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4 Technical Data
Humidity
4.1.8
Service Conditions
4.1.9
Certifications
UL listing
UL recognition
404
– Recommended permanent operating
temperature (acc. IEC 60255–6)
Visability of display may be impaired above +131 °F
– Limiting temperature during
permanent storage
– Limiting temperature during
transport
STORE AND TRANSPORT THE DEVICE WITH FACTORY PACKAGING.
Permissible Humidity
Siemens recommends 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 protective device is designed for use in an industrial environment and an electrical
utility environment. Proper installation procedures should be followed to ensure
electromagnetic compatibility (EMC). In addition, the following 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 while the protective device is
energized. When handling the modules or the device outside of the case, standards
for components sensitive to electrostatic discharge (ESD) must be observed. The
modules and device are not endangered when inserted into the case.
Models with threaded terminals
Models with plug–in terminals
+23 °F to +131 °F or –5 °C to +55 °C
–13 °F to +131 °F or –25 °C to +55 °C
–13 °F to +158 °F or –25 °C to +70 °C
Mean value per year ≤75% relative
humidity, on 56 days of the year up to 93%
relative humidity.
CONDENSATION MUST BE AVOIDED
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7UM62
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B
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7UM62
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E
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7UM62
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D
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7UM62 Manual
C53000-G1176-C149-3
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