Easy UPS 3M For Internal and External Batteries – Operation PDF
990-5995E-001

Start Up and Add a UPS to a Running Parallel System

Use this procedure to start up a UPS and add it to a running parallel system.

IMPORTANT: Before a UPS can be added to a parallel system, the parallel system must be configured by Schneider Electric.

DANGER
hazard of electric shock, Explosion, or arc flash
Ensure that the Ext. UOB, the MIB, and the BIB for the UPS are in the OFF (open) position before connecting power cables to the UPS.
Failure to follow these instructions will result in death or serious injury.
  1. On the new UPS check that:
    1. All UPS disconnection devices (UIB, SSIB, and UOB) and the Ext. UOB are in the OFF (open) position.
    2. The BB(s) are in the OFF (open) position.
  2. Turn the Ext. UOB of the UPS to the ON (closed) position.
  3. Turn the MIB and the BIB of the UPS to the ON (closed) position.
  4. Turn the UIB, the SSIB, and the UOB of the UPS to the ON (closed) position.

    When the inverter LED turns steady green, the UPS has joined the running parallel system.

    The LEDs on the user interface show as follows:

  5. Turn the BB(s) of the UPS to the ON (closed) position.
  6. Verify correct load sharing between the parallel UPS units.
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