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TECHNICAL SPECIFICATIONS:
Part Number: IS220PTURH1A
Manufacturer: General Electric (GE)
Series: Mark VIe
Product Type: Turbine Protection I/O Pack
Processor Architecture: Dual ARM Cortex Processors
Communication Interface: Dual Redundant 100Base-TX Ethernet Ports
Speed Monitoring: 3 Pulse Rate / Speed Inputs (Passive or Active Pickup)
Speed Input Frequency Range: 2 Hz to 20,000 Hz
Speed Sensing Accuracy: 0.01% of Speed Reading
Trip Logic Interface: Overspeed & Emergency Trip Logic Execution
Flame Detection Inputs: Geiger-Müller or Optical Sensor Interface Support
Terminal Board Compatibility: TTURH1C, TTURH1D, TRPG, TREG, TRPL
Power Input: 28 V DC Nominal (Supplied via Terminal Board)
Power Consumption: 7.0 W Maximum
Conformal Coating: Yes
Operating Temperature: -30°C to +65°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 5% to 95% Non-Condensing
System Compatibility: GE Mark VIe Control System
Availability: In Stock
Repair Lead Time: 3–7 Days
Country of Origin: United States
Manual Reference: GEH-6721_Vol_II
The IS220PTURH1A is a Primary Trip Protection I/O Module designed and manufactured by General Electric as part of the Mark VIe Series used in Distributed turbine control systems. The Turbine Specific Primary Trip (PTURH1A) I/O pack provides the electrical interface between one or two I/O Ethernet networks and a turbine control terminal board. The PTURH1A contains a processor board common to the distributed I/O packs, a board specific to the turbine control function, and an analog acquisition daughterboard. The I/O pack plugs into the TTURH1C terminal board and handles four speed sensor inputs, bus and generator voltage inputs, shaft voltage and current signals, eight flame sensors, and outputs to the main breaker. Input to the pack is through dual RJ-45 Ethernet connectors and a three-pin power input. Output is through a DC-62 pin connector that connects directly to the associated terminal board connector. Indicator LEDs provide visual diagnostics.
As an alternative to TTURH1C, three PTURH1A I/O packs can be plugged directly into a TRPAH1A terminal board. This arrangement handles four speed inputs per PTUR, or alternately fans the first four inputs into all three PTURs. Two solid-state primary trip relays are provided by the TRPA. This arrangement does not support bus and generator voltage inputs, shaft voltage or current signals, flame sensors, or main breaker output. For simplex applications, the STUR terminal boards can be used.
INSTALLATION:
Mechanically secure the I/O pack(s) using the threaded studs adjacent to the Ethernet ports. The studs slide into a mounting bracket specific to the terminal board type. The bracket location should be adjusted such that there is no right-angle force applied to the DC-62 pin connector between the I/O pack and the terminal board. The adjustment should only be required once in the service life of the product.
The PTURH1A mounts directly to a TTUR, STUR, or TRPA terminal board. The TMR TTUR and TRPA have three DC-62 pin connectors for I/O packs. For simplex, either STUR or TTUR can be used.
Plug in one or two Ethernet cables depending on the system configuration. The I/O pack will operate over either port. If dual connections are used, the standard practice is to connect ENET1 to the network associated with the R controller.
Apply power to the I/O pack by plugging in the connector on the side of the I/O pack. It is not necessary to remove power from the cable before plugging it in because the I/O pack has inherent soft-start capability that controls current inrush on power application.
ANALOG INPUT HARDWARE:
In simplex applications, up to four pulse rate signals may be used to measure turbine speed. The PTUR I/O pack contains circuits to convert pulse rate inputs to digital speed. Generator and bus voltages are brought into PTUR for automatic synchronizing in conjunction with the turbine controller and GE excitation system. TTUR has permissive generator synchronizing relays and controls the main breaker relay coil 52G. Shaft voltage is picked up with brushes and monitored along with the current to the machine case. PTUR alarms high voltages and tests the integrity and continuity of the circuitry.
In TMR applications, there are separate sets of four speed inputs for each PTUR, R, S, and T. All other inputs fan to the three PTUR I/O packs. Control signals from R, S, and T are voted before they actuate permissive relays K25 and K25P. Relay K25A is controlled by the PPRO. All three relays have two normally open contacts in series with the breaker close coil.
SPEED PICKUPS:
An interface is provided for four passive, magnetic speed inputs with a frequency range of 2 to 20,000 Hz. Using passive pickups on a sixty-tooth wheel, circuit sensitivity allows detection of 2-RPM turning gear speed to determine if the turbine is stopped (zero speed). If automatic turning gear engagement is provided in the turbine control, this signal initiates turning gear operation.
Pulse rate inputs can be configured for a variety of applications. When using the configuration parameter PRType, flow type is used for flow divider fuel flow measurements. Speed type is used for normal single shaft turbines. Speed_High type provides an extended speed range above the standard speed type. Speed_LM type is designed for LM applications. Speed_HSNG type is used for applications where compensation for inconsistent tooth spacing on the speed wheel is desired. This pulse rate type will map the spacing of the teeth on the speed wheel to remove this periodic variation from speed measurements. Mapping locked status bits (HSNGn_Stat) are in signal space so that the mapping status of the algorithm can be observed.
WHY BUY FROM WOC
World of Controls keeps an extensive global stock of genuine OEM replacement components for GE Distributed Mark VIe turbine control systems. The PTURH1A Turbine Protection I/O Module is available in UNUSED surplus and fully REBUILT conditions, covered by complete warranty protection. Every unit undergoes comprehensive inspection and functional bench testing by experienced technical personnel to verify processing execution, pulse measurement accuracy, network communication stability, and signal isolation prior to shipment. We also offer fast repair and exchange options to support power plants in preventing downtime. Contact our sales team today to check live stock, request a quote, or arrange quick worldwide shipping.
What is the GE IS220PTURH1A?
The GE IS220PTURH1A is a Turbine Protection I/O Pack used in GE Mark VIe control systems. It processes turbine speed signals, flame detector inputs, and trip command logic, communicating digitized telemetry over dual-redundant Ethernet connections to central controllers.
What is the speed input frequency range of the PTURH1A?
The speed pickup interface supports a frequency range of approximately 2 Hz to 20,000 Hz. This wide range allows the module to monitor turbine shaft speed from very low turning-gear conditions through high-speed turbine operation. The actual application and configured pulse-rate type determine how the speed signal is processed.
Which terminal boards are compatible with the PTURH1A?
The PTURH1A can be used with compatible GE Mark VIe turbine terminal boards including TTURH1C, TTURH1D, TRPG, TREG, and TRPL configurations. The exact terminal-board arrangement depends on the turbine protection architecture and whether the system uses simplex or redundant configurations. Always verify the terminal-board part number before replacement.
What types of speed pickups can the PTURH1A interface with?
The PTURH1A provides interfaces for passive magnetic speed pickups and supports pulse-rate measurement over a broad frequency range. The input circuitry can detect very low turbine speeds when used with an appropriate toothed speed wheel. Configuration parameters determine how the pulse-rate signals are interpreted for different turbine applications.
Does the PTURH1A support flame detector inputs?
Yes. The PTURH1A turbine protection I/O pack can interface with supported flame detection devices, including Geiger-Müller and optical flame sensor arrangements. These inputs are processed as part of the turbine protection architecture when the associated terminal-board configuration supports them.
