5.3.3 Setting of motor currents
Measuring of motor currents is used to check if the current is within the normal range for the pump
and to protect the pump from running dry, with clogged impeller or over currents.
The settings that must be done are explained below.
(This function will only appear in the menu if the pump current inputs are activated I1,I2 and I3.)
Block pumps – when an alarm for high or low current is activated, the pump is always stopped You
can choose if you want the pump to remain blocked until the alarm is confirmed or not to block the
pump and allow it to start next time it is activated in the alternation cycle without the alarm being
confirmed.
Pump- start time – to avoid that an alarm is activated during start of pumps there is a start delay to
allow the pumps to get into normal conditions for example when you use a soft start equipment.
Under current - the low current function is used to protect the pumps from working without fluid or
with a clogged impeller which stops the pump from pumping fluid but does not stop the impeller from
rotating
Over current - high current mostly occurs when the impeller can´t rotate freely and therefor increases
the current.
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