Commissioning
263
7SS52 V4 Manual
C53000-G1176-C182-3
7.3.1 How to Proceed
The following sections lead you through the essential steps of the commissioning.
We recommend to commission the protection system and all its functions centrally
with DIGSI.
First, put all feeders out of operation (see Chapter 6.4, page 244). Then commission
the bay units one by one.
In DIGSIthe configuration of the bus bars, the bay types and the transformer data have
to be determined in such a way, that they match the plant data.
Make the allocations of the binary inputs, relays and LEDs of the central unit ac-
cording to the settings of your customer.
Check the current transformer circuits. The check includes the correct wiring, the
polarity the transformation ratio and the position of the earthing.
Check the isolator replica. The check includes the correct acquisition of the isolator
feedbacks in the bay units and the central unit as well as the correspondence with
the plant configuration.
It makes sense to perform this check of the binary inputs and the LEDs of the bay
units and the central unit (see Chapter 7.3.3, page 268). The check is made in con-
nection with the feeder protection devices, if possible. Check the functions circuit
breaker failure protection, releases and additional functions.
With the circuit breaker check carry out a function control of the TRIP command and
transfer trip contacts of the bay units (see Chapter 6.3.4, page 235). With the circuit
breaker check a 1 or 3 pole circuit breaker TRIP command check at the bay units
is possible. It is a prerequisite that the set threshold for the feeder current I> MAN
TRIP (6316/CU) is not exceeded. Furthermore the functions “CB Test
L1,L2,L3” (FNo. 7636, 7637, 7638/BU) must be allocated to the trip con-
tacts. To test the annunciation “transfer TRIP command” allocate, if necessary,
one of these functions to the corresponding output relay.
Carry out a function check of the information of the central unit (see Chapter 7.3.4,
page 273).
Note
This manual cannot take into account all possible aspects of the commissioning pro-
cedure. The responsibility for a successful commissioning lies with the person who
performs it.
Note
A prerequisite for this is that the plant configuration was made according to Chapter
4.3, page 49.
www . ElectricalPartManuals . com
To Next Page
Loading...
Need help?
General
