Instructions On Load Bank Test Of Generator
How do I connect the load bank to the generator?
The generator provides backup power when you need it, and starts in case of power failure to prevent shutdown. To ensure that the generator is ready, you need to test it regularly. Using Load Bank, you can see the performance of the generator under various conditions. It also gives you peace of mind that the generator can run when needed.
Depending on the purpose of the test and the type of load bank used, you can connect the load bank to the generator in several ways. Learn more about carrying out a load bank generator test and what you need to do to connect the load bank to the generator.
Why is the load bank connected to the generator?
When testing the generator with the load bank, the power consumption can be adjusted through the load bank. You can also make adjustments when using other test methods, but doing so is often more difficult.
The standby generator is designed to start when the main power supply stops working. Although the generator should be ready, it may lose some efficiency, especially if it is not used frequently. Without regular load bank tests, the generator may not work when needed. Think of it as a car tire. When a car or truck fails to run for a long time, the tire will slowly lose air. You need to check your tires regularly to make sure they have enough air and are ready to go when needed.
The load bank test ensures that the generator operates in an emergency. Regular testing can also prevent wet piling that may occur in diesel generators. When there is a large amount of unburned fuel in the generator, it will combine with soot and condense. The mixture accumulates sediment in the exhaust system, reducing the overall efficiency of the system. During the load bank test, excess fuel will burn off to prevent accumulation and condensation.
Some industries, such as healthcare, financial services, and education, require regular load banking tests to ensure that backup power is always available. Load bank testing is also a key data center and government facility.
Permanent connection
How you connect the load bank to the generator depends on how you plan to test. You may need to test the generator during initial construction or weekly to ensure efficiency.
The three methods of connecting the load bank to the generator are:
1. Manual transfer switch
The manual transfer switch is connected to the generator, load bank and facility. Under normal conditions, the position of the switch allows power to flow from the generator to the facility. If the generator is to be tested, the switch needs to be switched from the facility to the load bank.
The manual toggle switch will temporarily stop the generator from supplying power to the facility. At the end of the test, you need to turn the switch back.
2. Automatic connection
Another connection option is to use an automatic transfer switch. Although the manual switch requires someone to turn the switch over on site, the automatic connection means that the load bank is always connected to the generator. Through automatic connection, you can set a regular load bank test plan that does not require direct manual participation.
If there is a problem with the load during the test, the switch will close automatically. The generator will then need to be reset manually.
3. Permanent connection
A permanent connection is another type of automatic connection. The load bank is always connected to the generator through a permanent connection. The load bank automatically detects the load and adjusts it according to the defined optimal load level.
No matter what type of connection you use, there should be special fault current protection. If there is a problem with the load bank circuit, fault protection will allow the facility load to continue to operate without interruption.
Matters to remember during generator load test
When carrying out load tests to protect yourself and your equipment, you should first consider security. In addition, make sure that you run the tests frequently enough and for long enough to accurately understand the efficiency of the generator. When carrying out the generator load bank test, please remember the following points:
Test within the recommended time: Depending on your industry and the type of generator you are testing, there may be a minimum test length. The duration of the test can vary from 30 minutes to several hours, depending on the size of the generator and the frequency of the test.
Frequent testing to maintain compliance: In some industries (such as healthcare), load banking testing is required, because electricity is required to keep life-saving devices running around the clock. Industry regulations may dictate how often you need to perform load tests, such as weekly or monthly. Running tests as needed ensures that the generator operates as efficiently as possible.
Disconnect the emergency switch: remember to turn the emergency stop switch to the off or off position before starting the test. Otherwise, the test will not work properly.
Wear correct personal protective equipment (PPE): anyone who performs load testing needs to wear appropriate equipment. This can include goggles, gloves, hearing protection, and brightly colored vests.
Check the liquid level before starting the test: Before starting the test, check the fuel tank, engine oil, coolant tank and other liquids. Before starting, the liquid level should meet the requirements.
