APC MGE 6739380EN/JC User Manual download pdf (Page 9)

6739380EN/JC - Page 9

5

I

+–

!

!

O

4

beep...beep...

légend :

off on

5

I

+–

!

!

O

Main operating modes

(1) Except for frequency converters without a

battery

Fig. 11

The voltages depend on the number of

battery cells and the battery

manufacturer. They can be factory set

and are adjustable by the after-sales

support technicians.

An optional electronic board may be

used to continuously measure the

battery temperature and automatically

adjust the voltages.

Parallel UPS systems:

the power drawn by the load is equally

shared between the different UPSs.

Fig. 12

This information is also available via

volt-free changeover contacts for

remote control devices.

In this case, there is a 30 seconds

delay.

Operation with Mains 1 down

(figure 12)

In the event of a Mains 1 failure or

Mains 1 voltage outside specified

tolerance of –10% in amplitude (–15%

optionally), the rectifier-charger stops

and the battery supplies the necessary

backup power to the load via the

inverter. The battery, float-connected

between the rectifier-charger and the

inverter, discharges during this

operating mode.

The green "load protected" light 5 on

the control panel is on.

The user is warned of battery operation

by a buzzer and the orange "load on

battery" light 4 on the control panel.

Note:

In the event of a Mains 1 failure,

frequency converters without a battery

shut down and the load is no longer

supplied.

Normal operation

Mains 1 power is available:

(see figure 11).

The green "load protected" light 5 on

the control panel is on.

The power necessary for the load is

provided by Mains 1 through the

rectifier-charger and the inverter.

The rectifier-charger also supplies the

power to float charge and recharge the

battery (1). The rectifier-charger output

voltage (DC) is regulated for the

different battery types and charging

modes:

◗ vented lead-acid or Ni/Cd batteries:

two different voltages, one for float

charging and one for recharging;

◗ sealed lead-acid batteries: a single

voltage for both charge functions.

mains 1

rectifier-

charger

battery

inverter

load

static switch

mains 2

mains 1

rectifier-

charger

battery

inverter

load

static switch

mains 2

Introduction (cont.)

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