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GE Multilin UR9NV UR-9NV Universal Relay Module

The GE Multilin UR9NV, also cataloged as the UR9NV Universal Relay Module, operates as a dedicated hardware component for electrical protection, control, and monitoring within GE Multilin Universal Relay (UR) Series platforms.

Hardware Specifications

Parameter	Specification
Model	UR9NV
Brand	GE Multilin
Origin	General Electric Multilin
Operating Temp	-40 deg C to +60 deg C
Power Consumption	Not specified in available documentation
Product Line	GE Multilin Universal Relay (UR) Series
System Architecture	Modular microprocessor-based protection and control platform
Power Supply Voltage	88-300 VDC / 88-264 VAC or 24-48 VDC option dependent
CT / VT Inputs	1 A / 5 A CT secondary inputs; 100-240 V AC VT inputs
Analog I/O	Configurable 4-20 mA or 0-10 V DC inputs and outputs
Digital I/O	Optically isolated digital inputs; Form-A/Form-C latching and solid-state output relays
Communication Interfaces	Dual Ethernet 10/100Base-T RJ45 or 100Base-FX fiber; RS485 / RS232 serial ports
Communication Protocols	IEC 61850 Ed. 1/2, DNP 3.0, Modbus RTU/TCP, IEC 60870-5-104, IEEE 1588 PTP
Sampling Capability	Up to 128 samples per cycle
Metering Accuracy	Class 0.2 / 0.5
Protection Rating	IP54 front panel when panel mounted
Enclosure Type	Heavy-duty metal chassis with drawout module construction

Profinet / EtherNet/IP Deterministic Network and Firmware Compatibility

The GE Multilin UR9NV uses the modular UR hardware architecture with processor-based execution, configurable I/O expansion, and communication interface integration. The platform supports deterministic substation communication through IEC 61850 Ethernet networking, allowing synchronized exchange of protection, control, and monitoring data.

The modular construction supports hardware configuration scaling through interchangeable power supply modules, CPU boards, CT/VT input modules, and digital or analog I/O assemblies. Firmware flash compatibility is maintained through approved UR platform software packages, allowing controlled lifecycle management of relay functions and communication features.

Frequently Asked Questions

Q: Does the UR9NV support hot-swap replacement of internal modules?
A: The UR9NV uses a drawout module construction for maintenance access. Module replacement procedures must follow GE Multilin service instructions and system de-energization requirements.

Q: What type of electrical isolation is provided for field signals?
A: The unit provides optically isolated digital inputs and supports isolated CT/VT measurement interfaces according to the installed hardware configuration.

Q: Which communication protocols are supported by the relay platform?
A: The UR9NV supports IEC 61850, DNP 3.0, Modbus RTU/TCP, IEC 60870-5-104, and IEEE 1588 PTP communication functions.

Field Installation Guidelines

Install the UR9NV in a compatible panel or rack enclosure with appropriate mechanical support for the metal chassis assembly. Maintain separation between high-voltage CT/VT wiring, low-level analog signals, and communication cables to reduce electrical interference.

Terminate cable shields according to site grounding practices. Use twisted shielded wiring for analog signal connections where required, and route Ethernet or serial communication cables separately from high-current conductors.

Verify the installed power supply option before energization. Confirm CT polarity, VT phase connections, digital input voltage levels, and output relay wiring before placing the protection system into service.

Follow approved configuration procedures for firmware loading, protection settings, communication addressing, and IEC 61850 network integration.

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