What are the precautions for the grounding down lead continuity tester? What to do if you encounter

2. During the test, please confirm that the equipment under test has been powered off and disconnected from other live equipment.

3. The instrument must be reliably grounded in use.

4. When replacing the fuse tube and accessories, please use the same model as this instrument.

5. When the instrument is not in use, it should be stored in a ventilated, dry, cool and clean place, and pay attention to moisture-proof and corrosive gases.

Workaround for encountering failures:

Symptom Troubleshooting.

There is no response after powering on, and the LCD screen has no display.

Check for AC power.

Check the power cable.

Check that the fuse inside the fuse base is not burned.

During the test, the resistance value is displayed significantly or displayed as 1 (out of range), check whether the measured resistance value is too large.

Check whether the voltage input line is connected to the inside of the current output line.

Product Overview. Whether the grounding down conductor of the power plant and substation is well connected with the grounding grid, and whether the grounding electrode of the grounding network is intact is very important for the safe operation of the power system. In the "25 Key Requirements for Preventing Major Accidents in Electric Power Production" of the former State Power Corporation, it is required to measure the conduction status of the grounding down wire and grounding grid of the power plant and substation in the effective grounding system once a year.

By analyzing and comparing the changes of the previous measurement results, the degree of corrosion of the grounding down wire and the grounding grid is judged to decide whether to excavate or not. In response to this requirement, our company has researched and developed the EDTDY- type electrical equipment ground network continuity detector, which can quickly and accurately measure the resistance value between the two grounding down wires, and compare it with the previous data to more accurately reflect the corrosion degree of the grounding down wires, so as to detect and eliminate the hidden dangers of accidents as soon as possible.

"Grounding down conductor continuity tester" is used for the continuity detection of the connection part of the power equipment and the ground grid in the engineering test of the power sector, with an output current of 10A, which is the current output value specified in the national standard, and the national reference standard: DL T475-2006.

At present, there are many manufacturers of "grounding down wire continuity tester", and it is not expensive. The reason is that the technical content of this product is not very high, buy a 10A constant current source, add a circuit board, and you can make it. At present, there are two main types of "grounding down conductor continuity testers" on the market:

One is the "GYDT-III Grounding Down Lead Continuity Tester", which is a basic type, with an output current of 10A, a range of 0-1999 m, and the basic functions can meet the national standard. The other is the "GYDT-II Grounding Down Lead Continuity Tester", which is an extended model that subdivides the current into four gears, 1A, 2A, 5A, and 10A.

Measuring range: 0-1999 m. The purpose of the subdivision current is to increase the range of the resistor, but the test continuity value is still 10A.

Some manufacturers increase the current to 20A, which does not meet the national standard, is undesirable, and has no practical significance.

The electrical integrity of the grounding device refers to the electrical connectivity between various electrical equipment, the parts of the grounding device and the equipment that should be grounded in the grounding device, that is, the DC resistance value, also known as the electrical continuity. The reliable and effective connection between the grounding conductor of the power equipment and the ground grid is the fundamental guarantee for the safe operation of the equipment. In the long-term operation process of power equipment, the connection may be affected by factors such as moisture, and the node rust and even fracture may occur, resulting in the increase of resistance of the connection point between the grounding lead wire and the main grounding network, so as to fail to meet the requirements of the power regulations, so that the equipment has unsafe hidden dangers in operation, and in serious cases, it will cause the equipment to lose ground operation.

The reliable and effective connection between the grounding conductor of the power equipment and the ground grid is the fundamental guarantee for the safe operation of the equipment. In the long-term operation process of power equipment, the connection may be affected by factors such as moisture, and the node rust and even fracture may occur, resulting in the increase of resistance of the connection point between the grounding lead wire and the main grounding network, so as to fail to meet the requirements of the power regulations, so that the equipment has unsafe hidden dangers in operation, and in serious cases, it will cause the equipment to lose ground operation. The newly promulgated "Preventive Test Regulations for Electrical Safety Equipment" requires that the DC resistance test of the portable short-circuit grounding wire and personal protection grounding wire must be done on a regular basis.

The Ground Down Lead Continuity Tester is a highly automated portable tester designed to measure the DC resistance of portable short-circuit grounding wires as well as personal protective grounding wires. The instrument adopts high-performance single-chip microcomputer control, which can realize the intelligent testing process, simple and convenient operation, high precision, fast test speed, good retest, intuitive reading, and is an ideal special instrument that meets the requirements of the regulations, which greatly facilitates the development of test projects and improves work efficiency.

This product meets the requirements of the national standard GB6587-86 "General Outline of Environmental Testing of Electronic Measuring Instruments" and GB6593-86 "Quality Verification Rules for Electronic Instruments".