Humidity
Admissible humidity Annual average ≤ 75 % relative humidity;
On 56 days of the year up to 93% relative humidity. Condensa-
tion must be avoided in operation!
It is recommended that all devices be installed so that they are not exposed to direct sunlight nor subject to large fluctu-
ations in temperature that may cause condensation to occur.
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 equip-
ment, 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
required.
•
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.
Construction
Case
7XP20
Dimensions See dimensional drawings, Section 4.10 Dimensions
Device Case Size Weight (for
maximum number
of components)
7VK610
in flush mounting housing
1
/
3
5 kg
in surface mounting housing
1
/
3
9,5 kg
7VK611
in flush mounting housing
1
/
2
6 kg
in surface mounting housing
1
/
2
11 kg
Protection class acc. to IEC 60529
For surface mounting housing equipment IP 51
For equipment of the flush-mount housing
Front IP 51
Rear IP 50
For personnel protection IP 2x with cover in place
4.1.8
4.1.9
Technical Data
4.1 General
234 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
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