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Voltage Regulation & Power Conditioning

EMi3 Servomotor Voltage Stabiliser

5kVA - 5MVA

Continuous Voltage Regulation for Critical Loads

✓ Power Quality Assessment & System Design

✓ Integration with UPS, Generators & Switchgear

✓ Australia-Wide Install, Service & Support

The Salicru EMi3 Servo Motor Voltage Stabiliser Series delivers precise, continuous voltage stabilisation for sites exposed to fluctuating supply conditions, overvoltage, undervoltage, and load variability. Designed for continuous-duty operation, EMi3 protects sensitive and reactive loads by maintaining stable output voltage in demanding industrial and infrastructure environments.

Salicru EMi3 Servo Motor Voltage Stabiliser Series (5 kVA – 5 MVA)

Reliable voltage regulation for environments where power stability is critical.

The EMi3 Servomotor Voltage Stabiliser is designed to protect sensitive and reactive equipment from overvoltage, undervoltage, and ongoing voltage fluctuations. It continuously corrects incoming supply variation to maintain a stable output voltage, reducing electrical stress and helping improve overall system efficiency.

Available in single- and three-phase configurations from 5 kVA to 5 MVA, EMi3 is ideal for industrial, utilities, telecom, control systems, and critical infrastructure applications.

Why Choose the EMi3 Voltage Stabiliser?

Constant voltage variations in electrical networks

Electrical networks are subject to continuous voltage variations caused by fluctuating loads connected to the mains, interference generated by connected equipment, voltage drops due to long distribution lines, and external disturbances.

These conditions make it difficult to maintain a stable electricity supply and can result in inefficiency, malfunction, and premature failure of sensitive electrical equipment.

Energy savings through overvoltage control

In conditions where total load consumption decreases, supply voltage often rises. This can lead to overconsumption and unnecessary electrical stress on connected equipment.

By stabilising the output voltage, EMi3 prevents overvoltage conditions, reducing energy waste and delivering significant cost savings while ensuring equipment operates within its intended voltage limits.

Effective protection for critical and reactive loads

The EMi3 series is particularly suited to applications with highly reactive and sensitive loads, where voltage instability can cause malfunction or damage.

Key Advantages

✔ Continuous voltage stabilisation
✔ Protection against overvoltage and undervoltage

✔ Reduced electrical stress on loads
✔ Improved energy efficiency

✔ Extended equipment lifespan
✔ Suitable for highly reactive and sensitive loads

How the EMi3 Voltage Stabiliser Works

The EMi3 operates through a servo-controlled regulation system using a variable autotransformer. A control circuit continuously monitors the output voltage and adjusts the transformer in series, either in phase or in opposition, to achieve and maintain the rated output voltage.

This regulation method provides smooth, accurate voltage correction without introducing harmonic distortion into the supply network.

Performance Overview

True RMS regulation
Servo Logic Control (SLC)
Independent phase regulation
High output voltage accuracy
Fast dynamic regulation response
High operating efficiency

Key Performance Capabilities

✔ Output voltage accuracy better than ±1% (adjustable)
✔ High-speed voltage correction up to 70 V/s

✔ System efficiency up to 97.5%
✔ Independent phase regulation for three-phase systems

✔ True RMS regulation, unaffected by line harmonics
✔ Stable operation under continuous load and voltage variation

Engineered for Continuous Voltage Stability

The EMi3 series combines servo-controlled regulation, true RMS measurement, and independent phase control to deliver precise voltage stabilisation across highly variable electrical networks.

Designed for continuous-duty operation, EMi3 maintains output stability even in the presence of load imbalance, harmonics, and rapid voltage fluctuations.

Technical Performance Specifications

Electrical Performance

Single-phase and three-phase configurations available, up to 5000 kVA
Output voltage accuracy better than ±1%, adjustable
Input voltage regulation range ±15% as standard
High-speed voltage regulation up to 70 V/s
System efficiency up to 97.5%
No harmonic injection into the supply network
Suitable for regenerative and reactive loads

Control & Regulation

Servo-controlled toroidal or column-type autotransformers
Guaranteed output stability via MOSFET servo control
Regulation based on true RMS measurement, unaffected by line harmonics
Independent phase regulation in three-phase systems
Stable operation during load and/or voltage variations

Mechanical & Environmental

Wide operating temperature range from –10°C to +55°C
Dry contact interface (2 standard, up to 11 optional)
Mechanically optimised design for reliability and ease of maintenance
High reliability design with high MTBF
Quiet operation for sensitive environments
Integrated overvoltage surge suppression protection
Transient overload capability up to 1000% of rated load (short duration)

Internal Design & System Architecture

The EMi3 Servomotor Voltage Stabiliser is engineered for continuous-duty operation in demanding industrial environments. Its internal design prioritises reliability, serviceability, and stable performance under variable load and supply conditions.

The construction combines robust power components with precise electronic control to ensure long-term operational stability.

Key Elements

Display
1. LCD 2x16 characters.
2. Navigation keys.
3. LEDs (alarm, bypass, normal operation and communications)

Communications
1. Slot for remote management or RS-232 interface.
2. RS-485 serial ports. MODBUS communications protocol.
3. Programmable dry contact interface (x9).
4. Digital input.

Connections
1. Display LCD
2. Variable autotransformer
3. Control PCB
4. Input protection
5. Input and output terminals
6. Surge protection
7. Motor supply transformer
8. Booster transformer

Applications & Use Cases

The EMi3 Servomotor Voltage Stabiliser is designed for environments where voltage instability can compromise performance, reliability, or equipment lifespan. Its ability to continuously regulate voltage makes it suitable for a wide range of industrial, infrastructure, and critical power applications.

EMi3 is particularly effective in applications with highly reactive or sensitive loads, where voltage fluctuations can lead to malfunction, inefficiency, or premature equipment failure.

Typical applications include:

Industrial & Manufacturing

Production lines and automated processes
Machine tools, milling machines, presses and lathes
Electrical discharge machining (EDM)
Polishing and trimming machines

Utilities & Infrastructure

Electrical substations
Utility distribution networks
Industrial power systems with long cable runs

Telecommunications

Telecom sites and repeater stations
Network infrastructure exposed to fluctuating supply conditions

Control & Critical Systems

Control systems and PLC environments
Sensitive electronic and measurement equipment
Medical and precision equipment

Brochure Download

For detailed technical specifications, configuration options, and full performance data, please refer to the official Salicru EMi3 product documentation.

Need help selecting the right configuration or understanding site requirements? Our engineers can assist with system design and sizing.

Salicru EMi3 Servomotor Voltage Stabiliser Brochure (PDF)

Request a Quote or Technical Consultation

Looking to address voltage instability, overvoltage, or sensitive load protection? UPS Solutions provides engineered voltage stabilisation solutions for industrial and critical power applications across Australia.

We partner with leading manufacturers like Salicru and support you from assessment through to installation and long-term service.

Why Work with UPS Solutions

► End-to-End Solutions

Assessment, system design, installation, and commissioning — including integration with UPS systems, generators, and switchgear.

► Trusted Expertise

Experience supporting industrial facilities, utilities, telecommunications, control systems, and critical infrastructure.

► Australia-Wide Support

Local installation, service, and technical support to ensure long-term reliability.

Enquire About the EMi3 Voltage Stabiliser

Contact UPS Solutions

For UPS systems there is design and engineering that will need to be done so it is best to book a site inspection or enquire directly with our team by filling out the form, emailing sales@upss.com.au or calling 1300 555 992.