Siemens MICROMASTER 420 - Manual (Page 23)

Issue 07/04 2 Installation
MICROMASTER 420 Operating Instructions
6SE6400-5AA00-0BP0 23
2.1 General
Installation after a Period of Storage
Following a prolonged period of storage, you must reform the capacitors in the
inverter. The requirements are listed below.
Storage period less than 1 year: No action necessary
Storage period 1 to 2 years Prior to energizing, connect to
voltage for one hour
Storage period 2 to 3 years Prior to energizing, form
according to the curve
Storage period 3 and more years Prior to energizing, form
according to the curve
100
50
75
0,5 1
Voltage
[%]
Time t [h]
2 4 6 8
Fig. 2-1 Forming
2.2 Ambient operating conditions
Temperature
0
20 30 10 40
[°C]
Operating temperature
-10 50 60
75
50
25
100
[%]
Permissible output current
Fig. 2-2 Ambient operating temperature