Siemens 6MD85, Manual

Page: 924 / 1256

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NOTE
This application example requires the connection of several optical point sensors to a single protection
device. It must be considered that the number of arc-protection modules that are connected to the device
depends on the hardware configuration of the device.
When using modular devices, a maximum of 15 sensors can be connected. If you use non-modular devices,
a maximum of 6 sensors (3 sensors per module) can be connected.
Application and Setting Notes
General Notes
•
Connect the optical point sensors from the busbar compartment, the circuit-breaker compartment, and
the cable-connection compartment of feeders 1 and 2 to the protection device in the infeed. Arcs in the
busbar compartment, the circuit-breaker compartment and the cable-connection compartment of
feeders 1 and 2 are detected and cleared by the device in the infeed.
•
Connect an optical point sensor from the busbar compartment in the infeed to the protection device in
the infeed. Arcs in the busbar compartment of the infeed are cleared selectively by the circuit breaker in
the infeed.
Setting Notes for the Protection Device in the Infeed
The Arc protection function operates with 7 stages.
Set the parameters of the stages as follows:
•
Parameter:
Operating mode
=
current and light
(applies to all stages)
•
Parameter:
Sensor
=
point sensor
(applies to all stages)
•
Parameter:
External trip initiation
=
no
(applies to all stages)
•
Parameter:
Channel
=
Arc mod. 1 channel 1
(Stage 1) → Busbar compartment supervision in
feeder 1
Parameter:
Channel
=
Arc mod. 1 channel 2
(Stage 2) → Circuit-breaker compartment supervision
in feeder 1
Parameter:
Channel
=
Arc mod. 1 channel 3
(Stage 3) → Cable-connection compartment supervi-
sion in feeder 1
Parameter:
Channel
=
Arc mod. 2 channel 1
(Stage 4) → Busbar compartment supervision in
feeder 2
Parameter:
Channel
=
Arc mod. 2 channel 2
(Stage 5) → Circuit-breaker compartment supervision
in feeder 2
Parameter:
Channel
=
Arc mod. 2 channel 3
(Stage 6) → Cable-connection compartment supervi-
sion in feeder 2
Parameter:
Channel
=
Arc mod. 3 channel 1
(Stage 7) → Busbar compartment supervision in the
infeed
You can find more information about the settings of the parameters
Threshold I>
and
Threshold 3I0>
in chapter 7.29.4 Application and Setting Notes – General Settings .
Application Example for Arc Protection with Point Sensors via External Trip
Initiation
Description
Overview
The example describes the Arc protection function in a medium-voltage switchgear with one infeed and
2 feeders. The stages of the Arc protection function are triggered by
External trip initiation
.
7.29.9.2
7.29.10
7.29.10.1
Protection and Automation Functions
7.29 Arc Protection
924 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017