Emerson 7400 How to turn on the System from a Shut down condition, Step Action Response

Series 7400 Single Phase 1+N UPS

How to turn ON the System from a Shut down condition

(Complete this actions on one module at a time)

This procedure should be followed when turning on the one-plus-onesystem from a fully powered down condition - i.e. where the load is not being initially supplied through the internal Maintenance Bypass supply.

Step Action Response

1.Close the module’s Output Isolator and check that the UPS input mains supply (and bypass supply if separate) is turned on externally.

2.Close the input Isolator (and Static Bypass Isolator, if separate).

3.Wait 20 seconds then close the battery circuit breaker: This is located inside the battery cabinet (if used) or is otherwise located adjacent to the battery racks

4.Press the battery metering selector switch [B].

Mimic panel LEDs LS1 LS3 and LS5 should illuminate immediately, to indicate that the load is being supplied through the static bypass line.

(Note: In a Redundant Module system LS5 will not illuminate on the second module to be started as its static bypass line is inhibited).

The inverter should start automatically once the DC Busbar reaches its working voltage (after about 30 seconds), and when this occurs LS4 (inverter OK) will illuminate followed by LS6 (load on inverter).

(Note: In a Non-Redundant module system LS6 will not illuminate on the first module to be started until you reach this point in starting the second module.)

Note that LS5 will extinguish when LS6 illuminates.

Mimic panel LED LS2 should illuminate and LS7 (alarm) should extinguish.

The display should indicate a positive (+) battery charging current.

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