Siemens SIPROTEC 5 Manual page 229

!
CAUTION
You must ground the device at the protective grounding terminal before making the connections. There
may be hazardous voltages in all switching components linked to the power supply and to measurand or
test quantities. There may be hazardous voltages in the device (capacitor storage of the current supply)
even after disconnecting the supply voltage.
Noncompliance with the safety notes will result in death or severe injuries.
To reach the defined initial conditions after switching off the auxiliary voltage, wait at least 10 s
²
before restarting the auxiliary voltage.
Do not exceed the limiting values indicated under Technical Data of the Device manuals, even during
²
testing and commissioning.
!
DANGER
Hazardous voltages during breaks in secondary circuits of current transformers
Noncompliance with the safety notes will result in death or severe injuries.
Short-circuit the secondary connections of the current transformer before the electrical lines to the
²
device are disconnected.
If there is a test switch which short-circuits the current-transformer secondary line automatically, it is
²
sufficient to set this switch to the Test position, provided you checked the short-circuiting device
beforehand.
NOTICE
Pay attention when wiring the safety cabinet to the system
Noncompliance with the safety notes will result in material damage.
Before the 1st test, wire the safety cabinet to the system. You must check the wiring of the connec-
²
tions to the primary system.
Test all connections, including the polarity of transformers. In voltage transformers with broken-delta
²
winding make sure that they are not short-circuited.
Activate the auxiliary voltage of the device.
²
Establish an online connection to the device. You can verify the signals at the binary inputs under the
²
Test suite → Wiring menu item.
Compare the entries under Binary inputs, Binary outputs and LEDs with the system status.
²
Check whether signaling contacts are connected to the correct binary input.
²
Check the proper functioning of the voltage-transformer circuit breaker and the wiring on the corre-
²
sponding binary input.
Check the correct wiring of blocking and release inputs.
²
Click the Binary outputs menu item and check the status of the entries. Apart from those in closed
²
circuits, the contacts are open.
To check the connection to the switching device, activate a specific binary output. Proceed very carefully
²
here.
SIPROTEC 5, Operation, Manual
C53000-G5040-C003-C, Edition 08.2020
Commissioning
9.5 Primary Tests
229