System Voltage And Frequency - Kohler MPAC 1500 Manual

Use the Set System, Source type screen to change the
source types to generator set-generator set or
utility-utility if necessary. The gen-gen type uses two
generator sets and requires the assignment of a second
engine start output. Use the Input/Output Setup screen
to assign one of the main logic board terminal strip or I/O
module outputs to Start Source N Generator, and
connect the engine start leads for the Source N
generator set to the corresponding terminals on the
terminal strip or I/O module terminals. See Section 5.12.
The programmable engine start output remains tied to
the Source N generator set regardless of the preferred
source selection.
The utility-utility source type is designed to use utility
power for both sources. This source type does not use
the engine start outputs.
Time Delays and Source Parameters. Engine start
relays and time delays, source voltage and frequency
trip points, and load shed time delays are assigned to
the source (N or E). They do not change assignment
when the preferred source selection is changed.
Item
Source N generator engine start relay
Source E generator engine start relay
Source N engine start time delay
Source E engine start time delay
Source N engine cooldown time delay
Source E engine cooldown time delay
Source N voltage and frequency trip points
Source E voltage and frequency trip points
In-phase monitor sync
Pre-transfer to source N
Pre-transfer to source E
Post-transfer to source N
Post-transfer to source E
Preferred-to-standby time delay
Standby-to-preferred time delay
Failure to acquire standby source
Off-to-standby time delay (programmed-transition only)
Off-to-preferred time delay (programmed-transition only)
Note: Source N is connected to the Normal side of the transfer switch, and Source E is connected to the Emergency side.
Figure 5-14 Preferred Source Selection Effect on System Parameters and Time Delays
74 Section 5 Setup
Note: Source N is always connected to the Normal side
of the transfer switch, and Source E is always
connected to the Emergency side.
Other time delays are assigned to the source function
(preferred or standby). System parameters that are
assigned to the function automatically change source
when the preferred source selection changes.
Figure 5-14 shows which parameters are assigned to
the source and which are assigned to the function. The
last two columns of the table show the effect of the
preferred source selection on each parameter or time
delay.

5.11.4 System Voltage and Frequency

For each source, set the number of phases, nominal
voltage, and nominal frequency (50 or 60 Hz). Then
proceed to set the pickup and dropout settings.
Preferred Source Selection
Assignment
Source
Source
Source
Source
Source
Source
Source
Source
Source
Source
Source
Source
Source
Function
Function
Function
Function
Function
Normal Emergency
N N
E E
N N
E E
N N
E E
N N
E E
E E
N N
E E
N N
E E
N to E E to N
E to N N to E
E N
Off to E Off to N
Off to N Off to E
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