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Woodward 9907-252 Load Sharing Module

Woodward 9907-252 Load Sharing Module

WOODWARD LOAD SHARING MODULE 0.5–4.5 VDC OUTPUT
GENERATOR LOAD CONTROL
9907-252
Load Sharing Module
 
Designed to measure generator load and provide a controlled 0.5–4.5 Vdc signal to the engine speed control for balanced generator operation.
KEY FUNCTIONS
Isochronous
LOAD SHARING
Droop
LOAD CONTROL
SPM-A Compatible
SYNCHRONIZATION INPUT
18–32 Vdc
POWER SUPPLY
0.5–4.5 Vdc
ANALOG OUTPUT
0–11%
DROOP RANGE
–40 to +70°C
OPERATING TEMP.
WOODWARD · LOAD SHARING MODULE
9907-252
0.5–4.5 Vdc Output Load Sharing Module
 

The Woodward 9907-252 Load Sharing Module is designed for generator-set engines equipped with speed controls that accept a 0–5 Vdc speed-setting signal.

The module measures generator power using PT and CT inputs and produces a 0.5–4.5 Vdc signal to the engine speed control. It supports both isochronous load sharing and droop operation.

PRODUCT PROFILE
Manufacturer Woodward
Part Number 9907-252
Product Type Load Sharing Module
Output 0.5–4.5 Vdc
Application Generator Sets
Isochronous
LOAD SHARING
Droop
OPERATION
SPM-A
SYNCHRONIZER
Speed Trim
REMOTE ADJUSTMENT
CONTROL FLOW
How 9907-252 Works
INPUT
PT + CT
PROCESS
9907-252
Load Sharing Module
OUTPUT
0.5–4.5 Vdc
CONTROL
Engine Speed
The power sensor uses generator voltage and current inputs to produce a load signal proportional to generator real load. The comparator then adjusts the output to the speed control until the required load-sharing condition is reached.
OPERATING LOGIC
Isochronous & Droop Control
MODE 01
Isochronous Load Sharing
When both the droop contact and circuit-breaker auxiliary contact are closed, the load-sharing relay is energized and the module operates on the common load-sharing lines for isochronous load sharing.
MODE 02
Droop Operation
Droop mode is selected when either the external droop switch or the circuit-breaker auxiliary contact is open. Engine power output then varies according to the selected droop percentage.
WOODWARD 02035
Technical
Specifications
 
Power Supply 18–32 Vdc, approximately 5 W
Protection Undervoltage, overvoltage to +80 Vdc, reverse voltage to –32 Vdc
3-Phase PT Inputs 100–240 Vac line-to-line, 50–400 Hz
PT Input Burden 1.6 W/phase at 240 Vac; 0.4 W/phase at 120 Vac
3-Phase CT Inputs 3–7 Arms at full load
CT Input Burden 0.1 VA per phase
Load Sharing Input 0–3 Vdc into 25 kΩ in isochronous mode
Analog Output +0.5 Vdc minimum to +4.5 Vdc maximum
Zero Error Output +2.50 ±0.05 Vdc
Output Impedance 2 kΩ
Speed Trim ±7.5% with external 10 kΩ potentiometer*
Droop Adjustment 0–11% speed reduction*
Synchronizer Input Compatible with optional Woodward SPM-A Synchronizer
* When used with a speed control having a gain of 5% speed change per volt.
INSTALLATION GUIDANCE
Important Installation Notes
Provide adequate ventilation for cooling and enough space for servicing. Protect the module from direct water exposure and condensation.
Keep the control away from high-current, high-voltage and EMI-producing devices. Protect the module from excessive vibration.
Install as close as practical to the electronic engine control. Do not mount the Load Sharing Module directly on the engine.
Power wiring: The 24 Vdc source must remain between 18 and 32 Vdc continuously. A 2 A fast-acting fuse or circuit breaker is required in the 24 Vdc supply line.
FIELD CONNECTIONS
Control Interfaces
Engine Speed Output
0.5–4.5 Vdc output is available from terminals 19 and 20, with terminal 21 available for an optional external 5 Vdc reference.
SPM-A Synchronizer
Optional synchronization input connects through terminals 24 (+) and 25 (–).
Speed Trim
An external 10 kΩ, 10-turn potentiometer may be connected to terminals 26, 27 and 28.
PHYSICAL DATA
Dimensions & Environmental Ratings
273.6 mm
LENGTH MAX.
214.1 mm
WIDTH
59.2 mm
HEIGHT
1397 g
WEIGHT APPROX.
–40 to +70°C
OPERATING TEMP.
40 G
SHOCK · 11 ms
4 G
VIBRATION
95% RH
NON-CONDENSING TEST
GENERATOR APPLICATIONS
Typical System Use
Parallel Generator Sets
Balanced load sharing between compatible generator sets.
Isochronous Systems
Constant-frequency operation with active load matching.
Droop Systems
Load control against another generator or infinite bus.
Synchronization
May be integrated with the Woodward SPM-A Synchronizer.
AMIKON LIMITED · INDUSTRIAL AUTOMATION SUPPLY
Why Amikon Limited
More Diverse Parts We continue to innovate and improve the global supply of automation parts. Wherever our customers are located, and however difficult a part may be to find, our goal is to connect customers around the world through reliable industrial spare-parts supply.
Our business covers a broad range of industrial automation brands and product categories, allowing us to support customers worldwide with the parts required for maintenance, replacement and plant operation.
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Contact
Information
 
Need Woodward 9907-252? Contact our sales team for stock, lead time and quotation.
SALES MANAGER
Miya Zheng
EMAIL
sales@amikon.cn
PHONE / WHATSAPP
86-18020776792
POPULAR INDUSTRIAL SPARES
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Looking for Woodward 9907-252?
Load Sharing Module · 0.5–4.5 Vdc Output · Isochronous / Droop · Generator Control
Miya Zheng    |    sales@amikon.cn    |    86-18020776792
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