Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of megger test instruments in China. If you're going to wholesale durable megger test instruments, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
Application Scenarios
Electrical insulation gradually deteriorates due to moisture, contamination, temperature fluctuations, aging, and continuous operating stress. Regular testing helps maintenance teams identify potential insulation problems before they develop into costly equipment failures. In industries where electrical reliability is essential, megger test instruments are commonly used to assess transformers, motors, power cables, electrical installations, and other insulated components. The series supports preventive maintenance and routine inspection by providing measurable insulation resistance values and time-based PI and DAR results. These measurements help technicians evaluate insulation conditions and compare results over time. For power utilities, industrial facilities, telecommunications sites, and electrical service providers, it can support maintenance planning and equipment condition monitoring.
Technical Parameters
|
Parameter |
Value / Specification |
|
Model |
NRG2705 (10 kV version) |
|
Test voltages |
500 V, 1000 V, 2500 V, 5000 V, 10000 V |
|
Resistance range |
0.01 MΩ – 20 TΩ |
|
Accuracy |
±5% reading (0.1 MΩ – 1 TΩ); ±20% (1 TΩ – 20 TΩ) |
|
Resolution |
0.01 MΩ (low range) to 0.1 GΩ (high range) |
|
Short‑circuit current |
≥5 mA |
|
PI / DAR calculation |
Automatic (up to 30 minutes) |
|
Leakage current range |
0.001 µA – 5 mA |
|
Display |
LCD with backlight, 5‑digit |
|
Data storage |
100 records |
|
Power supply |
Rechargeable Li‑ion battery (AC220V charger) |
|
Battery life |
~8 hours continuous test at 10 kV |
|
Dimensions (W×D×H) |
480 × 405 × 230 mm |
|
Gross weight |
7 kg |
|
Operating temperature |
0°C – 40°C |
|
Operating humidity |
<90% RH |
Products Features
The series combines a broad measurement range with practical functions for field technicians.
Depending on the model, users can select from multiple rated insulation test voltages, while the step-adjustment function allows finer voltage selection within the specified limits.
A large LCD with controllable backlighting improves readability in dim working environments. The instrument can store up to 500 measurement records, retrieve saved results, and transfer stored data to a computer through its USB interface for further review or printing.
Adjustable alarm thresholds provide audible and visual alerts when readings exceed configured limits.
Automatic power-off helps conserve battery energy, and the GUARD terminal can reduce the influence of surface leakage current when connected correctly.
The megger test instruments combined measurement and record-keeping capabilities offer additional operational convenience.
FAQ
Q: What equipment can it series test?
A: It is intended for insulation resistance testing of equipment such as transformers, motors, cables, and electrical appliances, subject to the selected model and its specifications. Like other megger test instruments, it must be used within its rated limits.
Q: Can it measure parameters other than insulation resistance?
A: Yes. Supported functions include AC voltage, DC voltage, DC current, capacitance, PI, and DAR measurement. This versatility distinguishes multifunctional it from basic resistance-only testers.
Q: How can measurement accuracy be improved?
A: Inspect the test leads, choose a suitable test voltage, maintain appropriate environmental conditions, and connect the GUARD lead when required, especially for very high resistance measurements.
Hot Tags: megger test instruments, China megger test instruments manufacturers, suppliers, factory, 3 Phase Low Resistance Ohmmeter, busbar contact resistance tester, digital clamp earth tester, switch resistance analyzer, three phase contact resistance tester, winding resistance testing system
