franyoud
Marine/Ocean
- Oct 23, 2014
- 1
Dear community, I was wondering is someone can help regarding a technical assesment on a topic I'm working on. Is it relating to ANSI 66 protection on Switchgears (Number of Start per hours).
The one we are using to protect motor is SEPAM, and in our case have the protection defining number of start per hour in cold and hot mode. In addition to the number of Start also delay between start and stop can be set (either at 0 or 1min to hour).
In our case we have considered to implement the 1min delay between start and stop to avoid motor re-acceleration (while still spining) effect which can lead to much inrush than normal starting. Have you ever face this matter with the delay between start and stop in your protection study of HV motors involving ANSI 66 ? Does it sound relevant to you to keep this 1min delay for MV motors (from several hundred kW to MW) ?