Internal Monitoring; Mains Power Monitoring; Monitoring Intermediate Circuit Voltage; Output Overvoltage Protection - Eltek MultiCharger 1500 Description And Operating Instructions

3

Internal monitoring

The MultiCharger 1500 has several internal monitoring functions that ensure that the charger
works reliably. These are individually described in the following sub-sections.
3.1

Mains power monitoring

If the mains voltage drops below 85V, the MultiCharger 1500 signals a fault and switches off. The
message 'Mains error' appears on the LCD display.
If the mains voltage rises above 90V, the MultiCharger 1500 can be made ready for use by
pressing button 1 (On/Off).
3.2

Monitoring intermediate circuit voltage

Intermediate circuit voltage is monitored both against dropping too low and rising too high. If either
limit (350V and 430V respectively) is passed, the MultiCharger 1500 signals a fault and switches
itself off to the unlocked position. The message 'PFC error' appears on the LCD display and the
red LED comes on. If either of the limits is exceeded again after restarting the MultiCharger 1500
switches itself off to the locked position.
3.3

Output overvoltage protection

For safety reasons output voltage is monitored for excessive levels in two totally independent
ways.
The controller-independent hardware monitoring threshold for overvoltage output is fixed at 16V or
32V respectively. This monitors internal output voltage. If internal voltage goes over this threshold,
the MultiCharger 1500 signals a fault and switches itself off to the locked position. The message
'OVP error' appears in the LCD display and the red LED comes on.
The digital monitoring threshold for overvoltage output is adjustable, while the default setting for
this is also 16V or 32V respectively. If output voltage goes over this threshold, the MultiCharger
1500 signals a fault and switches itself off to the locked position. The message 'Overvoltage'
appears in the LCD display and the red LED comes on.
3.4

Output undervoltage protection

The monitoring threshold for output undervoltage is 7V or 14V respectively.
If output voltage drops below this threshold, the MultiCharger 1500 signals a fault and switches
itself off to the locked position. The message 'Voltage too low' appears on the LCD display and the
red LED comes on.
3.5

Excessive output current

If, due to an internal fault in the appliance, output current exceeds the prevailing current limit level
by more than 25%, the MultiCharger 1500 signals a fault and switches itself off to the locked
position. The message 'Overcurrent' appears in the LCD display and the red LED comes on.
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