The purpose of an isolation transformer is to isolate the hot and neutral from the safety ground, not to isolate the safety ground. That should be left intact because it can help protect you if there's a short in the isolation transformer.
OK, the isolation transformer should be used to isolate the scope from the mains, and the scope safety ground needs to be disconnected, when probing a non-isolated mains powered circuit. Otherwise there is the likely-hood of damaging the scope. By properly isolating the scope the waveform distortion is removed.
As the secondary of an isolation transformer is floating you could touch either wire BUT NOT BOTH without getting a shock. The main situation where it is useful is working on the primary side of switch mode power supplies (Or very old live chassis TV sets.). The first thing (After filtering) on the input of a switch mode power supply is a rectifier (Either a bridge or voltage doubler.) which ...
Hello! I'm building "isolation transformer+variac+dim bulb tester combo" according to plans in attached pictures (from "Mr Carlson's Lab" YT channel - It's gonna be enclosed in chassis version since I wouldn't feel comfortable with such stuff exposed ;) ) I have quite nice ~230v 6.3A variac...
Looks good to me. What I use for isolation (mostly) has 120/220 switches so I can test a power supply at 120 or 220 with a switch flip. Most people just need a 1:1 transformer. (isolation only) I spend much time looking at the hot side of power supplies and really want the isolation.
The power specialist recommended Isolation transformer for the job. We've just brought it, while wiring what actually he done is to connect input RST & Earth (separate) on the primary side and take output from secondary side. What kind of equipment is this and is the RST 3ph? and from what kind of secondary? RST and star neutral?
I want to use isolation transformer for isolating the osyloscope from the grid circuitry my questions are if i add a rcd relay to the output of isolation transformer how should i wire the earth and does wiring the earth effects the isolation from the grid ?
An isolation transformer would allow an ac powered meter or scope to reference the negative lead to a high potential, without shorting the equipment thru the common ground.
The isolation transformer removes only the Ground element of the hazard. But if the any ground-like reference is removed, what kind of reference is left for the positive voltage on the coil? I.e., what is now the + and what is the -? I.e., if I wanted to measure that voltage, what would I connect a "voltmeter" to?
I have read about the use of an isolation transformer to seperate a device eg: oscilloscope from a power source. The gist I get is that it is primarily to protect the device from inadvertent grounding of probes and burning out the transistors and other parts in the scope by preventing the...
