Power energy availability is crucial for providing reliable power production for essential processes in power stations and industrial plants where lots of induction motors are applied. The E3-HSBT devices are designed to perform automatic high speed switching to a back-up power supply if the main feeder gets tripped.
In addition, the function takes into consideration the changing voltage and frequency of high power induction motors operating on the unsupplied busbar by controlling the moment of switching in order to avoid high current surges and mechanical stress for the rotating machines.
The IED includes wide range of control and supervisory functions which provide full control and user defined interlocking schemes for the primary switchgear at the substation
The E3-HSBT configuration measures three-phase voltages from each side of the handled circuit breakers. The main function is the High Speed Bus Transfer function - the configuration contains as many instances of it as many CBs there are to transfer between. Each configuration is unique according to the actual bus arrangement which may vary largely but still can be handled thanks to the highly configurable logic of the device.