Portable Withstand Voltage Tester

The MOEORW-WNY05 Portable Withstand Voltage Tester (also referred to as Portable AC/DC Withstand Voltage Tester, Portable Electrical Safety Performance Tester) is a next-generation portable insulation withstand voltage inspection device developed by our company in accordance with current national testing standards. This instrument is specifically designed for safety withstand voltage and leakage current testing of electric motors, electrical appliances, instruments, household appliances, and high-voltage power systems. Its purpose is to accurately assess the insulation performance of test objects, identify insulation weak points, and quantify the ability of test objects to withstand high-voltage stress. As a portable high-voltage test apparatus, the NY05 model satisfies the batch testing requirements of factory production lines while also accommodating mobile use scenarios such as laboratories and on-site inspections, making it a fundamental testing tool in electrical safety compliance verification processes.

The design and verification of the NY05 Portable Withstand Voltage Tester strictly comply with the following standards, ensuring that test results possess regulatory equivalence and industry-wide mutual recognition:

The above standards cover household appliances, medical devices, electronic components, information technology equipment, and various other industries. The NY05 can serve as a compliant testing tool for factory routine inspection and type testing across these sectors.

Accuracy Note: In the above error expressions, "reading" refers to the measured value currently displayed, and "3 digits" refers to the fluctuation range of the last digit. This notation is the industry-standard error specification method for electronic measuring instruments and is consistent with the error judgment rules in verification regulation JJG794-2004, facilitating calibration verification by third-party metrology institutions.

High-Contrast Numerical DisplayHigh-brightness digital tubes are adopted as display elements, with three independent windows simultaneously displaying voltage, current, and time. The wide viewing angle ensures clear readability under production line ambient lighting or outdoor strong sunlight, reducing judgment errors caused by misreading data.

Countdown Timing and Automatic ShutdownThe test time operates in countdown mode. When the timer reaches zero, the instrument automatically cuts off the high-voltage output and terminates the current test. This mechanism prevents over-voltage duration caused by manual operation delays, protecting test objects from over-stress damage while also reducing the risk of operators being exposed to high-voltage environments for extended periods.

Dual-Level Current Alarm SettingThe alarm current value can be continuously preset within the range of 0.2mA to 20mA. During testing, if the real-time leakage current exceeds the preset threshold, the instrument immediately triggers an audible and visual alarm and maintains a locked status. This design allows operators to perceive test results without constantly monitoring the screen, making it particularly suitable for high-speed batch testing on production lines.

Pure Sine Wave OutputThe high-voltage output waveform is a 50Hz standard sine wave with total harmonic distortion controlled at a low level. Compared with square wave or modified wave outputs, the sine wave more closely replicates actual power grid conditions, applying stress to the insulation system of the test object that is closer to real-world operating conditions, thereby enhancing the reference value of test results.

Critical Component SelectionThe core semiconductor devices, relays, and high-voltage capacitors within the internal high-voltage boost circuit and current detection circuit are all selected from internationally recognized brands with industrial-grade specifications. These components have undergone factory reliability verification for rated-life and temperature stability under specified operating conditions, ensuring that parameter drift remains within controllable limits during prolonged full-load operation.

Integrated Portable StructureThe entire unit features an integrated sheet-metal chassis with no external modules or detachable components. With compact dimensions of 315×285×175mm and a net weight of 8.76kg, a single person can complete handling and relocation. For users requiring multi-station rotational testing or outdoor field operations, this structural design significantly reduces equipment turnaround time.

Factory Withstand Voltage Testing for Household Appliance Production Lines

Apply high voltage between the primary power input and metal housing of products such as rice cookers, microwave ovens, electric fans, and washing machines, screening each unit for insulation breakdown risks to meet the factory inspection requirements of GB4706.1.

Safety Inspection of Medical Electrical Equipment

Perform ground leakage current and dielectric strength tests on medical electrical devices such as electrocardiographs, patient monitors, and ultrasound diagnostic equipment, verifying compliance with the mandatory patient and operator protection requirements of GB9706.1.

Incoming Component Withstand Voltage Screening

Apply high-voltage stress to components and assemblies such as power transformers, relays, optocouplers, and PCB insulation spacing, weeding out batches with insufficient withstand voltage capability in advance to avoid cost losses from scrapped finished goods after assembly.

Insulation Testing for Power Tools and Cables

Conduct insulation resistance and withstand voltage tests on electric drills, electric saws, power cords, plugs, and sockets, confirming that they maintain sufficient insulation margin even under abnormally elevated rated voltages.

Routine Inspection of Information Technology (IT) Equipment and Laboratory Instruments

Periodically verify safety compliance of computer power supplies, server cabinets, oscilloscopes, signal generators, and more in accordance with GB4943 and GB4793 requirements, suitable for quality inspection department sampling and post-maintenance safety confirmation.

Post-Installation Insulation Re-verification

On-site at distribution cabinets and large equipment installation sites, use the NY05 to re-test the insulation of already-connected circuits with high voltage, eliminating potential insulation damage caused during transportation and installation.

University Electrical Laboratories and Research Testing

Used in student laboratory courses for electrical engineering, automation, and related majors to verify breakdown voltage characteristics under different insulation materials and humidity conditions, while cultivating high-voltage safety operational practices.

This Portable Electrical Safety Performance Tester internally consists of three functional units:

• High-Voltage Boost Circuit: Steps up the mains voltage to the required test voltage value via a power-frequency transformer, with continuous and smooth adjustment achieved through the panel rotary knob;
• Leakage Current Detection Circuit: Current sampling components are connected in series on the low-voltage side of the high-voltage circuit (near the ground terminal), sending detection signals to the comparison circuit for real-time comparison with the preset alarm value;
• Numerical Indication Unit: Independently samples output voltage and leakage current values through separate channels, directly driving the digital tube display after analog-to-digital conversion, avoiding crosstalk errors caused by shared channels.
• Note on No-Load Leakage Current Reading: When the test is started with the high-voltage output terminal open (not connected to any test object), a minor value may appear on the current display window. This phenomenon results from the excitation leakage current of the high-voltage transformer itself coupling into the detection circuit through the core, which is an inherent characteristic determined by the transformer's physical structure. It does not affect the actual test accuracy after connecting a test object, nor does it constitute instrument malfunction or quality defect.