DC Ground Fault Detector

At present, the core problem of dc power supply grounding fault detection in power system is the large field interference.Under different DC power supply and different working conditions, the anti-interference performance is poor, which leads to mismeasurement and misjudgment of many products. This is the biggest weaknesses of this series of products, and also the most common phenomenon.

The reason why our products can gain a foothold in this market quickly is because we have successfully solved the interference problem.This equipment adopts the technology of phase advance processing and data transfer algorithm .This product is between online type and portable type, the use method is portable, and the performance is online type,with high detection sensitivity, strong anti-interference ability, small volume, light weight, easy to use and so on. When find the grounding fault of DC system, there is no need to disconnect the power supply, to realized the location of earth point. It can detect the resistance value and grounding direction of the DC system.It provides a reliable and high accuracy detecting instrument for the grounding fault search and location of dc power system.

Hot tags : DC system ground fault detector,DC ground point location tester , DC earth fault tester .

1. This device included signal transmitter (analyzer) and receiver (locator), The analyzer takes electricity directly from the bus,no need external ac or battery power, more convenient in operation.

2. It has solved all the faults, such as high resistance grounding, multi-point grounding, single point grounding, small resistance grounding, direct grounding, mixed wire grounding, loop grounding, capacitor grounding, inter-channel AC grounding, transistor isolation grounding, etc.

3. Completely eliminate dc system grounding fault, free from interference of field distributed large capacitance, accurately lock the fault within the minimum range and position.

4. Accurately indicate the direction of earth signal current, voice explanation, quickly find the ground fault point.

5. Accurately detect the size and phase of the leakage current of the circuit, locate the fault point quickly and accurately according to the size and sudden change of the leakage current and phase before and after the grounding fault point.

6.Dc systems below 300V share a set of DC grounding analyzers, without other special requirements for DC voltage.

7. Output Signal Power：＜0.15W，built in limiting current protection.It has no influence on relay protection, automatic device and operating loop, so it is safe to use.

8. Ripple analysis and digital oscilloscope function: use the function of spectrum analysis, solve all kinds of interference signals,ａnd check the waveform information of various detection signals and loops.

9. Intelligent current pliers, automatic detection of current pliers open and closed state, large and small jaws are in common use .

10. It can be used for grounding caused by alternating and direct current channeling, ring network power supply grounding, diode isolated power supply grounding, high resistance grounding.

11. It can solve the alternating current fault of the same pole and the different pole, and select the alternating current fault branch.

12. It can detect battery grounding fault and test the bus capacitance value.

13.It can locate ground fault quickly without requirements of installation, power failure, wire swinging wire baffling, or shaking insulation.

14.Luxurious outer packing, easy to carry.

1. Signal transmitter (analyzer)

Working voltage: Directly take electricity from bus (working voltage DC 48V ~ 280V)

Voltage measuring range： DC 0-300V

Ac alternating current detection： AC 0-260V

Distributed capacitance detection: 0-500

Accuracy of voltage measurement : 0.5%

Operating mode of bridge： Unbalanced bridge

Detection range of bus grounding resistance：0-500 kΩ

Measurement accuracy of bus grounding resistance：≤10％±1kΩ

Power dissipation：≤10W

2.Receiver (locator),：

Power supply：12V（lithium battery,working voltage is DC 9.6V～12.6V）

Power supply for charger : AC 220V（1±20%）50Hz～60Hz or DC 90-260V

Detection range of branch grounding resistance: 0-300 kΩ

Ground resistance measurement accuracy: 0-100kΩ ≤10％±2kΩ

100-300kΩ display accurate data

Leakage current detection sensitivity: <0.1mA

Accuracy of measurement: 99%

Type of alarm： Voice, graphics, data, grounding direction

Power dissipation：<1W