
Compensating capacitors
VARTRON Power Factor Correction Capacitors
Premium solution for perfect reactive-power compensation.
Need assistance with PFC dimensioning? Our specialists will help you optimise your power factor and shorten your return on investment.
Email: kbh@kbh.cz Tel: +420 777 730 002
1. Why choose VARTRON?
Service life up to 150 000 h ...
VARTRON Power Factor Correction Capacitors
Premium solution for perfect reactive-power compensation.
Need assistance with PFC dimensioning? Our specialists will help you optimise your power factor and shorten your return on investment.
Email: kbh@kbh.cz Tel: +420 777 730 0021. Why choose VARTRON?
- Service life up to 150 000 h with proper rating and cooling – up to 50 % longer than conventional MKP capacitors.
- Self-healing metallised polypropylene dielectric (MKP) – losses ≤ 0.2 W / kVAr and instant insulation recovery after local breakdown.
- Integrated pressure-sensitive disconnector plus internal fuse – prevents destructive failure at end of life.
- IP20 six-way terminal – safe and quick wiring with zero touch hazard.
- Overload capability: continuous current up to 1.8 × IN, short-term over-voltage +30 % UN.
- Next generation (2022): the improved VARTRON platform replaces the FORTIS II MKP series, delivering higher power density and enhanced protection.
2. Product Range & Key Parameters
Type | Output [kVAr] | Rated Voltage [V] | Duty Class | Ø × Height [mm] |
---|---|---|---|---|
VARTRON SD | 0.5 – 25 | 400 / 440 / 525 | Standard Duty | Ø60 – Ø116 × 210 – 290 |
VARTRON HD | 5 – 50 | 440 | Heavy Duty | Ø85 – Ø140 × 255 – 390 |
All variants: Δ-connection, 50 Hz, built-in discharge resistor, mounting stud.
3. Recommendations for 400 V Networks
Actual voltage in typical distribution systems can reach 420 – 430 V (±10 % tolerance).
- Without detuning reactors: select 440 V capacitors to avert sustained over-voltage stress.
- With detuning/reactor-protected PFC: always use 440 V capacitors to offset resonance-induced voltage rise and higher harmonics.
This simple practice extends capacitor life and reduces service interventions.
4. Standards & Certifications
VARTRON capacitors comply with IEC 60831-1/-2, EN 60831-1/-2, and UL 810, ensuring safe operation in industrial and commercial installations worldwide.
5. Typical Applications
- Low-voltage PFC switchboards
- Controlled capacitor banks with reactive-power controllers
- Electric drives with high reactive-power peaks
- Distribution boards exposed to harmonics (combined with detuning reactors)
6. Selecting the Right Capacitor
- Measure actual system voltage and THDi (total harmonic distortion).
- Determine required reactive power (kVAr) to achieve target power factor cos φ ≥ 0.95.
- Choose the rated voltage according to Section 3.
- Verify current rating and temperature class (-10 °C…+55 °C).