APC 6739380EN/JC user manual Main operating modes, Normal operation, Operation with Mains 1 down

Main operating modes

Normal operation

Mains 1 power is available: (see figure 11).

The green "load protected" light 5 on the control panel is on.

!	!	+ –	I	O
			5
légend :		off	on

Introduction (cont.)

static switch

mains 2

rectifier-

chargerinverter

mains 1 load

battery

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.

Operation with Mains 1 down

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.

(1)Except for frequency converters without a battery

(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.

beep...beep...

! ! + – I O

45

	static switch
mains 2
rectifier-	inverter
charger
mains 1	load
	battery

Fig. 12
This information is also available via	Note:
volt-free changeover contacts for	In the event of a Mains 1 failure,
remote control devices.	frequency converters without a battery
In this case, there is a 30 seconds	shut down and the load is no longer
delay.	supplied.

6739380EN/JC - Page 9