Answered: The appropriate DB for 1000KVA…

Engineering

Electrical Engineering

The appropriate DB for 1000KVA transformer is?

Electricity for Refrigeration, Heating, and Air Conditioning (MindTap Course List)

10th Edition

ISBN:9781337399128

Author:Russell E. Smith

Publisher:Russell E. Smith

Chapter7: Alternating Current, Power Distribution, And Voltage Systems

Section: Chapter Questions

Problem 23RQ

See similar textbooks

Related questions

Q: b) A transformer with a primary impedance of 1.2 KQ and a secondary circuit of impedance 100 KO.…

Q: A 600kVA three phase transformer has iron losses of 900W and full load copper losses of 8100W. Find…

A: For maximum efficiency of the transformer, the relation between the copper loss and the iron loss is…

Q: In a transformer energy is conveyed from primary windings to secondary windings through air Select…

A: The given statement is False. the energy is transferred from primary winding to secondary winding…

Q: 6. Solve the turns ratio of a three-phase transformer to transform 10,000 kVA from 230 kV to 4160 V…

A: In this question we will find turn ratio for different combinations of transformers .....

Q: A 8 kVA, 100 V /600 V single phase transformer has a secondary terminal voltage of 581.8 V when…

Q: Calculate all listed values for this transformer circuit: Rad 150 2 48 VAC 13000 turre 4000 tums…

Q: A 10 KVA, 2000/400 V single phase transformer has R1=50, X₁ = 120, R₂ = 0.20 and X₂ = 0.48 2.…

A: We have an single phase transformer having, Primary voltage = 2000 V Secondary voltage = 400 V R1 =…

Q: When the two-phase load at the secondary has a 0.9 p.f, the main transformer operates at 77.9% p.f…

A: In some industries , 2-phase supply system is required for operating certain loads such as Electric…

Q: There is no leakage in an ideal transformer Select one: O True O False

Q: transformer has a primary-to-secondary step-down ratio of 2:1 and a load connected to the secondary…

Q: Calculate all listed values for this transformer circuit: Rad 150 2 48 VAC (V 13000 turrs 4000 tums…

Q: Compute the copper losses at full load if a 500KVA transformer has 90% efficiency at both half-load…

Q: A 30kVA, 60Hz, 2400-600V step-down transformer has the following parameters. RHS=1.86, XHS=3.41,…

A: Given: 30kVA, 60Hz, 2400-600V step-down transformer having RHS=1.86, XHS=3.41, XM,HS=4962,…

Q: The step up transformer has transformation ratio less than 1 Select one: O True False

A: The transformation ratio is defined as the ratio of secondary voltage to primary voltage. It is…

Q: In which of the following transformer, the secondary winding is always short circuited by ammeter?…

A: In this question we need to choose a correct option.

Q: A single phase transformer of 50kVA has maximum efficiency of 80(%) at full load 0.9 lagging power…

Q: The number of turns on the primary and secondary windings of a 1-o transformer are 399 and 40…

Q: A16 The turns ratio of a isolating transformer is

Q: A single phase 100KVA 4000/240V 60 Hz. transformer, whose impedance refered to low voltage side is…

A: Transformer is a static electrical device which transfers power from one circuit to another circuit…

Q: Q13.i. Consider a single phase Transformer with secondary current, 3.5A and secondary Voltage, 11kV.…

A: Solution:- The power rating of a transformer is given by current in the transformer multiplied with…

Q: A transformer has 800 primary turns and 250 secondary turns. The primary and secondary resistances…

A: For this problem, we can solve each by using particular formula.

Q: The number of turns on the primary and secondary windings of a 1-p transformer are 415 and 38…

Q: The deterioration of insulation in a transformer is an internal cause of short circuit. Select one:…

A: Insulation failure in a transformer causes Short circuit of winding turns, which is an internal…

Q: he apparent power in primary and secondary side of the distribution transformer remains the same at…

A: Given In transformer apparent power remains same on primary and secondary side.

Q: The impedance of the primary windings of a single-phase transformer with a transformation ratio of 6…

Q: A load of 200 kW at 0.85 power factor is to be shared by two transformers 1 and 2 having the same…

A: In this question we will find load kVA supplied by each transformer......

Q: Draw the graph of efficiency against load current when the transformer is loaded 12:48 PM

Q: For the following transformer circuit, calculate: (1) Total impedance seen by the source (ii)…

A: In this question, We need to determine the impedance and primary voltage, secondary voltage and…

Q: A 25 kVA, single phase transformer has iron loss of 400 W and copper loss of 200 W at half load.…

Q: For the 11000/400V, AY 3-ph transformer, if the line current in the secondary is 500A calculate the…

Q: A single-phase, 2 kV/ 200 V, 50 Hz transformer has primary resistance of 3.5 Ω and reactance of 4.5…

Q: A transformer has 520 primary turns and 160 secondary turns. The primary and secondary resistances…

A: First we will refer secondary side resistance and reactance to primary side and than we will find…

Q: transducer has the positive temperature coefficient. If the core loss of single phase transformer at…

A: We need to tell about the positive temperature coefficient transducer and core losses at half load .

Q: 2- When the frequency of the voltage across of a (50HZ) power transformer increased by 10% of the…

A: For power transformer need to find when frequency increased by 10% the rated value the no load…

Q: Q. An experiment for determination of dielectric strength of transformer is done. If the breakdown…

Q: A single-phase step-down transformer is rated at 15 kVA, 440V/120 V. Compute the rated current of…

A: Given Data: Rating of transformer = 15 kVA Primary voltage = 440 V secondary voltage = 120 V

Q: 2. Ideal transformer with primary of 200 turns and secondary of 100 turns. The primary is connected…

A: In this question, Ideal transformer with primary turn and secondary turn is given. Primary supply…

Q: 1- Determine the magnitude of the series impedance parameters of Transformer(Req,Xeq) referred to…

Q: A transformer has 800 primary turns and 250 secondary turns. The primary and secondary resistances…

Q: 2. Find the turns ratio for the ideal transformer at right required to match the 10000 source…

A: Given data, Circuit diagram is given as,

Q: Calculate the daily efficiency of a single-phase transformer with an output capacity of 350 kVA at…

A: A transformer is an electrical machine which is used in AC circuit to either step up or step down…

Q: short circuit test of a single phase transformer, the ammeter gives us rated current. Select one:…

A: We need to tell about the given statement is true or false

Q: Calculate the percentage regulation of a transformer, if the No load secondary terminal voltage is…

A: Vnl =239 V Vfl = 207 V % R. = ( VNL-VFL) /(VFL) × 100% % R is percentage regulation

Q: Basic function of instrument transformer is to step up the AC voltage and current. Select one: O…

A: The most common usage of instrument transformers is to operate instruments or metering from high…

Q: A single-phase transformer rated 65 KVA is connected to 400/235 V,50HZ supply, has an efficiency of…

A: The solution can be achieved as follows.

Q: The maximum efficiency of a 200KVA, 6000/230volt, 50HZ, single phase transformer occurs at half load…

Q: Calculate Required size of core and calculate number of turns in primary and secondary for small…

A: It is given that: Vs or Vo=12 VIo=3 AVp=230 Vf=50 Hzη=90%

Q: A single phase practical transformer rated 100 kVA, 12470 volts primary, 600V secondary has a…

A: The power consumed by resistance is given as: P=I2R=0.101×0.101×220×103=2.244 kW The kVAR rating is…

Q: A 8 kVA, 100 V / 600 V single phase transformer has a secondary terminal voltage of 582.6 V when…

A: The no load secondary voltage is, 600 V The full load secondary voltage is 528.6 V.

Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

The appropriate DB for 1000KVA transformer is?

Expert Solution

Step 1

We are all very aware of the sound produces by practical transformer. It can be humming sound, crackling sound etc.

Diretly and indirectly sound depends on KVA rating of transformer and measurement of this sound is done by sound level in deibel( DB).

The transformers and corresponding sound levels per NEMA ST-20 are already provided.

Step by step

Solved in 2 steps

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, electrical-engineering and related others by exploring similar questions and additional content below.

Similar questions

For an ideal transformer, the efficiency is (a) 0 (b) 100 (c) 50
All values of a transformer are proportional to its __________________ ___________________.
For an ideal 2-winding transformer, an impedance Z2 connected across winding 2 (secondary) is referred to winding 1 (primary) by multiplying Z2 by (a) The turns ratio (N1/N2) (b) The square of the turns ratio (N1/N2)2 (c) The cubed turns ratio (N1/N2)3
An infinite bus, which is a constant voltage source, is connected to the primary of the three-winding transformer of Problem 3.53. A 7.5-MVA,13.2-kV synchronous motor with a sub transient reactance of 0.2 per unit is connected to the transformer secondary. A5-MW,2.3-kV three-phase resistive load is connected to the tertiary Choosing a base of 66 kV and 15 MVA in the primary, draw the impedance diagram of the system showing per-unit impedances. Neglect transformer exciting current, phase shifts, and all resistances except the resistive load.
(a) An ideal single-phase two-winding transformer with turns ratio at=N1/N2 is connected with a series impedance Z2 across winding 2. If one wants to replace Z2, with a series impedance Z1 across winding 1 and keep the terminal behavior of the two circuits to be identical, find Z1 in terms of Z2. (b) Would the above result be true if instead of a series impedance there is a shunt impedance? (c) Can one refer a ladder network on the secondary (2) side to the primary (1) side simply by multiplying every impedance byat2 ?
A single-phase step-down transformer is rated 13MVA,66kV/11.5kV. With the 11.5 kV winding short-circuited, rated current flows when the voltage applied to the primary is 5.5 kV. The power input is read as 100 kW. Determine Req1andXeq1 in ohms referred to the high-voltage winding.
A single-phase, 50-kVA,2400/240-V,60-Hz distribution transformer has the following parameters: Resistance of the 2400-V winding: R1=0.75 Resistance of the 240-V winding: R2=0.0075 Leakage reactance of the 2400-V winding: X1=1.0 Leakage reactance of the 240-V winding: X2=0.01 Exciting admittance on the 240-V side =0.003j0.02S (a) Draw the equivalent circuit referred to the high-voltage side of the transformer. (b) Draw the equivalent circuit referred to the low-voltage side of the transformer. Show the numerical values of impedances on the equivalent circuits.
A two-winding single-phase transformer rated 60kVA,240/1200V,60Hz, has an efficiency of 0.96 when operated at rated load, 0.8 power factor lagging. This transformer is to be utilized as a 1440/1200-V step-down autotransformer in a power distribution system. (a) Find the permissible kVA rating of the autotransformer if the winding currents and voltages are not to exceed the ratings as a two-winding transformer. Assume an ideal transformer. (b) Determine the efficiency of the autotransformer with the kVA loading of part (a) and 0.8 power factor leading.
A 23/230-kV step-up transformer feeds a three-phase transmission line, which in turn supplies a 150-MVA,0.8 lagging power factor load through a step-down 230/23-kV transformer. The impedance of the line and transformers at 230kVis18+j60. Determine the tap setting for each transformer to maintain the voltage at the load at 23 kV.
The ratings of a three-phase three-winding transformer are Primary(1): Y connected 66kV,15MVA Secondary (2): Y connected, 13.2kV,10MVA Tertiary (3): A connected, 2.3kV,5MVA Neglecting winding resistances and exciting current, the per-unit leakage reactances are X12=0.08 on a 15-MVA,66-kV base X13=0.10 on a 15-MVA,66-kV base X23=0.09 on a 10-MVA,13.2-kV base (a) Determine the per-unit reactances X1,X2,X3 of the equivalent circuit on a 15-MVA,66-kV base at the primary terminals. (b) Purely resistive loads of 7.5 MW at 13.2 kV and 5 MW at 2.3kV are connected to the secondary and tertiary sides of the transformer, respectively. Draw the per- unit impedance diagram, showing the per-unit impedances on a 15-MVA,66-kV base at the primary terminals.
The appropriate DB for 1000 KVA transformer is?
The low voltage side of a particular transformer has 747 turns while its high voltage side has 69471 turns,when connected as a step-up transformer, its secondary impedance is 371907 + J 250821 ohms. What is thenequivalent of this impedance in the primary side of the transformer?