Description
The 8440-1713 D is a highly specialized synchronizer and load control module manufactured by Woodward, a global leader in precision control systems for power generation and industrial machinery. This module is a key component within Woodward’s esteemed 8440 series, specifically designed to provide advanced automatic synchronization and load management functions for generator sets. The primary function of the Woodward 8440-1713 D is to precisely match the voltage, frequency, and phase angle of an incoming generator to a running bus (either another generator or the utility grid) and then initiate a breaker closure at the exact moment of synchronization, followed by accurate load control. This process, known as “synchronizing,” is critical for preventing catastrophic damage to generators and electrical systems that can occur from improper connections.
Engineered for reliability and precision in demanding power generation applications, the Woodward 8440-1713 D delivers immense value by automating a complex and high-risk operational procedure. Its sophisticated algorithms ensure a smooth and seamless transition of a generator onto a live bus, minimizing mechanical stress on the prime mover and electrical stress on the generator. The intrinsic value of this module lies in its ability to enhance system reliability, protect valuable assets from damage due to out-of-sync closures, and enable fully automated power generation sequences for prime power, standby, and peak-shaving applications. It is an indispensable component for any multi-generator facility or plant requiring parallel operation with the utility grid.

8440-1713 D WOODWARD
Technical Specifications
| Parameter Name | Parameter Value |
| Product Model | 8440-1713 D |
| Manufacturer | Woodward |
| Product Type | Generator Synchronizer and Load Control Module |
| Input Signals | Generator & Bus Voltage (V), Frequency (Hz), Phase Angle |
| Voltage Range | Typically 90-140 VAC line-to-neutral (via VTs) |
| Frequency Range | Typically 45-65 Hz |
| Synchronizing Accuracy | Typically ±2° phase angle, ±0.1 Hz frequency, ±3% voltage |
| Outputs | Relay closure for breaker close command, raise/lower signals to governor and voltage regulator |
| Communication Interface | RS-232/485 for configuration and monitoring (using Woodward ToolKit software) |
| Operating Voltage | 18-36 VDC (Nominal 24 VDC) or 90-140 VAC |
| Operating Temperature | -40°C to +70°C (-40°F to +158°F) |
| Mounting | Designed for panel or DIN rail mounting |
Main Features and Advantages
The Woodward 8440-1713 D is distinguished by its advanced synchronization algorithms and robust design. A core feature is its adaptive sync technology, which calculates the precise point of phase coincidence and predicts the exact time to initiate a breaker closure command, accounting for the inherent mechanical delay in the breaker itself. This ensures a “dead-on” sync every time, preventing the damaging torques and current surges associated with out-of-phase closures. The module provides comprehensive adjustable setpoints for sync parameters, including maximum slip frequency, phase angle limits, and voltage differential limits, allowing it to be finely tuned to the specific characteristics of the generator and circuit breaker it controls.
A paramount advantage of this module is its integrated load control functionality. Once synchronization is complete, the Woodward 8440-1713 D can seamlessly transition to managing the generator’s real power (kW) load, either by maintaining an isochronous base load or by implementing a droop function for proportional load sharing in a multi-generator system. Its ruggedized construction is designed to withstand the electrical noise, voltage transients, and temperature fluctuations present in power generation switchgear and control panels. The module’s clear LED status indicators provide immediate visual feedback on its operating mode (e.g., SYNC, LOCK, LOAD CONTROL) and any active alarms, making operator interaction and troubleshooting intuitive and efficient.
Application Field
The Woodward 8440-1713 D is deployed in a wide array of power generation applications where reliable and automatic synchronization is a critical operational requirement. In prime power applications, such as independent power plants (IPPs) and microgrids, it is used to seamlessly parallel multiple generator sets to meet a variable electrical load, ensuring stable and efficient plant operation. For emergency and standby power systems in critical facilities like hospitals, data centers, and industrial plants, this synchronizer enables automatic generator start-up, synchronization to the emergency bus, and load pickup upon a utility power failure.
Furthermore, this module is essential in peak-shaving and demand response applications, where generators are brought online to reduce electricity costs during periods of high utility rates. It is also found in marine applications for synchronizing shipboard generators and in the oil & gas industry on drilling rigs and production platforms. In all these fields, the Woodward 8440-1713 D provides the critical intelligence to automate complex switching operations, enhance electrical system stability, and protect expensive generator assets from the severe consequences of a faulty synchronization.

8440-1713 D WOODWARD
Related Products
8440-1712 D / 8440-1714 D: Other synchronizer models within the same 8440 series, often with variations in specific features, firmware, or hardware revisions.
Woodward 2301A Speed Control: The electronic governor that receives “raise/lower” speed commands from the 8440-1713 D to adjust engine RPM for frequency matching.
Woodward SPM-A Synchronizer: A dedicated synchronizer module that represents another product line for similar applications.
ProAct™ Digital Protection Modules: Protection relays (e.g., 5466-409 overspeed) that provide a safety layer for the generator set, working in concert with the control functions of the synchronizer.
EGCP-3 Control Panel: Woodward’s integrated generator control panel that often incorporates synchronization functionality.
Woodward ToolKit Software: The essential PC-based configuration software used to set up, tune, and monitor the 8440-1713 D.



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