GE F650-N-F-L-F-2-G-1-HI-P-6E Feeder Protection Relay

Description

Product Introduction & Engineering Value

Managing sub-cycle trip timing while maintaining breaker health metrics usually requires stacking multiple panel devices. The GE Multilin F650-N-F-L-F-2-G-1-HI-P-6E integrates full-spectrum feeder protection (50/51, 50G/51G, 27/59, 81O/81U) with native bay control and programmable logic (FlexLogic) into a single draw-out chassis.

Configured with high-range power supply modules and dual Ethernet ports, this specific ordering code handles high-density IEC 61850 substation automation architectures without latency bottlenecks. It delivers precise waveform recording and high-speed tripping circuits designed to withstand high EMI substation switchyard conditions.

Technical Specifications

Field Application & The “Trench” Experience

The Trench Story: A utility substation serving a chemical processing plant suffered repetitive nuisance trips during transformer energization due to second-harmonic inrush currents. The legacy electromagnetic relays couldn’t differentiate between fault current and magnetizing inrush. Upgrading the bay to the F650-N-F-L-F-2-G-1-HI-P-6E allowed engineers to enable second-harmonic restraint and deploy custom FlexLogic equations. The result: zero false trips on transformer startup, with full IEC 61850 GOOSE messaging feeding real-time event logs directly to the SCADA headend.

Niche Application Scenarios

• Industrial Substation Bus Transfer Schemes: Executes fast automatic bus transfer (ABT) switching logic using peer-to-peer GOOSE messaging.
• Renewable Interconnection Feeder Protection: Provides directional overcurrent (67) and frequency/voltage element decoupling for solar/wind farm grid ties.
• Mining Medium-Voltage Breaker Control: Harsh-environment (conformal coated) protection against dust and sulfur-induced trace corrosion in underground distribution racks.

Transparency SOP: QA & Testing

1.Power Supply Verification] ➔ Hi-Pot dielectric test + DC voltage sweep across 110-250V limits.

2.Secondary Current Injection] ➔ 3-Phase OMICRON testing of 5A Phase & 1A Ground CT pickup curves.

3.I/O Channel Mapping] ➔ Wetted contact opto-input verification (16 DI) & Form A relay output timing (8 DO).

4.Network Protocol Audit] ➔ Ethernet packet drop analysis + IEC 61850 GOOSE speed verification over dual RJ45.

F650-N-F-L-F-2-G-1-HI-P-6E

F650-N-F-L-F-2-G-1-HI-P-6E

The Veteran’s Tech Trap Guide

• ⚠️ Mismatched Ground CT Ratio Hazard: Note the N in the ordering code—this unit takes 5A Phase CT inputs but requires a 1A Ground CT input. Wiring a 5A ground CT circuit into the 1A terminal will scale your earth fault calculations by 500%, leading to immediate false ground fault trips as soon as load current flows!
• PRO TIP: Check CT Shorting Switches Before Draw-Out Removal: Although the F650 uses an automatic CT shorting mechanism when the relay is drawn out from the case, always double-check external test switches (e.g., FT-1 blocks) prior to pulling the chassis. Debris or worn shorting leaf springs inside an old case can leave a 5A CT secondary open-circuited—generating dangerous high voltages.
• ⚠️ Ethernet IP Dual-Homing Confusion: The 6E option provides dual RJ45 ports. Be aware that depending on your firmware version, these ports may share a single MAC address for redundant ring topologies (RSTP/PRP). Do not attempt to assign separate subnet IP addresses to both ports unless configured explicitly in single-IP failover mode.

Dynamic FAQ

Q: Can I load a backup config file from an F650 with a different order code into this unit?

A: Yes, via GE EnerVista software, but hardware-dependent parameters (like I/O mapping or CT ratings) will flag a mismatch if the destination order code (-N-F-L-F-2-G-1-HI-P-6E) doesn’t match the source file’s hardware footprint.

Q: Does this relay require external control power to read event logs off the front panel?

A: Yes. The HI power supply requires 110–250 VDC or 110–230 VAC applied to the rear auxiliary terminals to power up the screen and control processor.

Q: Is the IEC 61850 protocol license included in this exact order code?

A: Yes. The 6E designation in the second communication port slot indicates dual RJ45 Ethernet equipped with IEC 61850 protocol capability enabled from the factory.

Q: What condition are your surplus GE units supplied in?

A: Units are bench-tested, bench-calibrated with secondary injection equipment, cleared of previous site configurations, and shipped in anti-static ESD packaging with new draw-out latch hardware.

Q: What warranty applies to this feeder relay?

A: Every unit comes backed by a standard 12-month full-replacement warranty covering hardware functionality, CT/VT sampling accuracy, and communication port performance.