NR302B transmission line tester can accurately measure the power frequency parameters of various high-voltage transmission lines including positive sequence capacitance zero sequence capacitance positive sequence impedance zero sequence impedance mutual inductance and coupling capacitance phase-to-phase capacitance etc. The instrument adopts an integrated structure with a built-in variable frequency power module which can output power with variable frequency and voltage regulation. The use of digital filtering technology avoids the interference of power frequency electric field to the test and fundamentally solves the problem of accurate measurement under strong electric field interference.
 

Product characteristics

    ● Fast and accurately measuring the positive-sequence capacitance zero-sequence capacitance positive-sequence impedance zero-sequence impedance and other parameters of transmission lines it also can measure the mutual inductive reactance coupling capacitance and phase-to-phase capacitance between the lines.
    ● Strong anti-interference ability can accurately measure under the condition of the ratio between power frequency signal and pilot frequency signal is 1:10.
    ● External wiring is simple only one time to access the lead of the line to complete all the line parameters measurements. Completely solve the problems of the existing test methods which cause cumbersome wiring switching procedure and the interference of stability and accuracy.
    ● The instrument with high speed single chip microcomputer as the core to achieve the integration of test power meter and calculation model make a truck of equipment concentrated into a single instrument.
    ● The instrument uses 320*240 large screen dot matrix LCD operated with the rotating mouse imported from United States embedded mini-printer to print the results the operation is very simple.
    ● The instrument with high speed of test process and the test is automatically completed.
    ● High accuracy measurement the instrument provides three groups of pilot frequency power supply (45Hz/57.5Hz 45Hz/55Hz 47.5Hz/55Hz) and one group of power frequency power supply it can easily separate frequency and clutter effectively achieve high-precision measurement of small signals.

 

Power supply	Three phase AC 380V±10% 50Hz
Maximum output voltage	AC 200V Accuracy: 1%
Maximum output current	10A
Output signal frequency	45Hz/55Hz 47.5H/52.5Hz Interference current < 40A
Measurement range	Capacitance	Impedance	Impedance angle
	0.1-50μF	0.5-400Ω	0°- 360°
Measurement resolution	0.01μF	0.01Ω	0.01°
Measurement accuracy	0.1-1μF: ±3% ±0.05μF	0.5-1Ω: ±3% ±0.05Ω	±0.2° (voltage > 1.0V)
	1-50μF: ±1.5% ±0.03μF	1-400Ω: ±3% ±0.03Ω	±0.3° (voltage 0.2-1.0V)
Anti-interference parameters	Interference voltage: the longitudinal induced voltage after connecting to the test power: <350V; Interference current: when both ends of the line are short-circuited to ground <40A; The test can be completed stably and accurately under the condition that the ratio of the instrument output signal to the interference signal is 1:10.
Operating environment	Temperature: -15℃ ~ 40℃ Related humidity: < 90%.

 

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