Woodward 9907-252 User Manual

Installation and Operation Manual
Load Sharing Module
0.5–4.5 Vdc Output
9907-252
Manual 02035 (Revision B)

Woodward 9907-252 Specifications

General

Brand	Woodward
Model	9907-252
Category	Control Unit
Language	English

Summary

Safety and General Precautions

Safety Alert Symbol and Hazard Definitions

Explains safety alert symbol and hazard definitions (Danger, Warning, Caution, Notice).

Prime Mover Overspeed Protection

Mandates overspeed shutdown device for prime movers.

General Operating Precautions

Stresses reading the manual and following all safety instructions.

Unauthorized Modifications Warning

Warns against modifications and their warranty implications.

Electronic Component Handling Notice

Advises on proper handling of electronic components per manual.

Electrostatic Discharge (ESD) Safety

ESD Prevention for Electronic Components

Details procedures to prevent static damage to electronic components.

General Information and System Overview

Load Sharing Module Introduction

Overview of the module's purpose and applications.

Load Sharing Module Description

Details the module's capabilities and integration with other systems.

Typical System Diagram

Illustrates a typical system using the Load Sharing Module.

Physical Outline and Dimensions

Load Sharing Module Outline Drawing

Provides a visual representation of the module's physical layout.

Internal Circuitry Block Diagram

Load Sharing Module Block Diagram

Illustrates the internal functional blocks and signal flow.

Wiring and Connection Guidelines

Generator Connection Requirements

Details wiring rules for PT and CT connections, including phasing.

Plant Wiring Diagram Overview

Shows the overall system wiring for the module.

Wiring Diagram Details

Single and Three-Phase Wiring Configurations

Illustrates specific wiring configurations for single and three-phase systems.

Installation and Mounting Guide

Installation Introduction and Unpacking

Outlines installation overview and unpacking instructions.

Location Considerations for Mounting

Specifies environmental and physical requirements for module placement.

Wiring, Power, and Shielding Requirements

General Wiring Requirements

Covers grounding, EMC earth, wire types, and terminal screw torque.

Power Supply Specifications

Details the voltage and stability requirements for the 24 Vdc power source.

Shielded Wiring Guidelines

Explains how to use and prepare shielded cables for signal integrity.

Shielded Cable Preparation

Preparing Shielded Cables for Connection

Step-by-step guide for stripping and preparing shielded cables.

Generator Connections and Load Sharing Logic

Potential and Current Transformer Connections

Instructions for connecting PTs and CTs for proper phase operation.

Current Transformer Specifications

Details sizing and burden requirements for current transformers.

Droop and Auxiliary Contact Wiring

Explains wiring for droop mode selection via contacts.

Module Outputs and Input Options

Output Signal to Engine Speed Control

Describes the 0.5-4.5 Vdc signal output to the speed control.

SPM-A Synchronizer Input Connection

Details wiring for connecting an SPM-A synchronizer.

Speed Trim Potentiometer Connection

Explains how to connect a speed trim potentiometer for adjustments.

External 5 Vdc Reference Option

Covers connecting an external 5 Vdc reference voltage.

Setup and Calibration Overview

Introduction to Setup and Calibration

Overview of the calibration process for load sharing characteristics.

Initial Power and Load Signal Checks

Steps for verifying power input and adjusting load gain.

Phasing Check and Adjustment

Potential Connection Phasing Verification

Verifies correct phase connections for PT inputs.

Load Signal Measurement and Gain Adjustment

Measures load signal voltage and adjusts gain.

CT Phasing Check and Correction

Checks and corrects CT phasing for accurate load sensing.

Phase Correction Procedure for CTs

CT Phase Connection Procedure Steps

Detailed steps to ensure correct CT connections and polarity.

Temporary CT Connections for Phasing

Temporary CT Connection Setup Diagram

Illustrates temporary connections for CT phasing checks.

CT Wire Reconnection Steps

Details steps for disconnecting and reconnecting CT wires for testing.

Final CT Phasing and Wire Labeling

CT Wire Polarity Testing

Tests polarity of CT wires by measuring load signal voltage.

Final CT Connection and Wire Labeling

Connects CTs based on test results and labels wires.

Load Gain and Droop Setting

Load Gain Potentiometer Adjustment

Adjusts the LOAD GAIN potentiometer for proper load sharing.

Setting Droop for Isolated Loads

Procedure to set droop for isolated load conditions.

Droop Adjustment for Isolated Loads

Isolated Load Droop Setting Procedure

Details adjusting droop for isolated load using speed vs. load graph.

Droop Adjustment Speed vs Load Graph

Visual representation of speed changes with load for droop settings.

Droop Adjustment for Infinite Bus Operation

Infinite Bus Droop Setting Procedure

Procedure to set droop when paralleled with an infinite bus.

Module Theory of Operation

Module Operation Introduction

Overview of the module's function in load sharing and droop.

Internal Power Supply Function

Explains how the internal power supply operates.

Power Sensor Operation Details

Details how the module senses generator load and power factor.

Load Comparator Circuit Function

Explains how load signals are balanced across generators.

Speed Trim Circuit Function

Describes the role of the speed trim circuit.

Operational Modes and Output Signals

Isochronous Load Sharing Explained

How the module achieves isochronous load sharing.

Droop Operation Explained

How the module operates in droop mode.

Auxiliary Equipment Integration

How other Woodward equipment interacts with the module.

0.5-4.5 Vdc Output Signal Details

Details the output signal range and its use.

Troubleshooting Common Issues

Troubleshooting Introduction and Guide

Guide to isolate problems in wiring, engine, or module.

Speed Decrease and Erratic Operation

Addresses problems with speed decrease and erratic module operation.

Low Load Signal Voltage Issues

Solutions for low load signal voltage that LOAD GAIN cannot fix.

Troubleshooting Load Sharing Problems

High Load Signal Voltage Issues

Diagnosing and resolving high load signal voltage problems.

Engine Load Sharing Failure

Troubleshooting why engines fail to share load properly.

Product and Service Options

Product Service Options Overview

Lists available options for product support and troubleshooting.

OEM and Packager Support

Explains support provided by equipment manufacturers.

Woodward Business Partner Support

Details support from Woodward's network of business partners.

Woodward Factory Service Options

Factory Service Program Options

Describes available factory service programs.

Replacement/Exchange Service

Details the immediate replacement service option.

Flat Rate Repair and Remanufacture

Explains flat rate repair and remanufacture services.

Returning Equipment and Ordering Parts

Returning Equipment for Repair Procedures

Instructions for returning units for repair, including required information.

Packing Guidelines for Control Units

Proper packing procedures for returning electronic controls.

Replacement Parts Ordering Information

Information needed when ordering replacement parts.

Engineering Services and Contact Information

Engineering Services Offered

Details technical support, training, and field service.

How to Contact Woodward Worldwide

Provides contact details for Woodward facilities worldwide.

Technical Assistance Requirements

Information Needed for Technical Support

Lists information required for technical assistance calls.

LSM Control System Specifications

Power Supply Specifications

Details voltage range, wattage, and protection features.

Input Specifications Summary

Covers PT, CT, Load Sharing, Sync, Speed Trim, Droop, and Reference inputs.

Output Specifications Summary

Details load signal and analog output characteristics.

Adjustment Specifications Summary

Covers specifications for Droop and Load Gain adjustments.

Environmental, Dimensional, and Compliance Specs

Environmental Operating Specifications

Details operating temperature, salt fog, humidity, vibration, and shock resistance.

Installation and Dimension Specifications

Covers overvoltage category, air quality, dimensions, and weight.

Safety and EMC Standards Compliance

Lists compliance with EMC and Low Voltage Directives, and UL listing.

Declaration of Conformity Details

Conformity to EMC Directive Standards

Declares compliance with EMC directive and relevant standards.

Conformity to Low Voltage Directive Standards

Declares compliance with Low Voltage Directive and relevant standards.

Publication Feedback and Company Contact

Providing Publication Feedback

Instructions for sending comments on the publication.

Woodward Company Contact Information

Provides company address, phone, fax, and website.