$66.17
$121.09
Description The HTC 8250IN, 8251IN, and 8252IN Insulation Resistance Testers form a high-performance series tailored for professional electrical monitoring, diagnostics, and maintenance in industrial environments. These testers support insulation testing at selectable voltages ranging from 100 V up to 15 kV, offering measurement capability up to 50 TΩ, depending on the model. Designed for electricians, power plant engineers, commissioning teams, and utility inspectors, they combine advanced functionality with rugged portability. All three models share a streamlined interface utilizing a backlit 3½-digit LCD display (1,999‑count resolution) with clear large digits and intuitive icons indicating high voltage, low battery, and overload states. The devices operate efficiently with an auto power-off after 15 minutes, helping preserve battery life, while the inclusion of USB connectivity enables real-time data logging and monitoring via dedicated software—ideal for detailed testing workflows. Each model supports multiple standard test voltages: 100 V, 250 V, 500 V, 1000 V, 2500 V, and 5000 V. Across all voltages, the resolution is consistently 0.01 MΩ, delivering granular accuracy. The HTC 8250IN covers resistance up to 10 TΩ, the 8251IN extends to 35 TΩ, and the 8252IN reaches a substantial 50 TΩ, making it perfect for applications demanding ultra-high insulation resistance detection—such as power transformers, large motors, and high-voltage switching equipment. Their accuracy remains at ±(3% reading 5 digits) across all models and ranges. Beyond insulation resistance, the series performs DC voltage measurements up to 1000 V and AC voltage up to 750 V, both with ±(1.5% 5 digits) accuracy and resolutions of 0.1 V. They also support DC current detection down to 0.01 nA (up to 6 mA), enabling fine-grained leakage current analysis. For capacitance testing between 10 nF and 60 µF, accuracy is rated at ±(10% 5 digits), suitable for diagnosing capacitors and related circuitry. Polarization Index (PI) and Dielectric Absorption Ratio (DAR) measurements are built in, offering deeper insight into dielectric aging or moisture-related insulation degradation. Safety and robustness are integral: the instrument outputs a short-circuit current of approximately 6 mA, minimizing risks to sensitive circuits while delivering sufficient test stress. It meets IEC safety standards (IEC 61010‑1, IEC 61557‑1/5, IEC 60529 IP54, and CAT IV 600 V compliance). The case insulation provides resistance of over 50 MΩ between measuring lines and housing, and each unit is tested to withstand 3 kV AC between live inputs and chassis, per rigorous safety protocols. Build quality is field-ready: the testers weigh around 2.72 kg including batteries, supporting extended testing without interruption. Power consumption is efficient: 30 mA max in standby (backlight off), 42 mA with backlight on, and under 200 mA during measurement, supporting full-day site use. Devices operate reliably from –10 °C to 50 °C with humidity up to 85%, and storage conditions of –10 °C to 55 °C, offering consistent performance across environments. Each model comes fully equipped with a red high-voltage bar, test leads, USB communication cable, monitoring software CD, charger, certificate, user manual, and robust instrument box—ensuring professional-ready deployment without accessory gaps. Key Feature Summary: Model Variants: 8250IN: test up to 5 kV; 0.01 MΩ–10 TΩ 8251IN: up to 10 kV; 0.01 MΩ–35 TΩ 8252IN: up to 15 kV; 0.01 MΩ–50 TΩ Test Voltage Options: 100 V, 250 V, 500 V, 1 kV, 2.5 kV, 5 kV (plus 10 kV, 15 kV on higher models) Resolution: 0.01 MΩ, DC current down to 0.01 nA, voltage resolution 0.1 V Accuracy: Insulation ±(3% 5 digits); Voltage ±(1.5% 5 digits); Capacitance ±(10% 5 digits) Functions: Insulation testing, PI, DAR, DC voltage, AC voltage, DC current, capacitance Safety Standards: IEC 61010‑1, 61557‑1/5, 60529 IP54, CAT IV 600 V; housing ≥50 MΩ insulation Power Output: ≤6 mA test current; selectable output within ±10% of rated voltage Display & Connectivity: Backlit 1,999‑count LCD, USB data logging, high-voltage alert Power & Efficiency: Rechargeable power, auto-shutdown, low battery indicator Environmental & Physical: –10 °C to 50 °C operating range; ~2.72 kg weight; IP54 rating Typical Applications: These testers are designed for high-stakes electrical diagnostics such as: Testing insulation health in power transformers, generators, switchgear, and motors Performing preventive maintenance inspections to detect moisture-related or age-related insulation decay Evaluating very high resistance insulation systems (e.g. HV substations, medium-voltage cables) Conducting polarization index and dielectric absorption testing to evaluate insulation aging Voltage verification and leakage current checks before applying high test voltages Supporting in-field data logging and analysis via USB to archive test sessions or generate reports In summary, the HTC 8250IN / 8251IN / 8252IN series delivers industry-leading insulation resistance testing capability across multiple voltage levels and resistance ranges in a rugged and safety-compliant package. With built-in PI/DAR diagnostics, temperature/humidity compatibility, USB data support, and comprehensive accessories, these models fulfill demanding performance needs for maintenance, commissioning, and compliance testing across electrical installations and industrial infrastructure.
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