4 Technical Data
4.1.8
Deployment Conditions
The protection device is designed for installation in normal relay rooms and plants, so that electromagnetic immunity
is ensured if installation is done properly.
In addition the following is recommended:
• Contacts and relays operating within the same cabinet or on the same relay board with digital protection equipment,
should be in principle provided with suitable surge suppression components.
• For substations with operating voltages of 100 kV and above, all external cables shall be shielded with a conductive
shield earthed at both ends. For substations with lower operating voltages, no special measures are normally re-
quired.
• For substations with lower operating voltages, no special measures are normally required. When removed, many
components are electrostatically endangered; when handling the EEC standards (standards for Electrostatically
Endangered Components) must be observed. The modules, boards, and device are not endangered when the
device is completely assembled.
4.1.9
Constructive versions
Housing
Dimensions
Housing
in flush mounting housing
In panel surface mounting housing
Degree of protection according to IEC 60529
For surface mounting housing equipment
For the device in flush-mounted housing
Front
Rear
for personell protection
UL-certification conditions
330
7XP20
See dimensional drawings, Section 4.17
Weight
(for maximum number of components)
5 kg (11.02 lb)
9.5 kg (20.94 lb)
IP 51
IP 51
IP 50
IP 2x with closed protection cover
Type 1 for front panel mounting
Surrounding air temperature:
o
tsurr: max. 70
C, normal operation
7SD610 Manual
C53000-G1176-C145-4