Electronics &
Communication Technologies -Power Line Harmonic Analyser
Introduction
The AC supply voltage from electrical distribution system
is expected to be generally sinusoidal. However, due
to various end use equipment, harmonic currents and
voltages appear on power lines. The harmonics have frequencies
that are multiples of the basic supply frequency of
50 Hz.
Harmonic current sources are electrolytic processes
(Caustic soda plant, electroplating, etc.), Arc furnaces,
Railway traction and some power electronic equipment
like variable speed drives and inverters.
The harmonics on a power line are undesirable. Hence,
it is necessary to measure and monitor such harmonic
quantities to take suitable remedial actions.
The Harmonic Analyser developed by the institute is
an equipment to measure the individual level of harmonic
in voltage and current of the power line, upto 50th
order.
Specifications:Voltage Input: From system PT
Measuring range : 90 V to 145 Volts
Nominal Input : 110 Volts
Maximum input voltage : 440 Volts
Current Input: From CT
Measuring Range : 1 SMP to 6 AMPS
Maximum Input Current : 10 AMPS
Electrical Industry, electronics industry
Microprocessor based design.
Employs discrete fourier analysis method using sampling
technique for computation of harmonics.
Computes harmonics of both current and voltage individually
or simultaneously.
Harmonic measurement upto 50th order along with
total harmonic distortion.
Both manual and automatic operation are possible.
Results are printed on paper by 80 column printer.
Other parameters like harmonic phase relationships,
harmonic powers, system power factor in the presence
of harmonics distortion factor, etc. can be computed
by additional software programs to be developed
Transfer Forms: Negotiable
Main Application: Electrical/Electronics/Telecommunications
For further
information please contact :
Technology Bureau for Small Enterprises
APCTT Building, Qutub Institutional Area
P.O. Box – 4575
New Delhi – 110016, India
