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SET Hybrid Power Factor Correction System, 400V, 50–900 kvar
Hybrid Dynamic Reactive Power Compensation

SET Hybrid Power Factor Correction System, 400V, 50–900 kvar

Model: SET-HYBRID-PFC-400

SET Hybrid Power Factor Correction System combines SVG and switched capacitor stages for 400 V industrial loads from 50 to 900 kvar, with ≤5 ms SVG response, harmonic control and three-phase load balancing.

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SET Hybrid Power Factor Correction System combines fast SVG compensation with economical switched capacitor banks in one coordinated cabinet. It is designed for industrial loads that include both steady reactive demand and rapidly changing load conditions.

The system provides dynamic reactive-power compensation, harmonic control and three-phase load-imbalance mitigation while keeping the bulk compensation stage economical. Final capacity, switching scheme and installation format are confirmed during project engineering.

Key Advantages

  • Cost-effective hybrid architecture: capacitor stages supply bulk reactive power while the SVG module handles fast changes.
  • Fast dynamic response: SVG switching and control frequency up to 25.6 kHz with response time ≤5 ms.
  • Multi-compensation: reactive power, selected odd-harmonic filtering and three-phase load-imbalance compensation.
  • Low-loss operation: system active loss ≤2.5% under rated conditions.
  • Flexible installation: embedded/rack, wall-mounted or floor-mounted cabinet formats.
  • Industrial communications: Modbus RTU, TCP/IP, dual RS485, CAN bus and Ethernet support.

Technical Parameters

Parameter Specification
Product type Hybrid SVG + switched capacitor power-factor correction system
Rated voltage 400 V (operating range 296–465 V)
Rated capacity 50–900 kvar
Main frequency 50/60 Hz ±5%
Circuit topology Three-level
Compensation modes Harmonic control, reactive-power compensation and three-phase load-imbalance compensation
Filtering range 2nd–51st odd harmonics, selective or full compensation
Harmonic reduction rate ≥97%
Filtering performance Typically THDi ≤5% at rated loads
Target power factor System PF >0.98 after compensation at rated capacity
Three-phase load balancing ≤5% negative- and zero-sequence current mitigation
Neutral-line filtering Up to 3 times the rated filtered current for four-wire devices
SVG switching/control frequency 25.6 kHz
SVG response time ≤5 ms
Capacitor control interface 16 ways
Capacitor switching Thyristor or contactor
Capacitor response time ≤1 s
Output current limit Automatically limited to 100% of rated output
Control algorithm FFT, adaptive control and reactive-power algorithms
Controller DSP + FPGA
Protection Hardware and software protection
HMI 4.3-inch, 7-inch or 10-inch touch TFT LCD
Noise <60 dB; <45 dB at low-speed operation
Installation Embedded/rack, wall-mounted or floor-mounted
Protection level Up to IP43
Cooling Speed-controlled intelligent air cooling with PWM fan
Cabinet colour RAL 7035 industrial grey
Ambient temperature −20 to +55 °C
Relative humidity ≤95%, non-condensing
Installation altitude Rated capacity up to 2,000 m; derating above 2,000 m
Compliance IEEE 519, IEC 61000, CE, type-test report and ISO 9001:2015
Communication Modbus RTU, TCP/IP, dual RS485, CAN bus, mobile APP and Ethernet

How the Hybrid System Works

The capacitor stage supplies economical stepped compensation for the stable part of the load. The SVG module continuously corrects fast reactive changes and can support harmonic and imbalance control. The controller coordinates both stages so that the capacitor bank is not forced to follow every rapid fluctuation.

Typical Applications

  • Steel, metallurgy and rolling mills
  • Cement, paper and process manufacturing plants
  • Ports, cranes, mining hoists and conveyors
  • Railway and airport substations
  • Industrial distribution systems with fluctuating loads

Application Scenarios

The SET hybrid power factor correction system is designed for facilities where steady reactive demand and fast load changes occur together. The capacitor stages cover the base kvar economically, while the SVG module responds to rapid changes, helping maintain power factor and stable power quality.

SET hybrid reactive power compensation system application scenes in automotive, textile, metallurgy, commercial building and new energy industries
Automotive, textile, metallurgy, commercial buildings and new energy. One hybrid cabinet platform can be configured for motor drives, welding and stamping lines, textile machinery, rolling processes, commercial-building HVAC and renewable-energy auxiliaries.
SET hybrid reactive power compensation system for industrial manufacturing, oil and gas, steel, mining, water treatment, commercial buildings and renewable energy
Heavy industry and infrastructure. For pumps, compressors, hoists, conveyors and other variable-speed or high-inrush loads, the SVG stage handles fast kvar changes while the capacitor bank supplies the stable portion of demand.

Typical project scenarios

  • Automotive and discrete manufacturing: welding robots, servo drives and stamping equipment create rapid reactive-power swings; fast SVG response helps keep the bus voltage and power factor within the project target.
  • Textile and process lines: spinning, weaving and finishing equipment benefit from coordinated compensation that reduces reactive losses without over-switching capacitor steps.
  • Metallurgy, steel, oil & gas and mining: rolling mills, furnaces, pumps, compressors, hoists and conveyors can combine large base kvar with dynamic load changes and harmonics.
  • Water treatment, commercial buildings and renewable energy: pump stations, HVAC systems, data rooms and inverter-based auxiliaries can use the configurable cabinet to support stable, efficient operation.

Final SVG rating, capacitor-step configuration, filtering range and enclosure format should be selected from the site load profile and power-quality measurements.

Cabinet Details at a Glance

Annotated internal structure of SET hybrid dynamic reactive power compensation cabinet
Integrated cabinet architecture. The illustrated layout shows the main busbar, circuit breaker, control and drive unit, thyristor switch modules, SVG power module and capacitor bank in one serviceable enclosure.

Selection and Installation Notes

  • Confirm the site voltage, frequency, wiring system and target power factor before selection.
  • Provide load profiles and harmonic measurements when harmonic filtering or imbalance correction is required.
  • Choose the capacitor step configuration and SVG capacity according to steady and fast-changing kvar demand.
  • Maintain ventilation clearance and install the cabinet in a clean, dry environment within the specified temperature and altitude limits.

Frequently Asked Questions

When should I choose a hybrid system instead of a pure SVG?

A hybrid system is suitable when most of the reactive demand is steady but a smaller portion changes quickly. The capacitor stage handles the bulk demand economically while the SVG covers dynamic fluctuations.

Can the system be supplied for other voltages?

This page describes the 400 V version with a 296–465 V operating range. Other voltage and cabinet configurations can be reviewed during project engineering.

Is harmonic filtering included in every configuration?

Harmonic-control functions are configured according to the project requirement. Final filtering range, capacity and measurement points should be confirmed from a site power-quality survey.

Request a Technical Proposal

Send us your system voltage, load capacity, target power factor, harmonic measurements and preferred installation method. SET engineers will confirm the configuration and provide a technical proposal.

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