High Voltage Withstand Tester: Overview & Electrical Diagnostics

In the electrical and electronic manufacturing industries, ensuring the integrity of insulation systems is paramount for both product safety and operational reliability. The ZX267 Series High Voltage Withstand Testers (also known as Dielectric Strength Testers or Hipot Testers) are precision instruments designed to perform these critical safety evaluations. By applying a high voltage between conductive parts and the ground, these testers determine whether the insulation of a device under test (DUT) can withstand transient overvoltages without breaking down.

This series is specifically engineered for testing a wide range of equipment, including transformers, motors, cables, power meters, switches, and various electronic components. For technicians, understanding the specifications and capabilities of these testers is essential for implementing rigorous quality control and safety protocols.

Core Technical Features

The ZX267 series is built around a set of features that enhance both the accuracy and usability of high voltage testing:

1.Digital Metering & Display: All models feature digital displays for precise reading of output parameters.

2.Leakage Current Monitoring: The instrument provides a real-time digital readout of the leakage current of the DUT, which is the primary indicator of insulation health.

3.Programmable Timing: Technicians can set a test duration (countdown timer) from 1 to 99 seconds, ensuring standardized and repeatable test cycles. A "Manual" mode is also available for extended testing.

4.Adjustable Alarm Threshold: An alarm current value can be pre-set. If the leakage current exceeds this threshold during a test, the tester triggers an alarm, instantly flagging a potential insulation failure (breakdown or flashover).

5.Output Waveform: The output is a pure 50Hz sine wave, providing a standard stress profile that aligns with typical AC mains conditions.

Model Breakdown and Technical Specifications

The ZX267 series offers a variety of models tailored to different testing requirements, primarily differentiated by their output voltage type (AC or DC), voltage range, and power handling capacity. The table below provides a technical comparison for key models.

Common Technical Specifications Across the Series:

Output Waveform: 50Hz Sine Wave

Voltage Display Accuracy: ±5%

Current Display Accuracy: ±5%

Timing Range: 1~99 seconds (±5%) / Manual

Power Supply: AC 220V ±10%, 50Hz ±2Hz

Power Dissipation: ≤30W (static)

Technical Considerations for the User

1.Selecting AC vs. DC Testing: AC hipot tests are standard for products that will operate on AC mains, stressing the insulation in both polarities. DC hipot tests are often preferred for capacitive loads (like long cables), as they do not draw a large charging current continuously, allowing for a more manageable test. The ZX2672C model offers both, providing maximum flexibility.

2.Understanding Power Ratings: The output power (VA) indicates the tester's ability to drive capacitive loads without the output voltage sagging. For testing large motors or long cables with high capacitance, a model with a higher power rating, such as the 1000VA ZX2672C, is necessary to maintain test accuracy.

3.Interpreting Leakage Current: The measured leakage current is the small amount of current that flows through the insulation when a high voltage is applied. An unexpectedly high reading or a reading that exceeds the set alarm threshold indicates weak or failed insulation, which could lead to electric shock or short circuits during actual operation.

Conclusion

The ZX267 series of High Voltage Withstand Testers provides a robust and versatile solution for electrical safety testing. By understanding the distinct specifications of each model—from the basic AC/DC ZX2670A to the high-voltage DC ZX2674A—technicians can select the appropriate tool for their specific application. Adherence to the specified voltage levels, current limits, and timing protocols ensures that products meet rigorous industry standards for dielectric strength, ultimately guaranteeing safety and performance in the field.

 GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/