EMKO EAOM-19 - 4.5 Key Parameter Explanations

4.5ExplanationofParameters
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P00Mainsvoltageconnectionlevel
P01Mainsvoltagedisconnectionlevel
P02Mainsvoltageupperlimit
In Automaticmode,theunitusestheseparameterstodecidewhentoswitchtheload
betweenthemainssupplyandthegenerator.IfthemainsvoltageishigherthantheUpper
LimitorlowerthantheDisconnectionLevel,theunitconnectstheloadtothegenerator
insteadoftothemains.Iftheloadisrunningonthemainsandthemainsvoltagefalls,the
unitwillswitchtheloadtothegeneratorwhenthemainsvoltagefallsbelowtheDisconnection
Level.Conversely,ifthemainsvoltageislowandtheloadisrunningonthegenerator,the
unitwillnotrestorethemainssupplytotheloaduntilthemainsvoltagereachesthe
ConnectionLevel. Thishysteresispreventsconstantswitchingbetweenmainsandgenerator
asthemainsvariesabouttheswitchinglevels.Figure4.1showshow,inautomaticmode,the
loadistransferredbetweenmainsandgeneratorasthemainsvoltagevariesovertime.
Figure4.1LoadSwitchingLevels
4.5.1MainsVoltageConnection(P00)andDisconnectionLevel(P01),UpperLimit(P02)
Default
levels
440V
320V
300V
Time
Mains
voltage
Upperlimit
Mainsvoltage
Connectionlevel
Disconnectionlevel
Loadswitching
Mains
Generator
Generator
Mains Mains Mains
Gen.