Comparative Analysis of the HM2672 and HM2306 Insulation Resistance Testers
In the field of insulation resistance testing equipment, Goldhome's HM2672 and HM2306 models are designed for different application scenarios and each features distinct technical characteristics. The HM2672 emphasizes cost-effectiveness, strong anti-interference capabilities, and portability, making it suitable for routine insulation testing of high-voltage electrical equipment; the HM2306, on the other hand, focuses on higher voltage ratings and enhanced anti-interference capabilities, specifically designed for on-site insulation evaluation of large-capacity transformers and long-distance power cables in ultra-high-voltage substations of 220 kV and above.
I. Output Voltage and Applicable Range: Below 110kV vs. 220kV and Above
The HM2672 offers four voltage levels: 500V, 1000V, 2500V, and 5000V, with a measurement range of 0–19,990 MΩ, and is primarily used in power systems below 110kV. The HM2306 builds upon the standard model by adding 250V, 10,000V, and even 12,000V ranges, with a maximum resistance measurement range of 10 TΩ. It is specifically designed for on-site testing in ultra-high-voltage power systems of 220 kV and above.
II. Interference Immunity: 2 mA vs. 50 mA Induced Current
The HM2672 maintains testing accuracy even when interference current reaches 2 mA, making it suitable for on-site use with large-capacity transformers rated at 110 kV and above. The HM2306's interference immunity has been significantly enhanced to withstand 50 mA of induced current (AC 2000 V), ensuring stable operation even in extremely harsh testing environments such as ultra-high-voltage substations.
III. Output Load Capacity: 1.6mA vs. 5–10mA Short-Circuit Current
The HM2672 has a short-circuit current exceeding 1.6mA, with a voltage/load rating of 5000V/40MΩ. The HM2306 has a short-circuit current of approximately 5mA, with some configurations reaching 10mA. It offers greater output power and stronger load capacity, enabling faster charging of high-capacitance test specimens such as long-distance cables.
IV. Portability and Weight: 1.4 kg vs. 5 kg
The HM2672 measures 235 × 200 × 135 mm and weighs less than 1.4 kg, making it suitable for frequent on-site inspections. The HM2306 measures 385 × 298 × 196 mm and weighs approximately 5 kg; it sacrifices some portability in exchange for higher test voltages and stronger anti-interference capabilities.
Goldhome's Technical Expertise in Insulation Resistance Testing
(Goldhome Hipot), established in 2008 and located in the Wuhan Economic and Technological Development Zone, is a national-level high-tech enterprise integrating R&D, production, and sales. It has been honored with the titles of Wuhan "Science and Technology Little Giant" Enterprise and "Gazelle Enterprise." With nearly two decades of expertise in the high-voltage electrical testing sector, the company's product portfolio encompasses a full range of high-voltage testing equipment, including insulation resistance testers, comprehensive transformer test benches, partial discharge testing systems, and power frequency withstand voltage test units. These products are exported to over 30 countries and regions across Europe, America, Africa, the Middle East, and Southeast Asia.
Regarding its insulation resistance tester product line, Goldhome has established a comprehensive product portfolio. The HM2306 10kV model incorporates built-in FFT (Fast Fourier Transform) and AFC (Automatic Frequency Control) technologies to automatically identify interference and select the optimal measurement frequency. Equipped with a 5.7-inch large screen and an automatic discharge function, it delivers excellent repeatability, ensuring high precision, stability, and reliability in long-term measurements. The HM2672 features an aluminum alloy housing, an equipotential protection ring, and a fourth-order active low-pass filter design, providing effective shielding against external power-frequency interference and strong electromagnetic fields. Goldhome consistently adheres to the ISO 9001 quality management system standards, offering users a series of handheld and benchtop insulation resistance testers covering the full voltage range from 500V to 15kV, suitable for various on-site and laboratory testing scenarios.
