The GE Multilin L30, also cataloged as the L30 Line Current Differential Protection Relay, operates as a dedicated hardware component for sub-transmission and medium-voltage line protection within electrical power distribution grids. This modular Urion-platform device executes high-speed fault detection, dynamic charging current compensation, and three-pole tripping sequences to isolate overhead lines and underground cables during power system fault conditions.
Hardware Specifications
Parameter
Specification
Model
L30
Brand
GE Multilin (General Electric)
Series
UR (Universal Relay) Series
Origin
Canada / United States
Weight
Standard UR series horizontal 19-inch rack-mount profile
Dimensions
4U standard chassis envelope configuration
Operating Temp
Standard substation environmental limits
Power Consumption
Sourced via internal UR modular power supply options
Application Scheme
Three-pole tripping and three-terminal line configurations
Current Transformer Limits
Adaptive restraint characteristics for CT saturation immunity
Network Interfaces
Direct fiber, RS422, G.703, IEEE C37.94, and 10/100/1000M Ethernet
Integrated full-color display with bay mimic and graphical phasor visualization
Industrial Control and Ethernet Network Connectivity
The protection relay implements advanced IEC 61850 process bus communication velocities, supporting deterministic data exchanges over station and process bus networks. High-density I/O routing scales dynamically, allowing the device to process sampled values from remote Merging Units via IEC 61850-9-2LE or Hardfiber protocols.
