load bank

Standby power sources like uninterruptible power supplies (UPS) and diesel generators are only sometimes used. They only take over when the main power supply goes out. Because of this, they may only be used for a short time. They may be made for a certain amount of power, but it is essential to ensure they work in real life, where there may be different power supply problems.

How Does Load Testing Work?

A load bank is an independent, incremental load device that can accurately mimic the operational or actual load that a power source is meant to support.

Most of the time, the load bank comprises heavy-duty resistors that draw power from the power source. Using resistive elements, it turns the resulting electrical energy into heat. Blowers that are built into the load bank remove the heat that is made.

After the load bank test, measurements are taken while the battery is discharged. This is where the performance of the battery and the system is noted. When a load bank test finds problems with the generator and UPS, immediate steps must be taken to improve their performance.

Load banks can be fixed to the site and always connected to a power source, or they can be moved around and used for testing when needed.

Reasons For Load Bank Testing

Load Banks Are Essential Parts Of Power Supply Systems. The point of testing with a load bank is to ensure that the power source and its parts are as efficient as possible. UPS and power supply systems must be tested regularly to ensure they work when required.

Manufacturing And Installation Testing Of Power Systems 

It lets all the system parts be tested to ensure they work together as planned, and it can help find any possible weaknesses in a controlled environment. Product specifications and delivery contracts may cover these testing aspects directly, making load bank testing a required step for compliance.

Regular Preventive Maintenance

If you do not do regular preventive maintenance and run your machine with a low load, it can lead to high operating costs, easy wear and tear, and more pollution. A load test helps ensure the generator can produce and maintain a full load without getting too hot and shutting down. This lets maintenance be done before a problem happens when weaknesses are found in a controlled environment instead of risking a power outage when a deficiency can cause the system to fail.

Elimination Of Wet Stacking

Diesel engines often have a problem called wet stacking, in which unburned fuel leaks into the exhaust system. Over time, these fuel deposits build up in parts of diesel standby generators that do not run very often or only run with a light load. This means that they can only work at a lower output level when needed. A diesel engine should run at least 60 per cent of its rated power output for efficient combustion. Load bank testing will help remove piston deposits, clean engine castings and exhausts, and find weak spots.

Compliance With Regulations

Load bank testing is necessary for some backup power generation applications. The National Fire Protection Agency (NFPA) and the National Electric Code (NEC) are international groups with written rules about how emergency generators should be tested with a load bank.