The frequency schedule for load bank testing on a generator often depends on how the generator is classified and what it is a standby for.
Generator load bank test requirements.
The recommended procedure to follow for the load bank test would be to.
8 2 4 3 if a generator fails the monthly test it should be operated under a load supplied by a load bank i e.
For example if a generator is used as a backup for services associated with loss of life or serious injury such as in a hospital setting the testing requirements are much more frequent.
The only compliance reason you would be performing the load bank exercise is if the engine was less than 30 loaded during the monthly tests.
The equipment used to conduct a load bank test produces artificial loads on the generator by bringing the engine to an appropriate operating temperature and pressure level.
During an annual load bank test you might not want to hit the engine with a block load to which the engine may not be accustomed which could damage the engine.
The testing for an annual load bank test and the triennial exercise may be combined according to nfpa 110 2010.
A generator load bank test involves an examination and assessment of a genset.
At 25 of the nameplate kilowatt rating for 30 minutes.
During this two hour period the unit should be operated as follows.
Remove the load bank load first after the test.
O engine exhaust temperature during test if applicable p kw load under test q identification of unsatisfactory conditions and corrective action taken including parts replaced note.
8 4 2 3 has special requirements for diesel generators that can t meet the minimum exhaust temps or 30 load requirements.
Any examples are for illustrative purposes only.
It verifies that all primary components of the generator set are in proper working condition.
Transfer all manual or automatic transfer switches to the emergency source.
Load bank testing for two continuous hours each year.
6 4 4 1 1 2 specifies that the 10 second criterion does not apply during the monthly testing of the generator.
This standard contains requirements covering the performance of emergency and standby power systems providing an alternate source of electrical power to loads in buildings and facilities in the event that the primary power source fails.
Each step to last fifteen 15 minutes record engine and generator data as detailed later in this section.
Start and run the generator until the water temperature stabilizes.
Step load the generator with the load bank until the desired load is reached.
1 1 1 power systems covered in this standard include power sources transfer equipment controls supervisory equipment and all related electrical.
