Kohler EKOZD Series Service page 266

14.5.5 Overload Shed
Overload Shed uses the percent loading of the
generator system and the Generator Overloaded
Percent to compute a Degree of Overload. The percent
loading of the generator system is taking from the
generator metering in a single-generator application
and from the total bus percent loading in a paralleling
application.
Figure 14-12 Generator Overload Shed Timing With Default Configuration
The Base Over Load Shed Time sets the shed time at a
10% degree of overload, while the time decreases with
additional generator load.
The time to shed subsequent priorities decreases by a
fixed 0.4 acceleration factor for each priority shed,
hence if the first priority shed in 10 seconds, the second
priority will shed in 6 seconds, while the third priority will
shed in 3.6 seconds and the fourth priority in 2.2
seconds with the same load on the generator system.
Note: The shed function is
accumulator and the timing is determined by the
rate that the accumulator fills, hence a varying
load will fill the accumulator at varying rates,
causing the load to shed at a time that can't be
calculated directly with the equation above, but
can be estimated by it.
266 Section 14 Load Management
performed by an
Degree of Overload is computed according to the
following formula:
Degree of Overload = (Generator Overloaded Percent –
Generator System % load)
The kW Shed Accumulator fills at a rate that is dependent
on the Degree of Overload and the Base Over Load Shed
Time such that the time to shed the first priority after the
overload condition occurred is defined as:
TP-6953 7/19