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34006452EN/AC - Page 10
Introduction
Operation with Mains 1 down (figure 12)
Battery time
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 on the control panel is on.
The user is warned of battery operation by a buzzer and the orange "load on battery" light on the control panel.
This information is also available via volt-free changeover contacts for remote control devices.
In this case, there is a 30 seconds delay.
Note:
In the event of a Mains 1 failure, frequency converters without a battery shut down and the load is no longer supplied.
Fig. 12
The available battery time during a Mains 1 outage depends on the:
– rated capacity of the battery;
– power consumed by the load;
– temperature of the battery;
– age of the battery.
The specified battery time corresponds to a minimum duration at full rated load.
The actual backup time can therefore be greater if the system operates below its full rated load during the Mains 1 outage.
Operation on battery power can be extended beyond the specified time by reducing the load power consumption
(by disconnecting non-critical loads).
A "low battery shutdown" warning signal is sent via volt-free changeover contacts for remote control devices when the battery
voltage reaches a level slightly above the minimum level. This signal warns the user of the imminent end of battery power.
On the device itself, the buzzer beeps increasingly rapidly and loudly.
Battery power stops when the voltage supplied by the battery reaches the voltage minimum (340 V). This results in inverter
shutdown and transfer of the load without interruption to Mains 2. The red "load not protected" light on the control
panel is on.
If Mains 2 also fails, the load is no longer supplied. Normally, the inverter shuts down when the time on the battery power
exceeds three times the specified backup time.
Note:
As an optional function (battery time estimator), the "low battery shutdown" warning signal can be sent with an adjustable time
delay prior to the effective end of battery power.
5
4
5
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+
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O
4
beep...beep...
mains 1
rectifier-
charger
battery
inverter
load
static switch
mains 2
2
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+
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O
2
beep...beep...