# \#protection-systems
**URL:** https://community.opal-rt.com/tag/protection-systems/66.md
[Latest](https://community.opal-rt.com/latest.md) · [Categories](https://community.opal-rt.com/categories.md) · [Tags](https://community.opal-rt.com/tags.md)
---
## [Line Distance Protection with POTT including TestView Project](https://community.opal-rt.com/t/line-distance-protection-with-pott-including-testview-project/86)
**Author:** [@Party\_Patel](https://community.opal-rt.com/u/Party_Patel)\
**Replies:** 1\
**Last updated:** [July 16, 2026, 10:00am UTC](https://community.opal-rt.com/t/line-distance-protection-with-pott-including-testview-project/86 "2026-07-16T10:00:00Z")
Overview A distance protection example with permissive overreach transfer trip logic and an included TestView automation project for repeatable relay testing. This example brings protection engineering into the starter …
---
## [Distance Protection Relay](https://community.opal-rt.com/t/distance-protection-relay/102)
**Author:** [@Parija](https://community.opal-rt.com/u/Parija)\
**Replies:** 1\
**Last updated:** [July 12, 2026, 4:00pm UTC](https://community.opal-rt.com/t/distance-protection-relay/102 "2026-07-12T16:00:00Z")
Overview MHO-type distance protection on parallel 735-kV transmission lines with zone logic, fault studies, and permissive trip signaling. This example demonstrates distance protection on high-voltage transmission lines…
---
## [Kundur 4-Machine Power System](https://community.opal-rt.com/t/kundur-4-machine-power-system/82)
**Author:** [@Parija](https://community.opal-rt.com/u/Parija)\
**Replies:** 1\
**Last updated:** [July 12, 2026, 10:00am UTC](https://community.opal-rt.com/t/kundur-4-machine-power-system/82 "2026-07-12T10:00:00Z")
Overview The classic two-area benchmark for studying low-frequency oscillations, disturbance response, and power system stabilizer behavior. The Kundur 4-machine system is one of the most recognized benchmark models in …