Method for point on wave switching and controller therefor

In aspects, the present invention provides a method of performing point on wave switching in a multiphase electrical system (100) having a first circuit breaker (137) connected a first bus (120), the first circuit breaker (137) operated by a first controller (135), a second circuit breaker (197) connected to a second bus (110), the second circuit breaker (197) operated by a second controller (195), and a subsystem transferred from the first bus (120) to the second bus (110). The method includes receiving (210), by the second controller (195), system characteristics data of the subsystem, estimating (220), by the second controller (195), a time for switching based on the received system characteristics data of the subsystem and operating time of the second circuit breaker (197), operating (230), by the second controller (195), the second circuit breaker (197) at the estimated time for switching, for switching the subsystem.