page 60 / 75 0MNA080A55-GB REV 01
Recharging at two voltage levels (configurable):
This type of recharging is effected with two current levels (EN 50272-2); the first phase comprises rapid charging
(U1) with limited current, while in the second phase charging is with float voltage (U2).
N.B.: this type of recharging may be configured on site and is mainly used for special type batteries such
as open vase and NiCd.
For batteries of type 1, 2 or 3, press key 2 from menu
a to change from cyclical charge to charging at two levels
Ac= xxx, Vbat.: min=xxx, ch xxx, max=xxx
Bat.type(1) 2=Cycl.->ON ,
For batteries of type 0, press key 2 from menu
b to change from cyclical charge to charging at two levels
Ac= xxx, Vbat.: min=xxx, ch xxx, max=xxx
Bat.type(0) 2=Cy., 3-/4+, 5-/6+, 7-/8+
Use keys 3,4; 5,6 and 7,8 to set the values
5.4.5.6 PRE-ALARM
Press the following sequence of keys to access the menu: 3, 5, 436215, 4
(315Vmin,336Vp,378Vs) Pre-alarm 5 min.
ADJUSTMENT: 7=-, 8=+
Press key 1 to exit the menu. The menu above will appear with batteries of type 1, 2 or 3.
Voltage values Vmin, Vp and Vs are not fixed values but are a function of the battery discharge current, [Vp=
Vmin+5V+10*(battery current[A]/battery capacity[Ah]).
Keys 7 and 8 can be used to decrease or increase the time to activate the pre-alarm before the system blocks due to
end of battery discharge. Variations in the field of 1 minute are possible from 2 to 254 minutes.
The pre-alarm signal is activated when the remaining calculated time is lower than the pre-alarm value set or when
the battery voltage is lower than the pre-alarm voltage value Vp.
Pre-allarm
A wide safety margin must be provided for the use of the pre-alarm function, since the expected backup
time may not provide for increases of absorption by the output load, and may not make allowance for
sudden, unexpected battery defects.
Value se
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