ÊÒÏÑÏ based on OKKEN construct design
ÊÒÏÑÏ - OKKEN unitized transformer substations of 160 - 1600 kVA power rating and of 6 (10) kV voltage are intended for input, transformation and distribution of electric energy – three-phase a. c. of 50 Hz frequency – and automation of changeover to standby or emergency power supply in case of normal supply source failure, with subsequent automatic reset to normal supply after voltage recovery.