■ functional features

▲ select the specifications and models applicable to different power frequency interference intensity and line length according to the selection and configuration table of the test system: to meet the needs of AC power frequency parameter test of 0.2 ~ 1500km overhead line or cable line. Test the anti power frequency interference ability of the device: under the condition that the ratio of the device output signal to the power frequency interference signal is 1:20, output reliably and stably, accurately separate the power frequency interference signal and complete all test items.

▲ power supply: single phase AC 220V ± 10%, (10 ~ 40a) 50Hz ± 2%.

▲ test device protection function

● working power supply protection: when the input power supply of the instrument is wrongly connected to the 380V power supply, the overvoltage alarm indicator is on and the buzzer gives an alarm tone at the same time.

● device shell grounding and test grounding detection: when the device test grounding and shell grounding are poor, the device will send out alarm prompt characters and turn off the power output.

● equipped with emergency stop button to quickly cut off the power output in case of accident and ground the head end of the tested line to protect the safety of testers and equipment.

● other protection: the device has four kinds of protection: overvoltage, overcurrent, short circuit and overheating. The panel is equipped with fault indicator light to indicate the fault type.

▲ output characteristics of different frequency power supply:

● output frequency: 45Hz / 55Hz / 260hz constant frequency output frequency degree is better than ± 0.1%;

● output waveform: standard sine wave, with waveform distortion better than ± 2%.

■ technical parameters