GE IS220PPRAH1A Emergency Turbine Protection Module

Function: Emergency Turbine Overspeed Protection I/O Module

Power Supply: 24 V DC nominal

Power Consumption: ≤ 15 W

16 Speed Pickup (PU) Inputs (0–5 V DC)

2 Transducer Inputs

Pressure Wave Frequency: 1.5 Hz

Communication: IONet Ethernet (100 Mbps)

Operating Temperature: –30 °C to +65 °C

Humidity: 5–95% RH (non-condensing)

Hazardous Area Certification: Class I, Division 2 (when mounted on IS200TREAH1A or IS200WREAH1A)

Emergency Overspeed Protection: Independent hardware-based logic for critical turbine trip backup

PROTECT-SPD Logic Engine: Specialized firmware for overspeed detection and rapid actuation

High-Speed Ethernet Interface: IONet (100 Mbps) for integration into GE Mark VIe networks

Redundant Design Compatibility: Works in concert with PTUR packs in TMR (Triple Modular Redundancy) configurations

Hot-Swappable Module: Facilitates maintenance without downtime

Conformal-Coated Electronics: Protects against harsh environmental conditions

Hazardous Area Use: Suitable for deployment in explosive environments and offshore installations

In the Khoms GT13E1 gas turbine upgrade project, the PPRAH1A module is the secondary backup of the triple-mode redundant TMR protection system, and the unit availability has been increased to more than 98%. Edwardsport

The 798 MW integrated coal gasification combined cycle unit uses IS220PPRAH1A, which works with the SPRO/TREA terminal board to achieve high-speed protection trip response of 10,000+ I/O points. Marafiq 

Continuous operation for 15+ years with zero unplanned downtime, the IS220PPRAH1A module provides reliable hardware backup overspeed and out-of-step protection to ensure the safe operation of key turbines.