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Technical Data
4.1 General Device Data
4.1.8
Service conditions
The protection device is designed for installation in normal relay rooms and plants so that electromagnetic
compatibility (EMC) is ensured if installation is done properly.
We also recommend:
• All contacts and relays that operate in the same cubicle, cabinet, or relay panel as the numerical protective
device should always be equipped with proper surge suppression components.
• For substations with operating voltages of 100 kV and higher, all external cables should be shielded with a
conductive shield grounded at both ends. No special measures are normally required in a medium-voltage
substation.
• Do not withdraw or insert individual modules or boards while the protective device is energized. When han-
dling modules outside the case, the standards for components sensitive to electrostatic discharge (Electro-
statically Sensitive Devices) must be observed. They are not endangered inside the case.
• Only temperature sensors with 3-wire connection and shielded connection cables may be connected.
Connect the cable shield as short as possible at the terminal D-14 designed for this purpose.
4.1.9
Constructive Design
Case
Dimensions
Device
7SK80**-*B
7SK80**-*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
358
Case
for panel surface mounting
for panel flush mounting
7XP20
see dimensional drawings, Section 4.24
IP 50
Front IP 51
Rear IP 50
IP 2x for current terminal
IP 1x for voltage terminal
2
E50417-G1140-C344-A5, Release date 11.2012
Size
Weight
1
/
4.5 kg (9.9 lb)
6
1
/
4 kg (8.8 lb)
6
SIPROTEC, 7SK80, Manual
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