Commissioning - Siemens SIPROTEC 4 7VK61 Manual

Mounting and Commissioning

3.3 Commissioning

3.3 Commissioning
!
WARNING
Warning of dangerous voltages when operating an electrical device
Non-observance of the following measures can result in death, personal injury or substantial prop-
erty damage.
Only qualified people shall work on and around this device. They must be thoroughly familiar with all
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warnings and safety notices in this instruction manual as well as with the applicable safety steps,
safety regulations, and precautionary measures.
Before making any connections, the device must be earthed at the protective conductor terminal.
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Hazardous voltages can exist in the power supply and at the connections to current transformers,
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voltage transformers, and test circuits.
Hazardous voltages can be present in the device even after the power supply voltage has been
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removed (capacitors can still be charged).
After removing voltage from the power supply, wait a minimum of 10 seconds before re-energizing
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the power supply. This wait allows the initial conditions to be firmly established before the device is
re-energized.
The limit values given in Technical Data must not be exceeded, neither during testing nor during
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commissioning.
For tests with a secondary test equipment ensure that no other measurement voltages are connected and the
trip and close commands to the circuit breakers are blocked, unless otherwise specified.
!
DANGER
Hazardous voltages during interruptions in secondary circuits of current transformers
Non-observance 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
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opened.
During the commissioning procedure, switching operations must be carried out. The tests described require
that they can be done without danger. They are accordingly not meant for operational checks.
!
WARNING
Warning of dangers evolving from improper primary tests
Non-observance of the following measure can result in death, personal injury or substantial property
damage.
Primary tests may only be carried out by qualified persons who are familiar with commissioning
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protection systems, with managing power systems and the relevant safety rules and guidelines
(switching, earthing etc.).
208 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018