Application Example For Arc Protection With Point Sensors In Operating Mode: Light Only; Description - Siemens 6MD85 Manual

Siprotec 5 high-voltage bay controller

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Table of Contents

Protection and Automation Functions

7.29 Arc Protection

Application Example for Arc Protection with Point Sensors in Operating Mode:

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

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.

Layout and Connection of the Optical Point Sensors (Operating Mode = Light only)

SIPROTEC 5, High-Voltage Bay Controller, Manual

C53000-G5040-C015-9, Edition 11.2017