Mounting and Commissioning
3.3 Commissioning
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
415
WARNING!
Warning of dangers evolving from improper primary tests
Non-observance of the following measures can result in death, personal injury or substantial property damage.
Primary test may only be carried out by qualified personnel, who are familiar with the commissioning of protec-
tion systems, the operation of the plant and the safety rules and regulations (switching, earthing, etc.).
Safety Instructions
All relevant safety rules and regulations (e.g. VDE 105, VBG4 or comparable national regulations) must be
complied with.
Before undertaking any work, observe the following „5 safety rules“:
• De-energize
• Secure against reswitching on
• Establish absence of voltage
• Earth and short circuit
• Cover or fence in live parts in the vicinity
In addition the following must be observed:
• Before making any connections, the device must be earthed at the protective conductor terminal.
• Hazardous voltages can exist in all switchgear components connected to the power supply and to measure-
ment and test circuits.
• Hazardous voltages can be present in the device even after the power supply voltage has been removed
(capacitors can still be charged).
• After removing voltage from the power supply, wait a minimum of 10 seconds before reenergizing the power
supply. This allows defined initial conditions when the device is re-energized.
• The limit values specified in the Technical Data (section 4.1) must not be exceeded, not even during testing
and commissioning.
DANGER!
Hazardous voltages during interruptions in secondary circuits of current transformers
Nonobservance of the following measure will result in death, severe personal injury or substantial property
damage.
Short-circuit the current transformer secondary circuits before current connections to the device are opened.
If test switches are installed that automatically short-circuit the current transformer secondary circuits it is suf-
ficient to place them into the „Test“ position provided the short-circuit functions have been previously tested.
All secondary test equipment should be removed and the measurement voltages connected. The operational
preparations must be completed. Primary tests are performed with the generator.
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