Winco DGC-2020 - Manual (Page 223)

9400200990 Rev K DGC-2020 LSM-2020 (Load Share Module) 8-3
CE Compliance
This product complies with the requirements of the following EC Directives:
 Low Voltage Directive (LVD) - 73/23/EEC as amended by 93/68/EEC
 Electromagnetic Compatibility (EMC) - 89/336/EEC as amended by 92/31/EEC and 93/68/EEC
This product conforms to the following Harmonized Standards:
 EN 50178:1997 - Electronic Equipment for use in Power Installations
 EN 61000-6-4:2001 - Electromagnetic Compatibility (EMC), Generic Standards, Emission Standard
for Industrial Environments
 EN 61000-6-2:2001 - Electromagnetic Compatibility (EMC), Generic Standards, Immunity for
Industrial Environments
Physical
Weight: 1.45 lb (657 g)
Dimensions: See Installation later in this section.
FUNCTIONAL DESCRIPTION
Load Share Overview
A generator is paralleled with other generators on an island system, which is not connected to the utility.
The generator shares load with other generators on the system via the load share line. The load share
line of a generator is driven in proportion to the per unitized kW generation of the generator. The voltage
at the junction of all load share lines is proportional to the per unitized average power generation of the
system. For example, if the load share line operating voltage is 0 to 3 volts, and the measured voltage at
the intersection point is 2 volts, the system is at 2/3 of its kW capacity. The generator uses the measured
load share line input value to calculate per unitized average load level, and uses that as the setpoint for
its kW controller.
A generator has a set of contacts that physically disconnects it from the load share line circuit. These
contacts are open whenever the unit’s generator breaker is open.
If a unit or set of units is paralleled to the utility, they derive their setting from the Mains Parallel Power
Level setting, and disregard the load share line input.
Settings are provided to allow a generator to make a bumpless transition onto the system that is
participating in load sharing. A bumpless transition is also achieved when the generator is brought offline.
Analog Inputs
The analog inputs can be configured to accept voltage or current. These inputs can be used for var, PF,
or kW control. The inputs are configured by using the Settings Explorer in BESTCOMSPlus to open the
Programmable Input, LSM Input screen. To set the LSM Analog Input as the control source, use the
Settings Explorer in BESTCOMSPlus to open the Bias Control Settings screens.
Analog Outputs
There are three analog outputs: AVR control, GOV control, and Load Share Line. Each output is
described in the following paragraphs.
Output for Voltage Regulator Control
The AVR output provides remote control of the generator voltage setpoint
Output for Governor Control
The GOV output provides remote control of the generator speed setpoint.
Load Share Line Output
The generator uses the measured LS (Load Share Line) output to calculate per unitized average load
level, and uses that as the set point for its kW controller.