9907-031
May 26, 2026

9907-031

Woodward 9907‑031 is a classic 2301A series digital speed‑load governor, designed for diesel engines, gas engines, steam turbines, gas turbines and generator sets. It realizes high‑precision speed regulation, parallel load sharing, overspeed protection and fault diagnosis for prime movers in power generation, petrochemical, oil‑gas and marine heavy‑duty industrial fields.

Description

Core Functions

  1. Dual control modes: isochronous mode for single‑unit constant‑speed operation; droop mode for multi‑unit genset parallel load sharing.

  2. PID closed‑loop regulation with startup ramp control, actuator stroke limit and load rejection protection.

  3. Built‑in overspeed monitoring, real‑time self‑diagnosis and relay alarm outputs.

  4. 4‑20 mA analog remote setpoint input for integration with DCS/PLC systems.

  5. Forward‑acting control logic for fuel actuator driving.

Electrical Specifications

  • Power Supply: 18–40 VDC (nominal 24 VDC)

  • Speed Input: Magnetic Pickup (MPU) sensor

  • Actuator Output: Proportional current output

  • Communication: RS‑485 Modbus‑RTU

  • Certification: CE certified, industrial anti‑interference

Environmental & Mechanical Features

  • Operating Temperature: −40 °C ~ +85 °C

  • Mounting: Panel‑mount installation

  • Enclosure: Rugged metal housing, dust‑proof and corrosion‑resistant

Typical Applications

  • Speed‑load control for engine and turbine generator sets

  • Petrochemical, oil‑gas compressor prime mover control

  • Marine auxiliary power generation systems

  • Industrial prime mover governing and safety protection systems


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