Question 1 of 6
Intermediate

Where is domestic groundwater extraction typically relevant?

Question 2 of 6
Intermediate

By how much does the supply voltage decrease before the motor contactor stops the pump?

Question 3 of 6
Intermediate

How many times higher than nominal speed does the motor current reach during the first milliseconds?

Question 4 of 6
Intermediate

Which of these isn’t a key dry-run protection benefit for the installer?

Question 5 of 6
Intermediate

What is the benefit of a slow increase in speed?

Question 6 of 6
Intermediate

What is the most commonly used starting method for motors in 4” conventional pumps?

Question 6 of 6
Intermediate

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1: Where is domestic groundwater extraction typically relevant?
In big cities.
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1: Where is domestic groundwater extraction typically relevant?
In remote areas where it is too costly to extend the municipal water supply to just a few houses.
1: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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2: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 10 %
2: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 15 %
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2: By how much does the supply voltage decrease before the motor contactor stops the pump?
More than 20 %
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3: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Four times higher
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3: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Six times higher
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3: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Seven times higher
4: Which of these isn’t a key dry-run protection benefit for the installer?
The installer can avoid costly callbacks
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4: Which of these isn’t a key dry-run protection benefit for the installer?
The installer doesn’t have to worry about additional components
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4: Which of these isn’t a key dry-run protection benefit for the installer?
The installer doesn’t have to worry about water bursts
5: What is the benefit of a slow increase in speed?
It keeps the motor current low
5: What is the benefit of a slow increase in speed?
It keeps pump movements at a minimum
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5: What is the benefit of a slow increase in speed?
It removes the need for motor contactors
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6: What is the most commonly used starting method for motors in 4” conventional pumps?
Direct on line
6: What is the most commonly used starting method for motors in 4” conventional pumps?
Star delta starters
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6: What is the most commonly used starting method for motors in 4” conventional pumps?
Auto transformer
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