MEJD-10A Grounding Downlead Conductivity Tester

MEJD-10A Grounding Downlead Conductivity Tester

1The purpose and characteristics of the instrument

The reliable and effective connection between the grounding down conductor of power equipment and the grounding grid is the fundamental guarantee for the safe operation of the equipment. The grounding down conductor is the connection part between power equipment and the grounding grid. During the long-term operation of power equipment, the connection may be affected by moisture and other factors, resulting in rusting or even breakage of the contact points, which can increase the resistance of the grounding down conductor and the main grounding grid connection point and fail to meet the requirements of power regulations. This poses a safety hazard to the equipment during operation, and in severe cases, can cause the equipment to lose ground and operate. Therefore, in the "25 Key Requirements for Preventing Major Accidents in Power Production", it is explicitly stated that the continuity testing of grounding device down conductors should be conducted once a year.

MEJD-10A Grounding Downlead Conductivity TesterIt is a highly automated portable testing instrument developed by our company, used for measuring the conductivity resistance between grounding down conductors of various power equipment in substations. The instrument is controlled by a high-performance microcontroller, which can achieve intelligent testing process. It has the advantages of small size, easy portability, simple operation, high accuracy, fast testing speed, good repeatability, and intuitive reading. It is an ideal specialized instrument that meets the requirements of regulations.

IIMain technical indicators

u Test current:10A、5A、3A、1A、0.3A、 Automatic transmission, with a total of six gears;

u Measurement range: 10A ：1.0mOh!0.6Ω

5A ：5.0mOh!2.0Ω

3A：10.0mOh!5.0Ω

1A ：30.0mOh!15Ω

0.3A ：100.0mOh!50Ω

automatic transmission:1.0mOh!50Ω

u Minimum resolution: 0.0001 μ Ω.

u Accuracy: ±(0.2%+1 μ Ω word).

u Display: LCD display, resistance display with significant digits 5 Position.

u Data storage:500Group.

u Working environment: ambient temperature0℃～40℃ relative humidity:<90%RH， No condensation.

u Power supply: built-in lithium battery,AC 220V±10V，50Hz±1 HzInsurance management2A.

u Maximum power consumption: 80W.

u Host size: length 243mm x width 154mm x height 103mm

u Host weight: Instrument: 3.8Kg.

u Test box weight: 8.5Kg.

threeFunctional characteristics

l The instrument adopts two power supply modes: ①AC100-240VPower supply; ② The internal lithium battery power supply of the instrument solves the problem of inability to test on site due to lack of power supply; Easy to use.

l The instrument has automatic testing function (blind testing), without the need to select the current gear;

l The testing process is controlled by the host and automatically completes self calibration, stable current judgment, data processing, and resistance display;

l Equipped with functions such as charging and battery level display, using high-capacity lithium batteries (12.6V/10A) to meet on-site testing requirements;

l Integrated packaging of instruments and testing lines, easy operation, fast measurement speed, and stable measurement data;

l Features such as high precision, anti-interference, shock resistance, and easy portability;

l Adopting a 5.0-inch 65K color LCD screen, intelligent touch, and Windows menu operation prompts;

l Built in large capacity non-volatile memory, capable of storing 500 sets of measurement data, which can be accessed at any time.

l Built in high-precision real-time clock function: capable of date and time calibration;

l Equipped with USB storage function;

l Equipped with timed shutdown function;