summary of content (4 pages)

PAGE 1
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.
PAGE 2
B. The load bank shall be constructed of heavy gauge aluminized steel per ASTM A463. Aluminized steel provides superior corrosion protection and extended service life, with a better tolerance to high heat exposure compared to the more common Galvanized steel. C. The main input load bus, load step relays, fuses and blower/control relays shall be located within the load bank enclosure.
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C. To provide for major fault protection, branch fuses shall be provided on all three phases of switched load steps above 50KW. Branch fuses shall be current limiting type with an interrupting rating of 200K A.I.C. D. The exterior of the load bank shall have appropriate warning/caution statements on access panels. 2.6 A. CONTROL PANEL 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.
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PART 3.0 QUALITY ASSURANCE 3.1 QUALITY CONTROL A. The load bank shall be fully tested using a test specification written by the supplier. Tests shall include electrical functional testing, verifying conformance to assembly drawings and specifications. Each load step shall be cold resistance checked to verify proper calibration of resistive load steps and proper ohmic value. B. The manufacturer shall maintain this data on file for inspection purposes by the purchaser.