The ET 1.0 trip unit cannot be
field replaced or have the long-time trip point setting adjusted.
All these devices use bolt-on connection. It may be used only
on busway with same number of poles. Not for use on 800 A copper busway.
To complete the catalog number, replace the blank with an “H”
for horizontal applications and “V” for vertical applications.
All M-frame plug-in units are 800 A frame, and the trip setting
can be adjusted to 300 A, 350 A, 400 A, 450 A, 500 A, 600 A, 700 A,
or 800 A.
For IP54 splash resistant construction, add an "M54" suffix.