Basic set-up assumptions - HxGN EAM - 11.07.01 - Feature Briefs - Hexagon

HxGN EAM Mobile for Transit Map View Main Isolation Functionality Guide
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English
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HxGN EAM
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Feature Briefs
HxGN EAM Version
11.7.1

Prior to performing Main Isolation in EAM Mobile for Transit, it is assumed that the system administrator has previously integrated (i.e. each GIS feature and the corresponding EAM equipment record are associated via a unique GISOBJID) all GIS features within the Mains and Valves layers. For Main Isolation, it is essential that each GIS feature is associated with an existing HxGN EAM equipment record.

For more information on integrating GIS features with HxGN EAM equipment; see HxGN EAM Configuration Guide for GIS.

Main Isolation functionality in EAM Mobile for Transit is also dependent upon use of a network of GIS features which incorporate the concept of isolation blocks. In short, isolation blocks identify or define the minimum area of network surrounding a main/pipe that can be isolated by the closure of a set of valves. This concept also encompasses the following related assumptions:

  • A Block may include one or more mains (pipes).

  • The area of isolation is the same for all pipes within the same isolation block.

  • Each isolation block is connected with its neighbors at the isolation valves.

  • An isolation block is enclosed by at least one or more valves.

  • Valves will always be associated to 2 blocks (one on either side of the valve).

  • Dead-end blocks: An isolation block may be downstream of another isolation block, with no other neighboring blocks providing a supply source. When the upstream isolation block is closed, then the dead-end block is also disconnected from the network.

    Any valves connecting an isolation block with a neighboring dead-end do not need to be closed to isolate from the network.

  • Dead-end branches: In some cases, multiple isolation blocks will be downstream of a common isolation block (i.e. a small branch sub-network with one point of supply). When the common isolation block is closed, then all of the downstream isolation blocks will also be disconnected from the network.

    Any valves connecting an isolation block with the most upstream block of a dead-end branch do not need to be closed to isolate from the network.