what is the difference between upper impedance and lower
impedance distance relay?
Answers were Sorted based on User's Feedback
Answer / parag mohanty.
upper impedance is the impedance above which distance relay
will not operate and lower impedance is below which it will
not operate
Is This Answer Correct ? | 8 Yes | 2 No |
Answer / srikrishna kumar
the operation of the relays depended upon the magnitude of
current or power in the protected circuit. however,there is
another group of relays in which the operation is governed
by the ratio of applied voltage to current in the protected
circuit. such relays are called distance or impedance
relays. in an impedance relay, the torque produced by a
current element is opposed by the torque produced by a
voltage element. the relay will operate when the ratio V/I
is less than a predetermined value.
Is This Answer Correct ? | 13 Yes | 11 No |
1.what is meaing of ups,and used in softwares and sud stations,and main partes in ups. 2.main partes of the Disel Genarator. 3.main partes of the chiller and safty equipments.
How to measure power in 2 or 4 or n phase circuit? Please give me a formula.
which surface is suitable for NEUTRAL GROUNDING ?
Determine the MVA rating of the power transformer given that 110/66 kV,1000 Amps. Folks how can i calculate the MVA rating with this Data??Plz Help........
What are the different protection systems takes place on control panel board?
what s a servo motor? how to control the servo motor? and its application, purpose of using?
list the advantages of RCCB over other circuit breakers?
IF DISTANCE IS 100METERS B/W AMP.METER AND CURRENT TRANSFORMER WHAT WILL BE AFFECT IN ACCURACY .METER CAN SHOWING ACCURATE CURRENT OR NOT IF NOT WHAT CAN I DO TO GET 100% ACCURACY.
when neutral will carry the current?what could be the magnitude?
what is inter connected dc generator?
0 Answers Lovely Professional University,
What the difference between ac and dc inductor an capacitor
if two transformers are placed parallel & both have fault impedance of 50KA will it increase or decrease show example?