Hi Scott,
Thanks for the reply. Yes, the % ratio error of any of the CT is not exceeding 3%, actual test values are in the range of 0.05%. I guess the ratio error is what is to be checked.
I only have test sheet and a CT excitation plot so unable to determine if the test is done at nominal...
Hi Everyone,
I wanted to know the phase angle error limits for a C800 as per IEEE standard.
BCT type CT, primary 345kV, secondary 34.5kV for transformer
some test sheet values from SAT as below. Trying to ascertain if the value is acceptable.
1. CT is 600:5, 34.5kv side, phase angle error is...
Hi Everyone,
thank you all for your wonderful comments. I had proposed revised settings for the VFD but the operation team were not quite inclined for it. Finally, both motors have been sent for rewinding here in Hamilton ON. Waiting to see the outcome. Will update.
Hi Brian,
Thanks for the reply. This site is in Northern Ontario Canada. Yes, your understanding is correct. VFD is in the MCC itself and is rated for 575v.
As a part of the solution, the electrical contractor proposed to provide a 460-575v transformer, but they quoted a high price owing to the...
Hi Everyone,
A vendor mistakenly sent us two motors, one rated at 460V and the other at 480V, while our Motor Control Center (MCC) operates at 575V. Each motor is equipped with a Variable Frequency Drive (VFD). Due to the long lead time for obtaining 575V motors, we are considering rewinding the...
