Generator Testing is the procedure of analysing the functionality of an electrical generator. Generators mainly convert mechanical energy into electrical energy in various settings, like power plants, industrial facilities, and backup power systems.
Since generators play a vital role in the supply of electricity, proper maintenance and testing of generators are mandatory. This article will help you understand the fundamentals of generator testing and its benefits.
The different methods of testing a generator are :
The standard tests performed in industrial generators are:
Type tests like Governor tests to check the hang, cold and hot starting tests etc, Routine tests, and Ancillary Plant tests.
Generators are used in various crucial places, leaving no room for errors in their operation. Since problems discovered early can be significantly less expensive and prevent issues in the future, generator testing assures that the generator works appropriately when you need it the most.
Generator testing can help ensure the generator operates safely, efficiently, and reliably. It confirms the quality of the generator and validates the insulation systems so that the generator can meet the electrical needs of the system it serves.
Regular testing ensures that it is in good working order and will be ready if the main power goes out and extends the life of generators too.
Common tests for generators include insulation resistance tests, winding resistance voltage and frequency testing, load bank testing etc.
One should get a generator serviced every 6-12 months or every 500 hours, whichever comes first. In general, no-load testing should be done weekly or monthly. Load testing should take place at least once a month or quarterly.
Depending on the type of testing required, various professionals like electrical engineers, technicians etc., may be involved. However, one common thing among all will be expertise and adequate training.
The benefits of testing generators are detecting potential problems, improved performance, enhanced safety and longevity, etc. It also helps save on unwanted repair costs in future.
When the diesel engine runs below its designed operating temperature for extended periods, unburned fuel is exhausted and observed as wetness in the exhaust system.This phenomenon occuring due to the prolonged usage of a generator on no load is known as “wet stacking”.
The solution is to run the engine on at least 40% of full load for 60 minutes. The exhaust will get hot enough to burn off the deposits, like the Pyrolytic cleaning function on your kitchen oven or stove.
There are three main types of generators: