In a digitally transformed relay protection system, the relays instantly detect the fault and collect data regarding the fault location, fault magnitude, and fault type. Traditionally, relay protection schemes have relied on analog technologies, such as electromechanical and solid-state relays. While these systems have proven to be reliable. In utility and industrial electric power transmission and distribution systems, a numerical relay is a computer-based system with software-based protection algorithms for the detection of electrical faults. Such relays are also termed as microprocessor type protective relays. As technology advances and grids become smarter, the tools used to test and maintain these systems, such as the relay test set, are evolving to meet new challenges.
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Besides the basic functions of traditional television service, the DTMB allows additional services using the new television broadcasting system. DTMB system is compatible with fixed reception (indoor and outdoor) and mobile digital terrestrial television. • Mobile reception: is compatible with digital broadcasting TV in standard definition (), digital audio broadcasting, multimedia broadcasting, and data broadcasting service.
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