Climatic Stress Tests; Service Conditions - Siemens siprotec 7SA6 User Manual

Technical Data

10.1.7 Climatic Stress Tests

Ambient
Temperatures
Humidity

10.1.8 Service Conditions

10-10
– Continuous shock
IEC 60255–21–2, class 1
IEC 60068–2–29
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 are installed such that they are not exposed to di-
rect sunlight, nor subject to large fluctuations in temperature that may cause conden-
sation 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.
half-sine shaped
acceleration 10 g; duration 16 ms;
1000 shocks in each direction of
3 orthogonal axes
IEC 60255–6
(+23 °F to +131 °F)
if max. half of the inputs and outputs are subjected
to the max. permissible values
(+23 °F to +104 °F)
if 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!
Visibility of display
may be impaired
above +55 °C/130 °F
7SA6 Manual
C53000-G1176-C133-1