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DIY Safety Galvanic Isolation Transformer

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Creation's quality: 5.0/5 (2 votes)
Evaluation of members on the printability, utility, level of detail, etc.
  • 👁 1.3k views
  • 8 likes
  • 2 downloads

3D model description

https://youtu.be/wiTTOboKEB4

I designed the components to assemble a 300VA isolation transformer using a toroidal transformer, two circuit breakers, a socket and a digital panel meter for voltage and current. The isolation transformer is designed to be easily portable and is fitted with a handle.

The isolating transformer is used to isolate electrical circuits during oscilloscope measurement, repair, fault finding, but it is also a safety feature that protects human life and health from contact with live parts of electrical circuits.

You'll need:
100 mm DIN Rail
1 pc Circuit Breaker 2A/D, I used ABB 2CDS251001R0021
1 pc Circuit Breaker 2A/C, I used ABB 2CDS251001R0024
1 pc DIN Rail electric socket, I used ABB 2CSM110000R0711
1 pc Toroidal transformer 300VA up to diameter Ø: 120 mm, I used TALEMA 58-0300-230-S, 230VAC; 230V/230V; 1,3A; 2,5kg; Ø: 117mm
1 pc Universal electric case 135 x 170 x 176 mm, I used EPN 2714-00
1 pc Volt/Amper meter or Volt meter digital module from China
8 pcs Wood screws with round head 3.5 x 22
4 pcs Wood screws with round head 2.9 x 16

All the 3D printed models needed for assembly are available for download, including three drilling and cutting templates, for ease of production.


3D printing settings

Layer Height: 0.2
Line Width: 0.45
Top/Bottom Layers: 3
Walls: 3
Speed: 60mm/s
Support: Yes, Tree Support
Recomended: Use two colours of PLA or PETG filament

3D printer file information

  • 3D design format: STL Folder details Close
    • Cable Grommet.stl
    • Drilling Template 1.stl
    • Drilling Template 2.stl
    • Drilling Template 3.stl
    • Face Clip.stl
    • Face Strip.stl
    • Handle.stl
    • Measure Bracket.stl
    • Measure Clip.stl
    • Measure Nut.stl
    • Rail Mount.stl

    Learn more about the formats

  • Last update: 2021/10/31 at 19:31
  • Publication date: 2021/10/26 at 12:13

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