One-Line Device Diagram Blocks

The One-Line Device Diagram Blocks commands allow you to customize the list of blocks available to be used in the one-line diagram.

See the Block Creation section for more information about creating new blocks.

See the General Customization Commands section for more information about how the Edit Project List, Edit Master List, Copy Project List to Master, and Copy Master List to Project commands work.

The Edit Project List and Edit Master List commands open the One-line Device Diagram Blocks dialog box.

One-line Device Diagram Blocks Dialog Box

One-Line Devices--One-Line Device Diagram Blocks Dialog Box

Sort: Press this button to sort the list of blocks alphabetically by the description column.

Move Up: Press this button to move the selected block up in the list of blocks.

Move Down: Press this button to move the selected block down in the list of blocks.

New: Press this button to create a new block.

Delete: Press this button to delete the selected block. If the block is currently used by a record in the schedule, you will be asked if you want to replace the block in the schedule with another block.

See the Common Block Information section for more information about the Description and Block Name values that can be specified for one-line device diagram blocks.

Description: The description field for one-line device diagram blocks is a little different from the description field of other blocks. There are certain block descriptions that are required for one-line diagram blocks. The blocks associated with these descriptions are used when drawing certain elements of the one-line diagram. The required block descriptions have a gray background. The description for these blocks cannot be changed, but all of the other settings can be.

The following list describes where these required blocks are used.

Circuit Breaker: This block is used as the default block for circuit breakers on feeders.
Fused Switch: This block is used when an Enclosed Breaker type is set to Fused Disconnect.
Non-Fused Switch: This block is used when an Enclosed Breaker type is set to Disconnect.
Wire Break: This block is used when a break is inserted in a feeder wire.
Lugs: The lugs blocks are inserted at the top and bottom of the bus bar when the one-line block type is set to Panel with Bus Bar. The Top blocks are placed at the top of the bus bar. The Bottom blocks are placed at the bottom of the bus bar. The Standard, Double, and Feedthrough blocks are used based upon the value of the Lugs field for the one-line device that you are inserting. The special descriptions for lugs are Standard Lugs Top, Standard Lugs Bottom, Double Lugs Top, Double Lugs Bottom, Feedthrough Lugs Top, and Feedthrough Lugs Bottom.

Image Name: This is the name of the file containing the image to display for this block. Double-click on the row and select Browse to browse for the file you wish to use for any given block. If the image name is left blank, it assumes that a slide with the same name as the block should be used as the image.

One-Line Device: This pulldown controls whether the block is available to be used for one-line devices in the one-line diagram. If it is set to Yes, it will be available to be used as a block for one-line devices. If it set to No, it will not be available to be used as a block for one-line devices.

It can also be set to a specific type of one-line device. If it is, it will be available to be used as a block for one-line devices. It will also be the default block for the type of device selected. This allows you to control the default block that is chosen when creating your one-line diagram. If a specific one-line device type is not assigned a default block, the special Panel Block with Bus or Panel Block is used instead (depending upon the setting of the Include bus in default panel graphic option).

Branch Circuit Device: The check box controls whether this block is included as an option when inserting a branch circuit device in the one-line diagram. If it is set to Yes, it will be available to be used as a block for branch circuit devices. If it set to No, it will not be available to be used as a block for branch circuit devices.

If it is set to Equipment, it will be used as the default block when inserting an equipment connection on the one-line diagram.

Feeder Block: Whether or not this block can be used as part of a feeder. If checked, this block will be allowed as an OCP device, a block at the start of a feeder, or a block at the end of a feeder.


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