ALSTOM NRD108031 TRVC070999000 BOTTOM

Core Technical Specifications & Performance Parameters

1. Rack Installation Position: Bottom fixed mounting layer of Alstom TRVC standard turbine control rack, matched with NRD series upper I/O functional modules
2. Integrated Signal Terminal Channels: Total 64 groups of screw locking wiring terminals, divided into 4 independent signal areas: analog input signal terminals, analog output signal terminals, digital DI switch input terminals, digital DO relay output terminals
3. Internal Bus Connection Mode: Thick copper conductive busbars integrated inside the baseplate, realizing electrical connection between all wiring terminals and the upper-layer I/O module rear edge connectors
4. Signal Filter Circuit Parameters: Each signal channel equipped with RC low-pass anti-interference filter, filter cut-off frequency fixed at 1.2 kHz to suppress high-frequency electromagnetic noise generated by turbine high-power excitation equipment
5. Surge Protection Performance: Each channel integrated gas discharge tube lightning surge protection component, maximum withstand surge voltage of 2.5 kV 8/20μs lightning impulse waveform
6. Operating Power Supply Range: 24 V DC industrial control power supply, input voltage fluctuation tolerance range of 21.6 V DC ~ 31.2 V DC
7. Physical Dimensions: 482.6 mm width (standard 19-inch rack width) × 133 mm height × 210 mm depth, dedicated bottom-layer height size matched with TRVC rack internal slide rail
8. Net Weight: 4.2 kg, integrated heavy copper busbars and metal shielding structural components
9. Environmental Rating Parameters
   • Continuous operating ambient temperature: -10℃ ~ +60℃
   • Relative humidity range for operation and storage: 10%RH ~ 90%RH non-condensing
   • Shock resistance: 20 g half-sine pulse impact for 11 ms; vibration resistance: 3 g RMS random vibration from 5 Hz to 500 Hz
   • Protection grade: IP20 for front panel, only suitable for installation inside fully sealed turbine control electrical cabinets

Function & Feature Highlights

1. Specialized bottom-layer integrated terminal baseplate design for Alstom TRVC turbine control racks, centralizing all on-site turbine field signal wiring points to realize unified wiring management, greatly simplifying on-site wiring construction and later equipment maintenance and troubleshooting work
2. Four independent partitioned signal wiring areas with physical isolation baffles between different signal types, realizing spatial separation of analog weak current signals and digital strong current signals to eliminate cross-channel electromagnetic crosstalk interference inside the rack
3. Each signal channel integrates independent RC low-pass noise filter and gas discharge tube lightning surge protection component; all field signals complete anti-interference filtering and overvoltage surge protection processing on this bottom baseplate before entering upper control modules, effectively reducing the fault damage rate of expensive upper-layer turbine control I/O modules caused by on-site lightning strikes and grid voltage surges
4. Thick solid copper internal conductive busbars with full gold-plated surface anti-oxidation treatment; stable low-resistance electrical connection between all wiring terminals and upper I/O modules, avoiding signal measurement drift and control action failure caused by contact resistance increase after long-term rack operation
5. Standard 19-inch rack fixed installation structure matched with Alstom TRVC series turbine control system dedicated electrical cabinets; multiple sets of NRD series bottom baseplates can be installed in parallel on the same rack to expand the total number of field signal wiring channels according to the actual I/O quantity of different power plant turbine units
6. Front panel equipped with clear silk-screen printed channel number labels, signal type identification marks and wiring sequence standard diagrams; maintenance personnel can quickly find the corresponding channel terminal according to the turbine control system wiring drawing without repeated disassembly and inspection of internal rack components