Reactive power compensation keeps the reactive energy a facility draws from the grid within the limits defined in the regulation, preventing reactive penalty charges. A poorly sized compensation system both perpetuates the penalty risk and shortens capacitor life. The problem usually lies not in the panel itself but in a stage design mismatched to the load profile.
Miratek does not pick a compensation panel from a catalogue; the facility's load profile and harmonic level are measured with a power analyzer, and the number of stages, capacitor ratings, and reactor requirement are determined from that measurement. In facilities with high harmonic pollution, detuned (harmonic-protected) reactor solutions are recommended. The process is run end to end, including installation, relay parameterization, and post-commissioning measurement verification.
Technical Scope Summary
| Voltage level | 400 V LV networks, MV compensation solutions on request |
| Compensation type | Conventional contactor-switched, thyristor-switched fast, and hybrid systems |
| Reactor option | Detuned reactor stages according to the harmonic level |
| Control | Stage management with an automatic reactive power control relay |
| Application areas | Industrial facilities, commercial buildings, pump stations, construction site supplies |
| Delivery model | Turnkey including measurement, design, manufacturing, and commissioning |
How We Work
Measurement and analysis
The load profile and harmonic level are recorded at the facility with a power analyzer.
System design
The stage structure, capacitor ratings, and reactor ratios are determined from the measurement data.
Panel manufacturing
The compensation panel is manufactured in the workshop in accordance with ventilation and thermal layout rules.
Installation and connection
The panel is installed on site; the current transformer and power connections are made.
Commissioning and verification
The relay is parameterized, the target power factor is verified by measurement, and the report is delivered.
Scope of Work
- Field measurement with a power analyzer and load profile analysis
- Stage design with capacitor, reactor, and contactor selection
- Compensation panel manufacturing and factory tests
- Revision and capacity increase of existing compensation systems
- Reactive power control relay parameterization
- Post-commissioning measurement verification and reporting
Frequently Asked Questions
We are paying reactive penalties — will a compensation panel definitely solve it?
Yes, provided the source of the penalty is pinned down by measurement. An inductive penalty calls for stage capacity, while a capacitive penalty usually requires a shunt reactor or a stage management solution. That is why we measure before quoting and design the solution to the penalty type on your bill.
Our capacitors fail frequently — what could be the cause?
The most common cause is harmonic pollution in the facility driving overcurrent through the capacitors; poor ventilation and loose connections also shorten their life. The harmonic level is established by measurement, and a switch to detuned reactor stages is recommended where necessary.
Is conventional compensation sufficient in a facility dominated by drive and UPS loads?
With these types of loads the harmonic level is usually high, and using capacitors without reactors is risky. Based on the measurement result, detuned reactor compensation is designed — together with a harmonic filter if required.
Quick Facts
- Category: Low Voltage Panel Services
- Turnkey delivery
- ISO 9001 quality assurance
