I. Product Overview

8440-2168 belongs to the Woodward SPM-D/ProTech-GII platform. It is an original product from the United States and integrates automatic synchronous grid connection of the generator + three-channel TMR overspeed protection. It is suitable for steam turbines / gas turbines and diesel generator sets, and is equipped with 2301A and MicroNet speed control systems. It is a mainstream spare part for power station renovations and has SIL2 safety level certification.

Related models: 8440-2165 (standard version), 8440-2166 (process temperature control version), 8440-2168 (high-end extended I/O version).

 Electrical Parameters Table

Project Specifications

Power Supply DC 18～32V (standard 24VDC, dual redundant power input)

Speed Measurement Input 3 independent MPU electromagnetic / Hall speed sensors, 0.5Hz～25000Hz full range

Voltage Sampling Three-phase 100/120/230VAC bus + generator terminal voltage, true RMS acquisition

Protection Logic Three-out-of-two (2oo3) overspeed voting protection, one-out-of-two conventional shutdown interlock

Communication RS485 Modbus-RTU + Ethernet Modbus-TCP

Environment -20℃～+70℃, cabinet rail installation, protection IP20

Weight Approximately 2.5kg

Two Core Functions

1. SPM-D Automatic Synchronous Parallel (Grid Connection)

Automatically match voltage, frequency, and phase, precisely issue closing command, impact-free grid connection; output 4～20mA speed adjustment bias signal, link the speed regulator for fine-tuning of the unit speed, multi-unit parallel operation cooperating with the 9907 series load distribution board to evenly distribute active power.

2. ProTech-GII Triple Redundancy Overspeed Protection

Three independent speed sampling, three-out-of-two voting to prevent maloperation, when overspeed occurs, hard contact relay trips, avoiding runaway accidents, is the key safety protection unit for the unit.

Applicable Industries

Self-owned power plants, refining and chemical / oilfield gas turbine, ship power station, hydropower station unit renovation and replacement.