Installation
Copyright © 2007-2013 Eaton Corporation. All Rights Reserved.
IPN 997-00012-49G May 2013
25
Step 5 - Install Battery MCBs (if required)
Ignore this Step if the Battery MCBs are already fitted.
The current rating of the MCBs must be derated to 75%.
The APS can use either Chint or Schneider circuit breakers. However, Chint and
Schneider circuit breakers are not interchangeable. When replacing existing circuit
breakers or fitting new ones, use the type that is already in use (see Spare Parts on page
1
Place the battery MCBs side-by-side (see following diagram).
2
Use the battery fuse fail detect loop wire to connect the auxiliary switches in
series.
Use the auxiliary switch terminals that will be closed when the MCB is ON.
3
Fit the MCBs onto the battery tooth-comb bus (at the right hand end) and clip
onto the DIN rail.
4
Tighten the bottom MCB terminals.
5
Connect the battery fuse fail detect wires to the MCB auxiliary switches (see
following diagram). Tighten the terminals.
6
Fit MCB blanks to cover any unused positions.
7
Switch OFF all MCBs.
Battery MCBs (front view)
Auxiliary switches
Fuse fail detect loop wire
Battery fuse fail detect wires
Step 6 - Check if the APS ac and dc earths are bonded
There are two options: ac and dc earths bonded or separated.
1
Check if the APS ac and dc earths are bonded:
Remove top cover (if fitted).
If the ac-dc earth link busbar (at one end of the dc common bar) is fitted (see
following diagram) then the ac and dc earths are bonded. This is the
recommended, factory standard arrangement.
If the busbar is not fitted then the ac and dc earths are separated.
2
If the arrangement of the ac and dc earths is as required, no further action is
required.
3
If the arrangement of the ac and dc earths is not as required, follow the procedure
in Earth Bonding on page
