We typically use a GE Multilin located at the MCC for motor protection along with surge protection at the well AND the traditional heaters at the starter. The thing about the Multilin is that it is a great product for conditions such as overvoltage, undervoltage, current unbalance...
277/480V, 3-phase, 4-wire service...the MCC bus does not carry the neutral thru...I don't know how long they last...we found them because the motor failed...the windings of the stator were blown out on one of the radial ends.
At the service entrance I will use a Phoenix Contact SystemTRAB no. 5602746 which has the arrestors and TVSS...and at the well head I planned on using another Phoenix Contact SystemTRAB no. 5602746 (again with arrestors and TVSS).
Usually we connect the surge protection devices to ground rods...
Thanks DPC for the reply.
When you say "Usually, for a submersible..." What size (in HP) are you talking about? The submersibles that I am writing about are in the 100 HP to 350 HP range.
Thanks again.
We are having problems with submersible water well pumps (with motors) failing due to a surge. Our latest design is having surge protection at the service entrance and at the power cable junction box located at the top of the water well head. Both surge protection devices go to ground via a...
