1. Monitor
The control circuit monitors voltage and compares the measured output with the selected voltage setting.
KEVOR servo voltage stabilizer
20 KVA Servo Voltage Stabilizer
A 20 KVA servo stabilizer for cnc equipment and hvac loads, subject to actual load and supply conditions.
KEVOR / Servo voltage stabilizerConfigured for your load
Technical overview
20 KVA technical overview
Confirm the actual load and measured input range before ordering. Starting current and simultaneous equipment operation can change the required capacity.
Application examples are starting points, rather than capacity guarantees.
- Rated capacity
- 20 KVA
- Phase options
- Single or three phase
- Input-voltage selection
- Specified from measured site voltage and phase
- Standard nominal output
- 230 V AC single phase / 400 V AC three phase; custom output on review
- Calculated nominal output current
- 87.0 A single phase / 28.9 A three phase
- Cooling & duty
- Confirmed for the selected model, load and installation
- Operation
- Automatic servo-controlled voltage correction
- Correction principle
- Servo motor-driven voltage regulation
- Output tolerance & correction speed
- Stated for the selected input range, load and construction
- Duty, ambient & efficiency
- Model-specific operating limits and performance confirmed in the technical offer
- Three-phase arrangement
- Confirm phase correction, neutral arrangement and permitted imbalance for a three-phase order
- Protection & bypass
- Standard features and optional arrangements confirmed in the technical offer
- Installation
- Confirm enclosure, ventilation, service clearance and cable access
Current is calculated from rated KVA at 230 V single phase or 400 V three phase; it is not the maximum input current. Dimensions, protection and performance are confirmed for the ordered configuration.
Before the quotation
Three details. One useful conversation.
01
Show us the load.
Send the machine nameplate or share its electrical rating and supply phase.
02
Check the supply.
Share the measured low and high input voltage and the installation conditions.
03
Confirm the configuration.
Review capacity, cooling, protection, delivery and warranty in the written quotation.
Compare another capacity
Explore the servo range.
2 KVA3 KVA5 KVA7.5 KVA10 KVA15 KVA20 KVA25 KVA30 KVA40 KVA50 KVA60 KVA75 KVA100 KVACustom requirements
Need a different range or output?Worked example / Illustrative only
What does 20 KVA mean for a load?
A simultaneous electrical input of 12.8 kW at a measured power factor of 0.8 equals 16.0 KVA. Adding an illustrative 25% planning allowance gives 20 KVA.
This arithmetic is not a product recommendation or a motor-start allowance. Check starting demand, the load on each phase, the lowest input voltage and the machine’s supply limits before choosing capacity.
Try the KVA calculatorInclude it in your technical offer
Know which protections you are getting.
Ask which items are standard, optional or supplied by the installation contractor for your model.
- Low- and high-voltage cut-off
- Overload and short-circuit coordination
- Single-phasing protection for three-phase loads
- Phase reversal and phase imbalance monitoring
- Manual or automatic bypass arrangement
- Metering, alarms and restart behaviour
- Earthing and surge protection requirements
- Enclosure, ventilation and temperature limits
Servo voltage regulation
Sense the voltage. Adjust the correction.
A servo stabilizer raises low voltage or reduces high voltage within its specified operating range.
2. Adjust
The servo motor moves the regulating mechanism to increase or decrease voltage correction.
3. Regulate
Feedback continues as the supply changes. A large voltage correction takes mechanical movement; the controller’s reaction time and the complete correction time are different.
A conventional variac-based servo design uses a variable autotransformer, a buck-boost transformer and a servo motor. The regulating arrangement and component selection are confirmed for the offered model. Voltage regulation uses the available AC supply; battery backup and electrical isolation are separate functions.
Read the specification clearly
What the technical terms mean
Input range
The incoming voltage window for the selected configuration. Confirm whether full rated load is supported throughout that window.
Nominal output & accuracy
The target voltage and permitted variation under stated conditions. The nominal value alone is not a guarantee of regulation accuracy.
Correction speed
The rate of voltage correction, normally expressed in volts per second. It varies with the selected construction.
Response time
A defined reaction interval. It should not be confused with the time needed to complete a large mechanical voltage correction.
KVA and load current
Capacity must be considered with phase, voltage, simultaneous electrical load and motor starting demand. kW and KVA are not interchangeable.
Protection & bypass
Cut-offs, overload arrangements, phase monitoring and bypass are model-specific. Confirm the actual supplied features in the technical offer.
Air & oil cooling
Air-cooled construction transfers heat to the surrounding air. Oil-cooled construction uses insulating oil in its thermal design. Cooling must suit the load, operating hours, ventilation and ambient conditions.
Frequency & waveform
Voltage correction does not replace a frequency converter or harmonic filter. Check the permitted supply frequency and any distortion limits against the equipment requirements.
Duty & temperature
Continuous duty describes operation under specified conditions; it does not mean unlimited service life. Ambient temperature and temperature rise describe different measurements.
Efficiency & losses
Efficiency depends on the operating conditions and load. Ask which input voltage and load were used for the stated figure. Regulation alone does not establish an electricity-saving percentage.
Phase balance
Three-phase selection needs the load and voltage on each phase. Confirm independent phase correction, neutral requirements and permitted imbalance for the offered design.
Standards & test reports
A standard number should identify the relevant product and test scope. Request the applicable model documents instead of treating a catalogue reference as certification.
Questions, answered
Questions about 20 KVA selection.
Is 20 KVA suitable for my machine?
A 20 KVA rating does not establish suitability on its own. Check rated electrical input, phase, measured supply voltage, simultaneous loads and starting demand. Share the machine nameplate with KEVOR for a configuration review.
What affects the 20 KVA Servo stabilizer price?
Phase, input correction range, output requirement, cooling and protections affect the price. Ask for a configuration-specific quotation showing GST, freight, installation and warranty scope.
Is door delivery available?
Yes. KEVOR offers Pan-India door delivery. The quotation confirms freight, dispatch timing and unloading arrangements for your location.
What will be confirmed before I order?
The written quotation should confirm capacity, phase, input-voltage range, nominal output, cooling, protection options, price, freight, installation scope and order-specific warranty. Product dimensions and any performance figures should come from the selected configuration.
Your requirement, first
Let’s review your 20 KVA requirement.
Send your machine details on WhatsApp, or leave your number. We’ll help you take the next step.
Send a nameplatePrefer to talk? +91 76696 69400Talk to KEVOR
Let’s find the right fit.
Just your name and number to get started.