DC Hipot Test  | Test Precautions?

DC Withstand Voltage Test/DC High Voltage Generator - Test Precautions and Features? The test precautions and core features of the DC high voltage generator are as follows:

I. Test Precautions

1. Safety First, Reliable Grounding: Set up a safety warning zone. The equipment casing and grounding terminals must be reliably connected to the ground grid through a dedicated grounding wire (≥4mm²). Operation requires two people, one for supervision.

2. Standard Operation, Slow Voltage Increase: The voltage must be increased slowly and evenly (usually 1-2kV/s) to prevent charging current surges. Closely monitor the high voltage and leakage current values. If the microammeter reading increases sharply or the pointer swings, immediately reduce the voltage and stop the machine to investigate the cause.

3. Effective Discharge, Ensure Safety: After the test, the test object (especially cables, capacitors, etc.) must be fully discharged through the built-in discharge resistor before directly short-circuiting and grounding using a discharge rod. Direct contact with the equipment without discharge is strictly prohibited to prevent fatal residual charge.

4. Prevent Corona Discharge from High-Voltage Leads: High-voltage leads should use shielded wires and be kept away from grounding bodies to avoid corona discharge interference at the ends. When testing small capacitor samples, a filter capacitor must be connected in parallel at the high-voltage end to stabilize the output voltage.

II. Core Features

1. Stable Output, Low Ripple: Utilizing high-quality rectification and filtering technology, the output DC voltage ripple is low (typically ≤3%), providing a clean DC high voltage and ensuring test accuracy.

2. Comprehensive Overload Protection: Built-in overvoltage, overcurrent, and surge protection circuits provide rapid response. Some models feature flashover protection, quickly cutting off power in case of sample breakdown to protect the equipment.

3. Portable and Efficient, Multi-functional: Small size and light weight, easy to carry in the field. New digital devices feature automatic voltage boosting, data retention, and insulation resistance calculation functions, offering high integration and easy operation.

Summary: The DC high-voltage generator is a key device for DC withstand voltage and leakage current testing. Its core value lies in providing a stable and reliable DC high-voltage source, effectively detecting concentrated insulation defects. The essence of safe operation lies in "slow voltage boosting" and "complete discharge"; any negligence can lead to serious consequences. The ZGF 60kV/120kV DC high-voltage generator adopts an integrated design: the voltage multiplier and the main unit are housed in a single chassis. Combining the latest technology and components, it achieves advantages such as small size, high power, light weight, convenient operation, safety and reliability, and high-quality power output, making it an ideal testing instrument for the high-voltage testing industry.

The instrument is suitable for DC withstand voltage and leakage tests on equipment such as zinc oxide surge arresters, magnetic blowout surge arresters, power cables, transformers, and generators in power, railway, chemical, mining, metallurgy, and steel industries. It can also be used as a power source for electrostatic dust collection and spraying.

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