Electrical Appliances & Electrical Machines are made to work with optimum efficiency at rated voltage. They work at particular voltage range, it may be +-5% or +-10% of rated voltage. Voltage Out of the range leads to decrease in efficiency, decrease in useful life & malfunctioning in operation.
System must work at defined voltage range; failure of this leads to overcurrent, overheating, degraded useful life, insulation Damage, reduced performance. Voltage stability is most important in electrical system That’s why for a stable voltage, voltage stabilizer is must. In this post, We are going to discuss the technical specifications of 25KVA Servo control voltage stabilizer.
25KVA ASC Voltage Stabilizer Made by Fuji Electric
This 25KVA ASC (Automatic servo control voltage stabilizer) is having a size of 540*600*1075[L*B*H(mm)].
This stabilizer provides a stable 3phase 415V output voltage at an input voltage ranges from 360-460 V. Servo is equipped with HMI Which reflects input voltage, Output voltage, Input current, Output current & faults. Servo also contains a bypass switch.
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What is a servo voltage stabilizer ?
Servo voltage stabilizer utilizes the working principle of transformer to produce stable voltage. An input to the transformer is changed through variable variac with the help of servo motor. That’s why it is known as servo voltage stabilizer.
Technical specifications of voltage stabilizer
- Capacity= 25KVA
- Input Voltage range = 360-460 (V)
- Output Voltage = 415
- Input Frequency= 47-53Hz
- Max. Current= 35 Amps
- Control type= Digital microcontroller based
- Correction speed = 70V/Second
- Reset= Manual/Auto reset with time delay & programmable
- Response time = 10micro Sec
- Audio Alarm for tripping conditions
- Nature of cooling = Natural Air
- Effect of pf – Nil
- Waveform distortion – Nil
- Efficiency > 98%
- Cabinet color = Siemens Grey
- Servo motor drive = Rugged AC step synchronous motor
- Operating Temperature = 0-45°C
- Degree of protection = IP20
HMI (Human Machine Interface)
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HMI has two displays
- We press set button for 1st time, Input LED & red LED get on. This means display is showing the red phase voltage at Input side.
- When we press set button for 7 times, output & red-yellow LEDs get on. This means display showing the line to line voltage between red & yellow phase at output side.
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- STOP KEY:
- START KEY:
- MENU KEY:
- LOG KEY:(This key present inside the stabilizer on PCB board)
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PROTECTIONS
2. Electronic overload protection & short circuit protection through MCB.
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CONNECTION BOX
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Applications of 25kVA Servo Stabilizer
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CNC machines
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Hospitals
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Printing machines
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Industrial panels
Frequently Asked Questions (FAQs)
Q1. What is a 25kVA servo voltage stabilizer used for?
A 25kVA servo voltage stabilizer is used to maintain a constant output voltage (usually 415V) despite input voltage fluctuations. It protects industrial equipment such as CNC machines, motors, panels, and sensitive electrical loads from overvoltage and undervoltage conditions.
Q2. What is the input voltage range of a 25kVA servo stabilizer?
The typical input voltage range of a 25kVA three-phase servo stabilizer is 360V to 460V. It automatically corrects the voltage and maintains a stable output for safe equipment operation.
Q3. How does an automatic servo voltage stabilizer work?
An automatic servo stabilizer continuously monitors the input voltage using a control circuit or microcontroller. When voltage fluctuates, a servo motor adjusts the variac (auto transformer) to increase or decrease the output voltage and maintain a constant level.
Q4. What protections are available in a servo voltage stabilizer?
Most servo stabilizers provide multiple protections such as:
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Overvoltage protection
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Undervoltage protection
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Overload protection
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Phase failure protection
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Single phasing protection
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Short circuit protection
These features help prevent equipment damage.
Q5. What is the efficiency of a servo voltage stabilizer?
A servo voltage stabilizer typically operates with high efficiency of around 97% to 98%, resulting in low power loss and reliable long-term performance.
Q6. Where is a 25kVA servo stabilizer commonly used?
It is widely used in:
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Industrial machines
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Hospitals and medical equipment
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Printing and packaging units
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Textile machines
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Commercial buildings and offices
Q7. Why is voltage stabilization important for industrial equipment?
Voltage fluctuations can cause overheating, insulation failure, reduced efficiency, and unexpected machine breakdown. A servo stabilizer ensures stable voltage, improves equipment life, and reduces maintenance costs.
SUMMARY
Stable voltage across the system increases its useful life. It also makes the system highly efficient.
For voltage stabilization, Voltage stabilizer are presents. Both in Single phase as well as 3 phase. There are multiple types of stabilizers working on different principles. In this post, 25KVA(ASC) Automatic servo control voltage stabilizer is been discussed. This stabilizer is made by fuji electric.
If you want to know about the working of servo, You can go through our next post whose link is given below:
Working principle of Servo Voltage Stabilizer
how to auto start ? how to set mode and run mode ?
Just press the start button for auto start & make sure selector switch position in Auto side(SCVC).2. Run mode is default mode, Servo always remains in Run mode in normal working conditions. If you want to enter in set mode, You have to switch on the tactile switch present inside the cabinet of servo; ON top most side.
Thankyou So Mach…