The Oracle instance is a workspace on the Oracle database server where Oracle keeps a single database. You need to create a new instance in Oracle if you have an existing Oracle database server whose parameters do not comply with the parameters required to use Smart Electrical on Oracle. This way you can append the Smart Electrical database to existing Oracle databases on your Oracle database server without losing your existing Oracle database information.
You can create as many instances as required and, in this way, append as many databases as you need on a single database server. However, note that appending instances on your Oracle database server can slow down your work in the Smart Electrical database located on that server.
For additional information about limitations on creation of instances, see your Oracle User Guide.