Fluke 1743 User Manual page 56

PQ Log
Users Manual
Indicates the V
variation. The % V
the EN 50160 standard, this limit value is 230 V – 10 %, i.e. 207 V.
A voltage variation occurs when the measured mean value (according to
the EN 50160 standard, the 10 minute mean value) is above or below the
limit value. The standard is met if 95 % of all measured values are between
the positive and the negative 95 % limit value and 100 % of all measured
values are within the 100 % limit value tolerance band.
Short voltage surges or dips are recorded as events. The limit values for
events can only be defined in job processing.
Line Frequency
Fundamental Frequency
This value cannot be changed. For 60 Hz versions of Logger, select an appropriate limit
value file.
Positive tolerance, 99.5 % of the measuring periods
Indicates the upper limit value, which, when exceeded, is registered as an exceeding of
the mains frequency. The % f
the standard case, this limit value is 50 Hz + 1 %, i.e. 50.5 Hz.
Negative tolerance, 99.5% of the measuring period
This value is similar to the positive tolerance. Limit Value is 49 Hz.
A frequency variation of the voltage occurs if the measured mean value
(according to the EN 50160 standard, the 10 minute mean value) is above
or below the limit value. The standard is met if 95 % of all measured values
are between the positive and the negative limit values.
Positive tolerance, 100 % of the measuring period
Indicates the upper limit value, which, when exceeded, is registered as an exceeding of
the mains frequency. The % f
the standard case, this limit value is 50 Hz + 4 %, i.e. 52 Hz.
Negative tolerance, 100 % of the time
This value is analogous to the positive tolerance. According to the standard, the limit
value is 47 Hz. (- 6 % f
If the values under normal operating conditions are above or below these
values, it is considered to be a violation of the standard. All values must
fulfill this requirement (100 %).
Flicker
Indicates the limit value for permissible flicker level Plt.
48
lower limit value, which, when exceeded, is registered as a slow voltage
n
is entered. The limit value is calculated as V
n
Note
Note
is entered. The limit value is calculated as f
n
Note
is entered. The limit value is calculated as f
n
).
n
Note
- x % V . According to
n n
+ x % f . In
n n
+ x % f . In
n n