Substation protection relay settings

Identifies documents containing references to substation protection relay settings in Australian contexts. This information type is classified as personally identifiable information under the Privacy Act 1988.

Type

regex

Engine

boost_regex

Confidence

medium

Confidence justification

structural regex with domain-specific anchors and constrained context replaces phrase-only marker.

Detection quality

Mixed

Jurisdictions

global

Regulations

AML/CTF Act (Cth), HRIPA (Cth), IPA 2009 (Qld), My Health Records Act 2012 (Cth), NDB Scheme (Cth), Privacy Act 1988 (Cth), TIA Act 1979 (Cth)

Frameworks

ISO 27001, ISO 27701

Data categories

pii

Scope

wide

Platform compatibility

Purview: Compatible, GCP DLP: Compatible, Macie: Compatible, Zscaler: Compatible, Palo Alto: Degraded, Netskope: Unsupported

Pattern

(?is)\b(?:protection\s+relay|relay\s+setting|distance\s+relay|pickup\s+setting|trip\s+setting|critical\s+infrastructure|power\s+grid|electrical\s+protection|fault\s+current|impedance\s+relay)\b

Corroborative evidence keywords

substation protection relay settings, substation, protection, relay, settings, critical, infrastructure, systems

Proximity: 300 characters

Should match

• protection relay — Primary topic phrase match
• relay setting — Case-insensitive topic phrase match
• distance relay — Alternative topic phrase match
• pickup setting — Additional topic phrase match

Should not match

• unrelated generic text without domain phrases — No relevant topic phrases present
• placeholder value 12345 — Random text should not match topic-specific regex
• protection relay substation — Generic word pair from old broad template should not match

Known false positives

• Common words and phrases related to substation protection relay settings appearing in policy documents, training materials, HR templates, or compliance guidelines without actual personal data. Mitigation: Require corroborative evidence keywords within the proximity window to confirm sensitive data context rather than general discussion.
• In Australian English, similar terminology used in formal or administrative contexts (education, professional documentation) that does not constitute sensitive data collection. Mitigation: Layer with additional contextual signals such as structured identifiers, form fields, or database column headers to distinguish sensitive records from general references.
• High-frequency pattern matches in large document corpora due to broad regex anchors. Expected match rate is significantly higher than specific identifier patterns. Mitigation: Tune confidence thresholds for bulk scanning. Consider using this pattern primarily as a pre-filter with secondary validation.

References

• https://www.legislation.gov.au/C2018A00029/latest/text
• https://www.cyber.gov.au/resources-business-and-government/essential-cyber-security/ism