GE Multilin | 745-W2-P5-G5-HI | Transformer Protection System

Transformer and Frequency Specifications

Applicability

• Transformers:
  • Type: Two-winding or three-winding
• Frequency:
  • Nominal: 50 or 60 Hz
  • Frequency Tracking:
    • For 0.05 × CT < Current ≤ 1 × CT: 40 to 65 Hz
    • For Current > 1 × CT: 5 to 65 Hz
    • For Voltage > 50% of VT (only if voltage sensing is enabled): 2 to 65 Hz

Inputs

Control Power

• Options: LO/HI (specified when ordering)
  • LO Range: 20 to 60 V DC; 20 to 48 V AC at 48 to 62 Hz
  • HI Range: 90 to 300 V DC; 70 to 265 V AC at 48 to 62 Hz
• Power:
  • Nominal: 30 VA
  • Maximum: 40 VA
• Total Loss of Voltage Ride-Through Time: 16.7 ms
• Fuse:
  • Current Rating: 3.15 A
  • Type: 5 × 20 mm slow-blow Littelfuse, high breaking capacity; Model 2153.15
  • Note: Fuse not accessible

Phase Current Input

• Source CT:
  • Primary: 1 to 50,000 A
  • Secondary: 1 or 5 A
• Relay Input:
  • 1 A or 5 A (specified at order)
• Burden: Less than 0.2 VA at rated load per phase
• Conversion Range: 0.02 to 46 × CT at 50/60 Hz nominal frequency
• Accuracy:
  • At < 4 × CT: ±0.25% of 4 × CT (±0.01 × CT) at 50/60 Hz nominal frequency
  • At ≥ 4 × CT: ±0.5% of 46 × CT (±0.2 × CT) at 50/60 Hz nominal frequency
• Overload Withstand:
  • 1 second at 80 times rated current
  • 2 seconds at 40 times rated current
  • Continuous at 3 times rated current

Ground Current Input

• Source CT:
  • Primary: 1 to 50,000 A
  • Secondary: 1 or 5 A
• Relay Input:
  • 1 A or 5 A (specified at order)
• Burden: Less than 0.2 VA at rated load
• Conversion Range: 0.02 to 46 × CT
• Accuracy:
  • At < 4 × CT: ±0.25% of 4 × CT (±0.01 × CT)
  • At ≥ 4 × CT: ±0.5% of 46 × CT (±0.2 × CT)
• Overload Withstand:
  • 1 second at 80 times rated current
  • 2 seconds at 40 times rated current
  • Continuous at 3 times rated current

Voltage Inputs

• Source VT:
  • Range: 2 to 600 kV / 60 to 120 V
• Source VT Ratio: 1 to 5000 in steps of 1
• Relay Input: 60 to 120 V phase-neutral
• Burden: Less than 0.025 VA at 120 V
• Maximum Continuous Input: 273 V
• Maximum Accuracy Input: 260 V (full-scale)