Hand held DC system grounding fault tester PDF3000B

1、 Product Overview

At present, the core problem of DC power supply grounding fault detection in power system is large field interference. The measurement under different DC power supply and different working conditions has poor anti-interference, which leads to the mismeasurement and misjudgment of many products. This is the biggest disadvantage of this series of products and the most common phenomenon. The reason why our products can quickly gain a foothold in this market is that we have successfully solved the problem of interference. The instrument is developed and produced by using phase advance processing technology and data transfer algorithm technology. The instrument is between online type and portable type, the use method is portable, and the performance is online type. The instrument has the characteristics of high detection sensitivity, strong anti-interference ability, small volume, light weight, convenient use, etc. When finding the DC system grounding fault, it is not necessary to disconnect the power supply, and the grounding point can be located. The instrument can detect the grounding resistance value of DC system, and provide a reliable and high accuracy detection instrument for searching and locating the grounding fault of power DC system.

2、 Performance characteristics

1. The instrument is composed of transmitter and analyzer. The transmitter takes power directly from the bus without external AC or battery power supply, which makes the operation more convenient;

2. Solved all faults such as virtual grounding, high resistance grounding, multi-point grounding, single point grounding, small resistance grounding, direct grounding, mixed line grounding, loop grounding, capacitance grounding, alternating current grounding, transistor isolation grounding, etc;

3. Completely eliminate the DC system grounding fault, avoid the interference of large capacitors distributed on site, and accurately lock the fault in the minimum range and locate it;

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

5. DC systems below 300V 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 impact on relay protection, automatic device and operation circuit, and is safe to use;

7. Intelligent current clamp can automatically detect the opening and closing status of large and small current clamps, and the large and small current clamps have unified interfaces;

8. Be able to adapt to the grounding caused by AC and DC channeling, loop network power supply grounding, diode isolation power supply grounding, and high resistance grounding;

9. Be able to detect battery grounding fault;

10. Be able to detect the value of system capacitance to ground;

11. Be able to detect the DC grid voltage of the system;

12. Be able to detect 50Hz AC interposition fault;

13. No installation, no power cut, no wire swing, no wire disconnection, no insulation shake, and quickly locate the grounding fault;

14. Luxury outer package, easy to carry.

3、 Technical parameters

1. Transmitter

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

2) Voltage measurement range: 0-300V

3) Voltage measurement accuracy: ≤ 1%

4) Working mode of bridge: unbalanced bridge

5) Detection range of bus grounding resistance: 0-999.9k Ω

6) Measuring accuracy of bus grounding resistance: 0.1k Ω

7) Measurement accuracy of bus grounding resistance: ≤ 10% ± 2k Ω

8) Capacitance detection range (distributed capacitance): 1uF-200uF

9) Capacitance detection accuracy: ≤ 15% ± 2uF

10) 50Hz AC channeling detection range: AC 0V-280V

11) 50Hz AC channeling detection accuracy: ≤ 1%

12) Transmitting signal current: 0-10mA

13) Power consumption: less than 10W

14) Overall dimension: 163 × two hundred and fifteen × 66mm

15) Weight: 1kg

16) Applicable temperature: - 10 ℃± 50 ℃

2. Analyzer

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

2) Detection range of branch grounding resistance: 0-300k Ω

3) Measurement accuracy of branch grounding resistance: 0-100k Ω ≤ 10% ± 2k Ω

100-300k Ω display specific value

4) Capacitance detection range (distributed capacitance): 1uF-200uF

5) Capacitance detection accuracy: ≤ 15% ± 2uF

6) 50Hz AC channeling detection range: AC 0V-280V

7) 50Hz AC channeling detection accuracy: ≤ 1%

8) Leakage current measurement range: 0-100mA

9) Leakage current detection sensitivity: ≤ 0.1mA

10) Measurement accuracy: 100%

11) Alarm mode: data

12) Power consumption: less than 1W

13) Overall dimension: 163 × two hundred and fifteen × 66mm

14) Weight: 1kg

15) Applicable temperature: - 10 ℃± 50 ℃

16) Working power supply: lithium battery power supply (12V 3100mAh rechargeable)

3. Analyzer and transmitter

The analyzer and transmitter receiver use 2.4G wireless communication, with the same interface and synchronous display.