Lenze 9228E - Manual (Page 78)

76
Overload chart for f chop = 16kHz
Parameter I1/Irated Parameter I2/Irated
Example B
given:
f chop = 16kHz
overload I
2
= 0,8 . I
rated
overload I
1
= 3,4 . I
rated
required: maximum duration of the overoad t 1
result: t
1
= 7s
OUE Overvoltage
If the DC bus voltage exceeds 750 V due to :
•
excessive mains voltage or
•
excessive brake energy,
the fault OUE "overvoltage" is displayed. In the case of excessive
brake energy, the deceleration times T
if
and (or) T
QSP
must be
increased. If necessary, install an external brake resistor.
OH1 Overtemperature supply module
The temperature monitoring on the supply module detects
overtemperatures of the heat sink, the mains input bridge, the
brake chopper and the internal brake resistors. Possible reasons
are:
•
overload of the supply module (supply module power < total
axis module power).
•
blower defective or insufficient
•
ambient temperature > 45°C.
OH2 Overtemperature heat sink axis module
The heat sink is monitored by a thermal contact. If the fault OH2 is
displayed, either the ventilation is not sufficient or defective, or the
ambient temperature is > 45°C. Fault reset is only possible after the
heat sink temperature has been reduced below 45°C.