Large
Portable
Atlas-MW
1000KW
750KW
607KW
Atlas-Megawatt
Portable Load Bank
The Simplex Atlas-Megawatt is an ultra large capacity, high performance Portable Load Bank designed to provide the manufacturers, distributors and users of large AC generators and UPS systems with sophisticated testing capability.
The Atlas-Megawatt provides 1000KW of resistive load at both 240V and 480V, 3-phase. It can be applied at any AC voltage to 480VAC, 50-60-400 Hertz, single or 3-phase. Load step resolution is 5KW.
The Atlas-Megawatt is
a totally self-contained testing system. It includes all resistive
load elements, load control devices, load element circuit protective
devices, connection cable set, cooling system, malfunction detection
system, control power supply and test instrumentation.
Principal Sub-Systems
Load Elements: Simplex “Powr-Web” chromium alloy,
open wire, continuously supported, power resistor.
Load Control: 3-Pole magnetic contactors.
Load Element Circuit Protection: Branch circuit fuses.
One set of fuses each 50KW branch. Fuses are current limiting
type, 200,000 AIC, 600V, enabling safe use on large generating
or UPS system.
Cooling System: 3-phase, direct-drive fan, 26,000 CFM.
Malfunction Detection System: Protection against fan failure,
high exhaust air temperature, high intake air temperature, overvoltage
and fan reversal.
Control Power Supply: Dual voltage control power transformer
with supply power switchable to internal (generator) or external.
Test Instrumentation: 3½”, +/- 2% accuracy
panel meters. Options available.
Remote Control: Load control switch panel removable for
remote operation. Connection plugs will accept optional remote
control cables.
Connection: 12’ connection cable set including 3-phase
power cables, ground cable and external control power cord, stored
behind hinged door in rear compartment.
Atlas-Megawatt mounted on an optional highway trailer
Features
Ultra-high capacity, dual voltage
Fine load step resolution with toggle switch load control
Utilizes the UL Recognized, “Powr-Web” load element
Branch circuit fuse protection of load elements
Totally self-contained
Fan/control power-source is operator selectable:
Internal Power - Fan and control circuits powered internally, does not require external power
External Power - Fan and control circuits powered from external 3-phase outlet or other external source
Integral high capacity cooling fan with reversal fan motor
3-phase connection cable set stowed in over-sized cable compartment
Compact, rugged, portable enclosure with lift eyes, forklift channels, and casters
Double wall construction for cool exterior
Control compartments thermally insulated from load elements
Hinge-open control panel doors
Comprehensive automatic malfunction detection system with alarm lights
Test instrumentation
Remote control capability
Control Panel
AC instrumentation, 3½”, +/- 2% accuracy panel meters:
AC voltmeter with 3-ph. transfer switch, 0-600V
AC ammeter with 3-ph. transfer switch, dual scale, 0-2500/500A, with range selector switch
Frequency meter, 45-65 Hz
Load step control toggle switches
Master load control toggle switch
Control power switch
Voltage selector switch
Fan reversal switch
Operational indicator lights:
Normal Operation
Overvoltage
Fan failure/over temperature
Capacity 1000 KW at 240/480V, 3-ph. 750 KW at 208/416V, 3-ph. 607 KW at 240V, 1-ph. Voltage Dual: 240/480V AC, 3-ph. Operational at any voltage to 480V AC max., 1-ph. or 3-ph. Frequency 50, 60, 400 Hertz Load Step Resolution 5KW Fan/Control Power 230/460V, 3-ph., 60Hz 190/380V, 3-ph., 50Hz Switchable internal (generator) - External control power requirements: 230/460V, 3-ph., 60Hz 10/20A 230/460-115V control power transformer internal to Load Bank 15' external power cord Connection 3-wire plus ground Fault Rating 200,000 AIC Insulation Rating 600V, 302°F Duty Cycle Continuous Ambient Air Temp. 120°F max. Air Temperature Rise 390°F max. Net Weight 2800 lbs. Dimensions 48” W x 80” H x 73” D Enclosure NEMA-1 drip proof Options Instrumentation: 3½", +/- 2% accuracy, or 4½", +/- 1% accuracy or digital: Substitution of higher accuracy meters for standard 2% meters Kilowatt meter For use with auxiliary inductive Load Bank: Kilovar meter Power factor meter Four 1KW load steps Remote control cables Complimentary Load Banks to increase capacity: 1000KW auxiliary resistive Load Bank with 100KW load step resolution, dual voltage "Reactive-750", auxiliary inductive Load Bank; 750 KVAR, 3.75 KVAR load step resolution, dual voltage Total load current transformer bank. Permits system of Atlas-Megawatt plus auxiliary Load Banks to be metered from panel of Atlas-Megawatt Centralized control of system of Atlas-Megawatt plus auxiliary Load Banks NEMA-3R weatherproof configuration of Atlas-Megawatt enclosure. Includes removable exhaust hood or hinge-open protective door with safety interlock over air-exhaust outlet Highway trailer Click here for a complete list of options available for Large Portable Load Banks. Dimensions and Key Features Diagram |
Powr-Web Load
Element
Simplex Load Banks utilize the
UL Recognized, “Powr-Web” load element. The “Powr-Web”
is an advanced design, air-cooled power resistor specifically
designed for application to load bank systems. The “Powr-Web”
is conservatively operated at half the maximum temperature rating
of the alloy and features a short-circuit-safe design based on
continuous mechanical support of the resistor by high temperature,
ceramic clad stainless steel rods. The “Power Webs”
are assembled into discrete trays which are assembled in a vertical
“stack.” Each tray in the “stack” is independently
serviceable without disturbing adjacent trays.
Ratings
3333W at 120V
4170W at 139V
8333 watt 240/480V
16,777 watt at 480V
Specifications
Alloy: FeCrAl
Max. continuous temp. rating: 1920°F
Maximum operating temperature as applied in Load Bank: 1080°
F
Cool down time from operating to ambient temperature: 10 seconds
Construction
Calibrated to specific
ohm value
Welded lugs on each end
All load elements are continuously supported by vibration resistant,
ceramic clad, stainless steel throughrods
Branch Circuit Fuse Protection
The load of a Resistive Load Bank consists of a dense array of open, uninsulated power resistors mounted within a cooling air stream. Since the elements are electrically live, it is possible for a foreign object to penetrate the element array and create a short circuit of adjacent elements or a short to ground. Since the elements are densely packed, it is possible for a short circuit, once started, to rapidly propagate through the entire element array. As a Load Bank represents a relatively large amount of power concentrated within a relatively small volume, a self-propagating, cascading short circuit would have catastrophic results.
Simplex virtually eliminates
the dangers of short circuit through the use of branch circuit
fuse protection of the load elements. Per NEC 110-10, protective
devices shall clear a fault without “extensive damage”
to the circuit components. A Simplex Load Bank is divided into
branch circuits of not more than 50 KW each.
ATLAS-MEGAWATT PORTABLE LOAD BANK CAPACITY DETAIL |
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ATLAS-MEGAWATT PORTABLE LOAD BANK LOAD STEP DETAIL |
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