GE UR8HH Multilin UR Control Module with 3-1A/5A Phase CTS 1A/5A Ground CTS and CT/VT Input Scaling

The UR‑8HH (also referred to as UR8HH or UR‑8HH) is an add-on module designed for the UR series of protection and control relays from GE Multilin (Universal Relay platform). It functions as a CT (current transformer) / VT (voltage transformer) input module, or more broadly, as a control interface module, allowing a UR relay to receive and scale analog signals from CTs and VTs.

• Modular design: Expands the capabilities of UR relays by adding CT/VT input modules such as the UR‑8HH. Modularity is a core feature of the UR relay platform.
• CT/VT input scaling: Supports 1 A or 5 A CTs for both phase and ground currents, ensuring accurate measurement of electrical parameters in power systems.

• In substation protection systems, the UR‑8HH connects to CTs and VTs on feeders, transformers, or busbars.
• For transformer protection applications, it supplies the necessary scaled current and voltage signals for the relay's protection algorithms to operate correctly.

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