5 Installation at Site
22 of 56
Ama-Drainer 80/100
2331.823/07-EN
5.5.1 Setting the overload protection device
CAUTION
Motor overload
Damage to the motor!
▷
Protect the motor by a thermal time-lag overload protection device in
accordance with IEC 60947 and local regulations.
CAUTION
Increased wear due to dry running
Damage to the pump (set)!
▷
Never operate the pump set without liquid fill.
▷
Only operate the pump set with dry running protection.
The drive is protected by thermal circuit breakers installed in the stator winding.
When the maximum permissible winding temperature is reached, the thermal circuit
breakers stop the pump set. When the drive has cooled down, the thermal circuit
breakers automatically start up the pump set again.
If the thermal circuit breakers trip the pump set several times in a row, the KSB
inspection service must be informed.
1. Fit an external 3-pole, mechanically interlocked protective device.
2. Set the overload protection device to the nominal motor current. Refer to the
name plate for the setting value. (
Overload protection for Ama-Drainer 80
If the thermal circuit breakers in the motor have tripped the pump, the red lamp at
the multi-functional plug will be lit until the drive has cooled down. The drive re-
starts automatically.
The multi-functional plug comprises a motor protection relay that protects the motor
against overcurrent but not against short circuit. If the motor protection relay in the
multi-functional plug has tripped the motor, the red lamp will be lit until the reset
key is pressed. The manual-0-automatic selector switch at the motor protection relay
must always be set to manual.
Overload protection for Ama-Drainer 100 ... N with LevelControl Basic 2 control unit
The thermistor motor protection relay in the control unit is without function. To
prevent the thermistor motor protection relay from tripping remove the thermistor
motor protection relay from the printed circuit board in the control cabinet and fit a
bridge on the printed circuit board in the control cabinet.
(
▪
1 pump set: bridge on terminals 121-122
▪
2 pump sets: bridge on terminals 121-122 and 221-222
Содержание Ama-Drainer 80
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