How many times higher than nominal speed does the motor current reach during the first milliseconds?
What is the most commonly used starting method for motors in 4” conventional pumps?
By how much does the supply voltage decrease before the motor contactor stops the pump?
Where is domestic groundwater extraction typically relevant?
How does the integrated dry-running protection work?
What is the benefit of a slow increase in speed?
Test results
Q: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Four times higher
Q: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Six times higher
Q: How many times higher than nominal speed does the motor current reach during the first milliseconds?
A: Seven times higher
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Direct on line
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Star delta starters
Q: What is the most commonly used starting method for motors in 4” conventional pumps?
A: Auto transformer
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 10 %
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 15 %
Q: By how much does the supply voltage decrease before the motor contactor stops the pump?
A: More than 20 %
Q: Where is domestic groundwater extraction typically relevant?
A: In big cities.
Q: Where is domestic groundwater extraction typically relevant?
A: In remote areas where it is too costly to extend the municipal water supply to just a few houses.
Q: Where is domestic groundwater extraction typically relevant?
A: In smaller and medium sized towns.
Q: How does the integrated dry-running protection work?
A: It automatically restarts 3 minutes after shut down.
Q: How does the integrated dry-running protection work?
A: It prevents sand from damaging the pump.
Q: How does the integrated dry-running protection work?
A: It automatically shuts down the pump if water shortage is detected.
Q: What is the benefit of a slow increase in speed?
A: It keeps the motor current low
Q: What is the benefit of a slow increase in speed?
A: It keeps pump movements at a minimum
Q: What is the benefit of a slow increase in speed?
A: It removes the need for motor contactors