Answer / iqbal ahmad

The very useful advantage of open delta connection is to
detect ground fault at any bus or line of a system. usually
open delta connection transformer is used in potential
transformer to detect ground fault as a 3rd core of PT.

Answer / swapnil

with use of open delta connection maintenance of
transformers is possible . If load on two transformers
increase than we can install another transformer and close
the delta in future .

Answer / sam khanji

open Delta will supply 57% if its rated value and give the
apportunity to increase the ratio by adding the missing leg
to become a complete delta.

Answer / niranajn

An open delta connection can supply power at 53.3% of its
rated value.

Answer / derekdejs64

In three phase system it use for Directional Earth Fault
relay voltage element.

Answer / dnyaneshwar

in unearth sysytem open delta connection is used for
detecting of earth fault & single phasing of equipment.


plz, anybody give another ans......
then welcome.

Answer / imtiaz khan

There are two biggest advantages:
1) In an unearthed system like capacitor banks, it is possible to detect ground faults though earth path is not available.

2) In case of bulk power transmission where transformer banks are used, their advantage is that if one leg is out for maintenance/replacement than also approx. 57% power can be transmitted.

Answer / subhankar nath

By the open delta connection of PT we can monitor the
neutral shifting of the system as well as it can be use in
the genetating end substation for the maintenance of the
transformer in the time of low load demand.

Answer / hitesh gohil

An open delta connected when full power is not needed.

Answer / ram

Open Delta Connection Means Potenial Transformer Secondary
Series Connection Was Given,And Grounded.This Line Was Zero
Potenial,When Voltage Flow For This Line Open And Trip The
Relay.Unbalace Voltage Came Also Trip The Ckt.

what is the advantage of using 3 phase line rather than using 2 phase line?

2 Answers   Havells,

11. As per the theory current doesn’t flows in Neutral, but practically it is not applicable, explain why? 12. How to take the Vector Group Test in Transformer? What is the purpose of doing Vector Group Test? 13. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV? 14. Why do we generate 3 Phase AC Supply? It is possible to generate 4 Phase and 5 Phase explain it? 15. Explain why the Voltage drop will happen in 3 Phase line? 16. What is the equipment used to control the generator output? 17. What are the factors to be considered during the Synchronization? 18. What should be value of Circuit breaker operating time and tripping time? 19. Why the CT Secondary is rated as 5A generally? 20. At which time Synchronous generator act as a Synchronous Condenser?

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first 3 men were there .again 3 came.total how much?

11 Answers   Wipro,

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