ZES ZIMMER LMG450, Руководство пользователя

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Z E S ZIMMER Electronic Systems GmbH Chapter 6
105
This tab is only accessible if you have chosen EN61000-3-2:2006 with Class C or D or
EN61000-3-12:2005!
Here you have to setup the setting which are required for EN61000-3-2:2006. For class C you
have to enter the fundamental current and the power factor or your device. For class D you
have to enter the active power.
This values are used to calculate the limits. For each value the average measured one is
compared to the entered one. If there is a difference of more than 10% all the limits are
calculated again with the measured values. In this case it might be, that you have to compare
all the measuring results again against the new limits. For this purpose we recommend to use a
special test and evaluation software (like for the SYS61K system).
Class C
With PF and Curr you can enter the power factor and the fundamental current.
Class D
With Pow you can enter the active power.
EN61000-3-12
With Rsce you enter the R
sce
value of the system.
6.2 Measuring ranges (Range)
The settings are the same like in 5.2, ‘Measuring ranges (Range)’. Please note that the
standards require a continuous measuring without gaps. For that reason the auto range
function should be deactivated to prevent a range change, because this will cause a short
measurement with invalid values.
6.3 Definition of measuring values
The following basic definitions are used:
n
The harmonic order.
T The time of an integer number of the periods of the synchronisation signal
Voltage and current
true root mean square:
Utrms
T
u t dt
t
T
=
=
∫
1
2
0
( ) Itrms
T
i t dt
t
T
=
=
∫
1
2
0
( )