Description
1. Product Overview
The Woodward 8440‑2085 is a generator‑set intelligent paralleling controller of the easYgen‑3500XT‑P1 series, a core control unit specially designed for industrial diesel/gas generator‑sets. Developed for automatic start‑stop, speed & voltage regulation, paralleling operation and fault protection of generator units, it integrates functions including parameter measurement, logic control, interlock protection and communication‑based operation & maintenance. It adapts to operation modes such as standalone unit operation, multi‑generator paralleling and mains transfer. Featuring high measurement accuracy, outstanding operational stability, programmable logic and superior industrial anti‑interference performance, it is widely deployed in power plants, industrial & mining sites, oil‑gas facilities and critical standby power‑supply scenarios, serving as the core device for automatic control and safety protection of generator‑sets.
2. Core Functions
High‑precision Full‑parameter Monitoring: Supports measurement for multiple generator winding connection configurations, including 3‑phase 3‑wire, 3‑phase 4‑wire, 1‑phase 2‑wire and 1‑phase 3‑wire. It accurately collects key operating parameters such as unit voltage, frequency and current, and is compatible with 50/60 Hz power‑frequency conditions.
Automatic Generator‑set Control: Integrates start‑stop control, speed regulation and voltage stabilization functions. It supports manual‑automatic dual‑mode switching, and enables unattended automatic operation including auto‑start upon mains failure and auto‑shutdown upon mains restoration.
Multi‑unit Paralleling & Grid Connection: Equipped with complete logics for synchronous paralleling, load sharing and parallel operation. It achieves synchronous parallel‑running of multiple generators and automatically distributes active and reactive loads to ensure stable and balanced grid‑connected power supply.
Comprehensive Fault‑protection Interlock: Built‑in multi‑layer protection logics against over‑voltage, under‑voltage, over‑frequency, under‑frequency, overload, overspeed, short‑circuit and other faults. It monitors abnormal unit conditions in real‑time and triggers alarms and shutdown interlocks automatically to prevent unit damage and power‑supply accidents.
Programmable Logic Configuration: Allows customization of control logics, delay parameters and interlock rules to satisfy process requirements of different working conditions, and flexibly adapts to standby power generation, peak‑shaving generation, continuous power generation and other operation modes.
- Intelligent Communication and O&M: Supports industrial bus communication, enabling connection with upper monitoring systems, PLCs and industrial control platforms to realize remote parameter monitoring, fault tracing, data logging and firmware upgrade for convenient daily operation and condition management.
3. Technical Specifications
| Parameter Item | Technical Specification |
|---|---|
| Model | 8440‑2085 |
| Product Series | easYgen‑3500XT‑P1 |
| Device Type | Generator‑set Paralleling Controller |
| Measured Frequency Range | 40Hz～85Hz (Standard 50/60Hz) |
| Voltage Setting Range | 50V～650000V AC |
| Applicable Winding Types | 3P‑3W, 3P‑4W, 1P‑2W, 1P‑3W |
| Maximum Power Consumption per Channel | ＜0.15W |
| Operating Temperature | -20℃～+70℃ |
| Unit Weight | Approx. 2268 g |
| Core Features | High‑precision measurement, programmable logic, paralleling load sharing, multi‑fault protection |
| Operation Modes | Standalone operation, multi‑unit parallel operation, redundant mains standby |
4. Working Principle
The Woodward 8440‑2085 controller adopts a fully‑automatic closed‑loop workflow of acquisition & monitoring → logic computation → regulation output → protection interlock. After power‑on, it continuously collects real‑time data of generator voltage, frequency, speed, current and mains grid parameters. Its high‑precision computing unit compares measured values with preset thresholds and paralleling parameters, and dynamically adjusts unit speed and excitation voltage to maintain stable voltage and frequency output.
Under grid‑connected conditions, the controller precisely matches phase, frequency and voltage to achieve shock‑free synchronous paralleling, and evenly distributes loads among parallel generators so as to avoid overload or unbalanced loading on individual units. With its built‑in programmable logic, the system continuously evaluates equipment operating status. Once electrical or mechanical anomalies are detected, alarms, load shedding and shutdown interlock actions are triggered immediately to contain fault escalation. All runtime data and fault records are uploaded to upper systems, forming a complete closed‑loop for automatic monitoring and intelligent maintenance.
5. System Architecture Compatibility
As an all‑in‑one dedicated control unit for generator‑sets, this controller is compatible with various industrial diesel‑driven and gas‑fired generator power systems. It can be directly interfaced with unit actuators, excitation devices, speed governors, circuit breakers and other field equipment without extra adapter modules.
On the communication side, it supports standard industrial bus protocols and can seamlessly integrate with PLC, DCS and upper‑level monitoring platforms for remote networking, centralized management and data archiving. Its hardware design fits standard industrial power supply and wiring topologies. It supports standalone single‑unit control and multi‑generator parallel network expansion. It offers high compatibility for retrofitting and replacement of existing units without extensive modification of original control circuits and logics.
6. Application Scenarios
This product is deployed primarily in industrial power‑generation and standby‑power applications demanding high stability, continuity and safety of power supply. In the power sector, it is used for unit control and grid‑connection of small‑to‑medium‑size self‑owned power stations and emergency standby power plants. In the oil, gas and chemical industries, it controls standby generator‑sets and process‑critical power supplies at oilfields and refineries, safeguarding uninterrupted continuous chemical production.
It is also widely applied in standby power‑supply systems for industrial‑mining facilities, data centers, rail transit, water‑treatment plants and large‑scale commercial complexes. It undertakes key functions including start‑stop regulation, grid‑connected power supply, load distribution and fault interlock protection, and acts as a core control device for industrial standby power and distributed generation systems.
