Power Systems Plus can perform a load test on various sizes of generators up to 1500 kW. A load test is recommended to be performed annually and is a test that verifies the functionality of the generator under load. This test also clears out carbon deposits that build up in the exhaust and can result in the engine malfunctioning. A written report will be provided upon completion of each test.
We recommend a one and a half hour load test per year, per unit to properly maintain your generators. The NFPA 110 requires a load bank test be performed annually. The NFPA Code requires specific load bank testing for emergency units that service critical areas such as hospitals, care facilities and centers that provide life safety. Every three years a four hour load test is required to be in compliance for those Level 1 units. To find out what your requirements are check out our Guide to Understanding NFPA 110 (to be added soon, in the meantime, please contact us).
Load Tests are typically performed at the time of the annual or semi-annual service. These tests require set up of the load bank with cable connections to the generator or transfer switch depending on your configuration. The load test provides a resistive load to the generator. The technician starts the test with a low load and increases the load every 15 minutes until the nameplate capacity is reached. Readings are taken at each step and recorded on our load test form. The unit should be capable of reaching and holding the load. Reaching the max load on the unit also cleans the fuel and exhaust system. Just running the unit actually creates carbon deposits in the exhaust from not completely burned fuel that can cause low performance and valve failure.