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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.
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Load Elements
System Controls
| • | PLC based digital load control. |
| • | Remote operator interface terminal and user programmable automatic test routines. |
Cooling
| • | Approximately 60,000 CFM divided by two cooling fans. |
| • | Power operated intake and exhaust louvers with protective screen. |
| • | Forced air cooling with horizontal airflow. |
System Protections
| • | Sensors, alarms (alarm message on remote operator interface terminal), lock-outs as appropriate, for the following: fan failure, high exhaust temperature, high intake temperature, high interior temperature (sensed at three points). |
| • | Load 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. |
Load Control
| • | 3-Pole magnetic contactors. |
Connections
| • | Control Wiring: 105°C, color coded. |
| • | Power Wiring: 150°C XLP color-coded. |
Power
| • | Control Wiring: connection to plug-in connectors located within recessed side well. |
| • | Control Power Supply: Dual voltage control power transformer with supply power switchable to internal (generator) or external. |
| • | Power cable connection behind hinge-up door. Cables connect to full rated copper bus bar. |
Enclosure
| • | Type 3R weatherproof construction suitable for all-weather transport and use. |
| • | Portable, self-contained: lifting eyes, forklift channels, heavy skid base, and suitable for direct transport by standard flat bed truck. |
| • | Four-sided service access via hinged doors with lockable, flush latches. |
| Capacity |
3,125KVA, 0.8 power factor; 2,500KW, resistive; 1,875KVAR inductive |
| Voltages |
Nominal, 480V AC, 3-phase, 3-wire to 600V, 50-60Hz |
| Load Steps |
Digital load control
10 KW, 7.5 KVAR resolution.
Circuits:
10-20-20-50-100-100-200-250-250-500-1000KW
7.5-15-15-37.5-75-75-150-187.5-187.5-375-750KVAR |
| Duty Cycle |
Continuous |
| Temperatures |
Ambient Air: 120°F
Exhaust Rise: 220°F |
| Airflow |
60,000 CFM divided between two cooling fans |
| Fault Rating |
Fuses are rated 200KAIC. The load bank has a 5KAIC short circuit current rating. |
| Load Wire Insulation Rating |
600V, 150°C |
| Control Wire Insulation Rating |
600V, 105°C |
| Fan/Control Power |
Control Power: Internal, from load bus: 480-3-60V AC
Control circuits at 120V via transformer.
Cooling fan: 2 x 10HP, 13A.
Load control: 3.0 KVA, 6.25A. |
| Load Control |
Branch circuit contactors, each 50KW resistive circuit max or each 75KVAR inductive circuit max.
Inductdive circuits are double break. Contactors have enclosed silver surfaced contacts, 120V coils (electrically operated and electrically held). |
| Element Circuit Protection |
Branch circuit fuses: 50KW each, resistive branch circuit max.
75KVAR inductive branch circuit max.
600V, 200KAIC current limiting type. |
| Dimensions |
96.5"W x 110.25"H x 130"D |
| Weight |
25,000 lbs. |
Note: Dimensions and weights are subject to change with capacities and options selected.
- Data acquisition systems
- Remote controller, suitcase-style or panel mount
- Cam-type power connections
- Non-standard voltage ratings
- Multi-unit control
Note: We are experts at building products that meet our customer's exact requirements. Contact Simplex if your job specifications require additional options or considerations.
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