TP-6714 4/1084 Section 5 Setup
5.14 Set System
5.14.1 Source Type/Source Type
Set the source type selection for the types of sources
used:
D One utility source and one generator set
D Two generator sets (gen-gen) (Use for prime power
run mode. See Section 5.8.)
D Two separate utility sources
D One utility source and two generator sets for a
three-source system (see Section 5.15)
5.14.2 Transition Type
The transition type is factory set for each model and
should not require change except in the case of
controller replacement. Select standard, programmed,
or closed transition, if necessary.
Note: The transition type is determined by the ATS
model as indicated Figure 5-23. Do not attempt
to change the transition type to one that is not
listed for your model.
Model Transition Type
KBS
Standard
KCS
KGS
KSS
KBP
Programmed
KCP
KSP
KEP
KGP
KBC
Closed
KCC
Figure 5-23 Transition Types by Model
Standard-transition (also referred to as open
transition) models use a break-before-make transfer
that does not require source synchronization for transfer
between available sources.
Programmed-transition models stop momentarily in
the OFF position during transfer between two available
sources. The time in the OFF position can be adjusted
using the transfer time delays. See Section 5.9.
Closed-transition models provide make-before-break
transfer for uninterrupted power to the load when both
sources are available. The sources are monitored for
synchronization and are paralleled for approximately
100 milliseconds during the transfer.
Programmed-transition override (for closed-
transition models only). When closed transition is
selected, the programmed-transition override menu
appears. The override function operates if the sources
do not synchronize before the Inphase Transfer Fail
time delay expires. In this case, the transfer switch can
be set to transfer to the other source using
programmed-transition mode, with a short interruption
in power to the load during transfer.
D Select Automatic to set the unit to initiate a
programmed-transition transfer automatically after
the Inphase Transfer Fail time delay expires.
D Select Manual to require an operator to initiate a
programmed-transition transfer by pressing a button
after the Inphase Transfer Fail time delay expires.
If a manual transfer is not initiated, the controller
continues to monitor the sources and transfers if
synchronization occurs.
D Set the Xfr Off>Stby (transfer off-to-standby) time
delay for the desired “off” time during the transfer.
See Section 5.4.2 for the default time delays.
5.14.3 Service Entrance
The model KEP is a service entrance rated
programmed-transition transfer switches. ICCB
denotes insulated case circuit breakers or switches.
MCCB denotes molded-case circuit breakers or
switches. Check the model designation on the ATS
nameplate and see the model designation key in the
specification sheet or the Installation Manual to identify
ICCB and MCCB models.
5.14.4 Rated Current
This value is factory-set for each unit and should not
require adjustment. If necessary, enter the rated current
from the transfer switch nameplate.
5.14.5 Three Source Engine Start Mode
See Section 5.15, Three-Source Systems.
5.14.6 Transfer Commit
The transfer commit function controls operation if the
preferred source returns after a transfer to standby
sequence has been initiated but not completed (i.e.,
preferred returns during the transfer time delay).
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