GE Multilin | L90 | Line Current Differential System
The GE L90 is a line current differential system for GE platforms. Distance Protection: Supports complete distance protection and dual-breaker applications for single and three-pole tripping scenarios. | Synchronized Sampling: Uses synchronized sampling at each relay to mitigate communication channel issues. | Adaptive Restraint: Balances sensitivity for internal faults and security during external faults.. Factory-sealed, live-rack tested, 48-hour burn-in. 12-month warranty. Ships within 24h.
Technical Specifications
| General Electric Multilin L90 | is a high-end, cost-effective line current differential protection relay designed for transmission lines and cables at various voltage levels. Below are the key specifications: |
|---|---|
| High-Speed Protection | Provides high-speed current differential protection suitable for transmission lines and feeders. |
| Distance Protection | Supports complete distance protection and dual-breaker applications for single and three-pole tripping scenarios. |
| Synchronized Sampling | Uses synchronized sampling at each relay to mitigate communication channel issues. |
| Adaptive Restraint | Balances sensitivity for internal faults and security during external faults. |
| Inter-Relay Communication | Supports inter-relay protection communications via direct fiber and different interfaces. |
| Phase-Segregated Differential Protection | Ensures secure high-speed single-pole tripping. |
| Phase and Ground Distance Protection | High-speed phase and ground distance (5 zones) with independent compensation settings. |
| Sensitivity Enhancements | Increased sensitivity through dynamic charging current compensation and communication channel asymmetry compensation. |
| Synchrophasor Support | Phasor Measurement Unit (synchrophasor) support according to IEEE C37.118 (2011) and IEC 61850-90-5. |
| Ethernet Ports | Three independent fiber or copper Ethernet ports for simultaneous/dedicated network connections. |
| Time Synchronization | 1 microsecond time synchronization via LAN with IEEE 1588 support. |
| Cybersecurity | Advanced cybersecurity features (“CyberSentryTM”) for modern industry requirements. |
| IEC 61850 Compliance | IEC 61850 Ed. 1 and Ed. 2 certified implementation with flexible process bus support. |
| Versatile Use | Suitable for overhead lines (including series-compensated lines) and underground cables. |
| Three-Terminal Configurations | Suitable for three-terminal line configurations, wide area system monitoring, and control. |
| Secure Application | Secure application with Capacitively-Coupled Voltage Transformers (CCVTs). |
| Manufacturer | GE |
| Model / SKU | L90 |
Ships within 24 hours | 12-Month Warranty | Worldwide Delivery
The GE L90 is a line current differential system that serves as a critical component in GE automation systems. Whether you are replacing a failed unit, building a spare parts inventory, or sourcing for a planned system expansion, understanding the exact specifications of this module is essential to ensuring compatibility and reliable operation.
High-Speed Protection: Provides high-speed current differential protection suitable for transmission lines and feeders.. Synchronized Sampling: Uses synchronized sampling at each relay to mitigate communication channel issues.. Adaptive Restraint: Balances sensitivity for internal faults and security during external faults.. These are not generic specifications — they define how this specific module variant is configured and how it will behave in your system. GE uses suffix codes in part numbers to indicate configuration options such as voltage range, communication protocol, channel count, and certification status. Two modules with the same base number but different suffix codes can be completely incompatible.
Every module we ship undergoes functional verification on a live GE rack: power-up with correct backplane voltage, all channels exercised with calibrated signal sources, communication ports verified, and 48 hours of continuous operation at 55°C ambient to catch early-life failures. A printed test report with serial number, test date, technician ID, and all measured values accompanies every shipment. Genuine GE. 12-month warranty. Ships within 24 hours from Shenzhen via DHL, FedEx, or UPS.
What testing has been performed on this unit?
Visual inspection for physical damage or tampering. Power-up on a live {vendor} rack with correct backplane voltage. All channels exercised with calibrated signal sources (where applicable). Communication ports verified. 48 hours of continuous operation at 55°C ambient temperature. A printed test report with serial number, test date, and all measured values is included with every shipment.
How do I confirm this is the correct part for my system?
Match the full part number from the label on your existing module — not just the base model number, but every suffix character. The suffix codes define critical configuration options. If you are unsure, send us a clear photo of the existing module label. Our engineers will cross-reference the part number and confirm compatibility, typically within 4 business hours.
What warranty and shipping options are available?
12-month comprehensive warranty covering component failure under normal operating conditions. Advance replacement available for critical applications — we ship the replacement before receiving the returned unit. Standard shipping: DHL Express, FedEx Priority, or UPS Worldwide Express. Handling time: within 24 hours of confirmed payment. Typical delivery: 3-5 business days worldwide. Customs documentation included.
Compatible Parts — Same System
These modules share the same system family as the multilin-l90-LINE. Commonly ordered together for complete rack builds or spare parts kits.
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