Commissioning - Siemens SIPROTEC 4 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 grounded at the protective conductor terminal.
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Hazardous voltages can exist in all switchgear components connected to the power supply and to
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measurement 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 switching off the auxiliary voltage, wait a minimum of 10 seconds before reconnecting this
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voltage so that steady conditions can be established.
The limit values given in Technical Data (Chapter 4) must not be exceeded, neither during testing nor
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during commissioning.
When testing the device with secondary test equipment, make sure that no other measurement quantities are
connected and that the trip and close circuits to the circuit breakers and other primary switches are discon-
nected from the device.
!
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.
Switching operations have to be carried out during commissioning. A prerequisite for the prescribed tests is
that these switching operations can be executed without danger. They are accordingly not intended for opera-
tional checks.
!
WARNING
Warning of dangers evolving from improper primary tests
Non-observance of the following measures can result in death, personal injury or substantial prop-
erty damage.
Primary tests are only allowed to be carried out by qualified personnel, who are familiar with the
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commissioning of protection systems, the operation of the plant and the safety rules and regulations
(switching, grounding, etc.).
332 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017