The GE IS220PSFDH1A serves as a specialized high-voltage power source for industrial flame detection systems. This module belongs to the EX2100 and Mark VI turbine control families. It converts low-voltage DC input into a regulated high-voltage output for sensor excitation. Because it uses a rugged design, it excels in demanding power generation environments. The unit provides critical energy to maintain the safety and monitoring of gas turbine flames.
Technical Specifications
| Characteristic | Specification |
| Brand | General Electric (GE) |
| Model Number | IS220PSFDH1A |
| Input Voltage | 28 VDC (26.6 – 29.4 VDC Range) |
| Output Voltage | 335 VDC (±5% Tolerance) |
| Output Capacity | Supports up to 8 Flame Detectors |
| Current Limit | 7 mA |
| Isolation | 1700 VDC |
| Operating Temperature | -30°C to 65°C |
| Cooling | Natural Convection |
Triple Modular Redundancy and Safety
This power supply utilizes a diode-ORed configuration to support Triple Modular Redundant (TMR) architectures. This setup ensures the system remains active even if two power units fail. Furthermore, the 1700V DC isolation barrier protects the control network from high-voltage surges. Integrated over-voltage protection and filtered inputs reduce electromagnetic interference effectively. These features guarantee continuous operation for critical turbine protection circuits.
Advanced Hardware Features
The IS220PSFDH1A features a conformal-coated printed circuit board to resist environmental contaminants. It includes three front-facing LEDs for immediate diagnostic feedback on module health. Additionally, the built-in soft-start circuitry limits inrush current to 550mA during startup. This prevents electrical stress on the primary 28V DC supply line. The compact housing allows for efficient mounting without the need for external cooling fans.
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