Protective Functions; A) Undervoltage Protection; B) Overvoltage Protection - VOLTCRAFT MSW 300 Operating Instructions Manual

8. PROTECTIVE fUNCTIONS

a) Undervoltage protection

The inverter emits an alarm sound when the input voltage drops below a specific value:
12 v inverter: voltage drops below 10.5 v/DC (tolerance ±0.5 v/DC)
24 v inverter: voltage drops below 21.0 v/DC (tolerance ±0.5 v/DC)
If the input voltage drops further, the inverter and the connected consumer are switched
off. This protects, e.g., a car battery that is used to operate the inverter, from harmful deep
discharge.
12 v inverter: voltage drops below 10.0 v/DC (tolerance ±0.5 v/DC)
24 v inverter: voltage drops below 20.0 v/DC (tolerance ±0.5 v/DC)
The "Fault" LED will light up if the inverter recognises undervoltage. In this case, switch
off the inverter via the on/off switch.
If the undervoltage protection is activated, the USB output may not switch off in some circum-
stances. Disconnect thus the load which is connected to the USB output from the inverter after
activating the undervoltage protection.

b) Overvoltage protection

The inverter switches itself and the connected consumer off once the input voltage is too high.
12 v inverter: voltage rises over 15.0 v/DC (tolerance ±0.5 v/DC).
24 v inverter: voltage rises over 30.0 v/DC (tolerance ±0.5 v/DC).
The "Fault" LED will light up if the inverter recognises undervoltage. In this case, switch
off the inverter via the on/off switch. Check the voltage source.
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