TP-6126 8/02
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Section 3 Setup and Test
3.4 Programmed-Transition
Interface Board (PTIB)
Programmed-transition model transfer switches use a
programmed-transition
contactor
and
a
programmed-transition interface board (PTIB).
The
PTIB is mounted on the inside of the enclosure door.
The PTIB is factory-wired and requires no additional
wiring in the field. Verify that the PTIB wiring harness is
connected to the main logic board. See Figure 3-10 for
the PTIB connector location.
1
GM21079
1. Controller assembly (located inside the enclosure door)
2. PTIB connection
3. PTIB
3
2
Figure 3-10
Programmed-Transition Interface Board
(PTIB)
3.5 System Settings and Time
Delays
The system can be operated using the factory settings
listed in the following sections.
Use the Setup Program to change the controller time
delays, pickup and dropout settings, inputs, outputs,
and options if necessary.
3.5.1
System Parameters
The system parameter factory settings are shown in
Figure 3-11.
The controller voltage and frequency
sensing are factory-set to the default values shown in
Figure 3-12. The voltage and frequency debounce time
delays prevent nuisance transfers caused by brief
spikes and dips in the power supply.
System Parameter
Factory Setting
Open or programmed transition
Set to order
Single/three phase
Set to order
Operating voltage
Set to order
Operating frequency (50 or 60 Hz)
Set to order
Phase rotation
ABC
Commit to transfer (yes or no)
No
Rated current
Set to order
Operating mode:
Generator-toGenerator,
Utility-to-Generator, or
Utility-to-Utility
Utility-to-Generator
In-phase monitor
Disabled
In-phase monitor transfer angle
0
Transfer mode
(automatic or non-automatic)*
Set to order
* The transfer mode (automatic or non-automatic) cannot be
changed in the field.
Figure 3-11
System Parameters
Voltage and Frequency Sensing
Parameter
Default
Undervoltage pickup
90% of nominal
Undervoltage dropout
90% of pickup
Overvoltage dropout
110% of nominal
Overvoltage pickup
95% of dropout
Voltage debounce time
0.5 sec.
Underfrequency pickup
90% of nominal
Underfrequency dropout
99% of pickup
Overfrequency dropout
101% of pickup
Overfrequency pickup
110% of nominal
Frequency debounce time
3 sec.
Figure 3-12
Factory Settings, Voltage and Frequency
