Named trace configuration: WAT_Valve_Isolation

Configuration

A Find Connected trace is executed. The trace stops as soon as a FlowControlDevice is found that is located on a distribution or transmission line (attribute "NET_Trace"  =1)

The following elements are selected as the result

•Next FlowControlDevice on a distribution or transmission line

•Connections (ServiceConnection) subject to isolation

Depending on the requirement, the trace configuration could be adjusted such that
 
- the hydrants in question are also included that, if shut down, would affect the fire department;
- only the not-yet-closed FlowControlDevice is brought into the distribution or transmission line instead of all of the  next slide valves independently of the current switch status.
 
For the correct execution of the trace configuration, the "NET_Trace" attribute  must be correctly filled for the FlowControlDevice. For this, the ":Category_Net_Trace" attribute rule must be enabled. It analyzes which slide valves can be used to isolate a network area.
 
A geographical intersect is implemented for the FlowControlDevice using WATLine. If the FlowControlDevice is located on at least one  larger line of the "DistributionLine" type or "TransmissionLine" type, then its network attribute "NET_Trace" is set to 1. In this way, the slide valves that are relevant for shutdown are identified. This is because a technician only intends to close off the main slide valve and not every single home connection.

Internal only: "TappedValve Off" attribute rule:

The rule looks at all FlowControlDevices of the WAT device. If asset types Valve, NonReturnValve or StationValve are involved and the "NET_CurrentPosition" attribute is set to "off_plug" for the current switch status, the value of the "NET_CurrentPosition" network attribute is set to "off". If the asset type is a TappedValve, a current value of "off"  for "NET_CurrentPosition" is set to "off_plug".

Thanks to this differentiation between "off" and "off_plug" for a closed slide valve, different trace behavior can be defined for a tapped valve and a slide valve.