Power Quality & Distribution Units (PQ-PDU)

Internal schematic of an intelligent PDU with harmonic filtering and sub-metering

Smart distribution units designed for phase balancing, harmonic mitigation, and IEEE 519 compliance.

Project Overview

Unithium PQ-PDUs (Power Quality Distribution Units) are engineered to solve the 'Dirty Power' problem inherent in many industrial zones. Beyond simple circuit protection, these units perform real-time Phase Balancing to minimize neutral currents and prevent transformer overheating.

Each PDU is equipped with Class 1 high-speed monitoring that calculates the Total Harmonic Distortion ( $THD$ ) for both voltage and current:

THD = \frac{\sqrt{\sum_{n=2}^{\infty} V_n^2}}{V_1}

Where $V_1$ is the fundamental frequency (50Hz) and $V_n$ are the harmonic components. By keeping $THD_v < 5\%$ , we protect sensitive electronics from premature failure. The units also feature multi-stage Surge Protective Devices (SPD) capable of absorbing transients up to 40kA, providing a robust shield against atmospheric lightning and grid switching surges.

For facilities with a low lagging power factor, our PDUs can be configured with automated capacitor banks or active power filters to maintain $\cos \phi \geq 0.95$ , effectively eliminating utility penalties and reducing the apparent power ( $S$ ) demand on the system.