Transformer protection unit
The TPU2000 is an advanced transformer protection package designed for protection of two-winding 3-phase power transformers. Sensitive high-speed restrained and unrestrained differential elements protect against internal phase and ground faults. Multiple restraint curves match electronic and electromechanical relays easing retrofits. Flexible harmonic restraint modes prevent false trips during transformer inrush and overexcitation. Phase and ground overcurrent elements for each winding plus disturbance and current level detectors, power metering, digital fault recording and load profile completes a full transformer management system.