Detecting with high resistance and high capacitance,Directly powered by DC system,Shown current direction, can detect loop fault

   

  DC earth fault locator was used in pinpointing the DC earth fault in power station and substation on live system. 

    Can detect system earth fault online, and improve the system's security.

    Applying very low frequency signal injecting and receiving technology, it greatly enhanced the capability of anti-distributed capacitance of system.

    Using accurate waveform analysis method, it improved SNR and current resolution with strong anti-interference.

    Using isolated programmable constant current source to inject small current signal into system, and ensure the test is safety and control. 

   Transmitter has the capability of AC crosstalk testing to prevent damaging the instrument.

   Transmitter has two power supply mode: DC and AC. When powered by DC, it doesn’t need external AC supply, directly powered by the system. Connection is easy and convenient.

Features:

Transmitter:Automatically detect and adapt to different levels of DC system voltage.Measuring positive and negative bus to ground voltage, earth resistance, distributed capacitance and balance resistance, etc. Automatically match the best frequency. 5 frequencies automatically or manually selected. Receiver:Automatically determine the ground state, shown the leakage current value. In the range, automatic warning with sounds and text. Indicating current direction to detect the loop earth fault. Shown the current waveform. Determine the ground state by observing the waveform, overcome the impact of distributed capacitance of the system.Using DSP technology, improved the detecting sensitivity, and can detect insulation fault up to 200KΩ.

l   Specifications:

Complete:Application of DC system voltage level: 220V,110V,48V,24VAnti-distributed capacitance value to ground: branch ≤22uF, total ≤150uFEarth resistance range:0-200KΩ@ system level is 220V; 0-100KΩ@ system level is 110V; 0-40KΩ@ system level is 48V; 0-20KΩ@ system level is 24V.Transmitter:Output frequency:2Hz,1Hz,0.5Hz,0.2Hz,0.1HzShort circuit current of signal:≤5mAVoltage withstand of output:400V DC shock Power supply:DC(220V,110V)or AC 220VVolume:195mm×112mm×65mm, Weight:0.80kg.Receiver:Detection sensitivity of current:0.5mAPower supply: Built-in 7.2V rechargeable lithium battery, 20 hours continuousVolume:195mm×112mm×45mm, Weight:0.55kg.Clamp:Power supply:2×AAbattery,20 hours continuousVolume:180mm×60mm×35mm, Weight:0.21kg

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