what is difference between differential protection and
distance protection and how we calculate the sloop?
- 5 Answers
- 43633 Views
- OPS, Power Grid, I also Faced
- E-Mail Answers
Answer Posted / mohanraj
Differential protection is a unit protection, relay works
on the principle of Kirchoff's current Law.
Measuring element is Current Transformer.
The differential current measured between the incoming
current and Outgoing current must be negligible current
during stable and through fault condition. In case of
inzone fault or unstable condition (due to CT saturate)
relay will sense the differential current and issue the
trip signal.
Application: Transformer, Generator and Cable Protection.
**********************************************************
Distance protection is widely used in the transmission
network, its also called impedance protection because relay
operates with respect to fault impedance of the
transmission line. (Z=V/I)
Measuring element is Current Transformer and Voltage
Transformer.
Usually relay having 4 zones of the transmission line.
Zone1,Zone2,Zone3 will be forward zones (Towards the Line)
and zone 4 will be Reverse zone (Towards the Source).
| Is This Answer Correct ? | 51 Yes | 1 No |
Post New Answer View All Answers
What is the slip speed?
What facility we get after CT secondary earthing and how?
What is slope...? Explain slope 1 and slope 2...?
71ohm,111ohm,95ohm,179ohm in calculate the total ohm in series circuit
How we calculate the current carrying capacity of H.T. cabel?
What are the advantages of skewing of cage rotor conductors?
How many double suspension hardware fittings are required on a double circuit transmission tower?
What is the difference between a verilog task and verilog function?
why there using acb enclosure in big buildings
what is meaning of bus riser
please give me all the Alarm .Trip ,Safety Relays & Conditions of UPS Systems mail me on ashokbabunhce@gmail.com
How u can give the overload setting to any motor protection relay for a HT motors with formula and Example?
what does a string of resistors in a series will do?
explain transformer ct connection?
What is transient response?
