Load Cube

Load Cube

Load Cube

Product catalog summary
Overview
The Simplex Load Cube is a high-capacity, portable resistive/reactive load bank system designed for field testing, maintenance, and performance validation of large generating systems. It is rated at 2500kW and 1875kvar, suitable for commercial AC voltages between 400-600V. The Load Cube is primarily used for testing large diesel generators, turbines, and shipboard generators.

Design and Construction
The Load Cube features a robust design with a welded tubular steel frame and heavy gauge steel sides. It includes guarded hinged doors and power-operated ventilation louvers, offering superior durability compared to modified ISO shipping containers. The compact design allows for easy transport and service access from all sides.

Specifications
- Capacity: 3125 kVA, 0.8 power factor; 2500kW resistive; 1875 kvar inductive
- Voltage: Nominal 480vAC, 3-phase, 3-wire, up to 600V, 50–60 Hertz
- Frequency: 60 Hertz, with 50 Hertz available
- Load Steps: Digital load control with 10 kW, 7.5 kvar resolution
- Duty Cycle: Continuous
- Ambient Temperature: 125°F
- Exhaust Rise: 220°F
- Airflow: Approximately 60,000 cfm divided between two cooling fans

Load Elements
The Load Cube uses "Powr-Web" resistive load elements, which are air-cooled power resistors designed for load bank systems. These elements are conservatively operated at half the maximum temperature rating and are supported by high-temperature ceramic clad stainless steel rods. Inductive load elements are non-saturable, air-gap calibrated, and field replaceable, with embedded temperature sensors for overheating detection.

System Protection
The system includes sensors and alarms for fan failure, high exhaust and intake temperatures, and louver positions. Load elements are individually serviceable and replaceable without major disassembly.

Control and Connectivity
The Load Cube features PLC-based digital load control with remote operator interface, allowing direct access to digital load control and user-programmable automation. Optional equipment includes data acquisition systems and remote controllers.

Dimensions and Key Features
- Dimensions: 96.5”W x 110.25”H x 130”D
- Features: Portable design with lifting eyes and forklift channels, horizontal airflow, weatherproof construction, and tray-mounted resistive load elements.

Optional Equipment
Data acquisition systems, remote controllers, Cam-Lok quick connection panels, non-standard voltage ratings, and multi-unit control options are available.
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Catalog excerpts

Load Cube-1

LOAD CUBE 2500KW Load Bank System Description The Simplex Load Cube is an ultralarge capacity , fully portable, resistive/ reactive Load Bank System intended for eld 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 modied 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 conventionalheight at 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. 3125 kva, 0.8 power factor; 2500kw, resistive; 1875 kvar, inductive 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 7.5–15–15–37.5–75–75–150–187.5–187.5–375–750 kvar DUTY CYCLE: AMBIENT TEMP.: 125°F EXHAUST RISE: AIRFLOW: Approx 60,000 cfm divided between two cooling fans CONTROL POWER: Internal, derived from power source under load. 480-3-60vAC. Control circuits at 120v via internal isolation transformer. Fan motor load: 2 x 10hp, 13A. Control power load: 3.0 kva, 6.25A.

 Open the catalog to page 1
Load Cube-2

LOAD CUBE 2500KW Load Bank System • Page 2 Powr-Web Resistive Load Element Description Simplex Load Banks utilize “PowrWeb” load elements. The “Powr-Web” is an advanced design, air-cooled power resistor specically 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-circuitsafe design based on continuous mechanical support of the element by high temperature, ceramic clad stainless steel rods. The “Power Webs” are assembled into discrete trays which are assembled in a vertical “stack.”...

 Open the catalog to page 2
Load Cube-3

LOAD CUBE 2500KW Load Bank System • Page 3 The Load Bank is a completely selfcontained, 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 type enclosure. System Protection Sensors, alarms (alarm message on remote operator interface terminal), lock-outs as appropriate, for the following: • Fan failure, each of two fans • High exhaust temperature, each of two fans • High intake temperature • High interior...

 Open the catalog to page 3
Load Cube-4

LOAD CUBE 2500KW Load Bank System • Page 4 Load Bank Features Load Bank Control • Remote digital load control and data acquisition. Portable, self-contained a. Lifting eyes b. Forklift channels c. Heavy skid base d. Suitable for direct transport by standard at bed truck 2. Horizontal airow 3. Intake and exhaust louvers with linear actuator power operator and protective screen 4. Four-sided service access via hinged doors with lockable, ush latches 5. Power cable connection behind hinge-up door. Cables connect to full rated copper bus bar 6. Control connection to plug-in connectors located within...

 Open the catalog to page 4
*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.