110 The PQF-Manager user interface
Manual Power Quality Filter PQFM
−
Temperature of the hottest IGBT (‘T IGBT’) of the unit selected by the ‘Select unit’-
option. Temperature of the hottest IGBT (T IGBT max) in a multi-unit system
−
Temperature of the control board (‘T Control’) of the unit selected by the ‘Select
unit’-option
−
Temperature of the hottest control board (‘T control max’) in a multi-unit system
−
Temperature recorded by the optional temperature probes (up to 8 probes can
be connected on each PQF-Manager)
7.8.3
The ‘Min-Max logging’ menu
The ‘Min-Max logging’ function allows for the user to log for each significant measured
item and since the last reset:
−
The maximum (or minimum) value
−
The duration above (or below) the threshold
Once a threshold has been set the PQF-Manager starts recording the maximum (or
minimum) value automatically as well as the total duration until a reset is performed
.
illustrates this.
Threshold
Maximum recorded
Time
Total duration = t
1
+ t
2
+ t
3
t
1
t
2
t
3
Figure 81: Illustration of the threshold and the maximum recorded value used in the Min/Max
logging function
The parameters that can be used with the logging function are voltages (Vrms, THDV),
currents (Irms), Power (P, Q, S), frequency and temperature (T IGBT and Tcontrol) along
with temperatures recorded by the probes (max. 8 probes possible). All information
about temperature are specific to the probe connected to the PQF-Manager where the
probe is connected. Refer to
for an explanation of the parameters. For the
frequency, minimum values and duration below a threshold can also be recorded.
The recorded information may be cleared by selecting and validating the ‘Reset’ item.
