Description

The Westinghouse 1C31129G03 is a high-efficiency, DC-input redundant power supply module engineered for Emerson’s Ovation™ distributed control system (DCS), inheriting Westinghouse Electric’s legacy of industrial robustness. Designed for applications requiring battery-backed or uninterruptible power, this module converts 24V DC input into precisely regulated +5V DC, +12V DC, and -12V DC outputs to energize critical control racks in safety-focused environments. Its N+1 parallel redundancy architecture and hot-swap capability ensure zero downtime during power source transitions, maintenance, or grid instability. The Westinghouse 1C31129G03 features active current-sharing technology (±2% balance accuracy) and multi-stage transient protection, safeguarding sensitive controllers and I/O modules against voltage spikes and ripple. Conformal-coated circuitry provides immunity to humidity and conductive dust, while IEEE 344 seismic certification enables deployment in nuclear and high-vibration settings. Backward-compatible with Westinghouse WDPF II systems, this module bridges legacy infrastructure with modern operational resilience, making it indispensable for SIL 2/SIL 3 safety loops where power continuity is non-negotiable.

WESTINGHOUSE 1C31129G03

Technical Specifications

Main Features and Advantages

Battery-Backed Resilience: Optimized for 24V DC input from batteries or UPS systems, the Westinghouse 1C31129G03 ensures uninterrupted operation during AC grid failures. Wide input tolerance (18-36V DC) accommodates battery discharge curves without shutdown.

Ultra-Precise Power Conditioning: Multi-stage filtering and <1>

Intelligent Load Management: Patented current-sharing technology ensures equal power distribution across parallel units (±2% deviation), eliminating derating requirements. Integrated OR-ing diodes enable seamless failover during source switching.

Extreme Environment Readiness: Conformal coating (IPC-CC-830B) protects against humidity, salt fog, and H₂S corrosion. Dual fans with dust-resistant impellers maintain thermal stability at 70°C ambient. -40°C cold-start capability suits arctic deployments.

Advanced Diagnostics: Real-time monitoring of input sag/surge events, output ripple (<75mV>

Application Field

The Westinghouse 1C31129G03 excels in critical infrastructure where power loss risks catastrophic outcomes:

Nuclear Power: Seismic-qualified (IEEE 344) backup power for reactor protection systems and safety-grade controllers.

Offshore Oil & Gas: Battery-backed operation of subsea ESD valves and F&G detection on unmanned platforms.

Grid Stability: Powers black-start generator controllers and grid-synchronization systems during network collapse.

Water/Wastewater: Feeds critical SCADA systems controlling floodgates and chemical dosing during storms.

Mining: Dust-immune power for underground conveyor safety interlocks and gas monitoring networks.

Transportation: Backbone for tunnel ventilation controls and railway signaling safety systems with UPS integration.

Related Products

1C31129G01: Legacy 24V DC-input model (40A output)

1C31129G02: Enhanced diagnostics variant with communication port

1B30001H01: Battery Charger Unit (paired with DC-input systems)

1C31194G01: Power Distribution Panel with busbar interface

5X00070G01: Ovation Controller Module (primary load)

1C31203G01: Redundant Fan Tray Assembly

Ovation BRC400: Battery Rack Cabinet for large-scale backup

1C31122G01: AC-input power supply for hybrid configurations

WESTINGHOUSE 1C31129G03

Installation and Maintenance

Pre-installation preparation: Verify battery bank capacity (minimum 150Ah for 1-hour backup). Use 6 AWG copper wiring for DC input (torque terminals to 0.9 N·m). Confirm chassis grounding <0>

Maintenance recommendations: Monthly capacity testing of backup batteries. Quarterly cleaning of fan filters in ISO 14644-1 Class 8 environments. Annual infrared scan of busbar connections. Replace fans preventatively at 60,000 hours. Validate output ripple (<100mV>