Mitsubishi 9800A Series technical manual 3 Single Line Diagram - Battery Operation

MITSUBISHI

ELECTRIC

9800A SERIES UPS

OWNERS / TECHNICAL MANUAL

Page Number:

1-7

C)Battery operation: Load Power supplied by each system UPS battery and inverter.

FIGURE 1.3 Single Line Diagram - Battery Operation

CB

AC Bypass

Input

User supplied

MCCB

RECTIFIER

AC input

CB1

Static Transfer

Switch

CB3

INVERTER 52S

52C

Output

Battery cabinet

CB2	Power Flow
	Not in Use
	UPS Module

Referring to Figure 1.3: In the event of AC input source failure or interruption, each system UPS rectifier will de-energize and each UPS battery will immediately discharge and supply DC power to the Inverter to maintain continuous AC power to the load. This operation will continue until:

a)The battery capacity expires and the inverter turns off, or

b)Input power is restored after which the rectifier will power the inverter and critical load and simultaneously recharge the batteries.

A fully charged battery will provide power for the specified time at the rated load, or longer, at a reduced load.

When power is restored after a low battery shutdown, each system UPS Rectifier automatically restarts operation, recharges the batteries and the Inverter is automatically restarted without operator intervention. Load is automatically assumed by the inverter without operator intervention.

The power drawn by the load is equally shared between all system UPS during battery operation.

MITSUBISHI ELECTRIC 9800A SERIES UPS