Climatic Stress Tests - Siemens siprotec 7SA522 User Manual

10.1.7 Climatic Stress Tests

Ambient Tempera-
tures
Humidity
10.1.8 Service Conditions
7SA522 Manual
C53000-G1176-C119-2
Standards:
– recommended operating temperature –5 °C to +55 °C
– recommended operating temperature –5 °C to +40 °C
– limiting temporary (transient)
operating temperature
– limiting temperature during storage
– limiting temperature during transport
Storage and transport of the device with factory packaging!
Permissible humidity
It is recommended that all devices be installed such that they are not exposed to direct
sunlight, nor subject to large fluctuations in temperature that may cause condensation
to occur.
The device is designed for use in an industrial environment or an electrical utility en-
vironment, for installation in standard relay rooms and compartments so that proper
installation and electromagnetic compatibility (EMC) is ensured. In addition, the follow-
ing are recommended:
• All contactors and relays that operate in the same cubicle, cabinet, or relay panel
as the numerical protective device should, as a rule, be equipped with suitable
surge suppression components.
• For substations with operating voltages of 100 kV and above, all external cables
should be shielded with a conductive shield grounded at both ends. The shield must
be capable of carrying the fault currents that could occur. For substations with lower
operating voltages, no special measures are normally required.
• Do not withdraw or insert individual modules or boards while the protective device
is energized. When handling the modules or the boards outside of the case, stand-
ards for components sensitive to electrostatic discharge (ESD) must be observed.
The modules, boards, and device are not endangered when the device is complete-
ly assembled.
IEC 60255–6
(+23 °F to +131 °F)
when max. half of the inputs and outputs are subjected
to the max. permissible values
(+23 °F to +104 °F)
when all inputs and outputs are subjected
to the max. permissible values
–20 °C to +70 °C
(–4 °F to 158 °F)
in quiescent state, i.e. no pick-up and no
indications
–25 °C to +55 °C (–13 °F to 131 °F)
–25 °C to +70 °C (–13 °F to 158 °F)
mean value p. year ≤75 % relative humidity
on 56 days per year up to 93 % relative
humidity; condensation not permissible!
Technical Data
Visibility of display
may be impaired
above +55 °C/130 °F
10-9