Connect the Power Cables for the UPS with Four Internal Switches

NOTICE
RISK OF EQUIPMENT DAMAGE To ensure correct load sharing in bypass operation in a parallel system: All bypass cables must be the same length for all UPSs. All output cables must be the same length for all UPSs. All input cables must be the same length for all UPSs (only required in single mains system). Failure to follow these instructions can result in equipment damage.

Only when the local codes/regulations require removal of the neutral jumper: Remove the neutral jumper (880-74129). The neutral jumper makes a bolted connection of the neutral so that the neutral is not disconnected when the 4-pole switches are opened.

Rear View of the UPS
Only for dual mains: Remove the single mains jumper busbars.

NOTE: Save the single mains jumper busbars. They are needed for testing during start-up of the UPS.

Rear View of the UPS
Connect the power cables in the described order.
1. Connect the PE cables.
  
  NOTE: The earth/PE connection must be common for all the UPSs in the parallel system.
2. Connect the input cables (L1, L2, L3, (N)).
3. Only for dual mains: Connect the bypass cables (L1, L2, L3, N).
4. Connect the output cables (L1, L2, L3, N).
5. Connect the DC cables (DC+, DC-).
Single Mains

Dual Mains
Reinstall the rear panel on the UPS.

Rear View