Woodward 2301E‑ST 8273‑1014 Load‑Sharing and Speed Controller
Product Overview
The Woodward 2301E‑ST 8273‑1014 is a microprocessor‑based digital load‑sharing and speed controller specially developed by Woodward for single‑valve small‑size steam turbines. It integrates complete control algorithms for turbine start‑stop sequencing, speed regulation, unit protection and power balancing, and is applicable for steam‑turbine‑driven generators, water pumps and compressors.
Equipped with an onboard generator power acquisition circuit and native load‑sharing capability, the 2301E‑ST 8273‑1014 delivers a cost‑effective control solution for small steam turbine‑generator sets. It serves as a direct drop‑in replacement for legacy 2301A controllers and supports on‑site custom function configuration via software. The controller complies with API‑611 industrial steam turbine standards. Model 8273‑1014 is designed for installation inside standard electrical cabinets in non‑hazardous locations, while an explosion‑proof Class I Division 2 variant is available for chemical industry hazardous‑area applications.
Technical Specifications
Physical Dimensions and Weight
Non‑hazardous‑location model (8273‑1014): 387.85 × 158.50 × 50.8 mm, weight 1.75 kgHazardous‑location explosion‑proof model: 390.5 × 254 × 66 mm, weight 1.75 kg
Mounting method: Cabinet mounting in any orientation. Terminal layout is compatible with the 2301A series; no modification to cabinet cutouts is required for retrofitting.
Environmental Parameters
Operating temperature: ‑40℃ ~ +70℃Storage temperature: ‑40℃ ~ +105℃Vibration resistance: Complies with MIL‑STD 810C Method 516.2Ingress protection: Reinforced metal sheet‑metal enclosure with single‑PCB integrated design.
Electrical Parameters
Power supply: 18‑36 VDC; steady‑state current 0.43 A, peak current 7 A (100 ms); rated power consumption ＜20 W.
Speed sensing input (MPU pick‑up sensor): 100‑24950 Hz, corresponding to 90‑32000 rpm; input voltage 1.7‑35 Vac. Dual‑channel speed input meets API‑611 requirements.
Power acquisition circuit: Three‑phase PT voltage input 90‑240 Vac; three‑phase CT current input 0‑7.2 A.
Actuator drive output: Supports two current specifications: 4‑20 mA / 20‑200 mA.
Analog channels: 2 configurable analog inputs, 1 configurable analog output (4‑20 mA signal).
Digital channels: 8 isolated digital inputs; 4 solid‑state relay drive outputs (external 24 VDC, max. 200 mA per channel).
Communication Interfaces
J1 Debug port: RS232 for connection with Control Assistant commissioning software.J2 Communication port: Full‑duplex RS422 Modbus RTU; baud rate 9600‑115200 bps.
Synchronizer matching signal: ±2.5 VDC bipolar signal, compatible with DSLC‑2, SPM‑A and SPM‑D synchronizing devices.
Functional Advantages
The Woodward 2301E-ST 8273-1014 supports fully customizable steam turbine start-stop control. It offers manual, semi-automatic and automatic operation modes with adjustable valve ramp curves for smooth startup and shutdown.
Built-in overspeed protection, watchdog monitoring and fault alarms ensure safe and stable turbine operation in industrial scenarios.
This controller provides dual regulation modes for diverse operating conditions. The isochronous mode stabilizes frequency for island power systems, while droop control accurately manages generator load for grid parallel operation.
Integrated PT/CT power sampling realizes precise kW droop regulation and real-time load monitoring for single-valve steam turbines.
It supports multi-unit parallel load sharing with legacy Woodward 2301A controllers. Soft load up/down functions eliminate grid impact and reduce equipment wear during paralleling.
Automatic critical speed avoidance quickly crosses turbine resonant ranges. It effectively reduces rotor vibration and blade fatigue damage to extend service life.
Configurable analog inputs support remote speed and load setpoints with adjustable ramp rates. The independent PID loop stabilizes pressure, flow and other process parameters.
Remote start-stop is available via dry contact and Modbus signals. RS422 Modbus RTU enables seamless DCS and PLC connection for real-time data monitoring.
The RS232 debug port matches Control Assistant software for parameter configuration, waveform recording and fault log export. It holds global certifications including EMC, ATEX, CSA, ABS, CCS and DNV for industrial and marine applications.
Product Characteristics
Featuring a compact single-PCB reinforced metal structure, it is a direct drop-in replacement for 2301A controllers. No cabinet modification is needed, lowering renovation costs significantly.
All core functions support full software configuration. Users can enable critical speed avoidance, PID regulation and remote control functions via software without hardware changes.
Dual redundant MPU speed inputs comply with API-611 standards. Single-channel fault tolerance avoids unexpected unit shutdowns.
It adapts to 4~20mA and 20~200mA actuators, compatible with most single-valve steam turbine driving mechanisms.
Built-in self-diagnosis and watchdog protection monitor I/O, speed and power circuits in real time. It outputs alarm signals and uploads fault codes for rapid maintenance.
Two structural versions are available: standard type for ordinary workshops and explosion-proof type for oil and chemical hazardous areas.
Application Fields
Ideal for small single-valve steam turbine generator sets in captive power, waste heat and biomass power plants, as well as CHP systems.
Suitable for speed and load control of steam turbine-driven industrial compressors and process water pumps.
Widely used for marine auxiliary turbo generator control and factory waste heat recovery power systems.
Supports distributed energy island operation and grid-tied turbine unit control. The explosion-proof model fits petrochemical and oilfield hazardous working environments.
FAQ
Q1: Can Woodward 2301E‑ST 8273‑1014 directly replace legacy 2301A controllers?A1: Yes. Terminal layout and cabinet cutout dimensions are fully compatible with 2301A. No hardware modification is required. Complete replacement is achieved by importing steam‑turbine‑specific parameters via Control Assistant software, and it works seamlessly with the existing analog load‑sharing bus.
Q2: How many steam turbines can realize parallel load sharing with 2301E‑ST 8273‑1014?A2: There is no hardware quantity limit. Units are networked through the analog load‑sharing bus. Stable multi‑turbine parallel operation can be realized with DSLC‑2 synchronizer, and soft‑loading function prevents paralleling impact.
Q3: Is Woodward OEM actuator mandatory for 2301E‑ST?A3: No. Any compliant actuator with drive current of 4‑20 mA or 20‑200 mA can connect to the output channels. Qualified third‑party actuators are fully supported.
Q4: Are there functional hardware differences between standard 2301E‑ST 8273‑1014 and the explosion‑proof variant?A4: Control algorithms, I/O channels and communication functions are identical. Only enclosure structure and explosion‑proof certifications differ. 8273‑1014 is for general indoor cabinets, while the explosion‑proof version applies to Class I Division 2 hazardous locations in chemical and oil‑gas industries.
Q5: What read‑write functions are available via Modbus on 2301E‑ST?A5: It supports remote reading and writing of turbine speed, generator active load, analog values, digital input/output status. Remote start‑stop commands and remote setpoint modification are available; fault and alarm codes can also be retrieved.
Recommended 2301‑Series Part Numbers
8272 Series 2301A Analog Load‑Sharing Speed Controller8273‑138 2301D‑EC Digital Load‑Sharing Speed Controller (Non‑hazardous Location)8273‑139 2301D‑EC Digital Load‑Sharing Speed Controller (Explosion‑proof Location)8273‑140 2301D Digital Load‑Sharing Speed Controller (Non‑hazardous Location)8273‑141 2301D Digital Load‑Sharing Speed Controller (Explosion‑proof Location)8273‑1011 2301E Digital Governor for Internal Combustion Engines (Non‑hazardous Location)8273‑1012 2301E Digital Governor for Internal Combustion Engines (Explosion‑proof Location)8273‑1014 2301E‑ST Steam Turbine Load‑Sharing Speed Controller (Non‑hazardous Location)8273‑1013 2301E‑ST Steam Turbine Load‑Sharing Speed Controller (Explosion‑proof Location)DSLC‑2 Digital Synchronizing & Load ControllerSPM‑A Mini Synchronizing ModuleSPM‑D10 Three‑phase Digital SynchronizerMSLC‑2 Master Synchronizing & Load ControllerEGCP‑2 Generator Set Comprehensive ControllerEGCP‑3 High‑power Generator Set Comprehensive Protection Controller
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