MEPworx Wiring – Updates for Bidirectional CPDs

by David Wren

In accordance with the requirements of IET BS 7671:2018, Amendment 3, Section 530.3.201:

Selection and erection of equipment for protection shall take account of appropriate use of either a unidirectional protective device or a bidirectional protective device.

In the Circuit Protective Device Databases (CPD DBs), there is the added property to indicate if a device is Bidirectional or not. i.e. True or False.

 

The Bidirectional property of a breaker is set up in the Data Entry dialog, as illustrated below:



In the Wiring program, that characteristic is then confirmed in the Detailed CPD Entry dialog:



Also in the Sub Mains and Final Board Schedules:

 

For more information and guidance, please refer to the in-program Help (F1) and run a Search for Bidirectional.