Why? Small power plants must be disconnected from the grid immediately in the event of a network shutdown or network disruption to avoid any danger to people and equipment.

Function: An automatic disconnection device monitors the feed-in of energy to the 230/400V grid. In case of a power failure or disruptions by the energy supplier it is vital for small power plants to be disconnected within a few milliseconds. Monitoring the voltage and frequency and recognizing isolated (off-grid) operation are essential requirements for any automatic disconnection device.

The following parameter sets are pre-programmed for Australia, on the latest version of the NA003 (I):

• #45     1135   NSW - Ausgrid 23
• #46     1140   NSW - Essential 23
• #47     1145   NSW - Endeavour 23
• #48     1150   VIC - United Energy 23
• #49     1155   VIC - Ausnet Energy 23
• #50     1160   VIC - Citipower 23
• #51     1165   VIC - Jemana 23
• #52     1170   VIC - Powercor 23
• #53     1175   VIC - Western Power 23
• #54     1180   ACT - Evoenergy 23
• #55     1185   QLD - Energex 23
• #56     1190   QLD - Ergon 23
• #57     1195   SA - Power networks 23