Application And Setting Notes - Siemens 7SJ82 Manual

Protection and Automation Functions
6.10 Arc Protection
NOTE
i
i
If the Arc protection function operates via the External trip initiation, only 3 optical point
sensors are required per feeder protection device in order to detect the arcs (only one arc-protection
module).
The number of GOOSE messages is not limited. Therefore, the number of feeders is not limited, and the
protection of complex systems is feasible.
6.10.10.2

Application and Setting Notes

General Notes:
•
Install the optical point sensors in the busbar compartment, the circuit-breaker compartment, and the
cable-connection compartment of the feeders and the infeed to the respective protection devices.
•
Arcs in the busbar compartment and the circuit-breaker compartment of the feeders must be switched
off by the protection device in the infeed. To do this, the protection devices in the feeder device must
send the indication
interface, or IEC 61850 GOOSE.
The protection device in the infeed evaluates the current. If the measured current exceeds the
Threshold I> and/or Threshold 3I0> threshold values, the protection device in the infeed switches
off faults on the busbar and the circuit-breaker compartment of the feeders.
Connect the signals over 4 stages, using the external trip initiation or a CFC chart.
•
Arcs in the cable-connection compartment of the feeders are switched off locally. The protection device
in the infeed evaluates the current. If the measured current exceeds the threshold values Threshold
I> and/or Threshold 3I0>, the
the feeders. If, at the same time, an optical sensor in a cable-connection compartment detects light, the
protection device trips in the corresponding feeder.
Setting Notes for the Protection Device in Feeder 1
The Arc protection function operates with 3 stages.
Stage 1 and 2 (supervision of busbar compartment and circuit-breaker compartment):
Set the parameters of the stages as follows:
•
Parameter: Operating mode = light only
•
Parameter: Sensor = point sensor
•
Parameter: External trip initiation = no
•
Parameter: Operate & flt.rec. blocked = yes
•
Parameter: Channel = (Stage 1) → busbar-compartment supervision in feeder 1
Parameter: Channel = (Stage 2) → circuit-breaker compartment supervision in feeder 1
Stage 3 (supervision of cable-connection compartment):
Set the parameters of the stage as follows:
•
Parameter: Operating mode = current and light
•
Parameter: Sensor = point sensor
•
Parameter: External trip initiation = current
The protection device in the infeed evaluates the current. If the measured current exceeds the threshold
values Threshold I> and/or Threshold 3I0>, the protection device in the infeed returns the indica-
tion Current detected to the protection device in the feeder.
Only if the indication in the feeder device
current an external trip initiation for this stage is effective.
514
Light detected to the infeed device. Use the binary inputs/outputs, a protection
Current detected indication is sent to the protection devices in
Current detected is connected with the signal >External
SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017