MOTOR UPGRADE: WHAT CHANGES?
MOTOR UPGRADE: WHAT CHANGES?
(OP)
Hi, I am upgrading an existing 3 hp motor with a 5 hp motor. I have an old Reliance vfd controller. I'm just wondering what changes will I have to make due to the motor change? I couldn't really find anything in the vfd programming manual.
any help is appreciated. Thanks!
any help is appreciated. Thanks!





RE: MOTOR UPGRADE: WHAT CHANGES?
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: MOTOR UPGRADE: WHAT CHANGES?
RE: MOTOR UPGRADE: WHAT CHANGES?
Yes, the VFD is rated for 5 hp.
The drive system can handle the extra torque, actually that's why it was upgraded.
I'm more worried about the electrical stuff. Mechanically it seems to be in spec.
RE: MOTOR UPGRADE: WHAT CHANGES?
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: MOTOR UPGRADE: WHAT CHANGES?
You may need to adjust the current limits set in the VFD.
RE: MOTOR UPGRADE: WHAT CHANGES?
Keith Cress
Flamin Systems, Inc.- http://www.flaminsystems.com
RE: MOTOR UPGRADE: WHAT CHANGES?
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376
RE: MOTOR UPGRADE: WHAT CHANGES?
thanks everyone.
RE: MOTOR UPGRADE: WHAT CHANGES?
JRaef.com
"Engineers like to solve problems. If there are no problems handily available, they will create their own problems." Scott Adams
For the best use of Eng-Tips, please click here -> FAQ731-376