b
Note
The set temperature operating points and hysteresis are equally valid
for the controller basic module and the additionally connected temperature
module!
Operating instructions
multicomp
Version 4.00
Page 43 of 62
ED
EBD
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Moreover, limits are set for the overvoltage switch-off of the facility, monitoring of the capacitor contactor
operating cycles and the switch-off of stages if voltage harmonics are too high.
The setting range of the overvoltage switch-off goes up to 150% of the measuring voltage, i.e. for a
programmed measuring voltage of primarily 400V Ph/Ph the setting range is 230V to 346V Ph/N. The setting
range is dependent on the programmed primary measurement voltage.
When the limit for the overvoltage switch-off is exceeded, the hooked up capacitor stages are immediately
switched off. After the temperature has dropped below the limit by 1% (of the limit) the capacitor stages are
hooked up again after the discharge time has elapsed.
b
Note
The default setting for the overvoltage limit is, for a measurement voltage of 230V
PH-N, about 7% more, i.e. 245V PH-N. In case of operation via voltage transformer,
the limit has to be set accordingly higher.
Example: For a voltage transformer of 500V PH-PH primary and 230 V PH-PH
secondary, the limit has to be set to 535V PH-PH (500V PH-PH + 7% (=35V) equals
535V PH-PH).
This limit has to be configured manually!
The
limit
of the capacitor contactor operating cycles
is used as an indication for customers that due to the
number of switches accumulated, the capacitor contactor could be worn out. This message in no way
influences the function of the compensation facility. It is used merely as a "maintenance instruction".
The
limit
of the harmonic switch-off
refers on one hand to the total of all measurement voltage harmonics
(Lim harm. U HD), on the other hand, limits may be assigned for each harmonic separately (3rd to 13th Harm.
U). The programming range lies between 0 and 99%.
Furthermore it can be set here whether the alarm relay should switch in case a limit is violated, stages should
be switched off, or both. In addition, harmonics monitoring can be disabled here.
Under the item
Reset
there are various methods of resetting the programmed parameters of the controller. This
has the advantage that not all programmed parameters are deleted at the same time, but only a specific range.
The following reset options are available:
1. Commissioning - Reset:
You can reset the parameters to the commissioning status,
i.e. error state and current transformer ratio are deleted.
2. Reset limits:
For Ph/N and Ph/Ph voltage, as well as voltage harmonics
3. Reset extreme values:
All maximum and minimum values recorded are deleted at once
(overview of maximum and minimum values: cf. list).
4. Reset stage parameters:
The stage parameters stage power, cabinet No., discharge time,
detuning / reactor factor, operating cycle alarm limit, facility type, special
outputs fans / error message relay are deleted for all stages at once.
