Custom Isolation Transformers designed to your specifications

Isolation transformers typically have electrical separation between the primary and secondary windings to provide isolation between either high-voltage and electrical circuits, or to ground. These units also provide isolation between load and source.

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Isolation Transformers

Quality Transformer and Electronics' is capable of designing and implementing an electrostatic shield, air, FS6 gas (sulferhexaflouride), oil, and epoxy-cast coils in order to meet our customers' desired isolation needs. Isolation provided by Quality Transformer and Electronics' transformers can help protect against shock, suppress noise to help protect equipment, and improve power quality. If your application requires a very high level of isolation and good overall power quality, refer to Quality Transformer and Electronics' line of Noise Cut Transformers (NCT), Isolation Transformers, and Power Conditioners. For Ultra High Isolation, please refer to our Power Conditioners and Noise Cut Transformers.

Technical Capabilities

Power Rating 50VA up to 1.5MVA
Isolation 15kVrms standard isolation
up to 150kVAC/300kVDC high voltage isolation
No. of Phases 1
Frequency 50/60Hz
400Hz up to 20kHz
Voltages 600V Standard
For higher voltages, visit our high voltage transformer page.
Common Taps (Vrms) 180 | 200 | 208 | 220 | 240 | 260 | 280
380 | 400 | 440 | 480 | 500 | 600
Other Options Enclosures (NEMA 1, 3, 3R, 4, 4X)
Circuit breakers
EMO switches
Ring-lug compatibility


2.5kVA Isolation Transformer

2.6 kVrms isolation custom transformer
2.6 kVA custom isolation transformer
Single phase isolation transformer

This 2.6kVA isolation transformer has 2.5kVrms isolation. This transformer is put into a power supply used for water purification purposes.

Power Rating 2.6kVA
No. of Phases 1
Frequency 50/60Hz
Isolation 2.5kVrms
Primary 240/208Vrms
Secondary 66.6Vrms @ 40Arms
More Examples

45kVA Custom Isolation Transformer Assembly

Three-phase isolation transformer
45 kVA custom isolation transformer
4 kV isolation transformer

This 45kVA isolation transformer is used in the production of semiconductor manufacturing equipment. This custom transformer is outfitted with circuit breakers and a filter.

Power Rating 45kVA
No. of Phases 3
Frequency 50/60Hz
Isolation 4kVrms
Primary 200/208/240/380/400/416/440/480Vrms
Secondary 20/20/20/30/50/150Amp Circuit Breakers

1500 VA Isolation Transformer

Custom isolation transformer
Single phase custom isolation transformer
5 kVrms isolation transformer

This 1500 VA isolation transformer is used in electric car charging stations. It has 5,000 Vrms isolation.

Power Rating 1.5 kVA
No. of Phases 1
Frequency 47/63 Hz
Isolation 5 kVrms
Primary 277 Vrms Nom., 170-325 Vrms Range
Secondary 277 Vrms Nom., 170-325 Vrms Range