Industrial Power Quality Solution

Power quality that holds up when your facility actually runs.

Active harmonic filtering, reactive power compensation, and unbalance correction for steel mills, chemical plants, paper mills, and automotive facilities. From 50 kVA single modules to multi-megawatt SVGC installations.
After filtering
THDi < 5%
Power factor
PF 0.99
Voltage classes
5
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SinL Pro Series module front view with display panel and ventilation (3)
SinL Pro Series module front view with display panel and ventilation (6)
SinL Pro Series Cabinet front view with display panel and ventilation (1)
SinL Pro Series Cabinet front view with display panel and ventilation (4)
The real cost of bad power quality

Four ways industrial sites lose money to power quality problems without realizing it.

Most industrial sites have power quality issues. Most don’t know how much they cost — the meter just reads what it reads. Here’s where the money actually goes.
Utility penalties for low power factor.
Most industrial tariffs penalize sites with PF below 0.9 or 0.95. A typical 5 MW mill running at 0.85 PF can pay $40,000-80,000 per year in PF penalties alone. SVG installation brings PF to 0.99+ and eliminates the penalty entirely.
Harmonics overheat transformers
Variable-frequency drives, arc furnaces, and rectifier loads inject 5th, 7th, 11th, and 13th harmonics back into the supply. Transformers run 10-15°C hotter than nameplate, cable insulation ages 2-3× faster, and capacitor banks fail prematurely. Active filtering removes the source of the heat.
Voltage flicker disrupts production.

Arc furnaces, large welders, and rolling mills cause sub-second voltage flicker that doesn’t trip protection but does cause: lighting flicker (operator complaints), VFD trips on sensitive lines, sensitive instrumentation errors, and weld quality variation. SVG with fast response stabilizes the supply.

Three-phase unbalance kills capacity.
Single-phase welders, asymmetric load distribution, and partial-line operation create 5-15% phase imbalance. The transformer’s usable capacity drops by 2-3× the imbalance percentage. Active unbalance correction restores full transformer capacity without rewiring loads.
Solution architecture

Two architectural choices, depending on your harmonic profile.

Industrial power quality has two distinct technology paths. Choose based on your dominant problem (harmonics vs steady reactive demand) and cost sensitivity per kVAR.

Path A · Pure active
AHF + SVG (Active Harmonic Filter + Static Var Generator)
Full power-quality flexibility from one platform: harmonic filtering, reactive compensation, and unbalance correction all delivered by the same hardware, software-configurable per slot.
  • Harmonic + reactive + unbalance from one product family
  • Adapts to future load changes via firmware
  • SinL Pro: 5 ms response (SiC) · SinE: 10 ms (IGBT)
  • Easy to expand modularly as plant grows
Best for
Harmonics > 8% THDi at PCC · mixed load types (VFDs + welders + motors) · reactive demand varies > 50% during operation · future load expansion likely.
Path B · Hybrid SVGC
SVG + Thyristor-Switched Capacitors
Capacitor bank handles bulk reactive cost-effectively. SVG handles the fast-varying portion (harmonics, voltage flicker, fast unbalance) plus fine-tunes the residual after capacitor switching.
  • 40-60% lower CapEx vs pure SVG for large reactive demand
  • Capacitors for bulk · SVG for precision
  • Integrates existing capacitor banks
  • Best $/kVAR economics at MVAR scale
Best for
Reactive demand > 1 MVAR continuous · stable load profile (steel mill at full production, paper mill) · cost per kVAR is a primary metric.
Recommended configurations

Three sized configurations covering 90% of industrial installations.

For specific harmonic surveys and bill-of-materials sizing, send 1 week of 15-minute interval data and a representative harmonic spectrum at the PCC.
Config A · Mid-size
200-1000 A AHF or 100-500 kVar SVG
Automotive supplier, mid-size chemical plant, food processing
  • AHF: 2-5 × SinE-AHF-100/150/200A modules in cabinet OR SinL Pro for high-density
  • SVG: SinE-SVG modules sized to reactive demand
  • Voltage: 400 V (most common) or 690 V for large motors
  • Form factor: Single SinE Cabinet (4 modules) or wall-mount
Typical use
Single substation site, factory floor with VFD-heavy or welding-heavy loads.
Config B · Large industrial ★
1000-4000 A AHF + multi-MVAR SVG
Steel mill, paper mill, oil refinery, automotive assembly plant
  • Cabinet: Multiple SinE or SinL Pro Cabinets (up to 12 modules per SinL Pro Cabinet)
  • Mixed: AHF + SVG slots configurable per cabinet
  • Voltage: 400 V / 690 V (most common at this scale)
  • Coordination: Multi-cabinet master-slave control
Typical use
Multi-substation industrial plants, large process facilities with mixed harmonic and reactive demand.
Config C · SVGC hybrid
Multi-MVAR · stable load profile
EAF compensation, mining concentrator, large paper mill
  • SVG: 30-50% of total — handles fast-varying portion
  • Capacitor bank: 50-70% via thyristor-switched capacitors
  • Controller: Coordinated for seamless capacitor switching
  • Voltage: 400 V / 690 V (MV step-down via dedicated transformer)
Typical use
Reactive demand > 3 MVAR continuous · stable production profile · cost per kVAR is a primary KPI.
Engineer FAQ

Questions our application engineers get most often.

AHF (Active Harmonic Filter) targets harmonic distortion. SVG (Static Var Generator) targets reactive power and three-phase unbalance. Most industrial sites need both functions — and SinL Pro / SinE modules can be configured as either via firmware (one product, two functions). For sites with predominantly harmonic problems (rectifier-heavy, VFD-heavy), AHF dominates. For sites with predominantly reactive problems (large motors, induction heating), SVG dominates. Mixed sites use both.
SinL Pro uses SiC platform — higher power density, 5 ms response, slightly higher cost per kVA. Best for sites where space is constrained (existing switchrooms with limited expansion room). SinE Standard uses IGBT platform — 10 ms response (sufficient for most industrial loads), 5 voltage classes (200-800 V), wider service network in Europe and India, lower cost. Both deliver same THDi reduction and PF correction; the choice is usually about footprint vs cost vs voltage class.

We need: (1) 15-minute interval power data from one operating week (or longer); (2) representative harmonic spectrum measurement at the PCC; (3) load list with dominant problem loads identified (VFDs, welders, arc furnaces, rectifiers).

For sites without measurement equipment, we offer remote harmonic survey services — connect a power-quality logger for one week, ship it back, we analyze and quote.

From contract to commissioned: typically 12-16 weeks for cabinet-integrated systems (most components factory-pre-integrated). 8-10 weeks for single-cabinet installations.

The longest single phase is usually the utility shutdown window for installation — we work with the site’s planned maintenance shutdowns when possible to minimize production disruption.

Almost always integrate, not replace. The existing fixed capacitor banks (or step-switched banks) continue to handle bulk reactive power. The new SVG retrofits in parallel, handling the harmonics, voltage stabilization, and fine-tuning that capacitors can’t.

Integration is straightforward — SVG monitors the bus voltage and current; capacitor bank controls stay independent. Total project CapEx is significantly less than full SVG replacement.

Resonance is a risk with passive (capacitor-only) filtering — capacitor impedance combined with transformer reactance creates resonance peaks. With active filtering, the filter monitors the network in real-time and actively avoids creating resonance conditions.

Pre-installation harmonic study (we do these as part of project engineering) identifies any potential resonance frequencies. Post-installation commissioning verifies no resonance is created.