Answer / sanset

Partial discharge (Pd) fault detection is a well proven
test method that relies on the detection of small electrical
discharges generated in faulty areas of electrical
insulation. It is also a method under consideration for
future on-line monitoring systems particularly in the area
of asset management of transformers. Much of the fundamental
principles of capturing Pd pulses were developed in academic
environments. However the limitations of Pd fault detection
is that it requires considerable operator skill in detecting
Pd pulses and interpreting results. It has been estimated
there are less than 200 operators in the world, capable of
correctly conducting and interpreting Pd testing.
Consequently, to-date Pd test has largely been limited to
the laboratory and low electrical noise environments.

The theme of more contemporary work has been the
identification of Pd pulses in extremely electrically noisy
environments requiring a rare combination of expertise, HV
technology and intelligent systems. Several concepts through
industrial collaboration have been identified that have lead
to the development of algorithms permitting recognition of
Pd pulses barely discernible with traditionally applied
visual analysis. Finding that the successful recognition of
Pd and the ability to accurately predict Pd pulse shapes
under fault conditions; requires substantial historical
behaviour details, based on a knowledge of localised
background noise indigenous to the subject equipment.
Currently work is being undertaken, researching techniques
to predict the unique nature of Pd pulses generated within
particular electrical environments, by sophisticated
analysis (feature specific) of local conditions.

how the diesel generator maintain the rpm when the generator loaded varies from 10% to 70% immediately?

3 Answers  

---

what is the difference between unarmoured & Flexible cable? How to identified?

0 Answers   Priyanka Electricals,

---

What is the magnetic field (coil DC ) of Turbo Expander?

0 Answers   TATA,

---

What work have you done on full chip Clock and Power distribution? What process technology and budgets were used?

0 Answers   Divis Laboratories, Intel, Sainor Labs,

---

what is neutral voltage

3 Answers   Power Grid,

---

What is the Load Capacity of Panther conductor (0.2) and dog conductor (0.2) 

0 Answers   Greenko Group,

---

What will be result if we connect LT votage to the terminal of HT Transformer?

3 Answers   Equate,

---

What should be ideal IR value for 11kV, un earthed, 1 MW motor?

3 Answers   Sail,

---

What is the name of powder which is used in inner side of a cable? and purpose?

1 Answers  

---

why synchronous motor has zero starting ?

8 Answers   NTPC,

---

what is neutral ground resistance relay? how it is helpful in protecting system?

5 Answers  

---

explain the types of drives

0 Answers  

---