Primary Switch Mode Inverter
UNV-F
Operation Manual
Page 13 (28)
BHB.UNV-F.D65-1050.HB101
6.2.2 Input
The DC input is protected by a magnetic circuit breaker
(MCB) except the inverter with output-power of 5kVA.
The input is equipped with inrush current limitation to limit
the inrush current to the level of nominal input current. The
input voltage and current is visible on the front side digital
displays.
6.2.3 Output
The unit is generally equipped with an output MCB.
The output is continuously short circuit proof and supplies a
short circuit current of 2 to 3xInom for 2,5 sec.
In case of short circuit the unit switch on every 15sec. again
to check if the short circuit is away.
The inverter can be overcharged for a short time without
switching off. The overload alarm is preset to 10% overload
for 30 sec. It is possible to increase the load to 130% of
nominal load for a short period only.
6.2.4 Dynamic regulation of output voltage
For load steps between 10% and 100% Inom / 100% and
10% Inom the dynamic voltage deviation is < 3 % and is
regulated in < 1,5 ms to static accuracy.
6.2.5 RFI-Suppression
Inverter type UNV fulfills the standards EN 55011/55022
class
.
6.3 Monitoring
6.3.1 Input voltage monitoring
The input voltage is monitored continuously. The actual value
is compared with the programmed monitoring thresholds.
The thresholds can be adjusted with the front keys (see
chapter 6.3.5).
The red LED "Ui<" signalizes inverter input voltage low
(voltage is lower than adjusted threshold Ui<).
The inverter switches off with an adjustable delay time. It
switches on again if the input voltage is in the correct range.
The switch-on voltage is adjustable. The hysteresis and delay
time protects the unit from an oscillation of the automatic
switch off function, e.g. if a discharged battery is unloaded
by inverter switch off.
