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Automatic Power Factor Correction Relays

We are a leading Wholesale Supplier of apfc relays from Dombivli, India.



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Approx. Rs 11,000 / EACHGet Latest Price


TRINITY has a versatile range of Power Factor Correction relays suitable for all applications. These controllers are available in economy version with minimum features, intelligent models with advance control algorithm and also sub-second switching models with solid state outputs.

The entire series is economical user friendly and extremely reliable. Designs of these have been field proven for nearly fifteen years with more then 10000 units in service.

Intelligent Control


The control parameter is VAR, and not PF. Target PF value is just used to calculate the capacitive VAR required to be added/removed to achieve the desired PF. e.g. If the target PF is unity, means that the target VAR in the system is zero. If system KVAR is 200 lagging, then the controller needs to add 200 KVAR of capacitor banks to reach zero VAR.

The calculation of the reactive power in the system is done by taking instantaneous samples of all voltage and current waveforms, in all four quadrants. These values are then subjected to DSP techniques to add a frequency independent 90° phase shift to current samples. The product of these voltage and current samples then generate signed VAR value.

VAR controller then takes into calculation the prevailing system KVAR, the prevailing bank KVAR and the bank sizes of each stage, and then switches ON/OFF the combination which is closest to the needed VAR.

This assumes a balanced loading of the electrical system. For unbalanced load conditions, Accuvar model is re-commanded.



InputSupplyOne Phase and Neutral of 3P4W system
VoltageDirect Voltage Input: Up to 300V L-NBurden: 0.5 VA
CurrentSecondary Current Input: 5A or 1A (To be specified at the time of Ordering) 
CT Ratio: Site Selectable (In APFCR & NEWTON+ only) 
Range of Reading: 0-5000A 
Burden: <1.0VA 
Overload: 5A CT = 6A RMS Continuous 
1A CT = 1.2A RMS Continuous
Power SupplyWide operating Voltage SMPS : 80 VAC - 480 VAC, 50-60 Hz
OutputRelaySwitching Voltage: Max. 250 VAC 
Switching Power: Max. 1000W 
Expected Mechanical Life: >10 X 106 switching operations 
Expected Electrical Life: > 4 X 106 switching perations 
@ (Load = 200VA, Cosp = 0.5)
Optocoupler(Fast Newton+)VCE(max)-40 VDC; Imax-30 mA
MeasurementTrue RMS Basic ParametersVoltage(Volts L-N: VRN, VYN, VBN)Accuracy: 0.5% of Reading
Current(Amps IR,IY, IB)Accuracy: 0.25% of Reading
Capacitor CurrentCT Ration: Site Selectable (In APFCR & NEWTON+ only) 
Accuracy: 1.0% of Reading
Power FactorAccuracy: 1.0% of Reading (IPFI>0.5) 
Range of Reading: 0.05 to 1.00 Lag/ Lead
MiscellaneousDimensionsBezel144 X 144 mm (APFCR), 96 X 96 mm (All other three models)
Panel Cutout138 X 138 mm (APFCR), 92 X 92 mm (All other three models)
Depth of installation55 mm
Operating temp10°C to 50° C
Weight0.730 Kgs (Approx.) for APFCR, 0.376 Kgs (Approx.) for all other three models
Min. Operating Current1% of CT primary in VAR mode, 2.5% in PF mode

Additional Information:

  • Minimum Order Quantity: 1 EACH
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Devdatta Pawar (Proprietor)
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Plot No. X-20/1, Near Police Quarters, MIDC, Phase II, Domvibali East, Dombivli East
Dombivli - 421203, Thane, Maharashtra, India
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