Siemens SIPROTEC 4 7VK61 Manual page 214

Mounting and Commissioning
3.3 Commissioning
Because of the manifold applications and various configuration possibilities of the plant it is not possible to
give a detailed description of the necessary test steps. It is important to consider the local conditions and the
protection and plant drawings.
Before starting the circuit tests it is recommended to isolate the circuit breaker of the feeder to be tested at
both ends, i.e. line disconnectors and busbar disconnectors should be open so that the breaker can be oper-
ated without risk.
!
CAUTION
Also for tests on the local circuit breaker of the feeder a trip command to the surrounding circuit breakers
can be issued for the busbar.
Non-observance of the following measure can result in minor personal injury or property damage.
First disable the trip commands to the adjacent (busbar) breakers, e.g. by interrupting the associated
²
control voltages.
Before the breaker is closed again for normal operation the trip command of the feeder protection routed to
the circuit breaker must be disconnected so that the trip command can only be initiated by the breaker failure
protection.
Although the following list does not claim to be complete, it may also contain points which are to be ignored
in the current application.
Auxiliary Contacts of the CB
The circuit breaker auxiliary contact(s) form an essential part of the breaker failure protection system in case
they have been connected to the device. Make sure the correct assignment has been checked.
External Initiation Conditions
If the breaker failure protection can also be started by external protection devices, the external start conditions
are checked. Depending on the device version and the setting of the breaker failure protection, 1-pole or 3-
pole trip are possible. The pole discrepancy check of the device or the actual breaker may lead to 3-pole trip-
ping after 1-pole tripping. Therefore check first how the parameters of the breaker failure protection are set.
Also see Section
In order for the breaker failure protection to be started, a current must flow at least through the monitored
phase and the earth. This may be a secondary injected current.
After every start, the indication
indications.
If only 1-pole initiation is possible:
•
Start by 1-pole trip command of the external protectionL1 :
Binary input functions
tions). Trip command (dependent on settings).
•
Start by 1-pole trip command of the external protectionL2 :
Binary input functions
tions). Trip command (dependent on settings).
•
Start by 1-pole trip command of the external protectionL3 :
Binary input functions
tions). Trip command (dependent on settings).
•
Start by 3-pole trip command of the external protection via all three binary inputs L1, L2 and L3:
Binary input functions
release (in spontaneous or fault indications). 3-pole trip command.
For 3-pole initiation:
214
2.6.2 Setting Notes, addresses 3901 ff.
BF Start (No. 1461) must appear in the spontaneous indications or fault
>BF Start L1 and if necessary >BF release (in spontaneous or fault indica-
>BF Start L2 and if necessary >BF release (in spontaneous or fault indica-
>BF Start L3 and if necessary >BF release (in spontaneous or fault indica-
>BF Start L1 , >BF Start L2 and >BF Start L3 and if necessary >BF
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018