Hioki VT1005 – AC/DC High Voltage Divider (For use with PW6001, PW3390, PW8001 Power Analyzers)

• Use with Power Analyzers PW6001, PW3390, and PW8001 to measure for high voltage measurements from inverters used in industrial equipment.
• Safely Measure High Voltages up to 5000 V
• Detect Efficiency Improvement Effects on the Order of 0.1%
• Max. Input 5000 V, 2000 V CAT II, 1500 V CAT III
• Measurement Accuracy: ±0.08% (DC), ±0.04% (50/60 Hz), ±0.17% (50 kHz)

AC/DC HIGH VOLTAGE DIVIDER VT1005

Safely Measure High Voltages up to 5000 V

Detect Efficiency Improvement Effects on the Order of 0.1%

Inverters used in rail and power system applications convert high-voltage power. To measure the efficiency of such conversions, it’s necessary to measure voltages of 1000 V and above. The VT1005 divides voltages of up to 5000 V and outputs them to a power analyzer. In order to measure the efficiency of high-efficiency inverters with a high degree of precision, you need to be able to measure power from DC to high frequencies accurately. Thanks to its excellent frequency flatness, the VT1005 makes possible accurate measurements at frequencies ranging from the fundamental wave to switching-frequency components. The VT1005 must be used with a PW6001, PW3390, or PW8001 power analyzer.

Max. Input 5000 V (*1), 2000 V CAT II, 1500 V CAT III

Generally, a power analyzer alone cannot directly measure voltages above 1000 V (AC). With the VT1005, large voltages of up to 5000 V can be accurately measured with a power analyzer.

The VT1005 can measure voltage with excellent accuracy across a broad band of frequencies. Accuracy is 0.1% or less at DC and commercial frequencies (50/60 Hz). In addition, the device can measure the most commonly used switching frequencies (10 kHz or less) and the switching frequencies of inverters that use SiC power devices (from 10 kHz to 50 kHz) with a high degree of accuracy.

Active power on the output side of inverters includes not only the fundamental component but also switching components. In order to measure the efficiency with a high degree of precision, you must be able to accurately measure not only the fundamental component but also the switching components.

Active Power Spectrogram for an Inverter’s Output Power

High-voltage differential probes have a broad frequency band, but measurement error on the order of several percent occurs within that band. Thanks to high accuracy and excellent frequency flatness within its frequency band, the VT1005 makes it possible to detect efficiency improvement effects on the order of 0.1%, a task that has been impossible until now.

Comparison of High-Voltage Differential Probe and VT1005

Comparing the noise resistance measurement result of an inverter’s secondary side.

The VT1005 is highly resistant to both common-mode and high-frequency noise, allowing it to measure voltage accurately even in noisy environments. Since conversion devices like inverters are sources of noise, noise resistance is important in efficiency evaluation.