Q2) put (v) or (x) for the following and correct the wrong: 1- It is not always a good idea to have low- voltage regulations, sometimes high impedance and high voltage regulation transformers are deliberately used to reduce the fault voltages in circuit. 2- In Ward Leonard Method the ampere turns are varied by varying the number of field turns. This type of arrangement is used in an electric traction system. 3- Torque produced in the armature is directly proportional to the flux per pole and the field current.

EBK ELECTRICAL WIRING RESIDENTIAL
19th Edition
ISBN:9781337516549
Author:Simmons
Publisher:Simmons
Chapter19: Special-purpose Outlets-water Pump, Water Heater
Section19.1: Water Pump And Branch Circuit
Problem 21R: Fill in the data for a 16-ampere electric motor, single-phase, no Code letters. a. Branch-circuit...
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Q2) put (v) or (x) for the following and correct the wrong:
1- It is not always a good idea to have low- voltage regulations, sometimes high
impedance and high voltage regulation transformers are deliberately used to reduce the
fault voltages in circuit.
2- In Ward Leonard Method the ampere turns are varied by varying the number of field
turns. This type of arrangement is used in an electric traction system.
3- Torque produced in the armature is directly proportional to the flux per pole and the
field current.
4 - At the time of starting of all DC Motors, except for very small motors, a starter must be
connected in series with the armature.
5- Transformer transfers electrical energy from one circuit to another through capacitive
coupled conductors (the transformer's coils).
6- Total losses = variable+ constant (iron, mechanical and copper shunt field losses) +
(series field and armature winding losses).
2
7- Ph = Ke Bmax f² t²V in dc machine.
%3D
A
B
Mech. power
developed
in armature
Output
iron and Friction
losses
Cu losses
Input
power
of motor
Égl, watts
VI watls
8- Vph2 = kVph1 ,V12 = V3Vph2 = V3K Vph1= KVL1 in Y- Y transformer connection.
Transcribed Image Text:Q2) put (v) or (x) for the following and correct the wrong: 1- It is not always a good idea to have low- voltage regulations, sometimes high impedance and high voltage regulation transformers are deliberately used to reduce the fault voltages in circuit. 2- In Ward Leonard Method the ampere turns are varied by varying the number of field turns. This type of arrangement is used in an electric traction system. 3- Torque produced in the armature is directly proportional to the flux per pole and the field current. 4 - At the time of starting of all DC Motors, except for very small motors, a starter must be connected in series with the armature. 5- Transformer transfers electrical energy from one circuit to another through capacitive coupled conductors (the transformer's coils). 6- Total losses = variable+ constant (iron, mechanical and copper shunt field losses) + (series field and armature winding losses). 2 7- Ph = Ke Bmax f² t²V in dc machine. %3D A B Mech. power developed in armature Output iron and Friction losses Cu losses Input power of motor Égl, watts VI watls 8- Vph2 = kVph1 ,V12 = V3Vph2 = V3K Vph1= KVL1 in Y- Y transformer connection.
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