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UR8LH
The UR8LH is a single-slot pluggable CT/VT analog input module for GE Multilin UR universal protection relays. It provides 4 CT and 4 VT input channels, built for transmission and distribution line protection applications. This module samples secondary current and voltage signals from instrument transformers, feeding high-fidelity analog data to the UR relay for distance protection, line differential, metering and fault oscillography. It includes enhanced signal diagnostics to detect open CT/VT circuits and abnormal signal conditions. Galvanic isolation protects relay internal circuits from voltage transients and EMI. The module supports automatic CT shorting during removal for maintenance safety, and auto-recognition by UR relay firmware. We supply surplus original and fully tested refurbished UR8LH modules with worldwide shipping and pre-shipment functional testing.
H2: Key Features
H3: Core Advantages
- Single slot plug-in CT/VT module for GE Multilin UR relay chassis
- 4 CT + 4 VT channel configuration, optimized for line protection schemes
- Enhanced built-in diagnostics for open CT, open VT and signal integrity monitoring
- Galvanic isolation between field instrument transformers and relay backplane
- Automatic CT shorting mechanism when extracting module, prevents open CT hazard
- Auto-detected by UR firmware, simple retrofit and drop-in replacement
- Software-selectable CT secondary rating: 1A or 5A
- High precision true-RMS sampling for protection, metering and disturbance recording
H2: Technical Specifications
- Model: UR8LH
- Manufacturer: GE Multilin / GE Vernova
- Product Type: 4CT/4VT CT/VT Analog Input Module
- Compatibility: GE Multilin UR series universal protection relays
- Input Channels: 4 CT, 4 VT
- CT Secondary: Software selectable 1A / 5A
- Diagnostic: Open CT / open VT detection, signal health monitoring
- Operating Temperature: -40°C ~ +70°C
- Storage Temperature: -20°C ~ +85°C
- Humidity: 5%–95%, non-condensing
- Form Factor: Single slot plug-in module for UR chassis
- Safety: Automatic CT shorting on module withdrawal
H2: Applications
UR8LH CT/VT modules are widely deployed in power protection and automation projects:
- Transmission & sub-transmission line protection panels
- Line differential and distance protection schemes
- Utility substation feeder protection retrofits
- Power distribution system monitoring and metering
- Fault waveform capture and disturbance recording for UR relays
H2: Product Condition & Supply
We provide surplus original and fully tested refurbished UR8LH units. Every module undergoes complete functional inspection before ESD anti-static packing.
- Stock status: Please inquire for real-time stock availability
- Pre-shipment: Full function testing
- Packaging: Anti-static ESD packaging
- Shipping: DHL / FedEx / TNT global delivery
H2: FAQ
Q: What is UR8LH?
A: UR8LH is GE Multilin UR series 4CT/4VT CT/VT analog input module, designed for line protection relays to collect current and voltage signals from instrument transformers.
Q: What is the difference between UR8LH, UR8FV and UR8GH?
A: UR8LH = 4CT/4VT for transmission line protection; UR8FV = standard 3CT+1GCT+VT for feeder protection; UR8GH = optimized for sensitive ground fault / generator stator ground protection.
Q: Does UR8LH have open CT protection?
A: Yes, UR8LH automatically shorts CT circuits when pulled out from chassis, avoiding dangerous open secondary voltage during maintenance. It also has firmware diagnostics for open CT/VT detection.
Q: Are your UR8LH modules new?
A: We offer surplus original and fully tested refurbished UR8LH modules. Contact us to confirm available condition and stock.
Q: What about warranty?
A: Warranty is available for tested modules; the warranty period depends on product condition.
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