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2026-08
What Is the Polarization Index PI? Why Is R600/R60 More Reliable Than Absorption Ratio?
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On the basis of absorption ratio DAR, HZJY-30KV can also automatically measure and calculate polarization index PI. If DAR is a "fast rough judgment" of insulation state, PI is a more in-depth "fine diagnosis" - the two use different time scales and are applicable in different si

What Is the Polarization Index PI? Why Is R600/R60 More Reliable Than Absorption Ratio?
2026-08
Built in Three-Phase Inverter Power Supply: Without Voltage Regulator, It Can Also Measure Three-Phase Transformers on Site
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In the past, when conducting transformer short-circuit impedance tests, a three-phase voltage regulator had to be prepared on site - it was bulky and heavy, and some remote substations could not be moved in at all. The design of HZ2611 with built-in three-phase inverter power supply has completely c

Built in Three-Phase Inverter Power Supply: Without Voltage Regulator, It Can Also Measure Three-Phase Transformers on Site
2026-08
Online Monitoring and Offline Discharge: How to Use the Two Major Functions of HZFD-200?
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Some battery testers on the market can only perform "capacity verification discharge," requiring the battery to be disconnected from the system for testing, while others only support online monitoring without assessing actual capacity. The HZFD-200 integrates both functions into a single d

Online Monitoring and Offline Discharge: How to Use the Two Major Functions of HZFD-200?
2026-08
Dual Compressor Refrigeration: The Technical Design Behind the Cold Bath's Ability to Reach -70 ℃
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The minimum temperature of HZBD-1177's cold bath reaches -70 ℃, far below the usage range of most engine coolants (usually below -45 ℃ is already an extreme requirement). The implementation of this indicator relies on the combination design of dual compressor refrigeration technology and anhyd

Dual Compressor Refrigeration: The Technical Design Behind the Cold Bath's Ability to Reach -70 ℃
2026-08
What Is an Impulse Voltage Generator? Why Must High-Voltage Equipment Undergo Lightning Impulse Tests?
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In the type testing and factory inspection of high-voltage electrical equipment, there is a test that appears "violent"—a high-voltage pulse lasting tens of microseconds is used to "strike" the device under test, observing whether the insulation can withstand it. This is the lig

What Is an Impulse Voltage Generator? Why Must High-Voltage Equipment Undergo Lightning Impulse Tests?
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