The GE Multilin F35, part of the Universal Relay (UR) family, is a sophisticated, microprocessor-based device designed for the comprehensive protection, control, and monitoring of multiple feeders. The specific configuration F35-G-03-B-L-H-F-8L-H-6A-M-XX-P-XX represents a high-spec variant of this modular platform. Engineered by GE Grid Solutions, the F35 is a cost-effective solution that can manage up to six feeders within a single chassis, making it ideal for high-density substations where space and integrated automation are primary concerns.

Technical Description & Parameters

The F35 utilizes a modular “Plug-and-Play” architecture, allowing for field-upgradable hardware and firmware.

• Model Series: Multilin F35 (Multiple Feeder Management)
• Order Code: F35-G-03-B-L-H-F-8L-H-6A-M-XX-P-XX
• Protection Elements: Timed and Instantaneous Overcurrent (Phase, Neutral, Ground), Sensitive Ground Fault, Over/Under Voltage, and Frequency protection.
• Monitoring: High-accuracy metering (Current, Voltage, Power, Energy) and Data Logger/Oscillography.
• Communication: Supports IEC 61850, Modbus TCP/IP, DNP 3.0, and Ethernet/IP.
• I/O Capacity: High-density digital inputs and relay outputs (Specific to the “8L” and “6A” codes in the string).
• Power Supply: High-range auxiliary power (typically 110-250V DC or 110-230V AC).
• Display: Advanced front-panel HMI with programmable pushbuttons and status LEDs.

 

Product Technical Description

The F35 is built on the UR (Universal Relay) platform, which features a deterministic multi-processor architecture. This ensures that protection functions are never compromised by communication or metering tasks. The “G” in the order code typically specifies the CPU/Processor type, while subsequent characters define the Power Supply, Digital I/O, and Transducer modules. It supports sophisticated “FlexLogic,” a powerful graphical programming tool that allows users to create custom protection and control schemes (such as automatic bus transfer or load shedding) without external PLCs.

 

Product Datasheet Essentials

This relay features integrated “CyberSentry” security, providing AAA (Authentication, Authorization, and Accounting) and encrypted communications to meet NERC/CIP compliance requirements. It includes high-resolution oscillography (up to 64 samples per cycle) for detailed post-fault analysis. The F35’s modular design means that if a single I/O card fails, it can be replaced without replacing the entire relay, significantly reducing Life Cycle Costs (LCC). The unit is housed in a standard 19-inch rack-mount chassis (4U height).

 

Country of Origin

Canada (GE Multilin / Markham, Ontario)

 

Application Fields

The F35 is a versatile management tool used in:

• Distribution Substations: Protecting multiple radial or looped feeders from a single point.
• Industrial Power Systems: Managing power distribution in refineries, mines, and manufacturing plants.
• Renewable Energy: Aggregating and protecting multiple wind turbine or solar inverter strings.
• Data Centers: Critical feeder management and high-speed power transfer logic.

 

Product Usage Instructions

1. Mounting: Install the F35 chassis in a standard 19″ relay rack. Ensure the grounding lug is connected to the station ground bus using a low-impedance conductor.
2. Wiring: Connect CT (Current Transformer) and VT (Voltage Transformer) secondaries to the designated rear terminals. Verify that the polarity is consistent across all feeders to ensure correct directional and power measurements.
3. Programming: Connect a PC to the front RS232 port or rear Ethernet port and use the EnerVista UR Setup software to configure the protection settings and FlexLogic.
4. Commissioning: Perform “Secondary Injection Testing” for each feeder. Use a relay test set to verify that the F35 trips within the specified time curves for each protection element.
5. Integration: Configure the IEC 61850 GOOSE messaging or DNP3 mapping to integrate the relay into the station SCADA system.

 

Common Questions & Answers (Q&A)

Q: How many feeders can the F35 manage simultaneously? A: Depending on the hardware configuration, a single F35 can provide full protection and control for up to six independent feeders.

Q: What is the benefit of the “Universal Relay” (UR) platform? A: The UR platform uses common hardware modules across different relay types (F35, B30, L90, etc.). This reduces the number of spare parts a utility needs to stock and simplifies technician training.

Q: Can I upgrade the communication protocol after installation? A: Yes. Because the F35 is modular, you can update the firmware or swap the communication module to support new protocols like IEC 61850 without replacing the whole unit.

 

Explore More Feeder Protection Solutions

For technical support and to source the F35 / F35TG3BLHF8LH6AMXXPXX along with other GE Multilin UR series spare parts, visit our online technical catalog.

 

Recommended Similar Models

1. F60 – A dedicated Feeder Management Relay with enhanced synchrocheck and breaker control.
2. F35-H – A different hardware configuration of the F35 with specialized transducer inputs.
3. L90 – A UR series Line Current Differential Relay for transmission line protection.
4. B30 – A UR series Bus Differential Relay for protecting substation busbars.
5. G60 – A UR series Generator Protection Relay often used in the same lineups.