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Three Phase AC Voltage Controller Manufacturer,Supplier and Exporter in India

Product Code : SCL-EELE-12965

Indian Lab Suppliers supplies the Three Phase AC Voltage Controller (Product ID: 12965) as part of its electronics engineering lab equipment range. It is a power electronics trainer that varies the voltage applied to a three-phase lamp or induction motor load with anti-parallel SCR pairs.

Quick Answer

Each phase has two SCRs (600 V / 16 A) connected back to back, and delaying their firing between 30° and 150° lowers the RMS voltage reaching the load. Three experiments are listed: the three-phase firing circuit, the controller with a lamp load, and the controller driving a 1 HP, 415 V squirrel-cage induction motor, where lowering the stator voltage reduces torque and speed. Firing pulses come from a ramp-comparator scheme with pulse isolation fed from a three-phase low-voltage supply, and gate and output waveforms can be viewed on the built-in isolated waveform unit (1500 V max).

Key Specifications

Parameter	Detail
Mains supply	415 V ±10%, 50 Hz, three phase
Power devices	Anti-parallel SCR pairs, 600 V / 16 A
Firing angle	30° to 150°, ramp-comparator firing with pulse isolation
Motor	Squirrel-cage induction motor, 1 HP, 415 V
Waveform unit	Isolated, 1500 V max
Meters (analog)	AC voltmeter 0–500 V; AC ammeter 0–5 A
Protection	TPN MCB 5 A
Dimensions	Panel W 600 × D 450 × H 600 mm; motor W 180 × D 350 × H 310 mm
Weight	Panel about 18 kg; motor about 23 kg

Where This Is Used

Used in power electronics and drives laboratories for AC phase-angle control and soft-start studies. It works at 415 V three phase with a rotating motor, so keep it earthed, connect with the supply off and measure only through the isolated input. Related: Three Phase Thyristorised AC Regulator with Triggering Circuit (Product ID: 12939) and Single Phase Bridge Converter Drive (Product ID: 12964). Browse the full Electronics Engineering Lab Equipment range or related Electronics Lab Equipment products.