有沒有人可以幫我改一改文法&改通順一點??(英文好的請進)

你可以這樣寫,

NOK (Nordostschweizerische Kraftwerk) company is the supplier of electricity and offers power supply to the building and major equipment. Moreover, it also provides backup power for the hotel. Emergency power will be at once activated by the electric motors in case of temporary interruption in the power supply to the hotel.