User manual

UMG 96RM
10
General
Power Factor (vectorial) - Lambda
• Thepowerfactorisunsigned.
PF
P
S
A
A
=
CosPhi - Fundamental Power Factor
• Onlythemainsfrequencypartisusedforcalculati-
on of the cosphi.
• CosPhisign:
 -=forthesupplyofrealpower
 +=forobtainingrealpower
PF
P
S
1
1
1
==
cos( ) ϕ
CosPhi total
• CosPhisign:
 -=forthesupplyofrealpower
 +=forobtainingrealpower
cos( )
()(
ϕ
Sum
PPP
PPPQ
fund fund fund
fund fund fund
3
123
123
2
1
=
++
++ +
ffund fund fund
QQ++
23
2
)
cos( )
(
ϕ
Sum
P PPP
PPP
fund fund fund fund
fund fund fun
4
1234
123
=
+++
++
ddfund fund fund fund fund
PQQQQ+++++
4
2
12
34
2
)( )
K-factor
• TheK-factordescribestheincreaseoftheeddycurrentlosseswhenloadedwithharmonics.Forasinusoidalloadon
thetransformer,theK-factor=1.ThelargertheK-factor,theheavieratransformercanbeloadedwithharmonicswit-
hout overheating.
Phase Angle Phi
• ThephaseanglebetweencurrentandvoltageoftheexternalconductorpiscalculatedaccordingtoDINEN61557-12
and displayed.
• Thesignofthephaseanglecorrespondingtothesignofthereactivepower.