ahmd hasanein
New member
what is the diffrence between ct and toroid
diffrence between ct and toroid
- Thread starter ahmd hasanein
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SG-1
Senior Member
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- Ware Shoals, South Carolina
A bushing or doughnut CT is a type of toroid. They are shaped like a ring.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
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- Electrical Contractor
Welcome to the forum! 
The CT sends a representational current through the meter, which reads the actual current because the CT and meter are designed to work together.
A toroid, or torus, is a doughnut-shaped transformer core, which is much more efficient at magnetic coupling than the standard laminated-iron type of core.
They're especially efficient at higher frequencies, and allow less magnetic leakage out of the core, so more of the primary energy is coupled to the secondary.
A CT may or may not use a toroid core.
A CT is a current transformer, which is used to sense or measure current without the actual load's current itself having to pass through the meter.
The CT sends a representational current through the meter, which reads the actual current because the CT and meter are designed to work together.
A toroid, or torus, is a doughnut-shaped transformer core, which is much more efficient at magnetic coupling than the standard laminated-iron type of core.
They're especially efficient at higher frequencies, and allow less magnetic leakage out of the core, so more of the primary energy is coupled to the secondary.
A CT may or may not use a toroid core.
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- Wisconsin
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- PE (Retired) - Power Systems
A toroid has its windings evenly spaced around its circumference, this helps with its accuracy especially when the 'primary' is not centered in the opening.
Simply looking at the shape of the device is not sufficient to decide if it is actually a toroidially wound CT or not.
Simply looking at the shape of the device is not sufficient to decide if it is actually a toroidially wound CT or not.
Hameedulla-Ekhlas
Senior Member
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- AFG
A current transformer is basically a toroid transformer. A toroid transformer is constructed with a hollow core similar to a doughnut.
See below picture please
- Location
- Wisconsin
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- PE (Retired) - Power Systems
A toroid is a subset of current transformer styles.
Hameedulla-Ekhlas
Senior Member
- Location
- AFG
I am agree with you.
LarryFine
Master Electrician Electric Contractor Richmond VA
- Location
- Henrico County, VA
- Occupation
- Electrical Contractor
As well as many other transformer types, of course. Modern high-power car amplifiers use them in the DC-DC converter, for example.
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