745-W2-P5-G5-HI-R-E

Overview

745-W2-P5-G5-HI-R-E is a GE Multilin transformer protection relay designed for two- or three-winding transformers with advanced differential protection.

Applicability

• Transformers: Two-winding or three-winding

• Frequency: 50 or 60 Hz nominal

• Frequency tracking: 40–65 Hz (current ≤ 1 × CT), 5–65 Hz (current > 1 × CT), 2–65 Hz (voltage sensing enabled)

Control Power

• Options: LO/HI (specified when ordering)

• LO range: 20–60 V DC; 20–48 V AC

• HI range: 90–300 V DC; 70–265 V AC

• Power: 30 VA nominal, 40 VA max

• Ride-through time: 16.7 ms at 0% control power

• Fuse rating: 3.15 A

• Fuse type: 5 × 20 mm slow-blow Littelfuse

Protection Elements

• Operating current pickup: 0.05–1.00 × CT

• Dropout level: 97–98% of pickup

• Slope 1 range: 15–100%

• Slope 2 range: 50–100%

• Kneepoint (KP): 1.0–20.0 × CT

• Harmonic restraint: 0.1–65%

• Operate time (solid state): 26–52 ms depending on pickup

• Relay outputs 2–5 time: 30–56 ms depending on pickup

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