Siemens 6MD86 - Application Example for Arc Protection with Point Sensors in Operating Mode: Light Only; Description

Application Example for Arc Protection with Point Sensors in Operating Mode:
Light Only
Description
Overview
The example describes the Arc protection function in a medium-voltage switchgear with one infeed and
2 feeders. The Arc protection function operates with the Operating mode = light only.
The following items are considered in the example below:
•
Positioning the optical point sensors in the switchgear
•
Connecting the optical point sensors to the protection devices in the feeders and the infeed
•
Number of necessary stages of the functions in the protection devices of the feeders and the infeed
•
Setting notes about the selected parameters in the stages of the function
The following figure shows the arrangement and the connection of the optical point sensors:
[dw_arcprot-light-only, 2, en_US]
Figure 7-199
Layout and Connection of the Optical Point Sensors (Operating Mode = Light only)
For this example, the following is assumed:
•
The circuit breaker of the infeed must be switched off. This ensures that the arcs in the busbar compart-
ments of the infeed and the feeders or in the circuit-breaker compartment of the feeders are off.
Install the optical point sensors in the busbar compartments (BB compartment) of the infeed and feeders.
Install additional optical point sensors in the circuit-breaker compartment (CB compartment) of the
feeders. Connect all optical point sensors to the protection device of the infeed.
7.29.8
7.29.8.1
Protection and Automation Functions
7.29 Arc Protection
920 SIPROTEC 5, High-Voltage Bay Controller, Manual
C53000-G5040-C015-9, Edition 11.2017