GE Multilin T60 Comprehensive Three-phase Transformer Relay

The technical specifications for GE Multilin T60 Comprehensive Three-phase Transformer Relay:

Percent Differential:

• Characteristic: Differential Restraint pre-set
• Number of Zones: 2
• Minimum Pickup: 0.05 to 1.00 pu
• Slope 1 range: 15 to 100%
• Slope 2 range: 50 to 100%
• Kneepoint 1: 1.0 to 4.0 pu
• Kneepoint 2: 4.0 to 30.0 pu
• 2nd Harmonic Inhibit Range: 1.0 to 40.0%
• 5th Harmonic Inhibit Range: 1.0 to 40.0%
• Operate Times:
  • Harmonic Inhibits Selected: 20 to 30 ms
  • No Harmonic Inhibits Selected: 5 to 20 ms
• Dropout Level: 97 to 98% of pickup
• Level Accuracy: ±0.5% of reading or ±1% of rated

Instantaneous Differential:

• Pickup Level: 2.00 to 30.00 pu
• Dropout Level: 97 to 98% of pickup
• Level Accuracy: ±0.5% of reading or ±1% of rated
• Operate Time: < 20 ms at 3 × pickup at 60 Hz

Restricted Ground Fault:

• Minimum Pickup: 0.000 to 30.000 pu
• Dropout Level: 97 to 98% of Pickup
• Slope Range: 0 to 100%
• Pickup Delay: 0 to 600.00 s
• Dropout Delay: 0 to 600.00 s
• Operate Time: 15 to 35 ms at 0 ms time delay

Phase/Neutral/Ground TOC:

• Current: Phasor or RMS
• Pickup Level: 0.000 to 30.000 pu
• Dropout Level: 97% to 98% of Pickup
• Level Accuracy: ±0.5% of reading or ±1% of rated
• Curve Shapes: IEEE Moderately/Very/Extremely Inverse; IEC (and BS) A/B/C and Short Inverse; GE IAC Inverse, Short/Very/Extremely Inverse; I2t; FlexCurve™ (programmable); Definite Time (0.01 s base curve)
• Curve Multiplier: Time Dial = 0.00 to 600.00
• Reset Type: Instantaneous/Timed (per IEEE)

Phase/Neutral/Ground IOC:

• Pickup Level: 0.000 to 30.000 pu
• Dropout Level: 97 to 98% of Pickup
• Level Accuracy: 0.1 to 2.0 × CT rating: ±0.5% of reading or ±1% of rated; > 2.0 × CT rating ±1.5% of reading
• Overreach: <2%
• Pickup Delay: 0.00 to 600.00 s
• Reset Delay: 0.00 to 600.00 s
• Operate Time: <20 ms at 3 × Pickup at 60 Hz
• Timing Accuracy: Operate at 1.5 × Pickup ±3% or ±4 ms (whichever is greater)

Phase Directional Overcurrent:

• Relay Connection: 90° (quadrature)
• Quadrature Voltage: ABC Phase Seq. and ACB Phase Seq.
• Polarizing Voltage Threshold: 0.000 to 3.000 pu
• Current Sensitivity Threshold: 0.05 pu
• Characteristic Angle: 0 to 359°
• Angle Accuracy: ±2°
• Operation Time (FlexLogic™ Operands): Tripping < 12 ms, Blocking < 8 ms