WOODWARD 9907-173 Load Sharing Module Rev C

WOODWARD 9907-173 Load Sharing Module Rev C

Product Details

Woodward makes models of its Load Sharing Module for use with engines equipped with speed controls that accept a ±3 Vdc speed setting input, a 0.5 to 4.5 Vdc input, or a PWM (pulse-width-modulated) input. The Load Sharing Module allows use of Woodward power generation accessories and allows load sharing between engines equipped with speed controls that are not manufactured by Woodward and engines controlled with Woodward electronic controls, or controls using other Woodward load sharing modules.

The Load Sharing Module provides isochronous and droop load-sharing capability for engines in generator set applications. Additional equipment in the control system can include the Woodward SPM-A Synchronizer, SPM-D Synchronizer, Automatic Generator Loading Control (AGLC), and Automatic Power Transfer and Loading Control (APTL).

Power Supply:

DC Models 18–32 Vdc, approximately 5 W.

AC Models Jumper selectable for 95–130 or 190–260 Vac line-to-line, 50–400 Hz, approximately 10 W.

Inputs:

3-phase PT Inputs: 95–130 or 190–260 Vac line-to-line, 50–400 Hz. PT input burden is 1.6 W per phase at 240 Vac, 0.4 W per phase at 120 Vac.

3-phase CT Inputs: 3–7 Arms at full load, CT input burden at full load is 0.1 VA per phase.

Load Sharing Input: 0–3 Vdc into 25k impedance in isochronous mode, open circuit in droop mode.

Sync Input: Compatible with optional Woodward SPM-A synchronizer.

Speed Trim: Allows manual adjustment of output level with an external 10 kA potentiometer (not available on part number 9907-173).

Droop Switch: The external droop switch is to be wired in series with the auxiliary circuit breaker contact. Droop mode is selected when either the droop switch or the auxiliary circuit breaker is open.

Outputs:

Load Signal: DC signal proportional to total real current sensed by the Load Sharing Module.

Used to adjust load gain.

Output to Speed Control: +0.5 to +4.5 Vdc analog, ±3 Vdc analog, or PWM, depending on model.

Adjustments

Droop: Provides for output reduction between no-load and full-load conditions.

Load Gain: Provides adjustment of the load on an individual generator when two or more generators are paralleled. Adjusts specified full load condition from 3 to 7 Arms.

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