Brown Out Question

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mmas0n

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I have a customer who experienced a brown out in his area. He lives in a rural farm area and irrigates his pasture with a 3ph, 240V, 7hp pump. When the brown out occurred the voltage drop burnt the pump up. My question is there a safety switch available to prevent this from happening in the future.
 
C

Cow

Senior Member
Location
Eastern Oregon
Occupation
Electrician
Phase fail relay, set it tight, so any dip in voltage drops the pump out. We use the brand Time Mark usually. When you wire it into the controls make sure the pump drops out and must be manually reset, you don't want the starter chattering in case the voltage fluctuates.

We usually put them in series with the holding contact.
 
brian john

brian john

Senior Member
Location
Leesburg, VA
Cow said:
Phase fail relay, set it tight, so any dip in voltage drops the pump out. We use the brand Time Mark usually. When you wire it into the controls make sure the pump drops out and must be manually reset, you don't want the starter chattering in case the voltage fluctuates.

We usually put them in series with the holding contact.
Click to expand...

Ot install a time delay on it where voltage has to be stable for a set period prior to auto restart. If a manual restart is not practical.
 
beanland

beanland

Senior Member
Location
Vancouver, WA
Pumptec

Pumptec

We have clients who use pumptec motor protectors. They drop the contactor at 207V after 2.5 seconds. They also can do loss of phase, loss of load, locked rotor, etc.
 
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