Customer Support

Because the transformer is the core asset of power supply, stability and efficiency are critical. Diagnosing and managing power quality before and after replacement—covering THD, unbalance, power factor, voltage fluctuation, and more—is essential not only for transformer reliability, efficiency improvement, and life extension, but also for customer asset management.

Depending on diagnostic scope, measurement items, rented equipment, manpower, and diagnostic period, the fee is calculated as:
Basic travel cost + (measurement unit cost × number of measurement points) + equipment fee + report service fee.

An active harmonic filter (APF) can typically attenuate target harmonic current by about 80–95%, and in many field applications can reduce overall current THD (THDi) from 25–45% down to the 5–8% range.
In particular, attenuation is typically 85–95% for the 5th and 7th harmonics, 75–90% for the 11th and 13th, and 60–85% for the 17th and above. (Triplen harmonics: 80–95%, with neutral compensation option for 3-phase 4-wire systems.)

It is determined after accurately measuring the harmonic current and harmonic current THD, then applying:
Target attenuation rate × harmonic current RMS × 1.2–1.3.

It is effective to install it at the PCC (point of common coupling) or the main low-voltage bus to integrate compensation across multiple distribution loads and manage TDD criteria. Installing it close to the load on a harmonic-generating line also enables focused compensation for specific processes or charger groups, improving perceived performance.

It is essential at sites with many nonlinear loads, including data centers, renewable-energy facilities, smart farms, logistics centers, hospitals, buildings, factory automation lines, and EV charging facilities.