KVARBOX-S 25 kvar, 400 V, 3P4W

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+420 777 730 002 +420 777 730 004 kbh@kbh.cz

KVARBOX-S 25 kvar, 400 V, 3P4W

The KVARBOX-S 25 kvar Static Reactive Power Generator (SVG) is a device designed to compensate for reactive power in 400 V networks (both inductive and capacitive) and to correct three-phase imbalances. These are wall-mount modules that can be ...

Order number: 14025008

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KVARBOX-S Static Var Generator (SVG) is a basic model for power factor correction and grid balancing. This modern 3-level IGBT generator (SVG) is an ideal solution for precise and ultra-fast compensation of reactive energy (both inductive and capacitive). Unlike traditional capacitor banks, it eliminates the risk of overcompensation and grid resonance.

Thanks to DSP and FPGA control, the module responds to grid changes within 50 microseconds and reaches full capacity in less than 5 milliseconds. It is also capable of balancing 3-phase grids and asymmetry. It features a touchscreen display for easy management and supports parallel connection for straightforward power expansion.

Technical Specifications

Parameter	Specification
Harmonic filtration	Not supported
Nominal voltage	AC 400 V ±15%
Electrical connection	3-phase 4-wire (with N-wire support)
Hardware topology	3-level (3L) with IGBT
Control technology	DSP + FPGA
Total / Instantaneous response	≤ 5 ms / ≤ 50 µs
User interface	Touchscreen LCD display
Parallel connection	Up to 12 units
Thermal losses	≤ 2.5% to 3%
Communication	Modbus, RS485
Cooling & Noise level	Forced cooling, < 65 dB(A)
IP rating	IP20
Recommended operating temperature	-10 °C to +50 °C

KVARBOX-S Applications

Reactive power compensation (both inductive and capacitive) and 3-phase unbalance correction
Low-voltage substations
Manufacturing plants and production facilities
Buildings with variable loads
Applications requiring high power quality

KVARBOX-S is a reliable solution for power factor improvement, grid stabilization, and the elimination of reactive power penalties from your electricity distributor.

We will be happy to help you select the optimal solution, tailored precisely to your needs. We provide expert consulting, complete installation, and subsequent technical support.

Please send your inquiries and requests to our email: kbh@kbh.cz

Brand name	KVARBOX-S
Rated voltage [V]	400 V
Compensation power Q [kvar]	25
Communication interface	Modbus, RS-485
Height [mm]	485
Width [mm]	442
Depth [mm]	90
Weight [g]	25000
Mounting type	Wall-mount
Protocols	Modbus RTU
Relative humidity	5 % až 95 %, bez kondenzace
Connection	3P4W
Operating temperature	-10... +50 °C
Noise level [dB]	65 dB
Effective losses [W]	3 W
Degree of protection / IP rating	IP20
HMI display	4.3

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