Operation
21
When it comes to the load calculation, the NIM 1000 utilises the following physical
correlation between the measurements for short-circuit power P
K
, the maximum rated
output P
MAX
and the anticipated voltage dip V
DIP
:
𝑉
𝐷𝐷𝐷
2
− 𝑉
𝐷𝐷𝐷
+
𝑃
𝑀𝑀𝑀
𝑃
𝑘
= 0
Now, depending on the application scenario, only one of the two unknown variables
need be given in order to calculate the other:
Application scenario
Procedure
A large consumer with a known load (P
MAX
) should be
connected to the measurement point and the
anticipated voltage dip (in %) calculated.
Call up the
menu item and
select the option
V
DIP
. Then
enter the load of the appliance.
The aim is to calculate the maximum load which can be
connected to the measurement point without any
voltage dip defined by existing guidelines being
exceeded.
This function can also be used to calculate the
maximum feed-in load (e.g. of a PV
installation). Accordingly, in this case it is the
maximum permissible mains voltage increase
instead of the voltage dip which must be
specified.
Call up the
menu item and
select the option
P
MAX
. Then
enter the maximum permissible
voltage dip.
Explanations
concerning the load
calculation
P
MAX
(1 – V
DIP
) ∙ U
Z / P
K
U
Measurement
Analysis (load calculation)
Summary of Contents for NIM 1000
Page 1: ...1 NIM 1000 Net Impedance Meter USER GUIDE Issue 04 06 2016 EN Article number 82941 ...
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