Industrial Policy Examples

These examples show how the policy-management system expresses familiar industrial access requirements. They are customer scenarios, not configuration fragments.

Figure — Policy examples are expressed against industrial operation context and outcomes.

Vendor access limited to one packaged unit

Business need: an OEM specialist must diagnose one packaged process unit remotely.

Policy: the named VPN user may reach only the assigned controller and may perform approved diagnostic reads. Control writes, access to adjacent equipment, and unexpected industrial operations are blocked and recorded.

Value: remote support can proceed without granting broad plant access.

Feeder breaker switching under operating prerequisites

Business need: an authorized feeder engineer must operate the F12 breaker.

Policy: the assigned user may inspect breaker status, Local/Remote mode, and relay conditions. Open or Close is permitted only through the approved control sequence, while the breaker is in Remote mode and no lockout condition is active.

Value: user authorization, equipment state, and command safety are evaluated as one industrial decision.

Protection engineer with read and acknowledge authority

Business need: a protection specialist must investigate a feeder operation without receiving unrestricted switching authority.

Policy: the user may read trip, pickup, target, and lockout indications and perform only the approved reset or acknowledge operation. Breaker switching is outside the policy.

Value: the granted access reflects the engineer's real task and separation of duties.

Transformer condition monitoring without control

Business need: an asset engineer needs remote visibility into TR1 but should not change tap position.

Policy: the user may read loading, winding temperature, and actual tap feedback. OLTC commands are blocked and recorded.

Value: condition monitoring does not automatically become control authority.

Controlled OLTC maintenance

Business need: a transformer specialist requires temporary control authority during approved maintenance.

Policy: the user may request only tap positions 1–17 using the approved sequence. Out-of-range or improperly sequenced requests are blocked. Loading, temperature, request, and feedback events are retained for the maintenance record.

Value: control authority is bounded by the transformer's engineering profile.

DER intertie operation

Business need: a DER specialist must operate the DER-5 intertie.

Policy: approved Open and Close operations are available to the assigned user. A Close is accepted only when bus voltage and synchronization or dead-bus conditions are valid and the required command sequence has been followed.

Value: a consequential generation-interconnection command is protected according to its electrical purpose.

Normally-open tie protection

Business need: an operator may use TIE-12-14 for an approved restoration procedure.

Policy: the user may inspect tie position and request an approved operation. Closing requires valid topology, no conflicting parallel outage, and the approved command sequence.

Value: topology-changing access is not treated as an ordinary connection privilege.

Load-shedding authority separated from general control

Business need: a designated operator requires load-shed and restore authority, while other remote users must only observe the relay.

Policy: only the designated user's dedicated profile includes the approved shed and restore commands. Other profiles include read-only status access.

Value: high-impact emergency authority is separated by user and purpose.

Monitor-first commissioning

Business need: a site wants to confirm a new policy against normal operations before enabling blocking.

Policy: the same equipment and operation scope is initially configured to record deviations while allowing traffic. After engineering acceptance, the enforcement outcome is revised to block the approved violation cases.

Value: customers can introduce protocol-aware control through a measured, evidence-based commissioning process.

One user, one controlled industrial purpose

The strongest design pattern is simple:

Define	Customer question
User	Who has been approved?
Scope	Which plant area or equipment is required?
Operations	What must the person observe or control?
Safety conditions	Which equipment states and prerequisites must be satisfied?
Outcome	What is accepted, recorded, or blocked?
Dedicated service	Which independent L2Proxy instance enforces this access?

This produces policies that operations and engineering can review without translating a generic network-access list into industrial meaning.

Next: Lifecycle and Governance.