Answer / kc

An open delta is 2 transformers connected in delta. It is
used to get three phase power using 2 transformers.
A broken delta is 3 transformers connected in delta, but
not closing the delta. The voltage across the open corner
of the delta is used for voltage polarizing or ground
detection.

Answer / engineer tanweer hussain

in delta delta connection no difficulty faced against 3rd harmonic because path for circulating current is avoidable. Operating advantage in delta delta is that when one unit is removed from service the remaining can be operated in open open delta at reduced loading of 57% and not 2/3 of full capacity .
Proof.
Power in V/power in closed delta = (3)1/3 Vph Iph/3Vph Ih
= 1/1.732*100= 57.7%

Answer / sanjeet swarnakar

in open delta between there is no follow of current


But in broken delta 57 % load current folow between two
phases ...............

Answer / dayal varma

broken have some continuty open doesn't have any continuity

Answer / maqbool

There is no difference

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