Electric Circuit Analysis: Unit IV: Three phase circuits
Phase sequence
Three phase circuits
RYB is called positive phase sequence whereas RBY is called negative phase sequence. Unless specified clearly, we take positive phase sequence.
PHASE SEQUENCE
In
fig 4.1(b), the peak value of voltage is the same in all the phases. But, the
maximum values are attained at different times. The order in which the
alternating quantities attain their maximum values is called the phase
sequence. For the clockwise direction of rotation of the rotor field, the phase
sequence is R Y B. It means that, the voltage in Y-phase reaches its maximum
value 120° later than that in phase R. And, the voltage in B-phase reaches its
maximum value 120° later than that in Y- phase.
If
the direction of rotation of the field is reversed (ie., anti clockwise
direction), the phase sequence becomes RBY.
RYB
is called positive phase sequence whereas RBY is called negative phase sequence.
Unless specified clearly, we take positive phase sequence.
The
phasors can be named as R,Y, B, or A, B, C or 1, 2, 3. We prefer R,Y, B to
other methods. It is because, we can give different colours to the conductors
for easy identification (R-Red, Y-Yellow, and B-Blue or Black).
Electric Circuit Analysis: Unit IV: Three phase circuits : Tag: : Three phase circuits - Phase sequence
Electric Circuit Analysis: Unit IV: Three phase circuits
Under Subject
Electric Circuit Analysis
EE3251 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Related Subjects
Professional English II
HS3251 2nd Semester 2021 Regulation | 2nd Semester Common to all Dept 2021 Regulation
Statistics and Numerical Methods
MA3251 2nd Semester 2021 Regulation M2 Engineering Mathematics 2 | 2nd Semester Common to all Dept 2021 Regulation
Engineering Graphics
GE3251 eg 2nd semester | 2021 Regulation | 2nd Semester Common to all Dept 2021 Regulation
Physics for Electrical Engineering
PH3202 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Basic Civil and Mechanical Engineering
BE3255 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Electric Circuit Analysis
EE3251 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Physics for Electronics Engineering
PH3254 - Physics II - 2nd Semester - ECE Department - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation
Electrical and Instrumentation Engineering
BE3254 - 2nd Semester - ECE Dept - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation
Circuit Analysis
EC3251 - 2nd Semester - ECE Dept - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation
Materials Science
PH3251 2nd semester Mechanical Dept | 2021 Regulation | 2nd Semester Mechanical Dept 2021 Regulation
Basic Electrical and Electronics Engineering
BE3251 2nd semester Mechanical Dept | 2021 Regulation | 2nd Semester Mechanical Dept 2021 Regulation
Physics for Civil Engineering
PH3201 2021 Regulation | 2nd Semester Civil Dept 2021 Regulation
Basic Electrical, Electronics and Instrumentation Engineering
BE3252 2021 Regulation | 2nd Semester Civil Dept 2021 Regulation
Physics for Information Science
PH3256 2nd Semester CSE Dept | 2021 Regulation | 2nd Semester CSE Dept 2021 Regulation
Basic Electrical and Electronics Engineering
BE3251 2nd Semester CSE Dept 2021 | Regulation | 2nd Semester CSE Dept 2021 Regulation
Programming in C
CS3251 2nd Semester CSE Dept 2021 | Regulation | 2nd Semester CSE Dept 2021 Regulation