GE SR745 Series 745-W2-P1-G1-H1 Protection Relay

General Information
– Brand: GE Multilin (General Electric)
– Model Number: 745-W2-P1-G1-H1 (SR745 Series)
– Product Name: 745 Series Transformer Protection and Management Relay
– Type: Microprocessor-Based Transformer Protection Relay
Core Electrical Specifications
– Control Power (HI configuration): 90–300 VDC; 70–265 VAC, 48–62 Hz
– Analog Input Impedance: 375 Ω ±10%
– Rated Input Current: 1–5 A (CT input)
– Rated Voltage: 5–65 V AC/DC (PT input)
– Frequency: 50/60 Hz, accuracy ±1%
– Digital Inputs: 16 programmable logic inputs
– Analog Outputs: 7 sensor channels, programmable 4–20 mA or 0–20 mA
– Solid-State Outputs: 15 A max, 250 VDC, 500 ms duration

Performance Parameters
– Protection Functions: Differential, overcurrent, restricted ground fault, inrush restraint, over/undervoltage, over/underfrequency, overload, overexcitation, etc.
– Communication Interfaces: RS232 (front), RS485/RS422 (rear), optional 10 Mbps Ethernet; supports ModBus RTU, ModBus TCP/IP, DNP 3.0 Level 2
– HMI: Enhanced LCD with keypad, status indicators

Environmental Parameters
– Operating Temperature: -40°C to 60°C
– Storage Temperature: -40°C to 85°C
– Relative Humidity: 5%–95% (non-condensing)
– Protection Class: IP20
Mechanical Parameters
– Dimensions: 229 mm (H) × 178 mm (W) × 241 mm (D) (approx. 9″H × 7″W × 9.5″D)
– Weight: Approx. 7.5 kg
– Mounting: 19-inch rack panel mounting