Commonly considered for suitable indoor applications where ventilation, ambient conditions, acoustic expectations and installation clearance support a dry-type design.
Electrical Separation Defined by Load and Noise Environment
Isolation Transformers Selected for the Connected Equipment
Synergeze coordinates kVA, primary and secondary voltage, neutral, vector group, shielding, harmonic duty, cooling and enclosure around the actual sensitive or nonlinear load.
ELECTRICAL ISOLATION
Separate • Shield • Transform
Galvanic Isolation
Separate primary and secondary windings
Custom Voltage Ratio
1:1, step-down or step-up as specified
Shielding Options
Electrostatic or multi-shield design where required
Harmonic-Duty Options
K-rated construction for nonlinear loads where specified
How Electrical Isolation Works
Magnetic Energy Transfer Without a Direct Electrical Connection
An isolation transformer transfers AC power magnetically from a primary winding to a separate secondary winding. The galvanic separation removes a direct conductive connection between the circuits and can help interrupt ground-loop paths when the secondary neutral and earthing arrangement is correctly designed.
The ratio may be 1:1 or selected for step-down or step-up duty. For sensitive equipment, electrostatic or multiple shielding may be specified to reduce capacitive coupling and common-mode interference. Capacity, inrush, harmonics, vector group, insulation, cooling, enclosure and protection must be finalized for the actual load.
Isolation is not voltage regulation
A standard isolation transformer does not automatically correct incoming voltage variation. Voltage stabilization, surge protection, harmonic mitigation, bypass and monitoring require separate or combined equipment only when included in the approved design.
Types of Isolation Transformers
Select Phase, Cooling, Ratio and Shielding for the Application
The configurations below are selection paths rather than universal rating limits. Final design depends on the electrical duty, connected equipment, site conditions and approved specification.
01
Three-Phase Air-Cooled Isolation Transformer
Dry-type three-phase isolation transformer for suitable indoor industrial loads, with primary and secondary voltages, vector group, shielding, winding material and enclosure finalized against the approved requirement.
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02
Three-Phase Oil-Cooled Isolation Transformer
Oil-cooled isolation transformer configuration for selected ratings or demanding duty, subject to tank construction, heat dissipation, installation, oil maintenance and approved project scope.
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03
Single-Phase Isolation Transformer
Single-phase isolation transformer for suitable electrical and electronic loads, with 1:1, step-down or step-up ratio, shielding, terminals and protection selected for the application.
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3-Phase Air Cooled
Air-Cooled Configuration
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Three-Phase Air-Cooled Isolation Transformer
Dry-type three-phase isolation transformer for suitable indoor industrial loads, with primary and secondary voltages, vector group, shielding, winding material and enclosure finalized against the approved requirement.
Selected for suitable three-phase indoor applications
Natural or forced-air cooling depending on rating and design
Balanced or unbalanced system configuration where specified
Primary and secondary voltages, vector group and shielding selected per project
Protection, metering, enclosure and termination as agreed
Ventilation, ambient temperature and installation clearance must be reviewed
3-Phase Oil Cooled
Oil-Cooled Configuration
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Three-Phase Oil-Cooled Isolation Transformer
Oil-cooled isolation transformer configuration for selected ratings or demanding duty, subject to tank construction, heat dissipation, installation, oil maintenance and approved project scope.
Considered for selected higher-capacity or demanding duty applications
Oil tank, heat dissipation and enclosure selected around the rating
Indoor or outdoor construction only when specified and documented
Voltage ratio, vector group and winding arrangement finalized from the project requirement
Oil condition, leakage observation and maintenance access considered
Protection, metering, enclosure and cable interface as agreed
Single Phase
Single-Phase Configuration
Discuss this configuration →
Single-Phase Isolation Transformer
Single-phase isolation transformer for suitable electrical and electronic loads, with 1:1, step-down or step-up ratio, shielding, terminals and protection selected for the application.
Selected for suitable single-phase electrical or electronic loads
Primary and secondary voltages confirmed for the application
Capacity selected from continuous load and starting or inrush requirement
Socket, connector or terminal arrangement depends on rating and design
Primary and secondary protection included only as specified
Indoor enclosure, ventilation and operating environment must be reviewed
Cooling Selection
Air-Cooled Dry-Type Configuration
Oil-Cooled Configuration
Air-Cooled and Oil-Cooled Isolation Transformer Comparison
Cooling is selected from rating, losses, duty, ambient temperature, ventilation, enclosure, indoor or outdoor placement, footprint, maintenance and project requirements.
Considered for selected ratings or demanding duty where tank design, heat dissipation, oil handling, installation and maintenance requirements are acceptable.
Cooling selection note
Cooling type must not be selected from kVA alone. The final arrangement depends on the complete electrical, thermal and environmental duty.
Advanced Isolation Options
Ultra-Isolation and K-Rated Transformer Configurations
Sensitive electronic loads and nonlinear loads can require more than basic galvanic separation. Enhanced shielding and harmonic-duty construction are separate engineering selections and are not standard features of every isolation transformer.
Ultra-Isolation / Multiple-Shield Configuration
Electrostatic or multiple shields between primary and secondary can reduce capacitive coupling and help limit the transfer of common-mode electrical noise. The shield arrangement, earthing point and measurable attenuation must be defined in the approved design.
- Separate primary and secondary windings provide galvanic isolation
- Multiple shielding may be selected for sensitive electronic equipment
- Secondary neutral and shield earthing require coordinated system design
- Coupling capacitance and attenuation values require manufacturer confirmation
K-Rated Transformer for Nonlinear Loads
A K-rated transformer is selected for loads that draw harmonic current and create additional winding and neutral heating. The K-factor must be chosen from the load spectrum and thermal duty rather than treated as a general performance grade.
- Applicable to selected nonlinear and electronic loads
- K4, K7, K13 or K20 only where supported by the selected make
- Harmonic spectrum, neutral current and thermal loading must be reviewed
- K-rating does not replace a harmonic study or filtering requirement
Engineering qualification
Ultra-isolation, K-rating, zig-zag or special vector arrangements, shielding performance and harmonic capability are supplied only when specifically engineered, documented and included in the accepted technical offer.
Project-Specific Technical Selection
Isolation Transformer Design and Selection Parameters
The reference documents organize selection around phase, voltage ratio, cooling, shielding, harmonic duty, protection and standards. Final values must still be confirmed against the connected load, approved SLD, site conditions and selected make.
Phase & connection
Single phase or three phase; delta, star or other vector arrangement only as approved
Rated capacity
Selected from continuous load, power factor, inrush, harmonic current, duty and design margin
Primary / secondary voltage
1:1, step-down or step-up ratio selected for the approved supply and load
Construction & cooling
Dry-type air cooled, forced-air or oil cooled as supported by the rating and installation
Core, winding & insulation
Core material, copper or aluminium winding, insulation class and temperature rise as offered
Shielding & isolation
Galvanic isolation with electrostatic or multiple shields where the application requires lower capacitive coupling
Harmonic duty / K-factor
Standard or K-rated design; K4, K7, K13 or K20 only where supported and selected from load data
Protection & indications
MCB or MCCB, surge protection, temperature monitoring, voltage indication and status lamps only as included
Terminations & enclosure
Terminal plate, busbar or cable termination and indoor or outdoor enclosure as specified
Standards, tests & earthing
Applicable standard, routine tests, dielectric checks, neutral bonding and protective earthing as approved
Technical qualification
Capacity range, efficiency, regulation, impedance, coupling capacitance, common-mode attenuation, insulation resistance, leakage current, dielectric strength, temperature rise, IP rating and short-circuit withstand vary by design and must be confirmed in the selected manufacturer datasheet.
Protection, Metering & Controls
Protection and Monitoring Selected Around the Transformer Duty
Protection devices, metering, alarms, switching and communication vary by rating and scope. Only items confirmed in the approved offer should be treated as included.
Protections
✓Primary-side short-circuit and overload protection as specified
✓Secondary-side protection selected against rated current and cable duty
✓Winding temperature monitoring for applicable ratings where included
✓High-temperature alarm or trip where included
✓Phase-failure or phase-sequence monitoring where required
✓Surge protective device only when included in the approved scope
✓Bypass or changeover arrangement only when specifically engineered
✓Door interlock, emergency stop or remote trip where specified
Metering & Indications
✓Primary voltage indication
✓Secondary voltage indication
✓Primary and secondary current indication where included
✓Phase-to-phase and phase-to-neutral readings as applicable
✓Frequency indication where included
✓Transformer ON, trip and alarm status indications
✓Temperature indication for selected designs
✓Digital multifunction meter or communication only when specified
Controls
✓Main input and output switching arrangement as specified
✓Local start, stop and reset where a control panel is included
✓Alarm acknowledgement and trip reset where applicable
✓Cooling fan control for forced-air designs where included
✓Temperature controller settings for applicable ratings
✓Remote potential-free contacts where specified
✓Communication interface only when included
✓Maintenance bypass or interlocking only as approved
Define More Than the kVA
Voltage Ratio, Inrush, Harmonics and Shielding Drive the Design
Connected load is only the starting point. Starting current, crest factor, nonlinear current, neutral requirement, leakage-noise sensitivity and ambient conditions influence transformer sizing and construction.
01
Connected load in kW or kVA and required design margin
02
Primary supply voltage, tolerance and frequency
03
Required secondary voltage and neutral arrangement
04
Single-phase or three-phase connection and vector-group requirement
05
Load type, power factor, starting current and inrush profile
06
Harmonic or nonlinear load details and waveform sensitivity
07
Required electrostatic or multi-shield arrangement
08
Indoor or outdoor location, ambient, ventilation and available footprint
09
Cable entry, terminal size, enclosure and IP requirement
10
Protection, metering, bypass, communication and commissioning scope
Engineering & Support Scope
From Load Review to Supply and Commissioning Support
The final Synergeze scope is governed by the accepted quotation, purchase order, selected make, approved drawing, site readiness and mutually agreed installation or service responsibility.
Requirement review and transformer sizing assistance
Primary and secondary voltage-ratio selection
Air-cooled or oil-cooled configuration review
Shielding, vector group, neutral and earthing coordination
Protection, metering, enclosure and termination scope coordination
Supply against approved technical and commercial offer
Installation and commissioning assistance where included
Inspection, testing, troubleshooting and service support against agreed scope
Industrial Applications
Electrical Isolation for Industrial and Sensitive Loads
Suitability depends on the load, electrical system, voltage ratio, shielding requirement, earthing arrangement and selected transformer design.
CNC & Machine Tools
Laser Cutting Machines
Textile & Garment Machinery
Food Processing & Packaging
Printing Machinery
Granite Cutting & Polishing
Medical & Analytical Equipment
Data Centres & UPS Bypass
Telecommunication Equipment
Testing & Measurement
Industrial Electronics
Begin with the Load and Voltage Interface
Share Equipment Load, Supply and Required Isolated Output
Add starting current, harmonic or K-factor information, neutral/vector requirement, shielding expectation, duty, ambient, enclosure and installation constraints.
Primary Supply
Primary voltage, frequency and available tolerance
Load & kVA
Connected load, power factor, starting current and duty
Secondary & Cooling
Secondary voltage, phase, shielding and cooling preference
Quick Technical Enquiry
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