Looking for the technical specifications of Smart Loop Resistance Tester ?

XGHL-200 Smart Loop Resistance Tester.

Executive standard: DL loop resistance measurement is an important part of electrical testing, according to the requirements of the "Power Equipment Handover and Preventive Test Regulations", the measurement of conductive circuit resistance of various switchgear, the test current shall not be less than The loop tester is suitable for high-precision measurement of high-voltage switch contact resistance (loop resistance), and is also suitable for other occasions that require large current and micro resistance measurement. Loop resistance tester is widely used in electrical manufacturing departments, power operation departments, scientific research units and colleges and universities.

Loop Resistance Tester - Features 320 240 LCD Monitor, High Speed Thermal Printer. This instrument has the characteristics of small size, light weight, strong anti-interference ability, high precision, convenient operation and perfect protection function. Using the latest power supply technology, it can continuously output large current for a long time, and flexibly select four current ranges of 50A, 100A, 150A and 200A.

Using an operational amplifier for precision instruments and a high-precision quadruple integration AD converter, combined with a high-performance 16-bit microcontroller, the system automatically switches the amplification according to the signal size during measurement, ensuring the test accuracy of this product. This product is also designed with a real-time calendar clock to provide a time basis for printing and saving data. Data storage and historical data browsing function, which can store 200 sets of data, and has the function of power-off protection.

Ultra-wide measuring range, the maximum measurement range reaches 0-4m. Human-machine dialogue full keyboard operation mode, intelligent work process. Loop Resistance Tester - Technical Parameters Working Power Supply:

AC 220V 10% 50Hz 2% Ambient Temperature: 25°C 50°C Relative Humidity: 90%RH Output Current:

50A, 100A, 150A, 200A four gears optional Measuring range: 0 4m (50A gear) 0 2m (100A gear) 0 (150A gear) 0 1m (200A gear) Accuracy: Resolution:

Note: 500A 600A loop resistance tester can be customized according to needs.

At present, conventional double-arm DC bridges are commonly used in power systems to measure the DC resistance of transformer coils and the contact resistance of high-voltage circuit breakers, and the test current of this kind of bridge is only MA level, and it is difficult to find the defect that the conductor cross-sectional area of the conductive circuit conductor of the transformer coil is reduced. When measuring the contact resistance of the conductive circuit of the high-voltage switch, the measured resistance value is several times larger due to the influence of the oil film and the oxide layer between the dynamic and static contacts, which masks the real contact resistance value. According to the "DL T - 2004 People's Republic of China Electric Power Industry Standard Resistance Measurement Device General Technical Conditions.

Part 4: Loop Resistance Tester" stipulates that the measurement current of the contact resistance of circuit breakers and disconnectors shall not be less than 100A to ensure the accuracy of measurement.

The loop resistance tester is designed according to the latest power execution standard of the People's Republic of China DL, using a combination of high-frequency switching power supply technology and digital circuit technology. It is suitable for the measurement of the circuit resistance of switching control devices. The test current adopts the DC 100A recommended by the national standard.

The circuit resistance can be measured directly at a current of 100A and displayed digitally.

Also known as Contact Resistance Tester, Switching Loop Resistance Tester, Contact Loop Resistance Tester, Contact (Loop) Resistance Tester.

MEZC-305 loop impedance tester can test the loop L-PE, L-N, L-L loop short-circuit impedance and expected short-circuit current, the test can be measured by the two-pole method beam tremor small current (up to 42A) or by the four-pole method to measure the large current (up to 280A), which makes the MEZC-305 loop impedance tester has a very high accuracy and frequency, the test results can be stored in memory, and can be transmitted to the computer.

High current (max. 280A, 440V; 150A, at 230V) measures very low loop short-circuit impedance (RSC = medium current (max. 42A, at 440V; 23A, at 230V) and the short-circuit impedance of the loop (RSC=10).

High resolution of loop short-circuit resistors (up to.

Calculation of the expected loop short-circuit current.

Parameters of short circuits tested using the bipolar or quadrupole method.

AC voltage measurement.

Available at voltages 220 380V and 230 400V with a frequency of 45...65Hz in the grid.

It can be tested in short-circuit systems: phase-phase, phase-to-ground, phase-zero test.

The expected short-circuit circuit is automatically calculated.

When calculating the short-circuit current, it is possible to distinguish between phase current and line voltage.

Automatic range adjustment.

The length of the test cable can be changed arbitrarily without the need to recalibrate the instrument.

Serial computer connection port RS232

Memory for 990 test data.

Low battery display.

Automatically turn off the first slag coarse machine.

The loop resistance tester is a type of contact resistance tester.

The latest power implementation standard of the People's Republic of China DL, the domestic mshl technology of the loop resistance tester, are designed by the combination of switching power supply technology and digital circuit technology.

Main Specifications:

The minimum test value shall not be less than 100A, of which the 600A DC dual-channel high-speed 16-bit ΔAD sampling recommended by the national standard GB763 is recommended.

5-inch large-screen digital signal processing technology.

The highest resolution is reached.

At present, the best MSHL-100A B tester in China can achieve resolution, the test is very stable, and the performance has reached and exceeded the imported high-current microohmmeter. At the same time, it has a printer and automatic memory storage function.

Loop resistance tester test, suitable for the measurement of loop resistance of high-voltage switch control equipment. The instrument is required to measure accurately, have stable performance, and meet the requirements of on-site high-voltage switch maintenance and loop resistance test of high-voltage switchgear plant in power and power supply departments.

Technical reference "Polaris Power Forum".

In accordance with the latest standard "JJG1052-2009 Loop Resistance Verification Regulations", the national standard GB763, GB50150 and the power industry standard DL T596, the measurement of the conductive loop resistance of the circuit breaker is stipulated: the DC voltage drop method should be used to measure, and the current should not be less than 100A.

When the high current flows, the temperature of the contact point increases, which accelerates the oxidation of the contact surface, further increases the contact resistance, and if it continues, it will produce serious accidents, so it is necessary to measure the contact resistance frequently or regularly. The "Loop Resistance Tester" is suitable for testing the contact resistance of the main contacts of high and low voltage switches. The test current of the conductive circuit resistance test of various switchgear shall not be less than 100A.

At present, there are three main types of "loop resistance testers" in the market, which are:

1、“gy3a-100

"Loop Resistance Tester" output current 100A, range 1999, resolution 1. This "loop resistance tester" has a lot of use in the market, and it sells the best.

2、“gy3a-200

The output current of the "loop resistance tester" is available in 100A and 200A, with a range of 1999 and a resolution of 1This "loop resistance tester" is not used too much on the market.

3、“gy3a-600

The "Loop Resistance Tester" output current of 100A, 200A, 400A, 600A four currents are optional, the range is 1999, the resolution of this "Loop Resistance Tester" is the least used on the market, suitable for special occasions.

Technical Parameters of Loop Resistance Tester:

a. Technical indicators.

a. Measuring range: 0 1999

b. Resolution: 1

c. Measuring current: >100A 200A

DCD, measurement accuracy: level.

e. Display mode: LCD display, result printing.

f. Working temperature: -10 50

G. Working current: AC220V 10%.

H. Volume: 290 280 240

1. Use the special test line and test clamp attached to the instrument to connect the instrument and the test product, and all contacts must be firm and should not be loose.

2. Connect the AC220V power supply, turn on the power switch, the instrument is powered on, and enter the ready state, at this time, the ammeter on the instrument shows "000", and the meter shows "000".

3. After about 5 seconds, the status indicator points to the "hold" position, the instrument test result, and will automatically hold the test data until the next measurement.

4. Press the "Measure" button, the DC100A current output by the instrument passes through the sample, the ammeter displays the current value, and at the same time, the status display window in front of the ammeter points to the "Measure" position.

5. If you need to continue measuring, just press the "Measure" button again.

Use: 1. The instrument shall not measure the resistance of the inductive sample;

2. When the resistance of the sample is too large and exceeds the measurement range of the instrument, the table shows "1" as a normal phenomenon;

3. The sample should be in good contact with the pliers, and the dirt and oxide on the sample should be removed if necessary.

4. After a long period of continuous measurement, the temperature rise inside the instrument will cause the automatic protection circuit to be put into operation, which is manifested as the ammeter display is zero, and the meter display value jumps randomly, as long as the machine is shut down or stopped for a period of time, the measurement function can be automatically resumed.

5. If the current does not reach 100A, check whether the power supply voltage is too low. Test whether the forceps are in good contact with the sample.

Learn the test method of the loop resistance tester, demonstrate on site, intuitive and easy to understand, and quickly master.

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