Manufacturing for CFD has been discontinued. As an alternative, please refer to G30, P346, P243, 869 or 889.

Type CFD22B high-speed, product-restraint relays are designed to provide percentage-differential relaying protection for the larger and more important machines. They are recommended for generators rated 2000 kVA and above and for motors and synchronous condensers rated 3000 hp (or kVA) and above.