UR-8FH

About the UR-8FH

General Electric Multilin’s UR-8FH is a CT/VT module designed for installation in the Universal Relays series. It provides the relay with 3-1A/5A phase current transformers, 1A/5A ground current transformers, and four voltage transformer terminals. Current transformers and voltage transformers are capable of scaling down current and voltages to manageable levels for relay monitoring and control, and are necessary for producing vital data for the relay.

The CT/VT module can employ voltage or contact inputs on channels one through four inclusive or channels five through eight inclusive. The UR manuals provide further information on proper relay connections, indicating important particulars such as how channels one and five are intended for connection to phase A, channels two and six are intended for connection to phase B, etc. The manuals also supply integral warnings and notices to the user, like how connections made to the relay terminals for nominal current of 1 A or 5 A must match the secondary rating of the connected CTs, lest the user desires to incur system damage. In summary, it is important for users to carefully peruse the Universal Relay manuals before beginning the process of making relay connections.