My 3/4 HP Emerson pool pump keeps tripping breaker

When you switch it on, watch the breaker trip. Does it slowly move to off? That is a lazy breaker and needs replacing. People use breakers as switches and they are not made for that, so they wear out.

If the breaker snaps straight to off, you have a short to earth. Look for water around the electrics particularly at the pump.

If you can't see anything obvious, call out a pool electrician to diagnose and fix.

There are other ideas on the link.

https://www.google.com/search?q=pentair+pool+heater+trips+breaker

..

earth leakage is tripping the breaker from bad insulation or water in the motor or wires

check and test pump motor possible failing but try lubing bearings and check pump impellers for debris

you might have a weak breaker. or a dirty start switch and or a bad capacitor.; search you area for your local pool pump motor repair guy with free testing.. a repair to the motor should cost 20-85$.. remember to prime the pump after a repair.. jay Florida . hit the yes if i was of help

This sounds like the motor has seized up. You will most likely need to replace at least the motor and maybe the complete pump assembly.
You can take the pump into a local motor shop and see if they can rebuild the motor for you.

US Parts Center

It could be out on safety (thermal protected). I would expect this should reset at any time between 10 minutes and an hour depending of a ton of variables. Since the motor is less than a week old, my suggestion is to speak with the reseller you purchased the motor from. If you mess with it before then, there will be no recourse through the reseller and maybe none from the manufacturer.

Is this motor set up for 110 or 220? and ... is it properly wired? Double check before you call anyone to see it.

Double check your breaker ... is this a standard breaker or a GFI? Your pool is fully bonded? The motor has been bonded to the rest of the grid/system? Move the breaker handle to the full off position and then back to full on (make sure the load is OFF before you do this ... then turn the pump back on.

Let me know what you find ...

Thanks for your question @ FixYa.com

Well, something is wrong. Either the pump or the wiring from the switch to the pump. Pull the pump and take it to a motor shop and have them check it out.

If this is a new install, re-check your wiring, If not you have a bad motor.

The motor is bad. It overheats inside and the contacts aren't releasing and this trips the breaker to prevent more damage, You can reset it because it had time to cool down and the contacts have released.

should be a 60 amp breaker