Ask Question, Ask an Expert


Ask Electrical & Electronics Expert

problem 1: describe how high currents and voltages are measured with the assist of instrument transformers. Draw diagrams to describe your answer. describe the benefits of instrument transformers as regards extension of range of current and voltage on high voltage a.c. systems.

problem 2: Describe the drawbacks of shunts and amplifiers when used for extension of range. Describe how instrument transformers are a better replacement for shunts and multipliers especially for high range values.

problem 3: Define the given terms as used for instrument transformers:

a) Transformation ratio.
b) Nominal Ratio.
c) Terms Ratio.
d) Ratio correction factor.
e) Burden.

Use specific illustrations to exemplify your answer.

problem 4: Draw the equivalent circuit and phasor diagram of the current transformer. Derive the expressions for ratio and phase angle errors.

problem 5: Describe the effect of secondary burden on the ratio and phase errors of the current transformer.

problem 6: Describe the effect of the given on the performance of current transformers:

a) Change of primary winding current.
b) Change of secondary circuit burden and
c) Change of frequency.

problem 7: Describe the main sources of errors in current transformers. describe the design and constructional features employed in current transformers to decrease the errors.

problem 8: describe the constructional details of wound and bar type current transformers for reduction of the ratio and phase angle errors. describe the features incorporated in the windings to lessen the leakage reactance.

Electrical & Electronics, Engineering

  • Category:- Electrical & Electronics
  • Reference No.:- M97615

Have any Question? 

Related Questions in Electrical & Electronics

1 what is the basis behind the construction of the smith

1. What is the basis behind the construction of the Smith Chart? How does the Smith Chart simplify the solution of transmission-line problems? 2. Briefly discuss the mapping of the normalized line impedances from the com ...

1 a 15 v aa battery that costs 1 is rated at 18 ah what is

1. A 1.5 V AA battery that costs $1 is rated at 1.8 Ah. What is its cost per kWh? 2. Suppose a 12-V battery bank rated at 200 Ah under standard conditions needs to deliver 600 Wh over a 12-h period each day. If they oper ...

1 what are the different kinds of magnetic materials2 what

1. What are the different kinds of magnetic materials? 2. What is the magnetization vector? How is it related to the magnetic flux density? 3. Discuss how magnetization current arises in a magnetic material. 4. State the ...

In communication channels transmitted signal is propagated

In communication channels, transmitted signal is propagated simultaneously by several paths of varying lengths. This causes the signal to reach the destination with varying time delays and varying gains. Such a system ge ...

Write a paper to summarize a literature article for less

Write a paper to summarize a literature article for less than a page and its about a shoe taking power from piezo discussion. Article: Piezoelectric Materials Used in Underwater Acoustic Transducers by Huidong Li, Z. Dan ...

For the euler beam element shown in the figure derive the

For the Euler beam element shown in the figure, derive the interpolation functions, N I (ξ), stiffness matrix, k, and nodal force vector, f. Assume that the uniformly distributed load is  f (x) = f. Note that the referen ...

1 assume alice needs to send an e-mail to bob explain how

1. Assume Alice needs to send an e-mail to Bob. Explain how the confidentiality of the e-mail is achieved using S/MIME. 2. When we talk about authentication in SSL, do we mean message authentication or entity authenticat ...

In a real-time multimedia communication assume we have one

In a real-time multimedia communication, assume we have one sender and ten receivers. If the sender is sending multimedia data at 1 Mbps, how many RTCP packets can be sent by the sender and each receiver in a second? Ass ...

Show that the time-average value of the magnitude of the

Show that the time-average value of the magnitude of the Poynting vector given by (4.68) is one-half its peak value. For an antenna radiating a time-average power of 150 kW, find the peak value of the electric field inte ...

Give examples of numerical problems in network analysis

Give examples of numerical problems in network analysis with solutions and justification where, (1) Superposition theorem may be more useful than mesh/nodal analysis (2) The use of Thevenin's/Norton's equivalent circuit ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro