Siemens siprotec 7SA6, Manual

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Installation and Commissioning
8-47
7SA6 Manual
C53000-G1176-C156-2
8.3 Commissioning
When testing the device with secondary test equipment, make sure that no other
measurement quantities are connected and that the trip and close commands to the
circuit breakers and other primary switches are disconnected from the device unless
expressly stated.
For the commissioning switching operations have to be carried out. A prerequisite for
the prescribed tests is that these switching operations can be executed without dan-
ger. They are accordingly not meant for operational checks.
Warning!
Hazardous voltages are present in this electrical equipment during operation. Non–
observance of the safety rules can result in severe personal injury or property dam-
age.
Only qualified personnel shall work on and around this equipment after becoming thor-
oughly familiar with all warnings and safety notices of this manual as well as with the
applicable safety regulations.
Particular attention must be drawn to the following:
•
The earthing screw of the device must be connected solidly to the protective earth
conductor before any other electrical connection is made.
•
Hazardous voltages can be present on all circuits and components connected to the
supply voltage or to the measuring and test quantities.
•
Hazardous voltages can be present in the device even after disconnection of the
supply voltage (storage capacitors!).
•
Wait for at least 10 s after having disconnected the supply voltage before you re-
apply the voltage in order to achieve defined initial conditions.
•
The limit values stated in the Technical Data must not be exceeded at all, not even
during testing and commissioning.
DANGER!
Current transformer secondary circuits must have been short-circuited before
the current leads to the device are disconnected!
If test switches are installed that automatically short-circuit the current transformer
secondary circuits, it is sufficient to place them into the “Test” position provided the
short-circuit functions has been previously tested.
Warning!
Primary tests must only be carried out by qualified personnel, who are familiar with the
commissioning of protection systems, the operation of the plant and the safety rules
and regulations (switching, earthing, etc.).