In modern industrial facilities, power quality is no longer a “nice-to-have.” It directly affects uptime, maintenance costs, and asset lifetime.
Non-linear loads (VFDs, rectifiers, switching power supplies) inject harmonics into the grid. The result is predictable:
- overheating of motors and transformers
- nuisance trips and unstable operation
- premature equipment failure
- penalties from utilities for poor power quality
To address this systematically, Passive harmonic filter PF01 engineered not only for compliance, but for long-term operational and financial stability.
Originally designed as an integrated option for Low voltage industrial drives AT24 and Oil production variable speed drives AK06, the PF01 is now available as a stand-alone solution, compatible with converters and power equipment from any manufacturer.
What the PF01 Really Does (in Practical Terms)
At its core, the PF01 suppresses current harmonics and stabilizes the grid using a proven L-type passive circuit (inductors + capacitors).
But in practice, this means:
- cleaner sine-wave current
- lower thermal stress on cables, motors, and transformers
- stable operation of sensitive automation equipment
- predictable behavior of protection systems
In short: less stress on your infrastructure, more usable life from your assets.
Engineering Depth That Matters
1. Compliance Without Guesswork
The PF01 is designed to meet the most demanding international standards:
- IEEE 519 - EN 61000-2-2 - UL 61800-5-1
To match real-world project requirements, the PF01 is available in three THDi performance levels:
- ≤ 5% THDi: for sensitive, high-precision installations - ≤ 8% THDi: balanced solution for most industrial facilities - ≤ 10% THDi: cost-optimized option for high-power, less critical grids This allows engineers to design precisely, not overpay “just in case.”
2. Stable Harmonic Filtering at Partial Load (Patented)
Most passive filters perform well at nominal load — and poorly everywhere else. The PF01 is different.
Its patented “Full & Half Power Mode” maintains declared THDi levels even when the load drops to 30% of rated power.
Why this matters:
- Pump and fan systems rarely operate at 100% load - Standard filters risk over-compensation and instability - PF01 stays effective across variable operating profiles Result: stable power quality during real operating conditions, not just in datasheets.
3. Works with Any VFD - Even Budget Ones
Not all drives are created equal. Many VFDs with thyristor rectifiers lack DC-link chokes, which breaks harmonic filtering logic.
The PF01 solves this with an optional output choke, ensuring:
- correct harmonic suppression - predictable behavior - full compatibility regardless of VFD brand or topology
For EPCs and operators, this means no vendor lock-in and no redesigns.
Why PF01 Makes Commercial Sense
1. Fast ROI Through Energy and Cost Reduction
- Efficiency > 98% at rated load - Reduced losses during partial-load operation - Lower heating of transformers and neutral conductors - Fewer utility penalties for poor power quality
In variable-load applications, total energy consumption can be reduced by up to 30% of nominal value. This is where the PF01 stops being a “filter” and becomes a cost-control tool.
2. True Plug & Play Installation
The PF01 is designed to minimize engineering hours on site:
- Ready-to-install industrial enclosures - Protection classes: IP00, IP23, IP54, NEMA 3R, NEMA 4 - Flexible cable entry (bottom or side)
Less commissioning time = lower project cost.
3. Power Quality Visibility - Not Blind Operation
Unlike basic passive filters, the PF01 can act as a power quality monitoring point. Optional integration with power meters (Datacom, Schneider, Acuvim) enables:
- real-time voltage, current, THDi, power factor monitoring - data transmission to SCADA via Modbus or Profibus - historical trend analysis for predictive maintenance
Operators don’t just fix problems — they see them coming.
4. Designed for Harsh Industrial Reality
- Operating temperature: –40°C to +55°C (optional forced cooling) - Bimetal temperature sensors in choke windings - Circuit breakers in capacitor branches
In case of a capacitor fault:
- the affected circuit is isolated - the process continues - the operator is notified
No cascade failures. No unnecessary shutdowns.
Conclusion: More Than Harmonic Filtering
The Triol PF01 is not just about meeting standards.
It is about:
- protecting capital equipment
- reducing operational risk
- lowering total cost of ownership
- keeping production running predictably
With wide voltage compatibility (380–690 V), patented partial-load efficiency, and built-in diagnostics, the PF01 becomes a strategic component of industrial power management, not just another box in the switchroom.
If power quality affects your uptime — PF01 affects your bottom line.
