Negative Phase Sequence Consulting
Diagnosing phase unbalances, mitigating torsional oscillations, and protecting heavy physical assets from destructive negative sequence currents.
The silent destroyer of rotating machinery
In three-phase power systems, phase unbalance creates a reverse-rotating magnetic field known as negative phase sequence (NPS) current. For large motors, generators, and transformers, these unbalances induce severe overheating, mechanical vibrations, and accelerated rotor degradation.
At Agulhas, we provide specialized consulting to isolate the root causes of negative sequence currents. By deploying advanced disturbance recording and analyzing unbalanced network components, we help facility operators prevent catastrophic infrastructure failure.
NPS Diagnostics
Isolating reverse phase currents before they induce irreparable thermal and mechanical stress on valuable plant assets.
Our Analytical Approach
Rigorous engineering methodologies designed to restore symmetrical voltage and current operations.
Symmetrical Component Analysis
We break down complex unbalances into positive, negative, and zero sequence components to accurately quantify the reverse-phase threat to your rotating equipment.
Load Redistribution
Identifying single-phase loads or asymmetrical network connections responsible for the unbalance, rebalancing circuits to restore electrical symmetry.
Protection Coordination
Reviewing and tuning numerical relay settings (ANSI 46, negative sequence overcurrent) to ensure your high-value physical assets are safely tripped before destruction occurs.
The Hidden Dangers of Unbalanced Power Networks
Read our comprehensive technical paper exploring how phase unbalances and NPS degrade equipment lifespans across heavy industrial infrastructure.
Concerned about negative phase sequences in your facility?
Get in touch with our engineering consulting team to discuss symmetrical component analysis, phase unbalances, or machinery protection.