DZ2200 series IEDs are based on years of practical application and operating experience, drawing on existing computer protection device at home and abroad advanced technology, developed a new generation of microprocessor-based protection and control devices launched. Widely used in electricity, water, petroleum, chemical and other industries 35KV and below voltage systems, all kinds of electrical equipment as the main protection or backup protection. DZ2200 series of devices for different customer needs and design. DZ2200 Series combines protection and control, communications, 35KV substation automation to meet the demand; DZ2200-I series is a simplified version of the device DZ2200 series, with perfect protection, while weakening the monitoring and communication functions. Both can be installed or focus group screen dispersed directly installed in the switch cabinet, with the communications management unit and control systems, but also a complete plant station automation system. For different objects to be protected, model classification DZ Series devices are: DZ2200 DZ2201 series IEDs capacitor circuit protection and monitoring device protection and control devices DZ2221 DZ2211 prepared from the cast and staging low-voltage transformer protection and monitoring device DZ2234 DZ2241 motor differential protection and control devices Motor protection devices DZ2242 DZ2251 PT comprehensive protection and control devices in parallel and integrated protection and control devices DZ2261