Hi, I have a pump which is going
Hi, I have a pump which is going
(OP)
Hi,
I have a pump which is going close to over load current for a prolonged period during start up when the pump is running at low flow. Other than flow, what can be causing the high current?
Thanks.
I have a pump which is going close to over load current for a prolonged period during start up when the pump is running at low flow. Other than flow, what can be causing the high current?
Thanks.





RE: Hi, I have a pump which is going
Or maybe the pump is supposed to do this - what does your pump curve say / look like.
What other fault finding have you done?
How long is "a prolonged period during start up" 5 seconds, 5 minutes, 5 hours?
FGS give us something to bite on here.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Hi, I have a pump which is going
Not relates to flow as minimum flow was met in recycle. Current at this flow would be significantly less than we seen.
RE: Hi, I have a pump which is going
What type of pumps is? How do you start the pump?
RE: Hi, I have a pump which is going
I'm more interested in things like motor problems - could a motor issue cause high amps?
RE: Hi, I have a pump which is going
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Hi, I have a pump which is going
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Hi, I have a pump which is going
It is a capital mistake to theorise before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts. (Sherlock Holmes - A Scandal in Bohemia.)
RE: Hi, I have a pump which is going
Several years ago, had a small close-coupled circulator (1/4 hp) literally burn out the motor on two pumps. It isn't until I make a trip to see the pump first hand and open it up that we discover the impeller is destroyed. Fortunately enough of it is intact showing signs of contact with the housing along with shiny areas inside the housing that we determine the failure is due to contact between the impeller and housing. Review of the install manual it quickly becomes clear why; basically the pump was installed in an incorrect and non-manufacturer approved orientation. The orientation is fixed and viola no problems since.
RE: Hi, I have a pump which is going
RE: Hi, I have a pump which is going
Ash Fenn
www.cdrpumps.co.uk
RE: Hi, I have a pump which is going
RE: Hi, I have a pump which is going
You're shutting it down after 30 secs?
Is it reaching design flow in that time?
What is HP of pump and what is design flow?
Is there VFD on the motor? What is controling the VFD?
What is design startup time?
Let me echo LittleInch's sentiment:
More info, more info, more info.
RE: Hi, I have a pump which is going
RE: Hi, I have a pump which is going