Extended Maximum Time per Curve
Extended Maximum Time per Curve changes the way the Maximum Time setting can be used.
Instead of a global Maximum Time setting, it allows a Maximum Time setting to be applied to each trip setting for each element that uses an inverse curve for the protection timing.
Making the feature available
In order to use this feature, Extended Maximum Time per Curve must be made available by the operator via the WSOS Feature Selection menu.
The Feature Selection menu can be found by navigating through:
> > .
Operation
Normally there is only one Maximum Time setting for each protection group. It’s a global setting which means that it applies to all trip settings in that group that use an inverse curve for timing.
When the Extended Maximum Time
per curve feature is on, there is a separate Maximum Time setting
for each inverse curve that has been applied.
(Maximum
18)
This feature also reduces the minimum value for Maximum
Time settings from
2.0 s to 0.2 s. The maximum setting
remains at 180.0 s.
The figure below shows the Global Settings and Trip 1 pages with Extended Maximum Timer per Curve Off. In this configuration, Maximum Time is a global setting. One setting per group appears on the Global Settings page.
Figure 124
Extended Maximum Time per Curve
OFF
In the figure below with Extended Maximum Time per Curve On, the Maximum Time setting no longer appears on the Global Settings page. Instead, a separate Maximum Time setting is included for each trip setting for which an inverse curve is selected.
Figure 125
Extended Maximum Time per Curve
ON