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A static var generator is normally evaluated by reactive power capacity, response time, power factor control and harmonic compensation. In many installations, the equipment room adds another requirement: the solution must also control noise, dust exposure and maintenance demands.
YT Electric’s Fanless Static Var Generator uses natural heat dissipation instead of an internal cooling fan. The compact SVG platform provides inductive and capacitive reactive power compensation plus harmonic compensation from the 2nd to the 25th order.
The product model is YTPQC-SVG/xx-4-4L. The supplied datasheet lists 10 kvar and 15 kvar versions, AC 400 V ±15% operation, 50/60 Hz compatibility, and three-phase three-wire or four-wire connections.
The most visible difference from a conventional fan-cooled design is the cooling method. The video presents three practical effects of natural heat dissipation: quiet operation, less dust build-up around sensitive electronics, and fewer fan-related maintenance concerns.
The datasheet specifies ≤40 dB noise, IP20 protection, dimensions of 440 × 578.5 × 175 mm and a listed weight of 28 kg. These values support panel planning, but installers must still provide the required clearance, cable access and thermal space.
A facility can move between lagging and leading conditions as motors, transformers, UPS systems, capacitor banks and power electronic loads change state. The Fanless SVG supports both inductive and capacitive reactive power compensation within the selected rating.
The supplied data specifies PF≥0.99 as the reactive compensation reference. The achieved site result still depends on CT arrangement, measurement point, load profile, system voltage, available capacity and commissioning settings. DSP+FPGA control, a 4.3-inch or 7-inch LCD HMI, and Modbus communication over RS485 support local monitoring and system integration.
Reactive power compensation and harmonic filtering are different engineering tasks. A capacitor bank may correct part of a power factor problem, but it does not actively remove harmonic current. For rectifiers, variable-speed drives, UPS systems and other nonlinear loads, measure the harmonic spectrum before selecting equipment.
The datasheet specifies 2nd–25th order compensation, selective or full compensation, and maximum harmonic compensation capacity of 100% of rated capacity. It lists a harmonic filter rate of ≥95%. The achieved result depends on harmonic spectrum, source impedance, CT accuracy, system voltage and the capacity assigned to the harmonic load.
In the video, a Fluke power quality analyzer and the product interface show real-time reactive power compensation, power factor improvement toward 0.99, and harmonic filtering from the 2nd to the 25th order. The demonstration reports a filtering rate up to 95% with a response under 5 milliseconds.
A compensation device must react quickly enough to follow the load. The datasheet specifies total response time of ≤5 ms and instantaneous response time of ≤50 μs; these are different points in the control and compensation process.
Procurement teams should ask how response is measured, at which operating point, with which load waveform, and whether the selected capacity can deliver the required current. Measure normal operation, peak load, switching events and the conditions that cause the power quality complaint.
| Engineering consideration | Conventional fan-cooled SVG | YT Electric Fanless SVG design |
|---|---|---|
| Cooling method | Forced airflow through internal fans | Natural heat dissipation |
| Acoustic design | Fan sound depends on speed, airflow and contamination | Datasheet noise level ≤40 dB |
| Dust exposure | Airflow can draw dust through the enclosure and filters require attention | No internal cooling fan; installation environment still requires assessment |
| Fan-related maintenance | Fan and filter inspection may be required | Removes the internal fan as a maintenance item |
| Reactive compensation | Depends on the selected SVG control and rating | Inductive and capacitive compensation |
| Harmonic compensation | Depends on model and configuration | 2nd–25th order compensation; selective or full compensation |
| Communication | Depends on model | Modbus protocol via RS485 listed in the datasheet |
| Installation requirement | Forced-air clearance and filter access | Natural heat dissipation clearance and ambient-temperature check |
This table compares design considerations; engineers should compare the full datasheets, service conditions and commissioning requirements of the selected models.
| Selection item | Supplied product information | What the project team should confirm |
|---|---|---|
| Rated capacity | 10 kvar or 15 kvar | Measured reactive current, target PF and future load growth |
| Rated voltage | AC 400 V ±15% | Actual system voltage and voltage variation at the connection point |
| Frequency | 50/60 Hz | Local grid frequency and operating stability |
| Connection | Three-phase three-wire or three-phase four-wire | Neutral conductor arrangement and CT installation point |
| Harmonic range | 2nd–25th order | Dominant harmonic orders and whether selective or full compensation is required |
| Response | Total ≤5 ms; instantaneous ≤50 μs | Required dynamic performance and measurement method |
| Cooling and noise | Natural heat dissipation; ≤40 dB | Panel clearance, ambient temperature and acoustic requirement |
| Environment | -20–30°C; 0–95% RH, non-condensing; altitude ≤1500 m | Derating, enclosure conditions and site ventilation |
| Communication | Modbus via RS485 | BMS/EMS protocol map, cable route and address planning |
The datasheet states that higher ambient temperatures reduce output capacity. Above 1500 m, capacity is reduced by 1% for every additional 100 m. These limits should be checked before the order is finalized, especially for compact enclosures or high-altitude installations.
Begin with a power quality measurement rather than a transformer-size estimate. Record voltage, current, active power, reactive power, power factor and individual harmonic orders at the intended connection point, including capacitor banks, UPS equipment and filters in their operating states.
Confirm the connection type and CT arrangement: three-phase three-wire and four-wire systems require different measurement and compensation configurations. Check CT polarity, phase sequence and location. Finally, confirm natural-cooling clearance, HMI access, service conditions and RS485 requirements before panel fabrication.
No single compensation topology suits every installation. The fanless SVG is a strong candidate where 10 or 15 kvar capacity, low acoustic noise and natural heat dissipation match the measured requirement. Larger or more complex systems may require a different capacity range or a coordinated power quality system.
Yes. The supplied product information lists both inductive and capacitive reactive power compensation. The final operating range depends on the selected model, control settings and the measured system condition.
The datasheet lists 2nd–25th order harmonic compensation, with selective or full compensation. Engineers should still measure the site harmonic spectrum and select the compensation mode according to the dominant harmonic orders and the available rated capacity.
Confirm the measured kvar demand, target power factor, harmonic current, voltage, wiring type, CT position, ambient temperature, altitude and communication requirements. The 10 kvar or 15 kvar rating should be selected from measured operating conditions rather than from transformer kVA alone.
The Fanless Static Var Generator combines electrical compensation with installation comfort. Natural heat dissipation removes the internal cooling fan, while the specified ≤40 dB noise level supports applications where acoustic comfort matters.
The YTPQC-SVG/xx-4-4L platform provides inductive and capacitive reactive power compensation, 2nd–25th order harmonic compensation, PF≥0.99 reference performance, a listed harmonic filter rate of ≥95%, total response time of ≤5 ms, and system loss of ≤2.5%. The video demonstrates these functions with a power quality analyzer and the product interface.
For a project-specific recommendation, share voltage, kvar profile, harmonic spectrum, connection type and installation conditions with YT Electric. Our power quality team can review the fit and define the appropriate configuration.
Contact YT Electric for a Fanless SVG application review and project quotation.
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