OMICRON Magazine

WHEN AN OUTAGE IS COSTLY Efficient testing for ensuring fault-free high-speed transfer systems Industrial facilities use motors on production lines that need to run without interruption to avoid severe financial impacts on business. Motors can also be critical to the continuous operation of power plants. These large motors are designed with two separate infeeds and a high-speed transfer system (motor bus transfer – MBT) to ensure production continuity and avoid damage. This system is tasked with switching between the infeeds when required. RelaySimTest 4.1 can be used to ensure that the MBT system also works properly in all situations. Testing MBT systems during commissioning is challenging because the complex interplay between motors, infeeds, and loads must be simulated. The models must be able to accurately simulate the behavior of motors and the interaction of plant components during regular operation and faults. What happens to the voltage in the busbar if the infeed is disconnected? What happens when the new infeed is connected? RelaySimTest 4.1 reveals how the MBT system evaluates the method selection and execution used to transfer the old infeed to the new one and shows how the MBT system functions. An infeed transfer may be scheduled or may be required during an emergency. The busbar voltage’s behavior must be calculated accurately by the MBT system before switching to the new infeed. Firstly, this is the only way to ensure that the transfer does not cause any damage to the motor, the coupling, or the connected loads. Secondly, it ensures that the motors’ processes continue to run with as little interruption as possible. These 24