Product Short Description
The GE WESDAC D20 PS is a high-reliability, substation-grade power supply module purpose-built to power the WESDAC D20/D200 series substation controllers and associated I/O modules. It delivers regulated, isolated DC power from a wide-range AC input, ensuring stable and clean power for critical automation and protection systems in harsh electrical environments. Engineered for mission-critical applications, it integrates advanced surge suppression, harmonic filtering, and comprehensive circuit protection to withstand voltage fluctuations, transients, and extreme ambient conditions.
Description
Technical Specifications
- Input Voltage: 85 V AC to 264 V AC (single-phase, universal input)
- Input Frequency: 47 Hz to 63 Hz
- Inrush Current: ≤50 A at 25°C, rated input
- Output Voltage: 24 V DC (adjustable 22 V DC to 26 V DC)
- Output Current: 10 A, 20 A, or 30 A (model-dependent)
- Output Ripple & Noise: ≤100 mVp-p (full load)
- Load Regulation: ≤±0.5% (0% to 100% load)
- Efficiency: ≥85% at full load
- Operating Temperature: -20°C to +70°C (-4°F to +158°F)
- Storage Temperature: -40°C to +85°C (-40°F to +185°F)
- Humidity: 5% to 95% (non-condensing)
- Altitude: Up to 3,000 m (9,843 ft)
- Protection Features: Overvoltage, overcurrent, short-circuit, overtemperature, surge suppression
- Cooling: Intelligent variable-speed fan + heatsink (temperature-controlled)
- MTBF: >100,000 hours (industrial grade)
- Dimensions (H×W×D): 233 mm × 160 mm × 40 mm (9.2 in × 6.3 in × 1.6 in)
- Weight: 1.2 kg (2.6 lbs)
- Compliance: CE marked; IEC 61000-6-2 (industrial EMC); UL 508
Key Features
- Wide-Range Universal AC Input: Accepts global AC voltages (85–264 V AC) for worldwide deployment without hardware changes.
- Precision Regulated 24 V DC Output: Adjustable 22–26 V DC with tight regulation and low ripple for sensitive control electronics.
- Substation-Grade Reliability: Withstands electrical transients, voltage spikes, and harsh environmental conditions common in power utility substations.
- Intelligent Thermal Management: Variable-speed fan adjusts cooling based on temperature, reducing noise and extending fan life.
- Comprehensive Protection Suite: Overvoltage, overcurrent, short-circuit (hiccup-mode auto-recovery), and overtemperature protection safeguard the power supply and connected loads.
- LED Status Indication: Dedicated LEDs for input power, output status, and fault conditions enable at-a-glance monitoring and quick troubleshooting.
- Remote Monitoring & Communication: Supports RS485 Modbus RTU for remote monitoring of voltage, current, temperature, and fault logs; enables remote configuration and alarm management.
- Hot-Swap Capability: Supports hot-swap installation and removal in compatible D20 chassis for maintenance without system shutdown.
- Power Factor Correction (PFC): Active PFC minimizes harmonic distortion and improves energy efficiency, reducing impact on the utility grid.
- Sealed & Rugged Construction: Industrial-grade components and reinforced packaging resist vibration, dust, and moisture for long-term durability.
Application Scenarios
- Power Utility Substations: Primary power source for D20/D200 substation controllers, I/O modules, and protection relays in transmission and distribution substations.
- Electrical Distribution Automation: Deployed in feeder automation, capacitor bank control, and recloser control systems for real-time monitoring and control.
- Renewable Energy Plants: Used in solar, wind, and hydroelectric power facilities to power control systems, data loggers, and grid interface equipment.
- Oil & Gas Industry: Applied in upstream (drilling), midstream (pipelines), and downstream (refineries) for control system power in hazardous and remote locations.
- Process Control Plants: Deployed in chemical, petrochemical, and water treatment plants to power critical PLCs, SCADA nodes, and analytical instruments.
- Railway & Transportation: Used in railway signaling, traction power control, and wayside monitoring systems for reliable DC power in outdoor environments.
- Legacy System Upgrades: Replaces obsolete power supplies in aging D20-based systems, extending service life while maintaining full compatibility.
Functional Overview
The WESDAC D20 PS functions as the primary power backbone for the GE WESDAC D20 substation automation system. It converts wide-range AC input to isolated, regulated 24 V DC, powering the D20 controller and up to 30 A of combined I/O load. The active PFC and harmonic filtering ensure clean power quality, while the intelligent cooling system optimizes thermal performance. Integrated protection circuits prevent damage from electrical faults, and Modbus communication enables remote management. Its rugged design and wide environmental tolerance make it suitable for 24/7 operation in the most demanding industrial and utility environments.
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