We have a customer who has a 50HP motor installed already.
We have an application that calls for a 75HP motor will this require new starters?
Thought!
What about motor's that are purchased 50HP with a 1.35 SF
will the original motor starter be acceptable?
Thought!
If you install 75HP motor and only use 1/2 of the horsepower say 38 NBHP. Can you still use the 50HP starters?
Reason: We have a temperature rise issue involved. The motor amperage used on the 75HP will be far less than nameplated. We can't get the motor rewound for 125 Deg. F fluid temperatures. So if we derate the 75HP down to a 50HP with 1.35 SF = 67.5 NBHP can you still use the 50HP or Nema #3 starters and if so advise and if not advise.
I understand Code is code but if you took a 75HP and rerated it for 67.5 would the Code force you into a Nema 4 starter or could you still use the Nema 3?
What we are doing is trying to save the customer from having to put in new starters. But you guys are the pro's and I'm sure you know the service factors involved in the starter packages more than I.
Let me know - Thanks
wlovison@toyopumps.com
We have an application that calls for a 75HP motor will this require new starters?
Thought!
What about motor's that are purchased 50HP with a 1.35 SF
will the original motor starter be acceptable?
Thought!
If you install 75HP motor and only use 1/2 of the horsepower say 38 NBHP. Can you still use the 50HP starters?
Reason: We have a temperature rise issue involved. The motor amperage used on the 75HP will be far less than nameplated. We can't get the motor rewound for 125 Deg. F fluid temperatures. So if we derate the 75HP down to a 50HP with 1.35 SF = 67.5 NBHP can you still use the 50HP or Nema #3 starters and if so advise and if not advise.
I understand Code is code but if you took a 75HP and rerated it for 67.5 would the Code force you into a Nema 4 starter or could you still use the Nema 3?
What we are doing is trying to save the customer from having to put in new starters. But you guys are the pro's and I'm sure you know the service factors involved in the starter packages more than I.
Let me know - Thanks
wlovison@toyopumps.com