Servo Voltage Stabilizer in Lucknow UP

Servo Voltage Stabilizer is an electromechanical device designed to maintain a constant output voltage level despite fluctuations in the input voltage from the power supply. It’s commonly used to protect sensitive electrical equipment like computers, medical instruments, industrial machines, and household appliances from voltage instability.

How It Works:

Unlike static stabilizers, a servo stabilizer uses a servo motor to control a variable transformer (variac), which in turn adjusts the voltage supplied to the load. The system continuously monitors the input voltage and, if it detects a deviation from the set range, the servo motor adjusts the position of the variac to correct the output voltage.

Main Components:

1. Servo Motor: Adjusts the variac to regulate output voltage.
   
2. Buck-Boost Transformer: Helps step-up or step-down the voltage as needed.
   
3. Variac (Variable Autotransformer): Regulates voltage via tap changes.
   
4. Control Circuit/MCU: Monitors input and output voltage, sends signals to the servo motor.
   
5. Relay or Contactor: Switches to disconnect load if the voltage is out of permissible limits.
   
6. Display Unit: Shows voltage levels and operating status.
   

Advantages:

• High accuracy (±1% voltage regulation)
  
• Smooth voltage correction (no sudden steps)
  
• Suitable for both single-phase and three-phase systems
  
• Can handle high loads (used in industrial applications)
  

Limitations:

• Slightly slower response time compared to electronic stabilizers
  
• More moving parts → higher maintenance
  
• Heavier and more expensive than static stabilizers
  

Typical Applications:

• CNC machines
  
• Medical equipment (MRI, X-ray machines)
  
• Printing presses
  
• Laboratories
  
• Residential buildings with voltage fluctuation issues

Popular Servo Voltage Stabilizer Brands & Models

Top Indian Brands & Models

Brand	Popular Models / Series	Key Features
V-Guard	VND 400, VGSD 50, VGMW Series	Trusted for home appliances; digital display
Servokon	SK Series, Oil-Cooled & Air-Cooled Variants	Industrial-grade; durable and efficient
Uniline	i-Stab Series, UCS Series	Microcontroller-based, fast correction speed
Everest	EVS Series, ESV-50, 3-phase stabilizers	Wide range; ideal for both home & industry
Purevolt	PSV Series (1 KVA–1000 KVA), Digital Servo Models	Customizable voltage range, IP-rated enclosures
Voltas	VT Series (Residential models)	Mostly for home & light commercial use
Bluebird	BBV Series, BB-500, BB-Digital	Reliable home solutions, compact size
Aulten	AVS Series, Heavy Duty 5 kVA-20 kVA	Digital display, affordable, overload protection
Usha Servo	UST Series (Air/Oil cooled), ServoSmart Stabilizers	Energy efficient, robust servo motor system
Maini	MS Series	Good for lab and sensitive industrial equipment

International Brands

Brand	Country	Specialty
Riello Elettronica	Italy	Online UPS + Servo stabilizers (digital control)
Statron	Switzerland	Precision stabilizers for medical & lab use
APC (by Schneider)	USA/France	Known more for UPS; has smart stabilizing units
Staco Energy	USA	High-capacity servo stabilizers for industry

Buying Tips:

• • Check Input Voltage Range: Ensure it matches your area’s voltage fluctuation range.
    
  • KVA Rating: Choose based on total connected load.
    
  • Phase Type: Single-phase for home; three-phase for industries.
    
  • Cooling Type: Air-cooled for light duty, oil-cooled for heavy industrial loads.
    

• Features: Look for digital display, auto cut-off, overload protection, and surge suppression. 

Popular Indian Servo Voltage Stabilizer Models/Examples

Residential/Office Use (Single Phase Models)

Brand	Model Name	Capacity	Input Voltage Range	Features
V-Guard	VSD 1000	1 kVA	90V – 300V	Digital display, wall mount, thermal cutoff
Everest	EW 500-D	5 kVA	90V – 300V	Digital display, copper winding
Servokon	SKN-3KVA-140V	3 kVA	140V – 270V	Microcontroller-based, compact design
Bluebird	BB-3kVA-Digital	3 kVA	90V – 280V	LED display, overload protection
Luminous	LVSP-5KVA	5 kVA	140V – 280V	Smart time delay, thermal protection

 

Industrial Use (Three-Phase Models)

Brand	Model Name	Capacity	Input Voltage Range	Applications
Servokon	SKN-50KVA-3P	50 kVA	300V – 470V	CNC machines, medical, elevators
Everest	ESVS-100KVA-3P	100 kVA	340V – 470V	Large industrial load
Purevolt	PVS-30KVA-3P	30 kVA	340V – 470V	Laboratories, production units
Uniline	USVS-75KVA-3P	75 kVA	300V – 470V	Printing presses, hospitals
Logicstat	LTVS-60KVA	60 kVA	320V – 470V	Telecom, industrial automation

Special Models (Oil-Cooled for High Capacity)

Brand	Model	Cooling Type	Typical Use
Servokon	SKN-200KVA Oil Cooled	Oil-Cooled	Heavy industry, factories
Purevolt	PVS-500KVA Oil Cooled	Oil-Cooled	Manufacturing plants, foundries

Why These Brands Are Popular:

• Made in India with support for Indian voltage conditions
  
• Customization available for specific voltage requirements
  
• After-sales service is widespread
  
• Trusted in government, telecom, healthcare, and private sectors

Best Servo Voltage Stabilizer Company in Lucknow UP

Lucknow UP hosts several reputable manufacturers and suppliers of servo voltage stabilizers, catering to diverse needs from residential to heavy industrial applications. Based on available information, here are some prominent companies in the region:

Leading Servo Voltage Stabilizer Manufacturers in Lucknow UP

1. Indian Servo Controls

• • Overview: A well-established manufacturer specializing in industrial-grade servo voltage stabilizers ranging from 30 kVA to 5000 kVA.
    
  • Key Features: Rolling contact-type stabilizers, advanced automatic voltage controllers, and robust designs suitable for heavy-duty applications.
    
  • Applications: Ideal for sectors like manufacturing, textiles, and engineering.
  • Website: indianservocontrols

2. Shakti Servo

• • Overview: Offers a comprehensive range of high-performance servo voltage stabilizers tailored for industrial and commercial sectors.
    
  • Key Features: Advanced technologies like ADMS & EDL for real-time voltage correction, overload protection, and energy efficiency.
    
  • Applications: Suitable for CNC machines, textile units, oil & gas, and engineering sectors.
  • Website: shaktiservo.comshaktiservo.com

3. Hindustan Power Control System

• • Overview: A prominent manufacturer and supplier offering a range of power solutions, including servo voltage stabilizers.
    
  • Key Features: Focus on energy savings, improved power factor, and consistent voltage output.
    
  • Applications: Suitable for various industrial applications across multiple states.
  • Website: hindustanpower.comJindals+2GNT Transformers+2hindustanpower.com+2

4. Guru Nanak Transformers

• Overview: Specializes in manufacturing servo voltage stabilizers with capacities ranging from 5 kVA to 5000 kVA.
  
• Key Features: Emphasis on energy savings up to 25%, reduction in equipment breakdowns, and improved power factor.
  
• Applications: Ideal for industries requiring stable voltage for optimal equipment performance.
  
• Website: gnttransformers.com

FAQs: Servo Voltage Stabilizer

Q1. What is a Servo Voltage Stabilizer?

A Servo Voltage Stabilizer is an automatic voltage regulator that uses a servo motor-controlled mechanism to maintain constant voltage output, protecting equipment from voltage fluctuations.

Q2. How does a Servo Voltage Stabilizer work?

It detects voltage fluctuations in the input supply and adjusts a variac (variable transformer) using a servo motor to stabilize the output voltage in real time.

Q3. What are the key components?

• • Servo Motor
    
  • Variac (Autotransformer)
    
  • Buck-Boost Transformer
    
  • Control Circuit (usually microcontroller-based)
  • Sensors and relays

Applications & Use Cases

Q4. Where is it used?

• • Industries (textile, CNC, plastic molding, etc.)
    
  • Medical equipment (MRI, X-ray)
    
  • Commercial buildings
    
  • Homes with frequent voltage fluctuation

Q5. Can it be used for both single-phase and three-phase supply?

Yes. Servo stabilizers are available in both single-phase (for homes and small offices) and three-phase (for industries and heavy loads).

Selection & Specification

Q6. How do I select the correct capacity?

Identify your total connected load in kVA and choose a stabilizer with 10–20% extra capacity for future expansion and buffer.

Q7. What is the typical input voltage range?

Ranges vary:

• Residential: 90V–300V
  

• Industrial: 300V–470V (three-phase)
  

Q8. What is the output voltage accuracy?

Most servo stabilizers maintain an output within ±1% of the nominal voltage (e.g., 230V or 415V).

Benefits & Reliability

Q9. What are the advantages?

• • Precise voltage control (±1%)
    
  • Protection from voltage surges, sags, and spikes
    
  • Increases the lifespan of connected equipment
    
  • Reduces power losses and maintenance costs
    

Q10. Are servo stabilizers better than static stabilizers?

Yes, for larger or variable loads, servo stabilizers offer better accuracy and long-term performance. Static stabilizers are quicker but suitable for lighter loads.

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