Product Details
Product Description
The GE Multilin L90 is a high‑performance line current differential protection relay developed by General Electric for transmission lines and cables across multiple voltage levels. It is engineered to deliver fast, secure, and reliable protection, combining advanced differential and distance protection functions with modern communication capabilities.
This relay supports synchronized sampling, adaptive restraint, and inter‑relay communication, ensuring dependable operation even under challenging network conditions. With integrated synchrophasor support and compliance with IEEE C37.118 and IEC 61850‑90‑5 standards, the GE Multilin L90 is suitable for utilities and industrial power systems requiring precise fault detection and system stability.
Technical Specifications
-
Model / Order Number: L90
-
Manufacturer: General Electric (GE Multilin)
-
Type: Line Current Differential Protection Relay
-
Protection Functions:
-
High‑speed current differential protection for transmission lines and feeders
-
Distance protection with 5 zones (phase and ground)
-
Dual‑breaker applications with single and three‑pole tripping
-
Adaptive restraint for internal vs. external fault discrimination
-
Communication Features:
-
Synchronized sampling across relays
-
Inter‑relay communication via fiber and multiple interfaces
-
Synchrophasor (PMU) support per IEEE C37.118 (2011) and IEC 61850‑90‑5
-
Sensitivity Enhancements:
-
Dynamic charging current compensation
-
Communication channel asymmetry compensation
-
Design: Phase‑segregated differential protection for secure high‑speed tripping
Application Scenarios
-
Transmission line protection in utility networks
-
Cable protection across varying voltage levels
-
Dual‑breaker configurations requiring single or three‑pole tripping
-
Power system monitoring with synchrophasor integration
FAQ
Q: What type of protection does the GE Multilin L90 provide? A: It offers line current differential protection, distance protection, and synchrophasor support.
Q: Can the relay handle dual‑breaker applications? A: Yes, it supports both single and three‑pole tripping scenarios.
Q: How does the relay maintain sensitivity during external faults? A: Through adaptive restraint and dynamic compensation features.
Q: Does the L90 support synchrophasor measurements? A: Yes, it complies with IEEE C37.118 and IEC 61850‑90‑5 standards.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
Understanding VFD Mechanical Brake Logic and Control in Industrial Automation
Variable Frequency Drives (VFDs) play a crucial role in modern industrial automation by controlling motor speed, torque, and acceleration. However, high-inertia loads and vertical lifting systems require precise mechanical braking logic to ensure operational safety and prevent equipment damage.
Why Programmable Logic Controllers Drop into Stop Mode: An Expert Analysis
Industrial automation systems rely heavily on Programmable Logic Controllers (PLCs) to maintain uninterrupted production. When a PLC unexpectedly shifts from Run to Stop mode, whole manufacturing lines stall.
As control systems evolve across modern factory automation, understanding the root causes of these interruptions helps engineers minimize costly downtime. This technical guide breaks down why PLCs trip into Stop mode and provides practical strategies to mitigate system faults.
Understanding Root Causes of Unplanned PLC Stop Mode in Industrial Automation
Modern Programmable Logic Controllers manage execution through distinct operational states: Run, Stop, Start-Up, and Hold. During power-up, a controller initializes memory registers within Stop mode before briefly transitioning to Start-Up mode. During this phase, internal self-diagnostics evaluate system integrity across hardware and user programs. If the controller detects no critical faults, it enters Run mode to execute the control program continuously. However, any severe system anomaly forces the CPU back into Stop mode immediately to prevent erratic machine behavior across the plant floor.