700.5 Transfer Equipment.
(A) General.
Transfer equipment, including automatic transfer
switches, shall be automatic, identified for emergency use,
and approved by the authority having jurisdiction. Transfer
equipment shall be designed and installed to prevent the inadvertent
interconnection of normal and emergency sources of
supply in any operation of the transfer equipment. Transfer
equipment and electric power production systems installed to
permit operation in parallel with the normal source shall meet
the requirements of Article 705.
(C) Automatic Transfer Switches.
Automatic transfer
switches shall be electrically operated and mechanically
held. Automatic transfer switches, rated 600 VAC and
below, shall be listed for emergency system use.
Ok, i'll ask by another way, does the listed ATS for emer. would have a trip unit ?Is it listed for emg. systems?
Ok, i'll ask by another way, does the listed ATS for emer. would have a trip unit ?
Yes, where i use as a disconnecting mean.Does the ATS have to have over current protection?
I'm referring to thermal magnetic trip.Are you referring to an instantaneous only or thermal magnetic trip unit unit?
Yes, where i use as a disconnecting mean.
I'm referring to thermal magnetic trip.
Thanks! I'm going to have to fire up my desk top an look at the video.Here is a link to an Eaton presentation discussing breaker vs contactor ATS.
http://www.eaton.com/flash/electric...ory.html?elq=4a8d649def69420294a96d7bcd16bc71