Siemens 6MD85, Manual

Page: 927 / 1256

•
Parameter:
Operate & flt.rec. blocked
=
no
•
Parameter:
Channel
=
Setting Notes for the Protection Device in Feeder 2
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 2
Parameter:
Channel
= (Stage 2) → circuit-breaker compartment supervision in feeder 2
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 detected
is connected with the signal
>External
current
an external trip initiation for this stage is effective.
•
Parameter:
Operate & flt.rec. blocked
=
no
•
Parameter:
Channel
=
Setting Notes for the Protection Device in the Infeed
The Arc protection function operates with 7 stages.
Stage 1 (busbar-compartment supervision):
•
Parameter:
Operate & flt.rec. blocked
=
no
If an arc is detected in the busbar compartment of the infeed and the thresholds
Threshold I>
and/or
Threshold 3I0>
are exceeded, an operate indication is generated immediately.
•
Parameter:
Channel
=
•
Parameter:
Operating mode
=
current and light
•
Parameter:
Sensor
=
point sensor
•
Parameter:
External trip initiation
=
no
Stage 2 (circuit-breaker compartment supervision):
•
Parameter:
Operate & flt.rec. blocked
=
yes
If an arc is detected in the circuit-breaker compartment of the infeed (light-gray point sensors in
Figure 7-201 ), a pickup indication is generated immediately. The arc is switched off by a superordinate
protection device.
•
Parameter:
Channel
=
•
Parameter:
Operating mode
=
current and light
Protection and Automation Functions
7.29 Arc Protection
SIPROTEC 5, High-Voltage Bay Controller, Manual 927
C53000-G5040-C015-9, Edition 11.2017