RELAYS
Automatic Power Factor Correction Relay - PC2

PC2 Relay senses Reactive KVA of the system and controls the Power Factor by limiting the RKVA within preset limits. It switches capacitors in equal stages.

The Relay comprises of a RKVA sensing unit with adjustable limit settings to keep P.F. within desired limits. This sensing unit operates a reversible motorized switching unit (available in 4 to 20 stage operation) to switch capacitors through suitable contactors.

Besides the above basic configuration there is supply failure protection to automatically reset the relay to zero position on resumption of supply and prevent leading power factor. The Relay also has an on-Board testing facility for checking the operation of the Relay during maintenance.

Special Features

• Heavy Duty Electromechanical Relay that can withstand high system harmonics and surges, and is simple to maintain.
• Immune to switching surges of Capacitors.
• Provides dual Time Delay i.e. between stage to stage and also between switching ON & OFF/ OFF & ON of any stage. This ensures protection of capacitors and contactors even during extreme fluctuations of load.
• Senses RKVA hence no dead band is required for low load conditions.
• When used on L.T. It can be set to compensate for the impedance of Transformer.
• This is specially useful for P.F. improvement during low loads or no load conditions.

Technical Data
Ratings – 415/440V or 110V, 5a or 1 Amps C.T. secondary operated, 3 Ph 4 wire system.
Stages – 4 to 20, each stage contact rated for 5A, 415V AC, 500VA maxima.
Insulation withstand – 2KV rms for 1 minute.
Burden – Voltage coil 14VA, Current coil 2VA

Case
Flush 360W x 240H x 230 Deep mm (304 x 196mm cutout).