The GE Multilin N60 is a world-class Network Stability and Synchrophasor relay part of the Universal Relay (UR) family. Specifically designed for wide-area monitoring and control, the N60 provides advanced network stability functions, including load shedding, out-of-step tripping, and frequency shedding. As a high-performance Phasor Measurement Unit (PMU), it enables real-time monitoring of power system dynamics, helping utilities prevent large-scale blackouts and manage grid stability in the face of fluctuating renewable energy and complex interconnections.

Product Datasheet & Technical Specifications

The N60 (Model N60J17HLHF8NH6PM8LPXXU8LWXX) is a highly customized, modular IED:

• Series: Universal Relay (UR) N60
• Function: Network Stability and Synchrophasor Measurement (PMU)
• PMU Standards: Fully compliant with IEEE C37.118 (for both M and P classes)
• CPU/Memory: High-speed processor with enhanced memory for long-term data logging
• Communication: Multiple Ethernet ports (Fiber/Copper) supporting IEC 61850 Edition 2, MMS, and GOOSE
• Voltage/Current Inputs: High-precision CT/VT modules (Standard 1A/5A and wide range V)
• Cyber Security: Hardware-based protection with secure boot and encrypted communication
• Redundancy: Supports PRP and HSR protocols for seamless network recovery

 

Country of Origin

This advanced grid protection relay is manufactured in Canada (Markham, Ontario), at GE Grid Solutions’ global center of excellence for protection and control technology.

 

Application Fields

The N60 is deployed in the most critical layers of the electrical grid:

• Wide-Area Monitoring (WAMS): Providing real-time synchrophasor data to regional dispatch centers.
• Special Protection Schemes (SPS/RAS): Executing complex logic for load shedding or generator rejection during grid instability.
• Transmission Grids: Detecting and mitigating out-of-step (pole slip) conditions in high-voltage interconnections.
• Microgrid Integration: Managing frequency and voltage stability during islanding transitions.
• Inter-Area Oscillations: Monitoring and damping low-frequency oscillations between large interconnected power regions.

 

Product Instructions & Technical Notes

When commissioning the GE Multilin N60, it is essential to use the UR Setup (EnerVista) software to configure the PMU parameters, ensuring the GPS/IRIG-B time synchronization source is locked and accurate for timestamped data. The “J” in the model code typically indicates the 1.0 version of the N60 hardware/firmware base. Given the complexity of the 23-character model string, verify that the module slots (identified by the PM, 8L, and LW codes) are correctly seated in the chassis before power-up. For network stability functions, utilize the integrated FlexLogic™ engine to create custom protection curves that match your utility’s specific shedding requirements.

 

Q&A – Frequently Asked Questions

Q1: What is the primary benefit of the Synchrophasor (PMU) capability? A: It provides a high-speed, GPS-timestamped snapshot of the power system’s state, allowing operators to see phase angle differences across hundreds of miles, which is critical for predicting instability.

Q2: Does the N60 support IEC 61850? A: Yes, the N60 is a native IEC 61850 device, supporting advanced peer-to-peer GOOSE messaging for high-speed control between different manufacturer relays in the same substation.

Q3: Can this relay replace a standard frequency relay? A: Absolutely. While it is much more powerful, it includes comprehensive under/over frequency and rate-of-change of frequency (ROCOF) protection as part of its core stability features.

Q4: How do I handle a “Clock Not Synced” alarm? A: Check your GPS clock source and the IRIG-B or PTP (Precision Time Protocol) wiring. Synchrophasor data is invalid without sub-microsecond time synchronization.

 

Similar Model Recommendations

1. GE Multilin L90 (Line Differential Protection)
2. GE Multilin D60 (Distance Protection)
3. GE Multilin C90Plus (Bay Controller and Logic Processor)
4. SEL-487E (Alternative Transformer/Station Protection)
5. Siemens SIPROTEC 7SX800 (Modern stability relay equivalent)