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Question 1 of 6
Intermediate
How many times higher than nominal speed does the motor current reach during the first milliseconds?
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
Which of these isn’t a key dry-run protection benefit for the installer?
Question 4 of 6
Intermediate
How long did it take to replace the pump with a Grundfos SQ?
Question 5 of 6
Intermediate
Where is domestic groundwater extraction typically relevant?
Question 6 of 6
Intermediate
In addition to limiting the current draw from the mains during start-up of the pump, how does the soft-start functionality benefit operation?
Question 6 of 6
Intermediate
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1: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Four times higher
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1: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Six times higher
You can find the answer here >
1: How many times higher than nominal speed does the motor current reach during the first milliseconds?
Seven times higher
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: Which of these isn’t a key dry-run protection benefit for the installer?
The installer can avoid costly callbacks
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3: 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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3: Which of these isn’t a key dry-run protection benefit for the installer?
The installer doesn’t have to worry about water bursts
4: How long did it take to replace the pump with a Grundfos SQ?
30 minutes
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4: How long did it take to replace the pump with a Grundfos SQ?
60 minutes
4: How long did it take to replace the pump with a Grundfos SQ?
90 minutes
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5: Where is domestic groundwater extraction typically relevant?
In big cities.
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5: 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.
5: Where is domestic groundwater extraction typically relevant?
In smaller and medium sized towns.
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6: In addition to limiting the current draw from the mains during start-up of the pump, how does the soft-start functionality benefit operation?
Soft start reduces over-pressure in your piping.
You can find the answer here >
6: In addition to limiting the current draw from the mains during start-up of the pump, how does the soft-start functionality benefit operation?
It reduces the occurrence of water hammer in the pipes and minimises wear during start-up.
6: In addition to limiting the current draw from the mains during start-up of the pump, how does the soft-start functionality benefit operation?
Soft start prevents the motor from getting warm.
You can find the answer here >