3 | Description
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8DJH • Installation and Operating Instructions • Version 11 • 500-8384.9
3.10 Protection and control equipment
The protection equipment and control equipment is designed customer-specifically. The devices
are installed in the low-voltage compartment or in the low-voltage niche.
Details are given in the respective circuit documentation.
3.11 Voltage detecting systems
For voltage detection according to VDE 0682 Part 415 and IEC 61243-5 with the following
voltage detecting systems:
▪ Plug-in HR or LRM voltage indicator
▪ Integrated voltage indicators:
–
VOIS
–
CAPDIS
–
WEGA
A
A
Fig. 16:
Voltage detecting system via capacitive voltage divider (principle)
1
Integrated voltage indicator
2
Plug-in voltage indicator
-C1 Capacitance integrated into the bushing
-C2 Capacitance of the connecting cables and the voltage indicator to earth
U
LE
= U
N
/√3 during rated operation in the three-phase system
U
2
= U
A
= Voltage at the interface (plug-in sockets) of the plug-in voltage indicator or the test
socket of the integrated voltage indicator
3.12 Ready-for-service indicator
The switchgear vessels are filled with insulating gas and are under pressure. The ready-for-
service indicator at the operating front of the panel shows if the gas density in the gas-insulated
switchgear vessel is in order.
▪ Self-monitoring, easy to read
▪ Independent of temperature and external pressure variations
▪ Independent of the site altitude
▪ Only responds to changes in gas density
▪ Option: Signaling switch 1 changeover contact for remote electrical
indication
Summary of Contents for 8DJH
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