Service Conditions; Design - Siemens SIPROTEC 7SD80 Manual

Humidity
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.
4.1.8

Service Conditions

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 is recommended:
• All contacts 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. For substations with lower operating voltages, no special mea-
sures are normally required.
• Do not withdraw or insert individual modules or boards while the protective device is energized. In with-
drawn condition, some components are electrostatically endangered; during handling the ESD standards
(for Electrostatic Sensitive Devices) must be observed. They are not endangered when inserted into the
case.
4.1.9

Design

Case
Dimensions
Device
7SD80**-*B
7SD80**-*E
Protection type acc. to IEC 60529
For equipment in the surface-mounting case
For equipment in flush mounting case
for operator protection
Degree of pollution, IEC 60255-27
SIPROTEC, 7SD80, Manual
E50417-G1140-C474-A1, Release date 09.2011
Mean value per year ≤ 75 % relative humidity;
on 56 days of the year up to 93 % relative humidity; con-
densation must be avoided!
Case
for panel surface mounting
for panel flush mounting
IP 50
Front IP 51
Rear IP 50
IP 2x for current terminal
IP 1x for voltage terminal
2
7XP20
see dimensional drawings, Section 4.19
1
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1
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Technical Data
4.1 General Device Data
Size Weight
4.5 kg (9.9 lb)
6
4 kg (8.8 lb)
6
291