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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
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