Kongter’s K-3838 earth fault detector is the updated model which is developed to fast detect, trace and pinpoint virtual grounding faults on LIVE DC systems where electrical cables have breakage and current lost to ground. It will save you from long time unnecessary troubleshooting and helps to increase the reliability of your electrical equipments. Our unique technique makes it safe and fast to handle earth fault in DC systems that are working online. This device is widely used in different DC systems including power utilities, locomotive, telecom and etc.

Features

1. Safe to use
   For earth fault detection, the device uses low current of micro-amperes measurement signal and DC current clamp with high resolution. It has no interference to the tested systems.
2. High reliable designing
   It adopts main system of 32-bit micro-processor. Hardware designing strictly follows EMC standard to ensure reliability of itself and its tested systems.
3. Precise measurementIt
   Adopts high accurate current clamp for signal tracing and precise ADC for voltage sampling. This ensures the accurate measurement of voltage and resistance.
4. User-friendly interface
   It has LCD display with vivid information indicating grounding status, waveform, insulation leveling, insulation resistance, leakage current, and direction of earth fault and so on. This user-friendly interface makes it easy and effective to use onsite.
5. Intelligent measurement function
   • Signal analyzer can automatically identify system voltage leveling.
   • When insulation resistance has any change, signal analyzer could quickly indicate the change.
   • Distance will not affect the signal detection once the signal analyzer and detector are synchronized.
   • During earth fault detection, current clamp could either clamp on single cable or multiple cables for faster and more effective signal tracing.
   • Signal detector will indicate the direction of ground fault on screen once it detects any insulation problem.
   • Signal detector and analyzer have wireless communication. Complete measurement could handle different types of insulation problem in DC system.
   • Signal analyzer has different working modes like amplitude adjustment, frequency adjustment and waveform view which are suitable for different complicated applications.

Function

• Measures voltage between DC system and ground ranging from 0 to 300V.
• Measures grounding resistance up to 999KΩ for both busbars and each branch circuit
• It detects and measures AC voltage which interrupts in DC system. Detection range is from 0 to 288V.
• It performs the function as accurate current meter with resolution up to 0.01mA.
• Arrow indication effectively helps users trace the signal and pinpoint the earth fault.
• Waveform display for tested circuit, indicating insulation status and current changes in tested circuit, it help users fast and effectively locate the point with earth fault.
• It tests and displays distributed capacitance in the system in real time. This helps users bypass the interference for earth fault detection.
• Fast signal positioning for the point of earth fault for both negative and positive busbars with the help of waveform and signal direction.
• Signal analyzer has different working modes like amplitude adjustment, frequency adjustment and waveform view which are very helpful for earth fault detection in high resistance grounding.
• The analyzing function of signal frequency spectrum effectively helps extract the testing signal amplitude which makes measurement more accurate.

Technical Specification

Signal analyzer specification:

• Operation environment
  • Working power: DC40V-300V
  • Temperature: -20℃—55℃
  • Humility:0—90%
• DC voltage measurement
  • Measurement range:0-300V
  • Resolution: 0.1V
  • Accuracy: 0.2%
• AC voltage measurement
  • Measurement range: 0-300V
  • Resolution: 0.1V
  • Accuracy: 0.5%
• Insulation resistance measurement
  • Measurement range: 0-999.9KΩ
  • Resolution: 0.1KΩ
  • Accuracy: ≤±5%
• Measurement Bridge:
  • Adjustment range: 0mA, 0.25mA, 0.5mA, 1mA & 2mA
  • Frequency range: 0.125Hz, 0.25Hz, 0.5Hz & 1.0Hz
• Grounding detection range: up to 200KΩ
• Distributed capacitance measurement
  • Measurement range: 0-999uF
• Measurement waveform: square wave & sine wave
• Working mode: compulsory signal & automatic signal
• Display: 320×240 pixels TFT
• Power supply: powered by tested circuit
• Weight and dimension: 0.448kg, 200*145*75mm

Signal detector specification

• Grounding resistance measurement
  • Measurement range:0-500KΩ
  • Resolution: 0.1KΩ
  • Accuracy: ≤±10%
• Frequency spectrum analysis
  • Number of channel: 1
  • Frequency range: 0.125-12.5Hz
  • Resolution: 0.125Hz
• Display period of current waveform: 8s
• Measuring range for feeder: 0~2A
• Current measurement range: -100~+100mA
• Current resolution: 0.01mA
• Display: 320×240 pixel TFT
• Clamp jaw size: Ф30mm, Ф40mm and Ф10mm (optional)
• Power supply: 5V by 4 pieces of AA standard battery
• Weight and dimension: 0.303kg, 200**100*33mm

Wireless communication specification:

• Speed: 2Mbps
• Multi-frequency: 125 frequency points, suitable for multiple points communication and frequency hopping communication
• Very small size: built-in 2.4GHz antenna with dimension of 15x29mm
• Low power consumption: in answer mode communication, quick data transmission and starting time will effectively lower power consumption.

Applications

K-3838 Earth Fault Detector is widely applied in different DC system for ground fault location including:

• Railway and Transit: signal, communication, and locomotive electric equipment
• Power Utility: DC system with faulty grounding
• Industrial Facilities: electric safety equipment for general power distribution applications
• Telecommunication: electronic equipment with earth fault