4.1 General
433
7UT613/63x Manual
C53000-G1176-C160-2
Humidity
4.1.9 Service Conditions
Limiting temporary (transient) operating tem-
perature
(tested for 96 h)
–20 °C to +70 °C
(legibility of display may be restricted from
+131 °F (+55 °C))
recommended permanent operating tempera-
ture
(acc. to IEC 60255-6)
–5 °C to +55 °C or +23 °F to 131 °F
Limit temperatures for storage –25 °C to +55 °C or –13 °F to +131 °F
Limit temperatures during transport –25 °C to +70 °C or –13 °F to +158 °F
Storage and transport of the device with factory packaging!
Admissible humidity conditions mean value per year ≤ 75 % relative humidity;
on 56 days of the year up to 93 % relative hu-
midity; condensation not permissible!
Humidity; condensation not permissible!
All devices shall 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 environment,
for installation in standard relay rooms and compartments so that proper installation and elec-
tromagnetic compatibility (EMC) is ensured.
In addition the following is recommended:
• All contacts and relays that operate in the same cubicle, cabinet, or relay panel as the nu-
merical 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 earthed at both ends. The shield must be capable of car-
rying the fault currents that could occur.
• Do not withdraw or insert individual modules or boards while the protective device is ener-
gised. When handling the modules or the boards outside of the case, standards for compo-
nents sensitive to electrostatic discharge (Electrostatic Sensitive Devices) must be ob-
served. There is no hazard where installed components are concerned.
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