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7.6.3
The 'Min-Max logging' menu [/Welcome/Measurements/Min-Max logging]
The 'Min-Max logging' function allows for the user to log for each significant measured
item and since the last clearance:
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.
Figure 70
Figure 70: Illustration of the threshold and the maximum recorded value used in the Min/Max
The parameters that can be used with the logging function are Vrms, THDV, Irms, P, Q,
S, f, T IGBT max and Tcontrol max. Refer to
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.
If the hardware lock is engaged, the logging function cannot be started nor reset (Cf.
Section
Figure 71
monitored. The nominal network voltage is assumed to be 400 V. The threshold was
initially set at 1000 V and is changed to 250 V.
82 The PQF-Manager user interface ç Manual Power Quality Filter PQFS
Apparent power S
o
Displacement power factor cos j
o
Power factor PF
o
· Temperatures: (Refer to
Temperatures may be expressed in °C and in °F. For changing the temperature
unit, go to [/Welcome/Settings/Customer set. /Temp unit].
Temperature of the hottest IGBT ('T IGBT') and the hottest phase ('Hot
o
phase') of the unit selected by the 'Select unit'-option. For PQFS filters,
the hottest phase function is not available and a default value '1' is
shown.
Temperature of the hottest IGBT (T IGBT max) in a multi-unit system
o
Temperature of the control board ('T Control') of the unit selected by the
o
'Select unit'-option
Temperature of the hottest control board ('T control max') in a multi-unit
o
system
· The maximum (or minimum) value
· The duration above (or below) the threshold
illustrates this.
7.4)
shows an example in which the network voltage between L1 and L2 is
Table 34
for an explanation of the symbols)
logging function
Table 34
for an explanation of the symbols.
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Troubleshooting
