Hello, friends
I’m Zahid Rahman it’s an EEE campus presentation. Today I’m discuses about PFI Controller Setting. The power factor regulator combines comprehensive operation with user-friendly control setting. It uses numerical techniques in computing the phase difference between the fundamentals of current and voltage, thus precise power factor measurement is achieved even in presence of harmonics. The power factor regulator is designed to optimize the control of reactive power compensation. Reactive power compensation is achieved by measuring continuously the reactive power of the system and then compensated by the switching of capacitor banks. The sensitivity setting optimizes the switching speed. With the built in intelligent automatic switching program, the power factor regulator further improves the switching efficiency by reducing the number of switching operations required to achieve the desired power factor. Usage of the capacitor bank is evenly distributed by the intelligent switching algorithm. This ensures uniform ageing of the capacitors and the contactors used. The four-quadrant operation feature allows the power factor regulator to operate correctly in the case of active power feed back to the mains where regenerative power sources are used. Harmonic current in the system can be harmful to the capacitor bank. This power factor regulator is capable of measuring the total harmonic distortion (THD) in the system and produce an alarm if the THD level is higher than the pre-set value. Other alarms include under/over compensate alarm, under/over current alarm and under/over voltage alarm. Current transformer (CT) polarity is important in determining the correct phase angle different between the current and voltage hence the power factor. This power factor regulator will automatically correct the CT polarity internally in the event that the polarity is reversed.
RATINGS AUXILIARY POWER SUPPLY
Current Supply voltage: 220~240 V AC/380~415 V AC
Operating Limits: -15% + 10%
Consumption: 10 VA max
Rated frequency: 50 Hz or 60 Hz
OUTPUT CONTACTS
Numbers of outputs: 6 / 8 / 12 / 14
(PFR60/PFR80/PFR120/PFR140)
Rated voltage: 250 V AC
Contact rating: 5 A
Expected electrical life: 100,000 operations at rated current
Expected mechanical life: 5 x 106 operations
Max current for the common terminals: 12 A continuous
CURRENT INPUT
Rated current (In): 5 A
Operating Limits: 0.05 A to 6.5 A
Rated Frequency: 50 Hz or 60 Hz
CONTROL RANGE
Power factor setting: 0.8 Ind - 0.8 Cap
C/K setting: 0.03 - 1.20 / Automatic
Switching sensitivity: 5 - 600 s/step
Reconnection time for same step: 5 - 240 s
THD threshold: 0.20 - 3.00 (20% -300%) / OFF
Switching Program: Automatic/Automatic Rotate/4-quadrant /Manual
Rated step coefficient: 0 / 1 / 2 / 3 / 4 / 5 / 6 / 8 / 12 / 16
(Automatic if C/K set to Auto)
ENVIRONMENTAL CONDITIONS
Temperature: -10°C to 55°C
Humidity: 5% to 95%, non-condensing
MECHANICAL
Mounting: Panel mounting
Dimension (mm): 144(w) x 144(h) x 90(d)
Enclosure protection: IP54 at the panel
Approximate weight: 1.2 kg
FEATURS
• Microprocessor based intelligent auto switching control
• Automatic C/K and rated step adjustment
• Automatic CT polarity correction
• Display of power factor, current & total harmonic distortion of current
• Programmable sensitivity
• Last step can be used as alarm/fan output
• Under/over voltage alarm, under/over compensate alarm & high harmonic distortion
alarm.
• User-friendly setting
• Complies with IEC 61000-6-2 standard
C/K Value Calculation Download link: https://docs.google.com/spreadsheets/d/1Du1CCrEMW3oZdKKjsrrIuRznTk8l3Wqo/edit?usp=share_link&ouid=116221217332174538825&rtpof=true&sd=true
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Thanking you.
Zahid Rahman