Two-terminal Ground Loop Resistance Tester

Product Introduction

MOEORW-W5020TB Dual-End Grounding Loop Resistance Tester is a high-precision, digital switch testing instrument meticulously developed based on the relevant provisions of the People's Republic of China's power industry standard DL/T845.4-2019, leveraging its own technological advantages. This testing device is not only suitable for high-precision measurement of high-voltage switch contact resistance (loop resistance) but also supports single-end and dual-end grounding testing techniques. It eliminates the need to dismantle the grounding loop, ensuring a safe and efficient testing process. Dual-end grounding effectively prevents induced electricity generation, reducing electric shock risks and providing reliable safety assurance for maintenance personnel. The instrument delivers accurate measurement data with stable performance, meeting the requirements for on-site high-voltage switch maintenance by power and supply departments, as well as loop resistance testing at high-voltage switch manufacturers.

Product Parameter (specification)

2.1 Main Unit Technical Specifications
Test Current	50A/100A/150A/200A
Range	0μΩ to 80mΩ (50A); 0μΩ to 40mΩ (100A); 0μΩ to 20mΩ (150A); 0μΩ to 10mΩ (200A).
Minimum Resolution	0.01μΩ.
Measurement Modes
Traditional Resistance Mode	50A/100A/150A/200A;
Intelligent Test Mode	"Clamp Meter Direct Measurement Mode," "Single-Side Shunt Mode," "Dual-Side Shunt Mode."
Measurement time	Traditional resistance measurement mode
Fast/10s/30s/60s/Continuous;
Intelligent test mode	Fast/10s/30s/60s.
Measurement accuracy	Traditional resistance measurement mode;±(Reading × 0.5% + 0.2μΩ);
Intelligent test mode	±(Reading × 2% + 0.5μΩ).
Operating Voltage	AC220V±10%.
Operating Temperature	-10°C to 50°C.
Relative Humidity	≤90%RH, non-condensing.
Dimensions	36×29×16cm.
Weight	6.2kg.
2.2 Clamp Meter Technical Specifications
Measurement Method	Hall-effect clamp, non-contact measurement.
Measurement Range	DC 0 to 600A.
Measurement Accuracy	±(2% of reading + 0.5A).
Resolution	DC 0.01μΩ.
Display Type	LCD.
Power Supply	Built-in lithium battery.
Jaw Size	Φ68mm.

Product feature and application

• Features a high-brightness 7-inch color LCD screen with clear display, user-friendly interface, and sunlight readability.

• Entire unit controlled by high-speed chips, offering high automation and simple operation.

• Maximum output current reaches 200A, delivering rapid testing speed and high measurement accuracy.

• Integrates both "Traditional Resistance Measurement Mode" and "Intelligent Test Mode" to meet diverse application requirements.

• "Intelligent Test Mode" enables precise measurement of switch circuit resistance without disassembling the grounding busbar, saving time and effort while significantly reducing field workload. It also eliminates safety hazards to personnel and equipment caused by "false grounding."

• Comprehensive protection features including overcurrent, short-circuit, and overheat protection.

• Built-in large-capacity non-volatile memory stores up to 512 data sets, supporting review and export.

• Integrated high-precision clock displays real-time time.

• USB storage functionality.

• Equipped with an integrated thermal printer, allowing users to print measurement results via a dedicated button. Historical test data can also be printed.

• Integrated RS232 interface and Bluetooth for convenient data upload and remote control.

Prodection details

Designed for high-precision measurement of high-voltage switch contact resistance (loop resistance), supporting single/dual-ended grounding tests without disassembling the grounding loop. Ideal for on-site high-voltage switch maintenance by power and utility departments, as well as loop resistance testing at high-voltage switch manufacturers.

Company Qualifications

FAQ

1)What are the advantages of the intelligent test mode on the MOEORW-W5020TB Dual-End Ground Loop Resistance Tester?

Answer: The instrument's intelligent test mode includes three settings: clamp meter direct measurement, single-side shunt, and dual-side shunt. Its core advantage lies in enabling precise measurement of switch circuit resistance without dismantling the grounding busbar, saving time and effort while significantly reducing on-site workload. It also eliminates safety hazards to personnel and equipment caused by "false grounding," ensuring a safe and efficient testing process adaptable to various grounding scenarios.

2)Can the wireless clamp meter of the MOEORW-W5020TB Dual-End Ground Loop Resistance Tester only measure DC current? What precautions should be taken during use to prevent damage?

Answer: Yes, the wireless clamp meter of this instrument can only test DC current. Two points require attention during use: First, the measurement range is DC 0~±600A. Do not exceed the measurement range, as this may damage the clamp meter. Second, the clamp meter has a positive current direction (current flows into the front face). When calibrating the clamp meter, ensure the instrument's output current flows through the clamp meter in the positive direction.

3)What are the positioning requirements for the voltage test lead and current lead during wiring operations for the MOEORW-5020TB Dual-End Ground Loop Resistance Tester?

Answer: When connecting wires, ensure the voltage test lead is positioned inside the current lead. Before connecting or disconnecting test leads, the instrument must be powered off. Use only the dedicated test leads provided. Keep the leads fully extended during use; do not coil them to avoid affecting test results or causing safety hazards.

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