Specifications

Installation Instructions
7
3. Set ground fault selection switch.
On trip units with ground fault protection, the ground fault
selection switch on the side of the trip unit must be set to the
appropriate sensing scheme—Residual or Source Ground/Zero
Sequence—prior to installing the trip unit.These ground fault
sensing schemes are discussed on page 18.
4. Check label on side of trip unit.
Before attempting to install the trip unit, check the label on
the side of the unit to make sure that it is the correct unit
for the SB breaker. A built-in rejection scheme will prevent
the installation of a trip unit into a breaker for which it is
not intended.
This scheme consists of two pins on the support plate on
which the trip unit will set into two matching holes in the
bottom of the trip unit. If the holes in the bottom of the trip
unit cannot be aligned with the pins, the trip unit cannot be
installed in the SB breaker.
5. Check alignment of “rejection-scheme” pins with holes.
If there is any doubt about a trip unit being the correct trip
unit for a breaker, hold the trip unit upside down and check
the alignment of the pins and holes.
6. Mate pin connectors.
Mate the connector half on the back of the trip unit with its
corresponding connector half in the breaker.
WARNING
Do not attempt to modify
rejection features.