ALSTOM IR139‑1 Overspeed Protection Module

Technical Specifications

Model：IR139‑1

Brand：ALSTOM

Product Type：Dual‑channel overspeed protection module

Applicable System：ALSTOM 3300‑50 protection rack,steam turbine ETS emergency trip system

Supply Voltage：24V DC ±10% backplane power supply

Speed Input：2‑channel magnetic pickup sensor input

Speed Measuring Range：0‑10000 RPM configurable

Relay Output：4‑channel SPDT relay,2 safety forced‑guide trip outputs

Safety Level：SIL2 compliant under corresponding system architecture,API 670 standard compliant

Communication Interface：Rack backplane internal system bus

Status Indicator：Multi‑color LED for power,speed status,overspeed alarm and module fault

Built‑in Function：Rotational speed measurement,overspeed threshold judgment,safety trip output,fault self‑diagnosis

Working Temperature：0℃ ~ +60℃

Storage Temperature：‑20℃ ~ +70℃

Protection Class：IP20

Mounting：Plug‑in slot installation inside control rack

Weight：0.55kg

Product Brief:

IR139‑1 is legacy plug‑in dual‑channel overspeed protection module for ALSTOM 3300‑50 protection rack,core safety component of steam turbine ETS system. It receives pulse signals from two independent magnetic pickup speed probes,real‑time measures turbine rotational speed and compares with configurable overspeed threshold. When overspeed condition is detected,the module drives forced‑guide safety relay to output trip command for turbine emergency shutdown. Dual‑channel hardware design improves anti‑interference capability and avoids false trip risk. It transmits operating status and fault information through rack backplane bus. Front‑panel LED indicators support quick on‑site fault diagnosis without extra testing tools. This is EOL discontinued spare part,widely used for thermal power plant turbine protection system maintenance and renovation. Please confirm hardware revision and rack compatibility before purchase. Strict ESD anti‑static protection shall be performed during installation.