Portable Load Bank Model L-72 for Generator Testing and Power System Validation

The Portable Load Bank Model L-72 is a high-performance, three-phase resistive load bank engineered for field-based generator testing, power system validation, and emergency power readiness verification. Designed with portability in mind, this unit offers full-load testing capabilities up to 72 kW (60 kVA at 0.8 PF) across single or three-phase configurations, making it ideal for both temporary and permanent installations in industrial, commercial, and remote site applications.

Engineered for durability, the L-72 features an IP54-rated stainless steel chassis with integrated lifting eyes and forklift pockets, enabling easy transport between sites without compromising safety or structural integrity. Its active cooling system—featuring variable-speed fans controlled by temperature sensors—ensures efficient heat dissipation under continuous operation, reducing thermal stress on resistor blocks and extending service life.

Electrical performance meets international standards such as IEC 60034-1 and IEEE 115, with accuracy within ±1% for voltage, current, active power, and power factor measurements. The built-in digital control panel supports real-time monitoring via Modbus RTU over RS-485, while optional Ethernet connectivity allows integration into SCADA systems for remote diagnostics and load scheduling.

Safety is prioritized through multiple protections including short-circuit detection, overtemperature shutdown, ground fault protection, and emergency stop functionality—all compliant with CE, UL, and CCC certifications. A dedicated calibration certificate accompanies each unit, with recommended recalibration every 12 months using NIST-traceable equipment.

An anonymized case study from a renewable energy project in Northern Europe demonstrates its effectiveness: during grid connection testing of a 100 kW wind turbine, the L-72 was used to simulate full-load conditions for 4 hours continuously. Results showed stable voltage regulation (<±2%) and accurate reactive power handling, confirming compliance with local utility interconnection requirements.

This model is suitable for factory acceptance testing (FAT), commissioning, maintenance, and certification of diesel/gas generators, UPS systems, and microgrids. With a compact footprint (approx. 1200 × 700 × 1100 mm) and weight under 200 kg, it delivers maximum test flexibility in limited-access environments.