What is function of CT PT unit?
What is function of CT PT unit?
One of the major difference between them is that the current transformer converts the high value of current into low value whereas the potential or voltage transformer converts the high value of voltages into low voltage….Comparison Chart.
| Basis for Comparison | Current Transformer | Potential Transformer |
|---|---|---|
| Impedance | Low | High |
What are the applications of CT and PT?
CT or Current Transformer & PT or Potential Transformer are measuring devices in AC system. These are also called as instrument transformers. As AC system deals with very high power hence we require Ammeter & voltmeter of humongous sizes to measure such high power which is impractical & expensive too.
Why is PT connected in parallel?
PT needs to be connected in parallel because we need to measure the voltage. CT is to measure the current ( like an ammeter) so it is connected in series with the conductor carrying that current. PT is to measure the voltage across an element ( like a voltmeter) so it is connected across that element.
Where is PT used?
Applications of Potential Transformer It is used for a metering purpose. For the protection of the feeders. For protecting the impedance of the generators.
What is use of PT?
Platinum is used in the chemicals industry as a catalyst for the production of nitric acid, silicone and benzene. It is also used as a catalyst to improve the efficiency of fuel cells. The electronics industry uses platinum for computer hard disks and thermocouples.
What is Pt ratio in meters?
The PT Ratio values are just the primary voltage divided by the secondary voltage. For example, 4200 / 120 = 35. In rare cases, it is also possible to use a reverse PT to step up a lower voltage like 12 Vac to 120 Vac to enable a WattNode meter to monitor 12 or 24 Vac power consumption.
Why KVA is the unit of transformer?
Transformers are rated in kVA because the losses occurring in the transformers are independent of power factor. KVA is the unit of apparent power. It is a combination of real power and reactive power. Transformers are manufactured without considering the load being connected.