Continental Controls Limited offers Electrical Protector for Three-Phase Hermetically Sealed Motor Applications. Continental Controls Limited is an ISO 9001:2000 registered organization that manufactures electrical protection and control devices. The Electrical Protector of 27-DN series is specifically designed for protecting the 3 phase refrigeration and air conditioner compressor motors from excessive winding temperature. It could also be used in 3 phase motor applications where environment conditions require hermetic seal.