T1X06000GA-N1-R3 datasheet(41/118 Pages) TOSHIBA

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T1000 Series UPS 5.6-6kVA Installation and Operation Manual – 91074-005

12.3 Battery Backup (On batteries)

The following illustration shows power flow during the battery backup mode. When commercial AC power

failures occur, the UPS’s batteries instantly begin supplying DC voltage to the UPS’s main inverter circuit.

This circuit changes (inverts) the DC power into AC power. The AC power is available at the output of the

unit.

This back-up process will continue until the UPS’s battery voltage drops below a specific minimum level.

When this occurs, the batteries will stop supplying power to the load. This minimum level is the rated

minimum voltage (Vmin). The rated battery voltage chart on page 33 shows (Vmin). The battery backup

time and discharge process is explained on page 33.

12.4 EPO (Emergency Power Off) Function

These units are equipped with terminals for receiving an emergency power-off (EPO) command via a

closed-contact switch at a remote location (see Terminal Block Details on Table 7-1, and terminal block

location in Section 7.1). This safety feature enables quick shut-down of the UPS’s AC input breaker, output

and battery circuits.

Usually the emergency power off switch is installed in a central location that is easily accessible to personnel

concerned with the operation of the UPS unit and the load equipment connected to it. The EPO function is

initiated by pressing the switch to the closed (shutdown) position.

The effect of using the EPO switch is the same whether the UPS unit is in AC input mode, battery backup

mode, or the circuit bypass mode. The following figure shows the UPS condition after application of the

EPO switch.

NOTE: EPO operation should be limited to no more than 4 operation per minute, or 24 operations per hour.

Exceeding this duty cycle will overheat the EPO components

FIGURE 12-4: POWER FLOW AFTER AN EPO COMMAND FOR ALL MODELS

Output

Power

Line Filter

Inverter

*Static Switch

(Optional)

Auto-

Transformer

Input

Power

Input

Fuse

Power Flow

Bypass

* Switches are

solid state

devices.

MCCB

Output

Fuse

Batteries

–

Rectifier/

Chopper

Negative Bus

MOV Over-

current

Protection

FIGURE 12-3: POWER FLOW IN BATTERY BACKUP FOR ALL MODELS

Output

Power

Line Filter

*Static Switch

(Optional)

Auto-

Transformer

Input

Power

Input

Fuse

Power Flow

Bypass

* Switches are

solid state

devices.

MCCB

Output

Fuse

Batteries

–

Rectifier/

Chopper

Inverter

Negative Bus

MOV Over-

current

Protection

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