45 kva Isolation Transformer

Primary Voltage: 480V

Secondary Voltage: 480Y/277V

Rated Capacity: 45kVA, customizable

Connection Group: Dyn11 (Delta primary, Wye secondary with neutral); other wiring configurations available

Transformer Type: Isolation Transformer

Standards: ANSI/IEEE, CSA/CAN, U.S. DOE Energy Efficiency Standards

Certifications: UL, cUL, CSA, SGS, CE

Product Advantages of Isolation Transformer

Differences Between Isolation Transformers and Ordinary Transformers

Ordinary Transformer

The winding layout is compact and the structure is simple.
Parasitic capacitance exists between windings.
High-frequency interference may be coupled to the secondary side through capacitance.

Isolation Transformer

Adopts a primary and secondary winding partition structure or shielded winding structure.
It can effectively reduce the parasitic capacitance between windings.
Adopts a multiple insulation structure, providing higher safety.

Application Scenarios of Isolation Transformers

Differences in Application Scenarios Between Isolation Transformers and Ordinary Transformers

Ordinary Transformer

Residential distribution systems and industrial plant power supply networks
Power conversion modules inside household appliances

Isolation Transformer

Power supply systems for medical diagnostic equipment, such as CT machines and monitors
Electrical equipment in high-humidity environments, such as bathrooms and swimming pools
Dedicated safety power supply for electronic equipment maintenance

45 KVA Isolation Transformer Technical Parameters

Parameter Item	Recommended Value
Product Type	Three-Phase Dry-Type Isolation Transformer
Rated Capacity	45 kVA
Input Voltage	480V AC
Output Voltage	480V AC
Voltage Ratio	1:1
Phase	Three Phase
Rated Frequency	50 / 60 Hz
Primary Rated Current	Approx. 54.1A
Secondary Rated Current	Approx. 54.1A
Winding Structure	Independent primary and secondary windings with galvanic isolation
Recommended Connection	Dd0; Dyn11 or Yyn0 available on request
Neutral Line	Optional; X0 can be brought out when star output is used
Input Voltage Tap	±2×2.5%: 456V / 468V / 480V / 492V / 504V
Impedance Voltage	Approx. 4%, designable from 4%–6%
No-load Current	≤3%
Voltage Regulation Rate	≤3%–5%
Efficiency	≥97% recommended
Winding Material	Copper winding preferred; aluminum winding optional
Insulation Class	Class H
Temperature Rise Limit	115K or 125K
Cooling Method	AN, Natural Air Cooling
Duty Cycle	Continuous duty
Electrostatic Shield	Electrostatic shielding layer between primary and secondary windings
Insulation Resistance	≥100MΩ between windings and winding-to-ground
Power Frequency Withstand Voltage	Primary to secondary and ground: 3kV/1min; subject to certification standards
Protection Rating	Indoor IP23/NEMA 1; Outdoor IP54/NEMA 3R
Ambient Temperature	Standard -20°C to +40°C; Middle East version designable up to +50°C
Altitude	≤1000m; derating or special design required above 1000m
Grounding	Enclosure protective grounding; electrostatic shield separately grounded
Applicable Standards	IEC 60076-1, IEC 60076-11, IEC 61558; UL 1561, CSA C22.2 No.47 optional

45 kva Isolation Transformer

Product Advantages of Isolation Transformer

Differences Between Isolation Transformers and Ordinary Transformers

Application Scenarios of Isolation Transformers

Differences in Application Scenarios Between Isolation Transformers and Ordinary Transformers

45 KVA Isolation Transformer Technical Parameters

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