Answer / amit sharma

distance relay operates on the zone impedance. If impedance
seen by the relay in the zone is less than the rated imp.
then relay trips and the zone is isolated.

Answer / d ramesh

Distances relay senses the faulty zone if impedance seen by
the relay is below the set value then it operates and
isolates the faulty zone.

z=v/i below the set, then operates
zone1= 80% of protected line
Zon2=100%protected line + 50%shortest line
Zon3= 100%protected line + 100% longest line.

Answer / sukhvinder

relay works is ratio of voltage over current.line is
divided into zones zone 1,2,3. zone1 is 80 per of line and
set for immediately trip for line

Answer / limbian

Distance Protection Relay senses the faulty Zone by
recieving signal from Voltage Transformer

Answer / j.kesavan

it is sense sending end receving end voltage relay trip
depending upon voltage.

Why the Potential transformer Primary in connected to Earth?

2 Answers  

Please clarify, 1. Is it required to lay two runs of GI wire along with Armoured LT cable if it is laid between one big mains (63Amps TPN SDF) to small main (32A TPN SDF) with proper glanding termination? 2. If the armoured cable with proper glanding is laid from DB to CNC machine, is it required to run two runs of body earthing to the Machine from DB? 3.If the armoured cable with proper glanding is laid from Substation to Hangar, distance is approx. 100 mtrs, is it required to do earthing at shop area though the primary termination at substation is earthed through gland.

0 Answers   HAL,

what r substations?what r there work?why voltages r incresed and then reduced during distribution of power

0 Answers  

how to calculate the settings for shaft ct protn in hydro generators

0 Answers  

How to know the Max. current caring capacity of the cable by its size ?

0 Answers   SFPL,

what is the contact resistance of sf6 circuit breaker??

2 Answers  

How to decide the size of the capacitor for a single phase induction motor say 2 HP ??

0 Answers  

What is your favorite aspect of the engineering field?

1 Answers  

Can we generate 3 phase power from single phase connections?? If yes, how?

2 Answers  

how electricity is generated through electeic generator ?

1 Answers  

what is bus post insulator and its applications in substations

1 Answers  

the transient state stability limit of a system wherin power is transmitted throgh a double transmission line is (a)equal to steady state stability limit (b)more than its steady state stability limit (c)less than than its steady state stability limit (d)equal to its dynamic stability limit

1 Answers