Kohler GM77177-KP1-QS, Руководство по установке

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Capacity
The Generator Maximum Percent Capacity setting
dictates the maximum level that the load control module
will automatically place on the generator. This setting is
adjustable using a laptop computer connected to the
RDC2 or DC2 controller and Kohler
r
SiteTech
t
software. See Section 4.2.4.
The maximum load is calculated by multiplying the
Generator Maximum Percent Capacity by the Genset
Power Rating, which is a setting in the RDC2/DC2
controller.
The Genset Power Rating, in kW, is
factory-set to the natural gas rating. If the 14RESA or
20RESA has been converted to LP fuel, use SiteTech to
change the Genset Power Rating on the controller.
Refer to the generator set specification sheet for the new
rating, and change the rating (kW) under the Genset
System Configuration in SiteTech. See Figure 21 and
TP-6701, SiteTech Software Operation Manual.
The LCM will operate if the rating setting is not changed,
but loads will be shed at a kW level based on the factory
default rating, rather than the rating of the reconfigured
generator set.
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tt1574
1. Genset Power Rating setting
Figure 21 Genset Power Rating in SiteTech
4.2 Load Shed
Less important (higher priority number) loads are shed
when the generator is unable to support them. This
permits more important loads to continue to receive
power from the generator. The less important loads are
re-added after the generator loading has gone down
enough to support them again. The LCM sheds less
important loads before the power quality of the
generator suffers from the overload.
Loads are shed in two ways – Overload and Under
Frequency.
4.2.1 Overload Shed
Loads are shed on a time scale which is based on the
total generator overload. The loads will shed slowly
when the generator is not heavily overloaded. Loads
are shed much more quickly when the overload is
higher. The timing variation allows consistent overloads
to be removed, instantaneous excessive overloads to
be very quickly removed and normal overloads (such as
motor inrush) to remain online until the transient
overload condition is removed.
Figure 22 shows the overload shed timing for a 20 kW
generator set with the generator overloaded percent set
to the default setting of 85%. If the overload condition
persists, the load shed timing can be affected by load
shed acceleration. See Section 4.2.3.
The Generator Overload Percent setting is the
maximum load that the LCM will accept without
shedding.
The setting is adjustable using a laptop
computer connected to the RDC2 or DC2 controller and
Kohler SiteTech software. See Section 4.2.4. Set the
Generator Overload Percent at least 10% higher than
the Generator Maximum Percent Capacity.
Generator
Overload
(%)
Load (%)
Load (kW) for
a 20 kW
Generator
Time
(seconds)
0% <85% <17 kW Never Shed
0% 85% 17 40
10% 95% 19 28
13% 98% 19.6 24
15% 100% 20 22
20% 105% 21 17
>35% >120% >24 kW 0.5
Figure 22 Overload Shed Timing for a 20 kW
Generator