Product Details
The GE SR-735-5-5-HI-485, also cataloged as the SR735 Feeder Protection Relay, operates as a dedicated hardware component for overcurrent protection and fault detection within utility and industrial distribution network infrastructure.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SR-735-5-5-HI-485 |
| Brand | GE Multilin |
| Origin | Canada / United States |
| Weight | 5.35 kg (11.79 lbs) |
| Dimensions | Standard SR735 Panel Mount Profile |
| Operating Temp | -20 - 60 deg C |
| Power Consumption | Control Power: 90 - 300 VDC, 70 - 265 VAC @ 50/60 Hz |
| Protection Elements | 50/51 (Phase Overcurrent), 50G/51G (Ground Overcurrent) |
| Phase CT Secondary | 5 A |
| Ground CT Secondary | 5 A |
| Local Interface | RS485 2-wire serial connection |
Firmware Flash Compatibility and Processing Architecture
The relay evaluates secondary current transformers scaled for 5 A nominal inputs, driving dedicated protective math channels directly inside the hardware execution loop. Phase and ground overcurrent states execute based on ANSI 50/51 and 50G/51G curve computations. Synchronous logic integration with local substation SCADA architectures requires matching firmware flash compatibility layers across the RS485 2-wire serial link to prevent communication buffer timeout errors during heavy transient trip events.
Frequently Asked Questions
Q: Can the SR-735-5-5-HI-485 relay chassis be withdrawn or hot-swapped while the secondary CT circuits are live?
A: No. The current transformer secondary circuits must be externally shorted via a test switch block before any chassis removal. Extracting a live relay card without shorting the CT circuit will induce destructive open-circuit high voltage across the terminal block.
Q: How is the RS485 network topology affected during firmware flash compatibility adjustments?
A: Firmware differences between individual nodes can reset device address and baud rate registers to factory defaults. Substation automation loops must verify matching register mapping configurations post-flashing to maintain deterministic poll schedules.
Field Installation Guidelines
- Current Transformer Termination: Attach all 5 A phase and ground CT secondary wires firmly to the specified high-current screw terminal strip, ensuring minimum contact resistance.
- RS485 Serial Link Isolation: Route the RS485 2-wire serial network cabling using shielded twisted-pair (STP) conductors, keeping physical separation from heavy power bus lines.
- Control Voltage Grounding: Terminate the shield layer of the communication cable at one single point in the grid, and ensure the relay chassis ground lug links directly to the local sub-station earth ground bar.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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