Loading Rheostat 50KW 440V AC Three Phase

Product Code : SCL-EAE-12050

The Loading Rheostat 50KW 440V AC Three Phase is a high-power variable resistive load bank used for testing industrial generators, transformers, and power distribution systems in electrical engineering laboratories. Designed for engineering students and laboratory technicians, this apparatus absorbs large amounts of real electrical power to safely evaluate source efficiency and voltage stability under load.

Product Description

The Loading Rheostat 50KW 440V AC Three Phase by Science Lab Supplies provides an exceptionally robust, stable, and accurate environment for full-load electrical machinery testing. This floor-mounted system utilizes an array of heavy-duty, industrial-grade oxidation-resistant nickel-chromium alloy resistive elements housed within a rugged, heavy-gauge sheet steel enclosure. The casing features a double-insulated anti-corrosive powder coating, ensuring long-term structural durability and extreme thermal resilience during continuous high-load operations.

The control interface incorporates heavy-duty selector switches and industrial-grade circuit breakers that permit discrete step-by-step load adjustments across all three phases simultaneously. To handle the significant thermal energy dissipated by a 50 kW continuous real load, the chassis integrates powerful, high-airflow forced-air axial cooling fans and active over-temperature safety cutouts. This self-contained engineering testing console replaces unsafe, unshielded wire arrays, making it a critical asset for modern technical institutions updating their pool of advanced scientific laboratory instruments.

Key Features

• High Power Dissipation Capacity: Safely manages up to 50 kW of continuous three-phase AC loading without material deformation.
• Forced-Air Cooling Network: Equipped with multiple high-velocity axial ventilation fans to ensure rapid continuous thermal energy removal.
• Balanced Symmetrical Loading: Features synchronized adjustments to maintain electrical equilibrium across all three phase lines ($L_1, L_2, L_3$).
• Heavy-Duty Floor Mobility: Mounted on four rugged, industrial-grade caster wheels with dual-locking brakes for secure positioning.
• Active Thermal Interlocks: Integrates automated over-temperature sensor breakers that auto-trip to shut down the load grid if safety thresholds are breached.
• Insulated High-Current Terminals: Outfitted with heavy-duty, shrouded binding posts or safety terminals to guarantee absolute user protection.

Technical Specifications

What's Included in the Kit

• 1 x Loading Rheostat 50KW 440V AC Three Phase industrial enclosure assembly
• 4 x High-current insulated connection cables with secure copper lug terminations
• 1 x Heavy-duty pre-installed industrial caster array
• 1 x Comprehensive English operational manual detailing schematic metrics and technical lab experiment setups

Applications / Uses

• Industrial Alternator Performance Evaluation: Allows technical students to apply large-scale resistive loads to industrial alternators to record voltage regulation drops.
• Power Transformer Efficiency Profiling: Used to load three-phase secondary transformer loops progressively to evaluate copper loss parameters.
• Microgrid and Inverter Grid Simulation: Provides a predictable electrical power sink to analyze the stabilization logic of renewable energy grid systems.
• Vocational Skill Training Frameworks: Serves as a primary hardware system inside comprehensive advanced engineering science kits.

How to Use the Loading Rheostat 50KW 440V AC Three Phase

1. Position the mobile rheostat unit on a level, fire-resistant laboratory floor area, keeping at least 1.5 meters of clearance around all exhaust grilles.
2. Ensure that the primary incoming circuit breaker and all individual load control toggles on the front panel are flipped to the OFF position.
3. Connect the three-phase output lines from your industrial source under test directly to the $L_1, L_2$, and $L_3$ high-current binding terminals, ensuring the ground stud is fully bonded.
4. Turn on the main incoming utility power line to energize the forced-air cooling fans, confirming that continuous exhaust airflow is fully operational before activating any load.
5. Sequentially engage the individual load step selector switches to increase the power draw incrementally while observing external panel meters.

Safety Note: Never terminate input power to the internal forced-air axial fans immediately after a heavy testing run. Always disengage the load steps first and allow the cooling fans to run continuously for at least 5 to 7 minutes to clear out the residual internal thermal energy.

Care & Maintenance

• Ventilation Integrity Audits: Regularly inspect the intake and exhaust mesh screens to clear away any airborne fibers, dust accumulation, or paper obstructions.
• Terminal Torque Inspections: Periodically verify that all high-current terminal lugs and internal electrical busbars are tightly bolted to prevent localized resistance hot spots.
• Storage Environment: Keep the load bank inside a dry, clean enclosure bay completely free of corrosive industrial chemicals, airborne metallic chips, or excessive ambient moisture.

Why Choose Science Lab Supplies

Science Lab Supplies is an internationally recognized manufacturer and global exporter of high-precision scientific laboratory instruments, educational trainers, and detailed training platforms. Operating under strict ISO 9001:2015 quality management systems, we ensure our hardware provides exceptional durability, exact calibrations, and comprehensive user protections. We proudly support vocational centers, polytechnics, and engineering universities across the globe with durable, customized inventory solutions and dependable worldwide supply logistics, delivering everything from high-power equipment networks down to institutional didactic models.

Frequently Asked Questions

• Can this loading rheostat handle continuous operation at full 50kW capacity?

Yes, because it is engineered with premium oxidation-resistant nickel-chromium alloy coils and multiple industrial-duty forced-air axial fans, it reliably sustains continuous maximum loads without experiencing thermal breakdown.

• What is the maximum current capacity per phase at 440V AC?

Under standard operating parameters at 440V AC three-phase, this loading rheostat draws a maximum current of approximately 65.6 Amperes per phase.

• What safety functions occur if the internal ventilation system fails?

The unit integrates an active safety thermal protection cutoff switch that automatically disconnects the internal resistor grid if airflow drops or core temperatures exceed safe operational margins.

• Does the forced-air cooling fan network require an external single-phase power supply?

The industrial cooling fans can be configured to run directly off the primary internal supply rails or via an independent auxiliary supply node depending on your lab arrangement.

• Is the heavy steel chassis frame properly grounded?

Yes, the heavy-gauge sheet steel structural frame features a low-resistance internal safety grounding line bonded directly to a dedicated heavy-duty external grounding stud to eliminate leakage risks.

Explore our complete catalog of high-power test gear online or contact our technical engineering team today to add this premium Loading Rheostat 50KW 440V AC Three Phase to your department's inventory of industrial didactic models.