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GE UR6MH UR-6MH Universal Relay Chassis Module

The GE Multilin UR6MH, also cataloged as the UR6MH Universal Relay Chassis Module, operates as a dedicated hardware component for modular protection relay assembly within the GE Multilin Universal Relay (UR) platform.

Hardware Specifications

Parameter	Specification
Model	UR6MH
Brand	GE Grid Solutions / GE Multilin
Operating Temp	-40 deg C to +60 deg C
Power Consumption	Dependent on installed UR modules
Product Series	Universal Relay (UR) Family
Chassis Configuration	6-Slot Horizontal Frame
Mounting Style	19-Inch Rack Mount / Surface Panel Mount
Storage Temperature	-40 deg C to +85 deg C
Ambient Humidity	5% to 95% non-condensing
Ingress Protection Rating	IP40 front panel, IP20 rear terminals
Dielectric Withstand	2.0 kV RMS for 1 minute (IEC 60255-5)
Vibration / Shock Compliance	IEC 60255-21-1 / IEC 60255-21-2

Profinet / EtherNet-IP Deterministic Network and Backplane Communication

The UR6MH provides the mechanical chassis and internal backplane structure for GE Multilin Universal Relay configurations. The 6-slot horizontal frame supports installation of CPU modules, power supply units, CT/VT sampling assemblies, communication interfaces, and digital I/O modules.

The internal backplane enables module-to-module data exchange and supports deterministic communication paths between processing, measurement, and control components. The chassis architecture allows I/O density scaling by adding compatible UR family modules while maintaining a standardized relay hardware arrangement.

Frequently Asked Questions

Q: Does the UR6MH operate as an independent protection relay processor?
A: No. The UR6MH is a chassis assembly unit. Protection logic execution requires compatible GE Multilin UR processor and application modules installed within the chassis.

Q: What is the hot-swap limitation of the UR6MH chassis?
A: Hot-swap capability depends on the installed UR modules and system configuration. Module removal or insertion should follow GE Multilin service procedures and applicable operating requirements.

Q: What determines the backplane current load of the UR6MH?
A: The backplane load is determined by the installed combination of CPU, power supply, communication, CT/VT, and I/O modules.

Field Installation Guidelines

Install the UR6MH in a suitable control cabinet or relay panel using the specified rack or surface mounting arrangement. Maintain proper clearance for front access and rear terminal wiring.

Use shielded wiring practices for signal connections where required by the installed relay modules. Cable routing should separate low-level measurement wiring from high-current power conductors to reduce electromagnetic interference.

Verify chassis grounding, panel bonding, and protective earth connections before energizing the installed relay assembly. Confirm that all inserted modules are correctly seated in the backplane connectors and that unused slots are protected according to site maintenance procedures.

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