Protection Groups

There are up to 10 groups of protection settings (referred to as Protection Groups A, B, C, D, E, F, G, H, I, and J). Each Protection Group can have different settings. Users can nominate which one of the 10 protection groups is active. The active protection group settings are used for fault detection and timing.

Normally only one protection group can be active at one time. The exception is when Directional Protection is on. Directional protection uses two protection groups, one for forward faults and one for reverse faults.

If Directional Protection is on, the user must choose between five pairs, A/B, C/D etc. where the first group in the pair is for forward faults and the second group is for reverse faults.

If less than ten protection groups are required, the controller can be configured for a lower number.

The only way to change the number of configured protection groups is to change the setting in WSOS while it is off-line and do a Write Switchgear Settings to the Switchgear with the Protection tick box selected.