Electronics > Beginners
Question: Isolation transformer, Ground floating or Ground shorted to Neutral
Gtx21:
For an Isolation transformer, I have disconnected the (edit) isolation side ground pin from the earth-ground.
Now that the ground pin on the isolation side isn't connected to anything, should I leave it floating or should I short it Isolation-side-Neutral?
Edit: The reason I ask this is because I have seen other transformers a transformer that has all 3, isolation-side neutral, earth-ground, isolation-side ground pin, shorted together.
Edit: I'll try and be more clear.
--- Code: --- | +-------------------------+
| | | +-----+
Wall |===>| Isolation Transformer | ----->| DUT |
| | | ^ +-----+
| +-------------------------+ |
+--+
|
Previously, Earth ground from the wall |
went to the DUT with the scondary winding |
output here: ------------------------------+
It is this connection that I severed.
--- End code ---
Monkeh:
You should reconnect it properly.
ArthurDent:
It appears that you haven't got the concept of what the purpose of an isolation transformer is. There is no 'isolated ground' rather the one ground from the U shaped ground pin on the 3-wire input cord is connected to the transformer core and also to the U shaped pin on the 3-wire outlet connector on any isolation transformer that is designed to meet code. Only the secondary winding is isolated from ground.
Gtx21:
--- Quote from: Monkeh on September 02, 2018, 04:28:01 am ---You should reconnect it properly.
--- End quote ---
I don't want the ground pin on the isolation side connected to earth ground.
IanB:
--- Quote from: Gtx21 on September 02, 2018, 10:02:09 pm ---I don't want the ground pin on the isolation side connected to earth ground.
--- End quote ---
Then you don't want to be safe. Why don't you want to be safe?
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