In transformer how measure the winding temperature ?
- 5 Answers
- 21944 Views
- I also Faced
- E-Mail Answers
Answer Posted / mohamed
how to select the CT ratio for WTI
the answer :
SCIENTIFIC CONTROLS Mechanical Instruments are incorporates
proven design features acquired from many years of
experience in providing Temperature Indicators/Controllers
for Power & Distribution Transformers.
Oil Temperature Indicator: The Oil Temperature Indicator
(OTI) measures the Top oil Temperature. It is used for
control and protection for all transformers.
Winding Temperature Indicator: The Winding is the component
with highest temperature within the transformer and, above
all, the one subject to the fastest temperature increase as
the load increases. Thus to have total control of the
temperature parameter within transformer, the temperature
of the winding as well as top oil, must be measured. An
indirect system is used to measure winding temperature,
since it is dangerous to place a sensor close to winding
due to the high voltage. The indirect measurement is done
by means of a Built-in Thermal Image.
Winding Temperature Indicator is equipped with a specially
designed Heater which is placed around the operating
bellows through which passes a current proportional to the
current passing through the transformer winding subject to
a given load. Winding Temperature is measured by connecting
the CT Secondary of the Transformer through a shunt
resistor inside the Winding Temperature Indicator to the
Heater Coil around the operating Bellows. It is possible to
adjust gradient by means of Shunt Resistor.
In this way the value of the winding temperature indicated
by the instrument will be equal to the one planned by the
transformer manufacturer for a given transformer load.
| Is This Answer Correct ? | 22 Yes | 1 No |
Post New Answer View All Answers
What is the function of auadag in a cro?
Is phenomenon of resonance is harmfull fr the machine? if not or if yes please explain it?
IF % IMPEDANCE OF A TRANSFORMER IS INCREASED FROM 5.8% TO 8% HOW MUCH THE EFFICIENCY OF THE TRANSFORMER WILL COME DOWN?
How is the connection of the tap changer on the HV side been made?
what is a pilot wiring and whys that called a pilot wiers
explain transformer ct connection?
Can any one provide the inspection procedure of MIMIC for VFD panel? Details: If someone wants to have a mimic in the VFD panel what are inputs considered for the mimic(like on,off,trip) whether we are able to add speed variation in the mimic(if so how can we get) and what are the parameters to be checked in the MIMIC during inspection?
our factory is going under construction mean time transformer 1000 kva 2 nos &load break swithch 12 kv & 4 nos 750 kva 2 nos & 380 kva 2 nos generator to be errcted.how to arrange earth pits &how to earth connect & neutral pit how to calculate in earth bit size.
how can we calculate the ratio of caustic soda and water in lrs.
what is physical distance of isolator to VCB in 33/11kv sub stations
What is the effect on in Zone and out zone fault if Phase side CT is Vk/2<30 mA and Neutral side is CT is Vk/4<30 mA for Transformer REF protection
How Diesel Generator start ?
Difference between drift current and diffusion current?
how the testing of protection CT Testing done through Primary injection kit please describe in detail procedure...
in power generator normaly voltagr betwween esth to neutral is 0 but my work place generator show the volatge is 60v any body know why? thanks
