What is the purpose of SOTF being used inspite of distance
Protection given?
Answer Posted / p anbarasu
During energisation of the line vt input is near to zero. at that time any fault happens in the line distance protection is not able to operate because vt is near to zero. So we are enabling the SOTF protection in the relay.
SOTF function: The relay will check if any fault happens during energisation with in the 20ms, if fault is presents the relay will operate as a simple O/C relay and its isolate the healthy section from faulty dection.
Current detection(A,B&C) and No Voltage detection(A,B&C)--> 20ms Delay ---> Trip
Is This Answer Correct ? | 29 Yes | 7 No |
Post New Answer View All Answers
WHY BLADE & JOW OF ISOLETOR IN SUBSTATION?
What is the role of power pack in substation protection system?
what is mean by dual digital protection in the relay field?
The ripple frequency in output of fullwave bridge rectifier is a. Half the input b. Twice the input c. Same as input
what is photo voltic cell,& what are the materials associated with that?and any spcifications like volts/cm etc?
why incomer bay is required before transformer bay if there are more than 1 nos. of transformer bay.
what ispositive, negative, zero sequence impedence?
TRANSFORMERS WITH DC SUPPLY
How to calculate pitch, gauge of winding wire, and No. of turns for 30HP, 3 phase, 4 poles 50Hz, 380V induction motors
Why the efficiency of generator is more than motor in swinburne's test
how to avoid Saturation in C.T?
why are installed water leakage detection system data centers & server rooms
How to design harmonic filter at the project stage without nowing the harmonics levels
What is the different types of cable & current capacity of cable
Why is it prefer to initiate circuit breaker failure by "86" lockout relay not by "94" tripping relay ?!