What CT is used in 33 KV SS?

Oil Filled 33 Kv 33kv Current Transformer, Accuracy Class: 0.2

Accuracy Class	0.2, 0.2s
Material	oil filled
CT Ratio	400/1 or as required
Rated Voltage	33 KV
Usage/Application	Transmission and Distribution

What is the use of CT in substation?

Current transformers are used for protection, measurement and control in high-voltage electrical substations and the electrical grid.

What is the rating of transformer used in 33 11kV substation?

Introduction to Electricity Distribution System 11 KV Primary Distribution system is emanating from 33/11 KV Substations feeding power supply to HT Consumers and 11000/440-220 volts Distribution transformers for supply to LT Three Phase and Single-Phase consumers.

What is need of CT and PT?

CT and PT are used where large quantities of currents and voltages are used. The job of CT and PT is to reduce high current and high voltage to a parameter. With the help of this parameter, we can measure the current flowing at high volume and voltage.

What is the meaning of 33 11kV substation?

Thus, when a substation is of rating 66/11 kV, means substation has been designed to receive 80 MVA on 66 kV and it will distribute the received power on 11 kV. Again, substation of rating 33/11kV means, the substation has been designed to receive 5 MVA of power at 33 kV and it will distribute the same on 11 kV.

How many CT’s are in a 400 amp service?

For example, a typical installation in a 120/208 service 400 amp service contains 200:5 CT’s. When 200 amps are flowing through the primary side of the CT, 5 amps are coming out of the secondary terminals.

What is the use of CT in a substation?

Current measured by CT is used to trip the circuit breaker during the abnormal situation. To summarize it CT is used for measurement and control in a substation. The Rock reveals the key to success for normal people. The big companies don’t want you to know his secrets. Why do we use power transformers in a substation?

What is the maximum load current on a 500 kVA transformer?

For example, given a metering CT with a 500/5 ratio and a TRF of 2.0x, the maximum load current should be less than 1000 A or else the CT will exceed its rated maximum temperature rise. In your case, you would like to meter a 500 kVA transformer.

What is the CT ratio of a current transformer?

For current transformer whether it’s used for measurement or for protection, it has more no. of turns at secondary side than that at primary side winding. Normally, the CT’s secondary rated current is kept either at 1A or at 5A depending upon its requirement. Now let’s take a case where the CT ratio is 1000:5 .