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UR8GH  Universal Relays series 

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.

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Description

Overview

Essential details：UR8GH  Universal Relays series 

UR-8FH Technical Specifications

Dimensions approx. 15cmL, 18cmW, 4cmH
Manufacturer General Electric Multilin
Manufacturing Location Markham, Ontario, Canada
Weight 2lb, 9oz

Product Description

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.

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Does the UR-8FH have the ability to protect against ground fault situations when incorporated into the GE Multilin system of universal relays?
The UR-8FH is the CT/VT described as having the standard 4CT/4VT. It does not have the sensitive ground feature, which allows the universal relay to be protected on grounded systems that are classified as high-impedance. The modules that have this feature are the UR-8G, UR-8J, UR-8M, and UR-8R order codes. These mentions are of the newer CT/VT generation. There are two older CT/VT modules (UR-8B and UR-8D) which also have the sensitive ground fault protection capability. The standard models with the 4CT/4VT feature for example does have the typical up to 24 analog current transformer and voltage transformer capacity as described of all the CT/VT modules incorporated into the various universal relays. In addition to the CT/VT modules, the universal relays also have a transducer I/O module. This provides the UR with either DCmA cards or RTDs to monitor flow, wind speed, temperature, vibration, or pressure. Analog outputs can also be used to connect the UR to an external PLC or other user interface devices. The universal relays also have a digital I/O module that contains up to 96 contact inputs and up to 64 contact outputs.

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