... Realize protection, measuring low-voltage line and controlling breaker GTL-84X Digital Line Protection Devices GTL-842 ... is implemented protection, measurement of low-voltage circuit and controlling breaker. Functional ConfigurationAccording to different functions, GTL-84X ... Yao volume collection of 16 letters, accident telesignalling √ Remote control circuit breaker division and √ IA, IC, P, Q, Uab, ...