TEBEVERT III INVERTER SYSTEM (120 VDC)
07.11.2011
54
028-0009-006
7.2.2 MONITORING THE OUTPUT VOLTAGE
The output voltage supplied by the inverter is also monitored. If the
output volta ge is within the ra nge 120
10% (108V ... 132V), this ta rge te d
state is indicated by an LED on the front panel. If it is outside this range,
an LED indicates the fault. If the output voltage exceeds the upper limit,
the inverter is blocked and switches to a self-holding mode. The self-
holding mode can be cancelled by switching the unit on again at the main
ON/OFF switch.
7.2.3 MONITORING THE TEMPERATURE
The temperature is monitored in three phases.
If the cooling air temperature reaches a value of approximately 45°C, the
fan inside the inverter automatically switches on.
If the temperature exceeds a value of approximately 85°C, the inverter
switches off because of over temperature.
The air temperature inside the housing is also measured. The unit also
switches off when this temperature reaches approximately 70°C. The high
interior temperature may be due to high ambient temperatures or
obstruction of the air supply. The shut-down of the inverter due to over
temperature is indicated by the LED "FAULT" on the front panel.
7.2.4 OVERLOAD BEHAVIOR
The inverter is designed to withstand short-term overloading. In cases of
overloading, an LED on the front panel lights up. 200% of the nominal
effective current can be supplied for a maximum of 1.2 seconds (i.e.
double the rated power). If the overload still exists after 1.2 seconds, the
current is reduced to 1.3 times the rated value with a resultant reduction
in the output voltage. If the overload situation still persists after another
41 seconds, the power unit of the inverter goes off. The inverter can only
restart if, after the inverter has been switched off with the main switch, all
LED´s on the front panel are extinguished and the inverter is switched on
again.
When operating the inverter with a SBS (this is always the case for this
inverter system), the SBS recognizes the overload. If the inverter output
voltage lies outside the tolerance range, the SBS will switch the current
mains supply through to the load equipment.
