Product Core Brief
- Model: 350-L-PX-GX-H-E-N-N-V-SN-N-N
- Brand: GE Multilin
- Series: 350 Line Protection System
- Core Function: Protects transmission and distribution lines.
- Product Type: Microprocessor-Based Protection Relay
- Key Specs: Line Protection | High Impedance | RS485 Comms
- Condition: New Original / New Surplus
GE 350-L-PX-GX-H-E-N-N-V-SN-N-N
Product Introduction
The GE 350-L-PX-GX-H-E-N-N-V-SN-N-N acts as a dedicated line protection relay. This industrial automation unit clears faults rapidly to maintain grid stability.
This replacement module features high-impedance differential protection. It integrates seamlessly with SCADA networks for remote monitoring.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Protection Type | Line / Feeder |
| Architecture | Microprocessor-Based |
| Communication | RS485 / Ethernet |
| Protocol Support | Modbus / UR |
| Input Power | 120/240 VAC or VDC |
| Operating Temp | -40°C to +85°C |
| Enclosure Rating | NEMA 4X / IP65 |
| Analog Inputs | Multiple Channels |
| Contact Outputs | Form C Relays |
| Compliance | IEEE / IEC Standards |
Quality Control Process
Every replacement module undergoes rigorous functional testing. We inject primary and secondary currents first. Trip times must match factory specifications exactly. Next, we verify communication handshakes using Modbus polling. We then perform insulation resistance testing with a Megger. Dielectric breakdowns trigger immediate rejection. Finally, we inspect terminal blocks for torque marks. All units ship in anti-static shielding.
Replacement Pitfall Guide
❗ Verify Firmware Revisions. Older 350 series relays have different logic. Swapping units without checking firmware can cause misoperation. Always compare revision numbers first.
❗ Check CT Ratio Settings. The new unit won’t auto-detect your current transformers. Manually program the CT primary and secondary ratios. Incorrect settings cause false trips.
❗ Inspect Auxiliary Power. Ensure your DC supply matches the relay’s voltage rating. Applying 250VDC to a 125VDC module destroys the power supply board instantly.
❗ Map Output Contacts. Relay contact assignments vary by configuration. Do not assume terminal 1 is always the trip coil. Review the schematic before wiring.
Keep these in mind and you’ll cut 90% of rework time.
GE 350-L-PX-GX-H-E-N-N-V-SN-N-N
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| 350-L-PX-GX-H-E-N-N-V-SN-N-N | 350-L-PX-GX-H-E-N-N-V-SN-N-N | Direct | Identical electrical specs |
| 350-L-PX-GX-H-E-N-N-V-SN-N-N | 350-E-PX-GX-H-E-N-N-V-SN-N-N | Needs Adaptation | Enhanced series, verify logic |
| 350-L-PX-GX-H-E-N-N-V-SN-N-N | GE F650 | Needs Adaptation | Full migration, new config |
- Trip Response Time: <20 ms typical at 20x pickup.
- Measurement Accuracy: ±0.5% of full scale.
