Large
Portable
Load Cube
2500KW
Load Cube
Portable Load Bank
The Simplex Load Cube
is an ultra-large capacity, fully portable, resistive/reactive
Load Bank System intended for field use in testing, maintenance
and performance proving of large generating systems. The Load
Cube is rated 2500KW, 1875KVAR at 400-600V commercial AC voltages.
The Load Cube is typically used to test large diesel generators,
turbines, paralleled generators and shipboard generators.
With a purpose-built design consisting of rugged, all-welded,
tubular steel frame, heavy gauge steel sides, guarded hinged
doors, power-operated ventilation louvers, the Load Cube is far
superior to designs which use refurbished and modified ISO shipping
containers. Four-sided access allows ready service of all components
and facilitates the ultra-compact design.
Compact and easily transportable, the Load Cube is ideal
for rental use. With a footprint of only 8 x 10 feet and a height
of less than 9 feet, the Load Cube is easily transportable by
conventional-height flat bed trailer. Lifting eyes and forklift
channels simplify site movement.
The Load Cube utilizes digital
load control for direct access of load values, block transitions,
and user programmable automation. A selection of digital power
meters and data acquisition software is available.
The Simplex Load Cube represents the ultimate technology
in large generator load testing performance.
Load Elements
Simplex Powr-Web:
Open wire, helically wound, chromium alloy, load element thermally
derated to 60%. 5% tolerance, 2% balance. .995 p.f. Element wire
mechanically supported over entire length such that if a wire
should break, the broken wire segments will not short to adjacent
conductors or to ground. Load elements are individually serviceable
and replaceable in the field without major disassembly of the
load bank. The load elements are installed in slide-out, removable
trays such that any element is easily accessed without disturbing
any other elements.
All materials used in the mounting and installation of the load
elements are suitable for the temperatures encountered, in both
normal operation and under fault conditions.Materials in direct
contact with the element wire are ceramic. Other materials which
structurally support the load elements and/or which form the
hot air duct within which the elements are mounted are steel,
stainless steel or aluminum. Plastics and glass reinforced plastic
materials and flammable materials are not used for installation,
support and mounting of load elements or in the construction
of the load bank hot air duct.
Inductive Elements:
Non-saturable, air-gap type, iron-core power inductors. 5% tolerance,
1% waveform distortion, 0.05 power factor, 150°C rise, 220°C
insulation.
Utilizes the UL Recognized, “Powr-Web”
load elementBranch circuit fuse protection of load elements
Inductive load elements
The Load Bank is a completely self-contained, freestanding unit which includes all resistive load elements, load control devices, load element branch circuit fuse protection, main load bus and terminals, cooling system, control power supply, unit controller and malfunction detection system and NEMA type enclosure.
Features
Portable, self-contained: lifting eyes, forklift channels, heavy skid base, and suitable for direct transport by standard flat bed truck
Horizontal airflow
Intake and exhaust louvers with linear actuator power operator and protective screen
Four-sided service access via hinged doors with lockable, flush latches
Power cable connection behind hinge-up door. Cables connect to full rated copper bus bar
Control connection to plug-in connectors located within recessed side well
NEMA3R weatherproof construction suitable for all-weather transport and use
PLC based digital control with remote operator interface terminal: direct access digital load control and user programmable automatic load control
Data acquisition system (optional): digital power meter and data acquisition software for use with user supplied PC
Tray mounted resistive load elements
Rack mounted inductive load elements
Forced air interior cooling
System Protection
Sensors, alarms (alarm message on remote operator interface terminal), lock-outs as appropriate, for the following:
Fan failure, each of two fansHigh exhaust temperature,each of two fansHigh intake temperatureHigh interior temperature,sensed at three pointsLouver open/closed,each of eight louversCapacity 3125KVA, 0.8 p.f.; 2500KW, resistive; 1875KVAR, inductive Voltage Nominal, 480V AC, 3-phase, 3-wire, to 600V, 50–60 Hertz Frequency 60 Hertz, 50 Hertz available Load Steps Digital load control, 10 kw, 7.5 kvar resolution. Circuits of 10–20–20–50–100–100–200–250–250–500–1000 KW 7.5–15–15–37.5–75–75–150–187.5–187.5–375–750KVAR Control Power Internal, derived from power source under load. 480-3-60V AC. Control circuits at 120V via internal isolation transformer. Fan motor load: 2 x 10HP, 13A. Control power load: 3.0 KVA, 6.25A. Duty Cycle Continuous Ambient Temperature 125°F Exhaust Rise 220°F Airflow Approx 60,000 cfm divided between two cooling fans Basic Dimensions 96.5”W x 110.25”H x 130”D Load Control Branch circuit contactors, each 50KW resistive circuit max or each 75KVAR inductive circuit max. Inductive circuits are double-break. Contactors have enclosed silver surfaced contacts, 120V coils; electrically operated and electrically held. Element Circuit Protection Branch circuit fuses, each 50KW resistive branch circuit max, each 75kvar inductive branch circuit max. 600v, 200KAIC, current limiting type. Power Wiring 150°C insulated; color-coded and numbered. Control Wiring 105°C Power Connection Plated bus bar behind hinge-up access door. Control Connection Connector plugs with recessed protective well. Cooling Forced air, horizontal airflow. 2 x 10HP, 3-phase, TEFC motor direct driving cast aluminum fan blades. Circuit breaker combination motor starter. Enclosure NEMA3R control section; NEMA3R power section. Epoxy primed, polyurethane finish coating, dark gray. Power operated ventilation louvers. Lifting eyes, forklift channels, hinged, lockable, access doors with flush latches. Sales Bulletin Dimensions and Key Features Diagram |
Remote digital load control and data acquisition PLC based load control with remote operator interface control Direct access digital load control in increments of 10kw, 7.5 kvar Operator programmable automatic test routines Digital Power Meter with data acquisition software |
