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101433 Marketing - C PST
Automatic Source Transfer Switchgear
The Ability In Reliability. Critical customer loads, such as
health, educational, financial,
and manufacturing facilities,
require optimum power quality
and reliability. These loads are
normally provided with a
preferred and an alternate
source of power. Source transfer
packages are used to switch the
load to the alternate source
when the preferred source is lost,
and to transfer back when
voltage is restored.
Cooper Power Systems PST
(Padmount Source Transfer)
packages are self-contained
devices, which provide
automatic source transfer in 6
cycles or less, and fault protection
for 15, 25 and 35kV underground
systems.
PST combines several time-proven
Kyle
®
products: S control, which
performs the automatic transfer
based on loss of voltage
detection; TPG control, which
provides fault detection; and CI
vacuum fault interrupters, which
perform three-phase switching
and fault interruption.
PST Packages
PST is available in two
configurations: The PST Model 6 is
the industry standard, and
includes two CI mechanisms
which are operated by an
S control during loss of voltage
conditions (transfer), and by a
TPG control during fault
conditions (tripping).
Occasionally,
two critical
loads must be
served, each
independently,
from the same
source. The PST
Model 9 includes two CI
mechanisms which are operated
by an S control during loss of
voltage conditions (transfer); and
two three-phase VFI (vacuum
fault
interrupter)
mechanisms
operated by
two TPG
controls during
fault
conditions. This
arrangement provides
independent transfer and fault
protection operations of the PST.
PST Components
CI INTERRUPTERS
The CI interrupters feature Kyles
patented, long-life, maintenance-
free vacuum interrupters, for
many years of trouble-free
performance.
When energized, a motor winds
the CI interrupter mechanism to
When trust in power transfer reaches
the critical stage, transfer to PST from
Kyle. Health, education, finance and
manufacturing all depend on reliabilty
and power quality as a way of life.
They can all depend on PST for reliable
source transfer. And so can you.
KYLE PST PADMOUNT SOURCE TRANSFER
15, 25, 35kV
Fast Source Transfer
Improved System Reliability
Vacuum Interruption
Deadfront Construction
Preferred
T
TPG
Control
S
Control
N.O.
N.C.
Alternate
T
1
T
2
S
Control
TPG
Control
TPG
Control
Preferred
Alternate
N.O.
N.C.
VFI
VFI
PST-6
PST-9
® charge the opening and closing springs; this provides
quick-open and quick-close operation of the vacuum
interrupters. This results in transfer times of 6 cycles or less.
Each CI mechanism can also be operated manually,
should control power be lost. A shot-
gun stick can be used to operate the
trip/close levers, and the push-pull
handles for manual charging of the
springs. Viewing ports provide access
to the contact position indicators and
operation counters for each
interrupter.
TPG CONTROL
Kyles TPG control provides
overcurrent detection, and issues trip
signals to the CI mechanism or the VFI
mechanism depending on the PST configuration.
The TPG control is powered by the current sensing
transformers in the PST; no external voltage supply or
battery backup is required. TPG is not affected by system
voltage conditions such as overvoltage transients. A wide
variety of time-current curves and settings are available for
flexibility of coordination, and a SCADA accessory for remote
control and monitoring. The TPG control can be programmed
via the front panel, without the use of a computer.
S CONTROL
Kyles S control is a time-proven,
user-friendly control that provides the
timing and control logic required to
perform the automatic source transfer.
Simple relay logic and analog timers
assure reliable operation, ease of
installation and quick troubleshooting.
The front panel of the control provides
visual indication of the status of each
CI interrupter, control settings and
manual operation capabilities. The
S control can be programmed via the
front panel, without the use of a
computer.
Source Transfer
S Control
SOURCE I
SOURCE II
Easy Access to
Connection
and Controls
CI Interrupters
Trip/Close Levers
(Either source can be the preferred.)
SOURCE-SIDE COMPARTMENT Fault Protection, TPG
Controls Coupled
with Fault Interrupters
Provide Independent
Fault Protection for
Each Tap
Three-Phase Trip -
All Three Phases Trip
Simultaneously
200A Bushing Wells
(ANSI/IEEE Standard 386)
ANSI Standards
The Type PST padmount transfer package meets ANSI
C37.72 for manually operated, deadfront padmount
switchgear with load-interrupting switches, and ANSI
C37.60 for automatic circuit reclosers and fault
interrupters.
Additional Information
For additional information on PST padmount switchgear,
refer to the following publications:
PST-6 Installation Manual
S285-60-3
PST-9 Installation Manual
S285-60-1
S Control Service Bulletin
S260-75-1
Nominal Voltage
15kV
25kV
35kV
BIL, kV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupting Current (sym.), kA . . . . . . . . . . . . . . . . . . . . . . . .
Load Break and Continuous Current Rating (sym.), Amps . .
Momentary Current 10 Cycles (asym.), kA . . . . . . . . . . . . . .
95
12
600/200
20
125
12
600/200
20
150
12
600/200
25
Ratings for PST Switchgear
Basic Models/Bushing Guide
TAP-SIDE COMPARTMENT
P.O. Box 1640, Waukesha, WI 53187
PH 262-524-3300 FAX 262-524-3313
www.cooperpower.com
©2003 Cooper Power Systems, Inc.
Kyle
®
is a registered trademark of Cooper Industries, Inc.
KDL
2/03
Bulletin 01043 February 2003 Supersedes 3/02
Model
Nominal Voltage (kV) PST Catalog No.
6
9
15
25
35
15
25
35
KPST62
KPST65
KPST68
KPST92
KPST95
KPST98
Voltage
Rating
Bushing Amperage Rating (Source/Tap)
600A/600A
600A/200A*
200A/200A*
15
25
35
1
4
7
2
5
8
3
6
9
* PSTs ordered with 15 or 25kV rating are equipped with wells only on the 200 Amp side.
Phase
Diagram
For different amperage ratings, replace the last digit of the catalog number
with the approximate digit from the Amperage Rating Table.