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.


All models are single phase measurement. APFCR & NEWTON+ needs a CT input from the mains as well as from Capacitor Bank (For VAR mode operation). NANOVAR take only one current input from the mains, since they have only basic PF control option. Voltage input is taken from phase & neutral.

Ease of installation

These controllers are user friendly and easy to program. There is no need to program C/K or bank sizes manually.

Low current operation

In VAR mode operation (Available in APFCR and NEWTON+) these controllers can sense as low as of 1% of the main load and take corrective action. PF control option requires minimum 2.5% of mains current for Newton+(Fast) and 6% of mains current for others.

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.

Comparison Chart

No. Of Stages 4 to 16 6/8 optocouplers 4/6/8 Relays 4/5/6 Relays
ALARM on PF Value (Optional) Y Y Y -
Fast Switching - Y - -
Stage Indication LED LED LCD LCD
LC Display 16 x1 16 x 2 16 x 2 16 x 1
Intelligent Control Y Y Y -


Type Name Statistics
Input Supply One Phase and Neutral of 3P4W system
Voltage Direct Voltage Input: Up to 300V L-NBurden: 0.5 VA
Current Secondary 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 Supply Wide operating Voltage SMPS : 80 VAC - 480 VAC, 50-60 Hz
Output Relay Switching 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
Measurement True RMS Basic Parameters Voltage(Volts L-N: VRN, VYN, VBN) Accuracy: 0.5% of Reading
Current(Amps IR,IY, IB) Accuracy: 0.25% of Reading
Capacitor Current CT Ration: Site Selectable (In APFCR & NEWTON+ only)
Accuracy: 1.0% of Reading
Power Factor Accuracy: 1.0% of Reading (IPFI>0.5)
Range of Reading: 0.05 to 1.00 Lag/ Lead
Miscellaneous Dimensions Bezel 144 X 144 mm (APFCR), 96 X 96 mm (All other three models)
Panel Cutout 138 X 138 mm (APFCR), 92 X 92 mm (All other three models)
Depth of installation 55 mm
Operating temp 10°C to 50° C
Weight 0.730 Kgs (Approx.) for APFCR, 0.376 Kgs (Approx.) for all other three models
Min. Operating Current 1% of CT primary in VAR mode, 2.5% in PF mode