Overview
The GE Multilin UR-6FH, also cataloged as the UR-6FH Digital I/O Module, operates as a dedicated hardware component for fast output contact execution within GE Multilin Universal Relay (UR) platforms. It provides eight Form-C output contacts for protection logic signaling, tripping, interlocking, and control sequence operations.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | UR-6FH |
| Brand | GE Multilin |
| Origin | Canada |
| Module Type | Digital I/O Module |
| Product Function | 8 Fast Form-C Output Contacts |
| Compatible Platform | GE Multilin Universal Relay Series |
| Output Channels | 8 |
| Contact Configuration | Form-C (SPDT) |
| Contact Rating | 10 A continuous current |
| Make and Carry Current | 30 A for 0.2 seconds |
| Operation Speed | Less than 4 ms or less than 8 ms depending on voltage and configuration |
| Breaking Capacity | 0.5 A at 125 VDC (L/R = 40 ms); 0.3 A at 250 VDC (L/R = 40 ms); 10 A at 250 VAC resistive |
| Isolation | 2 kV AC isolation to chassis and other modules |
| Operating Temp | Not specified by manufacturer |
| Power Consumption | Backplane supplied; value depends on UR system configuration |
Backplane Bus Communication and I/O Density Scaling
The GE Multilin UR-6FH integrates with the UR platform backplane interface to execute relay output commands generated by protection and control logic. The module increases I/O density scaling by adding eight independent fast Form-C contact outputs without changing the main relay processor configuration.
Furthermore, the module supports rapid contact actuation for applications requiring short electrical response paths. The Form-C configuration provides common, normally-open, and normally-closed terminals, allowing flexible external circuit arrangements for trip circuits, alarms, and control outputs.
Frequently Asked Questions
Q: Can the UR-6FH operate as a standalone output device without a GE Multilin UR relay chassis?
A: No. The UR-6FH requires installation inside a compatible GE Multilin Universal Relay chassis and communicates through the internal backplane interface.
Q: What contact configuration does the UR-6FH provide?
A: The module provides eight Form-C (SPDT) output contacts. Each contact includes common, normally-open, and normally-closed terminals.
Q: Is the UR-6FH suitable for direct high-energy breaker trip circuits?
A: The module provides rated output contacts for relay control circuits. Final trip circuit design must consider external protection devices, wiring requirements, and system voltage conditions.
Field Installation Guidelines
- Install the UR-6FH only in the designated slot locations of a compatible GE Multilin UR chassis.
- Verify relay configuration settings before enabling output logic assignments.
- Use properly rated external wiring based on contact voltage and current requirements.
- Separate output wiring from high-noise power conductors to reduce electromagnetic interference.
- Connect cable shields according to the substation grounding design and maintain consistent grounding practices.
- Confirm Form-C contact terminal assignments before connecting trip, alarm, or control circuits.
- Check module seating and backplane engagement after installation to maintain stable internal communication.
