The GE Multilin SR750-P5-G5-S5-HI-A20-G is a high-performance, microprocessor-based hardware component designed for the comprehensive digital protection, automated command control, and algorithmic monitoring of medium- to large-scale electrical distribution feeders within utility and heavy industrial substations.
Hardware Specifications
Parameter
Specification
Model Number
SR750-P5-G5-S5-HI-A20-G (also referenced as 750-P5-G5-S5-HI-A20-G-E)
Brand
GE Multilin / General Electric
Series
Multilin 750 / 760 Protection Platform
Origin
Canada
Weight
14.00 lbs (6.35 kg) nominal
Dimensions
252 mm x 216 mm x 224 mm (9.92" x 8.50" x 8.82")
Form Factor
Draw-out case construction optimized for panel/rack environments
Operating Temperature
-40 deg C to +70 deg C (-40 deg F to +158 deg F)
HI Power Supply Range
High-voltage auxiliary input range (supports standard station DC batteries or AC lines)
Analog Interfaces
Eight (8) 4–20 mA isolated DC analog outputs
Time Synchronization
Integrated IRIG-B hardware port for coordinated clock linking
Industrial Control and Networks
Backplane Bus Communication Velocity: The relay engine utilizes a dedicated high-speed internal parallel bus structure to transfer instantaneous current and voltage waveforms from physical input modules to the processing core. Tripping equations compute within millisecond windows, executing high-speed output contacts rapidly to isolate faulted feeder zones before the transient overcurrent propagates into upstream switchgear.
I/O Density Scaling: The integrated layout merges three-phase CT inputs, ground fault CT connections, potential transformer (PT) links, and programmable output contacts into a single high-density draw-out frame. This single-slot panel layout eliminates multiple discrete protective induction disks, drastically dropping physical terminal strip wireway density.
Firmware Flash Compatibility: Core inverse-time protective curves, FlexLogic equations, Modbus registers, and communication node profiles are maintained in non-volatile flash memory sectors. The local hardware firmware version must correlate completely with the active EnerVista 750 configuration software baseline to prevent parameter upload locks or data truncation during settings downloads.
