what is tertiary winding in transformer?What is its purpose?
Answer Posted / sri
some more information about tertiary winding
ref:
http://answers.yahoo.com/question/index?qid=20090731083908AADwAY1
One purpose may simply be to provide an additional terminal,
often at a different voltage. While the use of 'three
winding transformers' is relatively unusual, it can be a
powerful tool is system architecture.
The other objective for a tertiary winding is to provide a
closed-circuit path for zero-sequence currents/fluxes. That
is most typically the case with transformers that, for
system reasons, must be connected wye-wye (star-star for
those in the IEC world). With a wye-wye transformer, the
only path for zero-sequence flux is the tank of a
transformer (and if the three-phase bank is comprised of
three single-phase units, even that does not exist). The
tank is a high-impedance path, so the result is that the
zero sequence impedance seen looking into the transformer is
very high. Also, the circulation of zero sequence current
through the tank will cause the tank to heat and lead to
paint failure. A tertiary winding presents a low impedance
path to zero sequence currents, thereby reducing the zero
sequence impedance presented to the outside world, while
avoiding the problem of tank heating.
Is This Answer Correct ? | 18 Yes | 3 No |
Post New Answer View All Answers
Why is voltage is required to be within permissible range for an electrical equipment?
hello if any one have papers vof hpcl or sail, plz send me
what is the condition for YnD11
What will be the effect of circulating current in HT xlpe cable when both the armour ends are grounded. Will the termination fils after some time in case of 33 kv supply.
design of IGBT firing circuit for 11KV
What is Control & Relay Panel? And Remote Control Center?
How to calculate energy stored in an inductance?
Why we make earth connection with Transformer Body and What will be the minimum size of copper wire as per code with respect to KVA rating of Transformer?
how power is generated,and transmitted to our home..pls explain briefly in simple words.
Explain the process of commutation in a dc machine.
In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?
How to design the NGR Resistance
What will happen if we introduce negative feedback to a control system that uses a positive feedback?
any idea abt REVERSE METERING concept.........?
how we can calculate the efficiency of a diesel generator ?