DC Hipot Testers | Detailed introduction of technical principles

The principle of a DC withstand voltage tester is to apply a high-voltage DC current to the insulation of electrical equipment and accurately monitor its leakage current to determine the insulation performance.

During testing, the instrument outputs an adjustable DC high voltage (usually negative) applied to the test object. Under DC voltage, the capacitive charging current rapidly decays to zero, and in the final steady state, the current flowing through the insulation is only a leakage current in the microampere range. This current consists of both conduction current (reflecting the overall conductivity of the insulation) and absorption current (reflecting dielectric polarization and local defects).

By analyzing the absolute value of the leakage current, its trend with the applied voltage time, and the phase imbalance coefficients, it is possible to effectively diagnose whether the insulation is damp, aged, or has concentrated defects (such as air gaps or cracks). Compared with AC testing, DC testing equipment is lighter and causes less damage to the insulation, making it particularly suitable for on-site insulation testing of capacitive equipment such as cables, generators, and high-voltage capacitors. DC withstand voltage tester, DC withstand voltage tester, DC withstand voltage testing equipment 60kV 120kV 2mA 3mA 5mA DC withstand voltage tester. Utilizing an integrated design, the voltage multiplier cylinder and 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 power output quality, 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 blow-out 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.

1. The instrument is suitable for DC withstand voltage and leakage tests on equipment such as zinc oxide surge arresters, magnetic blow-out 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.

2. Stable Output Voltage: Employs a high-frequency voltage multiplier circuit, utilizing the latest PWM pulse width modulation technology and dual closed-loop feedback technology for voltage and current, improving power supply and load regulation, resulting in high voltage stability and low ripple. Smooth voltage regulation across the entire range ensures high output voltage accuracy. The main unit voltmeter directly displays the voltage value applied to the load, eliminating the need for an external voltage divider and simplifying wiring. Voltage resolution is 0.1kV, and current resolution is 1uA.

3. Comprehensive Protection: Features complete protection functions, including zero-position protection, overvoltage protection, overcurrent protection, and breakdown protection. The protection circuit uses nanosecond-level dedicated sensors, ensuring rapid and reliable operation, effectively protecting personnel and equipment safety.

4. 0.75U Function: Includes an intelligent, high-precision 0.75U function with a one-button button. Pressing this button automatically switches the voltage and current to the 0.75U state, facilitating the testing of zinc oxide surge arresters.

1. Integrated Specifications: 60 2 60 3 60 5 120 2 120 3

2. Rated Voltage (kV): 60 60 60 120 120

3. Rated Current (mA): 2 3 5 2 3

4. Rated Power (W): 120 180 300 240 360

5. Voltage Accuracy: ± (1.0% reading + 2 digits)

6. Current Accuracy: ± (1.0% reading + 2 digits)

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