Load box is a kind of power testing equipment, mainly for testing and maintenance of generators, uninterruptible power supply (UPS) and power transmission equipment. Its use avoids the economic loss caused by the failure of the standby unit or power supply start-up, and also provides a scientific basis for the detection of the load carrying capacity of new units.

Generator sets using diesel fuel, in less than 50% of the load or no-load situation will certainly form a light load caused by insufficient fuel, carbon deposits, reduced efficiency of the machine, ultimately leading to start-up failures, lack of power, excessive fuel, prematurely open the cylinder maintenance until scrapped.

The use of load can avoid the above situation, improve the reliability of diesel generator sets, load box equipment can provide an effective means of testing and maintenance of generator sets to verify the characteristics of the full load conditions, without having to interrupt the very important actual load.

Features of the load box produced by Zenithsun:

Zenithsun production of load box control diversification, the operator can manually control or laptop remote control of this system, adjust the load input capacity.

Load loading settings, with generator static, dynamic, sudden addition, sudden unloading test provides a variety of data charts intuitive display into the automatic analysis, and provide analysis results, the minimum 0.1KW/0.1KVA, thus greatly improving work efficiency.

Applicable voltage 400V, 440V, 690V, or other voltage standards.

All-weather continuous operation regardless of weather conditions.

The high power load box is made of standard container body, the structure is firm and convenient for lifting and moving.

The system meets the test requirements of national standard, ship standard, military standard, telecommunication standard and international standard.

Application areas of the load box produced by Zenithsun:

Marine, land, ocean engineering power station testing

10.5kv load box

Generator set factory testing, delivery inspection

UPS power supply testing and routine maintenance

Wind turbine testing


Solar photovoltaic power station testing


Transformer load detection


Frequency conversion power supply, inverter detection


Battery discharge detection