Resistive Load Bank Equipped With Three Phase 380V AC Power Supply And 220V AC Auxiliary Control For Robust Operation

Product Features

1. Flexible load configuration

For three-phase independent resistive loads and inductive loads, the system supports hierarchical switching; the single-phase combined resistive power is 3.3 kW and the inductive power is 3.3 kVar; the overall rated resistive power is 10 kW and the rated inductive power is 10 kVar; the voltage settings are modularly combinable, enabling precise adjustment of both active and reactive power, with a freely adjustable power factor.

Resistance accuracy: ±3%; inductance accuracy: ±5%–10%; load-dependent data remains stable; test data reliability is high.

2. Diversified control modes

Local Control: Touchscreen-based visual operation, providing real-time, intuitive display of all electrical parameters—including voltage, current, active power, reactive power, apparent power, and power factor.

Remote Control: Supports Modbus TCP communication for interfacing with a host computer, enabling integrated remote measurement and control for automated production lines and laboratories.

3. Power Supply and Wiring Specifications

The main circuit is powered by a 380V AC three-phase four-wire system, with an auxiliary control power supply of 220V AC; it features copper busbar load terminals and a TB2504 dedicated auxiliary wiring strip, ensuring secure connections and compatibility with standard industrial wiring practices.

4. Comprehensive Safety Protection System

Equipped with a four-tier protection system comprising overheat alarm, overcurrent protection, overvoltage protection, and emergency stop function; the input voltage can withstand short-term exposure to a withstand voltage of 1.1 times the rated AC 380V; features a timed loading function, enabling automated testing without manual supervision.

application scenarios

Power Supply Factory Acceptance Aging Test  Three-phase UPS, power frequency inverter, photovoltaic grid-connected inverter, energy storage converter (PCS), voltage-stabilized power supply with load aging test, and full-load reliability verification Simulates actual on-site conditions with a hybrid active and reactive power load scenario

Generator set performance testing  Perform full-load and half-load step-by-step tests on diesel generator sets and small hydroelectric units to verify their output voltage stability, voltage regulation characteristics, load-induced temperature rise, and power factor adaptability.

Inspection of distribution cabinets and switchgear assemblies   Temperature rise tests for high-and low-voltage switchgear assemblies, busway systems, terminal blocks, and circuit breakers; these tests evaluate the heat generation of components under prolonged load conditions, the reliability of wiring connections, and the protection trip logic.

Electrical Engineering Teaching Laboratory Practical Training  University-level Electrical Engineering Department: Reactive Power Compensation Experiment Platform, Power Factor Regulation Practical Training Platform, Three-Phase Unbalanced Load Simulation Platform, and Relay Protection Commissioning Teaching and Training Platform

FAQs

1. Q: Can the equipment be connected in a single-phase configuration or subjected to three-phase asymmetric loading?

A: No, this is not supported; the equipment is configured for three-phase synchronous balanced switching loading, which prohibits prolonged full-load operation on a single phase or three-phase unbalanced operation, thereby preventing uneven stress distribution on internal components and avoiding localized overheating damage.

2 Q: Can the equipment be connected in a single-phase configuration or subjected to three-phase asymmetric loading?

 A: No, this is not supported; the equipment is configured for three-phase synchronous balanced switching loading, which prohibits prolonged full-load operation on a single phase or three-phase unbalanced operation, thereby preventing uneven stress distribution on internal components and avoiding localized overheating damage.

3. Q: How should you troubleshoot if remote communication fails to connect to the host computer?

① Confirm that the load cabinet and the host computer are on the same local area network (LAN) with matching IP address subnets; 

② Verify that the communication protocol is Modbus TCP, and that the port and register address parameters are correctly configured;

③ Check the wiring at the network port located at the rear of the cabinet and the switch link; then, restart the cabinet's control unit and attempt the connection again using the host computer software.

4. Q: What are the possible causes for the system to automatically unload when a thermal overload alarm is triggered during operation?

① The air intake or exhaust filter screens have accumulated dust and become clogged, resulting in poor airflow through the ventilation ducts

② The ambient temperature at the site has remained above 50°C for an extended period, leading to insufficient heat dissipation margin;

③ The system has been operating continuously at full load for a prolonged period, causing the fan to fail to rotate; this issue can be resolved by cleaning the dust filter, inspecting the heat dissipation fan, and improving the local ventilation conditions.