Question: For a (Delta)-Y connected, 15-MVA, (33: 11 mathrm{kV}) transformer with differential relay protection and (mathrm{CT}) ratios shown in Figure 10.52, determine the relay currents at

For a $\Delta$-Y connected, 15-MVA, $33: 11 \mathrm{kV}$ transformer with differential relay protection and $\mathrm{CT}$ ratios shown in Figure 10.52, determine the relay currents at full load and calculate the minimum relay current setting to allow $125 \%$ overload.

300/5A ip 33/11 kV 2000/5A

Step by Step Solution

★★★★★

3.46 Rating (146 Votes )

There are 3 Steps involved in it

1 Expert Approved Answer

Step: 1 Unlock blur-text-image

Question Has Been Solved by an Expert!

Get step-by-step solutions from verified subject matter experts

Step: 2 Unlock

Step: 3 Unlock

Students Have Also Explored These Related Systems Analysis Design Questions!

Dell Computers is a leader in the computer industry with over $90 billion in sales each year. A recent annual report for Dell contained the following note: 1. Assume that estimated warranty costs for...

A tech company updates phones and wants to make an aggregate production plan. Each worker on average can update 15 phones per hour. Each worker will receive a wage of 20 an hour and will work for 10...

TIM produces and sells two products, the MK and the KL. The organisation expects to sell 2 MK for every 2 KLs and have monthly sales revenue of GHe150,000. The MK has a C/S ratio of 20% whereas the...

An observer moves her eyes to the right at 1 deg / second, during which time the image of an object moves leftward on her retina at 2 deg / second. According to the theory of command signals, the...

Big win for government in wage bill battle The Constitutional Court has dismissed an appeal brought by public sector unions after the government reneged on aspects of its collective wage agreement...

Determine the CT ratios for differential protection of a three-phase, $\Delta-Y$ connected, 15-MVA, 33:11 kV transformer, such that the circulating current in the transformer $\Delta$ does not...

8 - 2 1 Three 1 5 resistors ( R ) and three 8 reactors ( x ) are connected in different ways across a 5 3 0 V , 3 - phase line. Without drawing a phasor diagram, calculate the line current for each...

A three - phase load of three equal impedances connected in delta, when connected across a balanced 4 0 0 V supply, takes a line current of 1 0 A at a power factor of 0 . 7 lagging. Calculate: a )...

Some modern power transmission systems now have major high-voltage DC transmission segments. There are a lot of good reasons for doing this but we will not go into them here. To go from the AC to DC,...

A 3-phase, 50 Hz, 3300 V star connected induction motor develops 250 hp, the power factor being 0.707 lagging and the efficiency 0.86. Three capacitors in delta are connected across the supply...

Problem 3 : Given a balanced, 3 phase, \ ( \ Delta \ ) - \ ( Y \ ) connected system with a line voltage at the source of 8 0 \ ( V _ { R M S } \ ) , a line impedance of \ ( 4 \ Omega \ ) , and a load...

Example 8 on the GRE workshop used the Wilcoxon signed-ranks test to evaluate the score differences of 0.5, -0.5, and 1.5. Suppose the test differences were 5.5, -0.5, and 1.5 instead of 0.5 -0.5,...

A saver deposits 8,450 in a savings account with an interest rate of 4.2%; after two years, the rate has fallen to 2.4%; then, four years later, it is lowered again to 1.80%. Three years later, the...

6 The statement of cash flows identifies cash receipts and disbursements that result Multiple Choice 0 0 . 2 5 : 4 2 from selling goods and / or services, exclusively. solely from a firm's...

Explain the four functions of management. AppendixLO1

Why is identifying the actors the first step in usecase modeling?

What is the objective of constructing the requirements use-case model, and what steps are to be followed?

What are the different types of relationships employed in a use-case diagram, and what are their purpose?

9) [3 marks) Find the truth set of each of these predicates where the domain is the set of positive integers. a) Q(x): x

Southern Healthcare and BestWell are for-profit HMOs that operate in Florida and Georgia. Currently, both are identical in every respect except that Southern is unleveraged while BestWell has $10...

If the 10% VaR of some assets is -15%, it means that ______. A. with 100%-10% = 90% probability (or 90% of the times), the return on the asset is -15% B. with probability 10% (or 10% of the times),...