Single-Module Mechanical Installation
6
Once the equipment has been finally positioned and secured, connect the power cables as described in
the following procedure.
Refer to the appropriate cable connection drawing in 2.0 - Installation Drawings.
1. Verify that the bypass equipment is isolated from its external power source and all the power
isolators are open. Check that these supplies are electrically isolated and post any necessary
warning signs to prevent their inadvertent operation.
2. Open the door to the cabinet and remove the interior panels.
3. Connect the ground and any necessary main bonding jumper to the equipment ground busbar.
4. Connect the AC input supply cables between the power distribution panel and the bypass input
supply busbars (A-B-C or A-B-C-N terminals) and tighten the connections to the proper torque.
Ensure correct phase rotation!
5. If system is one- or two-input, connect the AC input supply cables between the maintenance
bypass cabinet and the UPS bypass input supply busbars (A-B-C or A-B-C-N terminals) and
tighten the connections to the proper torque.
Ensure correct phase rotation!
6. If system is single-input, connect AC jumper connectors between UPS bypass input supply
busbars and UPS rectifier input supply busbars (A-B-C terminals) and tighten the connections to
the proper torque.
Ensure correct phase rotation!
7. Connect the system output power cables between the Maintenance Bypass Cabinet output (A-B-C
or A-B-C-N terminals) and the critical load and tighten the connections to the proper torque.
Ensure correct phase rotation!
8. Connect the auxiliary cables of any external interface/signals to the respective connections of the
output auxiliary terminal block (X4) (see2.0 - Installation Drawings).
9. Replace interior panels and close door.
NOTE
The grounding and neutral bonding arrangement must be in accordance with local and
national codes of practice.
NOTE
Care must be taken when routing power cable. Ensure that cables do not touch other busbars
(see Figure 11).
NOTE
Do not double-stack lugs: do not layer two lugs on the same side of the busbar (see Figure 11).
