5.6.3 Checking the direction of rotation
1. Make sure that the power cable for the pump provides a clockwise rotating field.
2. Make sure that the motor is properly connected to the power supply. (
⇨
When terminals U1, V1 and W1 or conductors U, V and W are connected to
phases L1, L2 and L3 in the order shown, the pump will run in the correct
direction of rotation.
Correct direction of rotation: The pump runs in anti-clockwise rotation, looking
at the suction flange (see arrow on the pump casing).
5.6.4 Motor monitoring
CAUTION
Insufficient motor monitoring
Increased wear! Damage to the pump!
▷
The use of overload protection is imperative.
▷
Use temperature monitoring and dry running monitoring, if required.
Overload protection
1. Protect the motor against overloading by a thermal time-lag overload protection
device in accordance with DIN EN 60439 (VDE 0660) and local regulations (motor
protection switch or contactor).
2. Set the overload protection device to the rated current specified on the name
Temperature monitoring
Thermal motor protection by means of thermistor tripping unit (thermistor relay):
1. Use a thermistor relay which interrupts the power supply in the event of a
thermal hazard to the winding.
2. Connect the thermistor relay cable to terminals 10 and 11 in the terminal box.
NOTE
PTC thermistors for monitoring the winding temperature are fitted as a standard feature.
Dry running monitoring
If system conditions are such that the pump could run dry due to a lack of fluid,
provide an appropriate monitoring device.
Proven monitoring systems:
▪
Pressure switch
▪
Flow control device
▪
Level control unit
▪
Level control unit
▪
cos
φ
control unit
▪
Current control unit
5 Installation at Site
Etaseco/Etaseco I
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Summary of Contents for Etaseco C
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