At present, the core problem of DC power supply ground fault search in power system is large field interference. When measured under different DC power supplies and different working conditions, the anti-interference performance is poor, which leads to misdetection and misjudgment of many products. This is a shortcoming of this series of products and a common phenomenon. The reason why our products can quickly gain a foothold in this market is because they successfully solved the interference problem. The DC system ground fault tester (split type) is developed and produced using phase advance processing technology and data transfer algorithm technology. This product is between the two types of online and portable, the use method is portable, and the performance is online. The instrument has the characteristics of high detection sensitivity, strong anti-interference ability, small size, light weight and convenient use. When looking for a ground fault in the DC system, there is no need to disconnect the power supply, and the grounding point can be located. The instrument can detect the grounding resistance of the DC system, and provides a reliable and high-accuracy detection instrument for the search and location of the ground fault of the power DC system.

1. This instrument is divided into (transmitter) and (analyzer). The transmitter takes power directly from the bus, without external AC or battery power supply, and the operation is more convenient;

2. It solves the virtual grounding with poor insulation, high resistance grounding, multi-point grounding, single-point grounding, low resistance grounding, direct grounding, mixed line grounding, loop grounding, capacitor grounding, channeling AC grounding, transistor isolation grounding, etc. All failures;

3. The ground fault of the DC system is completely eliminated, free from the interference of large capacitors distributed on site, and the fault is accurately locked in a small area and located;

4. Accurately detect the magnitude of the leakage current of the line, and quickly and accurately locate the fault point according to the magnitude of the leakage current before and after the ground fault point;

5. DC systems below 250V share a set of DC grounding detectors, and there are no other special requirements for DC voltage;

6. Signal output power: <0.15W, with built-in current limiting protection, which has no influence on relay protection, automation devices, and operating circuits, and is safe to use;

7. Intelligent current clamp, automatic detection of the open and closed state of large and small current clamps, unified interface of large and small clamps;

8. It can adapt to grounding caused by AC and DC channeling, ring network power supply grounding, diode isolation power supply grounding, high resistance grounding;

9. It can detect the ground fault of the battery; detect the value of the bus capacitance;

10. No installation, no power failure, no wire throwing, no disconnection, no shaking of insulation, fast positioning of ground faults;

11. Luxurious outer packaging, easy to carry.

1. Transmitter

①Working voltage: Take electricity directly from the bus (working voltage is 30V～280V)

②Voltage measurement range: 0-250V

③Voltage measurement accuracy: 0.5%

④The working mode of the electric bridge: unbalanced bridge

⑤Detection range of busbar grounding resistance: 0-999kΩ

⑥Measuring accuracy of busbar grounding resistance: ≤10％±2kΩ

⑦ Power consumption: less than 10W

⑧ Dimensions: 163×215×66mm

⑨Weight Amount: 1㎏

⑩ Adaptation temperature: -10℃±50℃

2. Analyzer

①Working voltage: 12V (working with lithium battery, working voltage is 9.6V～12.6V)

②Branch ground resistance detection range: 0-300kΩ

③Measurement accuracy of branch ground resistance: 0-100kΩ ≤10%±2kΩ

100-300kΩ Display specific value

④Leakage current detection sensitivity: less than 0.1mA

⑤Measurement accuracy: 100%

⑥Alarm mode: data

⑦ Power consumption: less than 1W

⑧ Dimensions: 163×215×66mm

⑨Weight: 1kg

⑩ Adaptation temperature: -10℃±50℃

⑪Working power supply: Lithium battery power supply (12V 3100mAh rechargeable)