GE Multilin UR Series | UR 8FH/UR-8FH | CT/VT Module

Overview  

The GE UR8FH module is a dedicated CT/VT (Current Transformer/Voltage Transformer) unit designed for integration into the Multilin Universal Relay (UR) series. It provides precise current and voltage scaling for relay monitoring and control, ensuring accurate measurement and reliable system protection.

Technical Specifications

• Manufacturer: General Electric Multilin

• Manufacturing Location: Markham, Ontario, Canada

• Model: UR8FH

• Type: CT/VT Module

• Weight: 2 lb 9 oz (approx. 1.17 kg)

• Dimensions: 15 cm (L) × 18 cm (W) × 4 cm (H)

Key Features

• Current Transformers (CT):

• Three phase CTs supporting 1 A / 5 A inputs

• Dedicated ground CT supporting 1 A / 5 A inputs

• Voltage Transformers (VT):

• Four VT input terminals

• Scales down voltage and current for safe relay monitoring and control

• Channel Configuration:

• Channels 1 and 5: Phase A

• Channels 2 and 6: Phase B

• Channels 3 and 7: Phase C

• Channels 4 and 8: Ground or neutral reference

• Safety and Installation:

• Nominal current rating (1 A or 5 A) must match the CT secondary rating

• Incorrect installation may result in equipment damage

Applications

• Power system monitoring and protection

• Relay-based current and voltage measurement

• Industrial automation requiring CT/VT scaling

• Expansion of UR relay functionality for advanced grid control

FAQ

• Q: What is the maximum current rating supported?  A: The module supports CT inputs rated at 1 A or 5 A, depending on the connected transformer.

• Q: Can the UR8FH be used with both CT and VT simultaneously?  A: Yes, the module is designed to handle both current and voltage transformer inputs for comprehensive relay monitoring.

• Q: How should installation be performed?  A: Follow the UR series manuals carefully, ensuring CT secondary ratings match the module’s nominal input rating.