This instrument is special for measuring distance between transformer and fault point, when there is permanent earthing (short-circuit) or open-circuit in overhead transmission line. It is suitable for those overhead transmission lines more than 10kV. Test will be done in the transformer substation. It can test out fault distance accurately so that serviceman can find the fault point very quickly. It can only be used after line power off. II Main features 1)High measuring precision: Adopts quick data sampling technology, A/D sampling speed is 100MHz, instrument reading resolution ratio is 1m, detecting dead zone is 1m. 2)High intelligence, testing result will be displayed in wave and data on large size LCD; Equipped with menu displaying, simple operation, no need special training. 3)Wave shape and data can be saved and recalled. 4)Dual-trace displaying, comparing normal wave and test wave of fault line 5)Wave enlarging function can change wave scale for accurate testing 6)Changing positions of dual cursors, and directly displaying direct distance or related distance between fault point and test point. 7)Velocity of propagation can be amended whenever necessary according to different transmission line. 8)Small size, portable type, with chargeable battery. III Main technical data 1)Suitable transmission line voltage: 10kV~500kV 2)Sweep frequency range: 100Hz~100KHz, in section 3)Measuring distance: 0~100km 4)Displaying method: Figure and words 5)Output voltage: More than 8V 6)Precision: 1% 7)Life of inside battery: 2~4 hours per charging 8)Charging current and duration: 100~200mA, 12 hours 9)Size: 260 x 350 x 190mm 10)Weight: 4.5kg
