Siemens SIPROTEC 7SS523 V3.2 Manual page 54

Getting Started
3.4 Electrical Checks
38
Make sure that the operating conditions are compliant with VDE0100 and VDE0105
Part 1.
The devices should have been in the final operating area for a minimum of two hours
before the power source is first applied. This time allows the device to attain temper-
ature equilibrium, and dampness and condensation to be avoided.
Warning!
The following inspection steps are performed in the presence of dangerous voltages.
Only appropriately qualified personnel familiar with and adhering to safety require-
ments and precautionary measures may perform these steps.
For a first electrical check of the 7SS52 V4, it is sufficient to ensure safe earthing and
to apply the auxiliary voltage:
Connect the earthing of the devices with the protective earthing of the location. In
the version for cubicle mounting or panel flush mounting, the earthing screws are
on the back of the devices, in the version for panel surface mounting a terminal is
provided for earthing.
Connect the auxiliary voltage to the device inputs via a switch or a miniature circuit
breaker. Verify that the supply voltage has the correct magnitude and polarity. Refer
to the overview diagrams in the Chapter A.3, page 334.
Close the protective switch or miniature circuit breaker to apply the auxiliary volt-
age.
The green LED on the front panel must light after no more than 0.5 s, and the red
LED must be off after no more than 10 s.
After no more than 15 s the startup indications (showing the complete ordering
number, the implemented firmware version and the boot system) disappear, and
the default display appears. Depending on the default marshalling, some LEDs may
already be on.
7SS52 V4 Manual
C53000-G1176-C182-1