GE UR8HH CT/VT High‑Sensitivity Analog Input Module

Description

Technical Specifications

Electrical Specifications

• Product Type: High‑Sensitivity CT/VT Analog Input Module
• Series: GE Multilin UR Series Universal Relays
• Input Configuration:
  • 3 × phase current channels (1 A / 5 A nominal)
  • 1 × high‑sensitivity residual / ground current channel
  • 4 × voltage channels (line‑to‑line or line‑to‑neutral)
• Nominal Frequency: 50 Hz / 60 Hz (operating range 45–65 Hz)
• Measurement Accuracy: ±0.1% for current and voltage channels
• Sensitivity: Ultra‑low threshold detection for high‑sensitivity earth‑fault protection
• Isolation: 2500 VDC full galvanic isolation between field inputs and relay logic
• Sampling Rate: High‑speed synchronous sampling for accurate waveform capture
• Input Burden: Ultra‑low burden to preserve CT/VT signal integrity
• Power Supply: 24 VDC (provided by UR relay chassis)
• Software Compatibility: Fully configurable via GE EnerVista UR software suite
• Certifications: IEC 60947‑2, ANSI, IEEE, UL/cUL, CE, CSA compliant

Physical & Environmental Specifications

• Dimensions: 150 mm × 180 mm × 40 mm
• Weight: 1.16 kg (2.5 lb)
• Mounting: Plug‑in chassis mounting for UR‑series relay racks
• Operating Temperature: -40°C to +70°C (-40°F to +158°F)
• Storage Temperature: -55°C to +85°C (-67°F to +185°F)
• Relative Humidity: 0–95% RH (non‑condensing)
• Ingress Protection: IP20 (enclosed chassis installation)
• Pollution Degree: 3 (heavy industrial environment)
• Vibration Resistance: 5g RMS (10–500 Hz)
• Shock Resistance: 15g (20 ms half‑sine wave)

Key Features

• Ultra‑High Sensitivity: Detects extremely low‑level residual and ground currents for sensitive earth‑fault protection.
• High‑Accuracy Measurement: Delivers ±0.1% precision for metering, power quality, and high‑performance protection.
• Full Galvanic Isolation: Protects relay core from field transients, ground loops, and electrical interference.
• Ultra‑Low Input Burden: Minimizes loading on connected CTs and VTs to maintain signal fidelity.
• High‑Speed Sampling: Captures fast transient events for accurate fault detection and waveform recording.
• Plug‑and‑Play Integration: Direct compatibility with all UR‑series relays for seamless system expansion.
• Hot‑Swappable Design: Supports module replacement without system shutdown to reduce downtime.
• LED Status Indicators: Front‑panel LEDs for channel health and module status for quick field diagnostics.
• EnerVista Software Support: Full configuration, calibration, and diagnostics via GE’s professional platform.
• Industrial‑Grade Durability: Rugged construction for stable operation in extreme temperatures and high‑vibration environments.

Application Scenarios

• Transmission & Distribution Substations: Sensitive earth‑fault and high‑impedance fault protection for feeders and cables.
• Power Generation Plants: Generator stator ground‑fault protection and auxiliary system monitoring.
• Industrial Power Distribution: High‑sensitivity protection for motors, drives, and critical low‑current loads.
• Oil & Gas Facilities: Ground‑fault protection for drilling rigs, pumping stations, and remote power systems.
• Mining Operations: Underground cable and distribution protection in harsh mining environments.
• Water & Wastewater Treatment: Pump station and treatment plant sensitive earth‑fault protection.
• Data Centers: Critical power distribution and UPS system high‑resolution monitoring.
• Marine & Offshore Installations: Vessel and platform electrical system sensitive fault detection.
• Renewable Energy Systems: Wind turbine and solar farm grid interconnection high‑sensitivity protection.
• Heavy Manufacturing: Steel, cement, and chemical plant low‑level fault detection and protection.