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Home > Products > SBW-200KVA Three Phase Automatic Voltage Stabilizer for Heavy Industrial Power Protection

SBW-200KVA Three Phase Automatic Voltage Stabilizer for Heavy Industrial Power Protection

No.SBW-200KVA

The SBW-200KVA is a three-phase fully automatic compensated voltage stabilizer designed for high-power industrial and commercial applications.

It provides stable 380V output under input voltage fluctuations of ±15%, using servo motor regulation, compensation transformer technology and microprocessor control.

200KVA | 380V Input | 380V Output | ±15% Input Range | High-Capacity Industrial Design

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Description

Technical Specifications

Parameter	SBW-200KVA
Rated Capacity	200 KVA
Phase	3-Phase, 5-Wire
Input Voltage	AC 380V ±15%
Output Voltage	AC 380V
Voltage Accuracy	±1%–±5% Adjustable
Frequency	50/60 Hz
Efficiency	≥95%*
Response Time	<1 second*
Waveform	Pure Sine Wave
Insulation Class	Class F
Protection Degree	IP20
Cooling	Dry-Type Forced-Air Cooling
Design Life	20 Years*

Servo Compensation Control

Sample — the microprocessor board reads the incoming three-phase supply and compares it with the 380V reference the unit has been set to hold.
Calculate — the difference between actual and reference becomes the correction value the servo acts on.
Adjust — the servo motor turns the regulator through a chain drive and sliding carbon brush contact, changing the compensation voltage until the deviation is cancelled.
Hold — only the deviation passes through the compensation transformer, so the main current path stays close to direct and the output waveform is left intact.
Repeat — the loop runs continuously without operator input, which is what keeps a three-phase load steady while the grid moves around it.

Cabinet & Internal Build

Each unit is built as a floor-standing steel cabinet: a white matte powder-coated enclosure with a hinged front door and latch, sitting on casters so it can be rolled into position before the supply is landed. Ventilation louvres and internal fans move air across the windings, and that path has to stay clear once the unit is in place. The blue digital control panel on the front face carries the readout and the adjustment controls, so an operator can see what the unit is doing without opening the door. Inside, three vertical copper coil windings sit alongside the servo drive, a formed wiring loom and the compensation transformer. Assembly, wiring and testing all happen inside our own industrial power protection factory, which is why the terminal layout on the cabinet matches the drawing supplied with it.

Technical Support & Model Matching

Sizing power protection correctly matters more than picking the biggest unit. Our engineering team reviews your load profile, phase configuration and site conditions, then helps you match the right double-conversion UPS, voltage stabilizer or isolation transformer from our range. We assist with wiring and installation guidance, commissioning checks and fault troubleshooting, and stay reachable by email, phone or WhatsApp for questions after delivery. Installation notes, service conditions and maintenance guidance accompany each unit so your team can run it confidently.

Working Principle

The SBW series uses a combination of real-time voltage detection, compensation transformer, servo motor adjustment and microprocessor control.

When the input voltage fluctuates, the controller calculates the voltage deviation and automatically adjusts the compensation voltage to maintain a stable output.

The series compensation design regulates only the voltage deviation, helping achieve high efficiency and a pure sine-wave output.

Applications

CNC machining centers
Industrial production lines
Metal processing machinery
Medical equipment
Telecommunications equipment
Data centers
Semiconductor equipment
HVAC and chillers
Textile machinery
Industrial and commercial power systems

Quality Assurance

95% core materials self-produced or directly sourced
Full-process quality control
100% initial testing
48-hour continuous aging test
Batch re-inspection before shipment
Export-grade packaging
1-year warranty + lifetime maintenance support

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Looking for a 200KVA three-phase automatic voltage stabilizer?

Contact Feixiangda Power for technical specifications, customization and quotation.

Request a Quote →Phone/Whatsapp: +86 17786854129 Email: kate@feixiangdapower.com

FAQ

Q1. Will it run on a 60 Hz supply as well as 50 Hz?
Yes. The stabilizer is rated for 50/60 Hz operation, so a 380V/50 Hz plant and a 60 Hz site can both use it. Where the supply comes from a generator rather than the grid, voltage can move further than a utility line does — send us the measured high and low readings at enquiry stage so the input window is set up for your conditions.

Q2. Which loads can a 200kVA three phase automatic voltage stabilizer carry?
It carries a mixed industrial load — machine tools, process drives, pumps, instrumentation and control panels — as long as the total running current stays inside the rating. Add up the running current of everything downstream, then allow for motor starting surges and any planned expansion before you settle on a 200 kVA unit; send us the list and we will check the figures with you.

Q3. How much of the stabilizer is built in-house?
Around 95% of the core materials are self-produced or sourced directly, which keeps the winding, compensation transformer and control assembly consistent from one unit to the next. Because we are the voltage stabilizer manufacturer rather than an assembler of bought-in blocks, the same process and test routine applies when you reorder the same model for another line.

Q4. What maintenance does the unit need through the year?
The dry-type design means there is no oil to change. Keep the ventilation louvres and fans clear, inspect the brush contact and the drive assembly at scheduled shutdowns, and check the terminal connections for tightness. The cabinet opens from the front, and the copper coil assembly and wiring are laid out so a maintenance electrician can work on the unit in place.

Q5. Can it be installed on the shop floor next to the machines?
Yes, provided the position is indoors and dry. The cabinet is rated IP20 and cools by forced air, so it needs clear space around the ventilation louvres and a floor that can take a floor-standing unit on casters. Keep it out of washdown areas and heavy dust; for heavy industrial power protection duty in a warm production hall, place it where air can move freely around the enclosure.

Q6. How tight can the output voltage be held?
The output can be set anywhere between ±1% and ±5% of 380V. Tight settings suit instrumentation, analysers and control electronics that dislike drift; a slightly wider setting reduces the number of servo corrections and suits motor-heavy loads. The value is chosen before the unit ships, so tell us what your equipment needs when you order.

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If you have any queries, get in touch today! Don't hesitate. We try to take the extra step for our customer satisfaction.

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Feixiangda Power focuses on building long-term partnerships by delivering practical solutions and dependable services to the global market. Guided by principles of quality, integrity, and efficiency, we provide reliable support that helps businesses operate with confidence and achieve sustainable growth.

All Collections: Transformer; Voltage Stabilizer; AVR Intelligent Voltage-Frequency Integrated Stabilizer; UPS Uninterruptible Power Supply; Variable Frequency Power Supply; Voltage Regulator

Contact Us: Building 2, No. 49, Fenghuang 2nd Road, Humen Town, Dongguan City, Guangdong Province; kate@feixiangdapower.com; （+86）17786854129

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