| After-sales Service: | Online |
|---|---|
| Warranty: | 1 Year |
| Type: | 100A Loop Resistance Tester/Switch Contact Resista |
100a loop resistance tester/Switch contact resistance meter
Product overview
At present, the conventional QJ44 double-arm DC bridge is widely used in power system to measure contact resistance, but the test current of this kind of bridge is only mA level, and it is difficult to find the defect of reducing the cross-sectional area of the loop conductor. When measuring the contact resistance of the conductive circuit of the high voltage switch, due to the influence of the oil film and oxide layer between the contacts, the measured value is several times too large to truly reflect the contact resistance value. To this end, the Ministry of Power standard DL/ T845.4-2004 "General technical conditions for resistance measuring devices: Loop Resistance Tester and the new version of verification regulations JJG1052-2009 "Verification Regulations of Loop Resistance Tester and Direct Resistance Meter" stipulate that the measuring current of contact resistance such as measuring (isolation) switches and circuit breakers should not be less than 100A DC and the minimum current maintenance time should not be less than 60S to ensure accurate test results.
The operating panel of the instrument adopts ergonomic design, in line with operation habits, adopts high frequency switching power supply and digital circuit technology, which is suitable for the measurement of circuit resistance of switching control equipment. The test current is 100A DC recommended by the national standard. The circuit resistance can be directly measured at 100A DC, and the test results are displayed with a large-screen LCD, and there are data storage, output printing, time setting and other functions, and 50A, 100A gear for users to choose; The maximum setting time is 599S, which is larger than the 60S stipulated by the standard; It is a domestic contact resistance tester that can reach 0.01μΩ resolution and stability, and its performance is better than that of imported large current microohm meter. Meet the requirements of on-site maintenance of high-voltage switches in power and power supply departments and circuit resistance testing in high-voltage switch plants.
Design use
It is suitable for high precision measurement of contact (loop) resistance of high voltage switch, and also suitable for other occasions requiring large current and small resistance measurement.
100a loop resistance tester/Switch contact resistance meter
Executive standard
DL/ T845.4-2004 General technical conditions for resistance measuring devices: loop resistance tester
DL/ T596-1996 Code for preventive testing of electric power equipment
Sd301-88 AC 500kV electrical equipment handover and preventive test procedures
Jjg1052-2009 Verification regulation of loop resistance tester and direct resistance meter
DL/ T967-2005 Verification regulation for loop resistance tester and DC resistance rapid tester
100a loop resistance tester/Switch contact resistance meter
Performance characteristics
1. High current: The new switching power supply technology can continuously output large current for a long time, without the drawbacks of instantaneous current of pulse power supply, which can effectively break down the oxide film of switch contacts and obtain good test results.
2. High stability: under severe interference conditions, the last data of the LCD screen can be stabilized within the range of ±1 word, with stable reading and good repeatability.
3. High precision: The use of dual-channel high-speed 16-bit Σ-ΔAD sampling, digital signal processing technology, the highest resolution of 0.01μΩ, is the current domestic can reach 0.01μΩ resolution and stable contact resistance tester, the performance is better than the imported large current micrometer.
4. Intelligent: imported high-performance CPU, the measurement system automatically switches the range according to the signal size to ensure the test accuracy of the product. The overtemperature protection circuit can automatically stop the output current when the instrument exceeds the set temperature to ensure the safe use of the instrument.
5. High quality: The key components are imported components, and the influence of ambient temperature on measurement results can be effectively eliminated through the cleverly designed temperature compensation circuit. The use of military connectors enhances the anti-vibration performance.
6. Powerful function: current can be freely selected in 50A, 100A, test time can be set within 5s~599s, no other similar instruments can not set the measurement time or the continuous working time is too short defects.
7. Friendly man-machine interface: by rotating the mouse to input data, convenient and fast, you can set the instrument date and time, save the measurement data in real time, and print the measurement results in real time.
8.USB transfer: The measurement data can be transferred to the U disk through the USB interface, and the measurement data can be further analyzed and processed with the upper computer software.
9. Easy to use: small size, light weight, easy to carry.
| Measuring range | 0 ~ 2999.9μΩ |
| resolution | 0~99.99 0.01μΩ; 100.0 to 2999.9 0.1μΩ |
| test current | DC50A, 100A fixed output |
| measurement accuracy | ±(0.5% rd+2d) |
| continuous working time | 5s~599s |
| display mode | large screen Chinese LCD display |
| communication mode | U disk transfer |
| working power supply | AC220V±10% 50Hz |
| the machine power | 1200W |
| the maximum storage record | 200 |
| working environment | temperature -10ºC ~ 40ºC humidity ≤80%RH |
| Volume | 380×300×260 mm3 |
