K B Enterprises

ACCUVAR is three phase measuring controllers, and hence need three CT inputs from the mains and also all the three phase and neutral connections. So, in addition to accurate control of VAR, this model also provides comprehensive electrical measurement. The parameters measured and displayed (depending on model selected ) are all voltages, currents, power factor, all powers and all energies, average PF maintained since last reset and THD figures for voltages and currents.

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.

The relay is meant for flush mounting in a panel for connection to the electrical system.The relay is the ‘intelligence’ which controls the automatic system for correction of the power factor. It senses the power factor by taking the ratio of the KW and the true rms KVA of the system, for any phase to neutral or phase to phase connections of the three phase electrical system.

This means that phase to neutral or phase to phase are connected to the meter as voltage inputs and current of the same phase or different phase as current input. For correct operation of the relay, however there are some minimum requirements should be met.

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• All readings are true RMS measurements
• Site selectable 1A or 5A CT secondary
• Automatic power factor control through system PF.
• Programmable target PF setting (from 0.800 to 1.000 LAG or LEAD)
• Programmable Time delay for step switching (Normal: 40-300, Fast: 1-10 Sec)
• Stage wise LED indication
• Auto/Manual mode selection through programming mode
• Normal/Fast switching control action is site programmable
• Alarm and tripping indication for over/under compensation and over/under voltage respectively
• Installation selection for phase to phase(L-L) or phase to neutral(L-N) input is site selectable
• Control action with/without capacitor CT is site selectable
• Switch ON/OFF banks manually in manual mode only

Thyristor Switching Modules are free of Mechanical Wear and Tear, operate without noise, and provide practically transient free switching eliminating inrush currents which are associated with Electromechanical Contactor Switching. An unlimited number of switching operations are possible, without applying significant stress to the capacitors.

Capacitor life is enhanced by more than three times normal life due to smooth connection and disconnection.