Initial Inspections
3-13
7SJ63 Manual
C53000-G1140-C120-1
3.4
Storage
If the device is to be stored, note:
SIPROTEC
®
4 devices and associated assemblies should be stored in a dry and clean
place, with a maximum temperature range of [–25° C to +55° C], or [–12° F to 131° F].
See Sub-section 10.1.7 under Technical Data. To avoid premature aging of the elec-
trolyte capacitors in the power supply, a temperature range of [+10° C to +35° C], or
[50° F to 95° F], is recommended for storage.
The relative humidity must not lead to condensation or ice buildup.
After extended storage, the power supply of the device should be energized for one or
two days to regenerate the electrolytic capacitors in the power supply. This procedure
should also be done prior to the device being put in-service. Under extreme climatic
conditions (tropics), preheating is achieved at the same time, and condensation is pre-
vented.
After long storage, power should not be applied until the device has been in the oper-
ating area for a minimum of two hours. This time period allows the device to attain tem-
perature equilibrium, and prevents dampness and condensation from occurring.
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