Padmounted Switchgear
Service Information
Type PST-9 Automatic Source Transfer Switchgear
Installation, Operation & Maintenance Instructions
Figure 1.
Kyle® Type PST-9 Automatic Source Transfer Switchgear.
S285-60-1
911053KM
Contents
Safety Information ..................................................... 2
Installation Procedures .............................................16
Product Information .................................................. 3
Initial Mechanical Operation Check .......................17
Introduction ............................................................ 3
Initial Electrical Operation Check ...........................18
Acceptance and Initial Inspection .......................... 3
Initial S Control Operation Check............................19
Handling and Storage ............................................. 3
Maintenance Information...........................................20
ANSI Standards ...................................................... 3
Maintenance Inspection Procedures ......................20
Quality Standards.................................................... 3
Internal Inspection and Repair ...............................20
PST-9 Overall Description ........................................ 4
Insulating Oil Maintenance .....................................21
Ratings and Specifications ...................................... 7
Frequency of Maintenance ....................................21
Load Transfer Functionality ...................................... 8
Types of Oil Samples .............................................21
S-Control Operation ............................................... 8
Oil Sampling Guidelines .........................................21
CI Interrupter Switch Operation ..............................12
Oil Fill Guidelines ...................................................21
Overcurrent Protection Functionality ......................14
Oil Testing ..............................................................22
TPG Electronic Trip Control Operation ...................14
Testing.........................................................................23
VFI Vacuum Fault Interrupter Operation .................15
High Potential Withstand Tests ..............................23
Replacement Parts .....................................................23
December 2002 • NEW
Printed in USA
1
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
!
SAFETY
FOR LIFE
!
SAFETY FOR LIFE
SAFETY
FOR LIFE
Cooper Power Systems products meet or exceed all applicable industry standards relating to product safety. We actively
promote safe practices in the use and maintenance of our products through our service literature, instructional training
programs, and the continuous efforts of all Cooper Power Systems employees involved in product design, manufacture,
marketing, and service.
We strongly urge that you always follow all locally approved safety procedures and safety instructions when working
around high voltage lines and equipment and support our “Safety For Life” mission.
SAFETY INFORMATION
The instructions in this manual are not intended as a substitute for proper training or adequate experience in the
safe operation of the equipment described. Only competent technicians, who are familiar with this equipment
should install, operate, and service it. A competent technician has these qualifications:
Safety Instructions
Following are general caution and warning statements
that apply to this equipment. Additional statements, related to specific tasks and procedures, are located throughout the manual.
• Is thoroughly familiar with these instructions.
• Is trained in industry-accepted high- and low-voltage
safe operating practices and procedures.
• Is trained and authorized to energize, de-energize,
clear, and ground power distribution equipment.
• Is trained in the care and use of protective equipment
such as flash clothing, safety glasses, face shield,
hard hat, rubber gloves, hotstick, etc.
Following is important safety information. For safe installation and operation of this equipment, be sure to read
and understand all cautions and warnings.
DANGER: Hazardous voltage. Contact with high
voltage will cause death or severe personal injury.
Follow all locally approved safety procedures when
working around high and low voltage lines and equipment.
G103.3
!
WARNING: Before installing, operating, maintaining, or testing this equipment, carefully read
and understand the contents of this manual. Improper
operation, handling or maintenance can result in death,
severe personal injury, and equipment damage. G101.0
!
Hazard Statement Definitions
This manual may contain four types of hazard
statements:
DANGER: Indicates an imminently hazardous situation which, if not avoided, will
result in death or serious injury.
!
WARNING: Indicates a potentially hazardous situation which, if not avoided, could
result in death or serious injury.
!
CAUTION: Indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injury.
!
CAUTION: Indicates a potentially hazardous situation which, if not avoided, may result in equipment damage only.
2
WARNING: This equipment is not intended to
protect human life. Follow all locally approved procedures and safety practices when installing or operating this equipment. Failure to comply may result in
death, severe personal injury and equipment damage.
!
G102.1
WARNING: Power distribution equipment must
be properly selected for the intended application.
It must be installed and serviced by competent personnel who have been trained and understand proper
safety prodedures. These instructions are written for
such personnel and are not a substitute for adequate
training and experience in safety procedures. Failure to
properly select, install or maintain this equipment can
result in death, severe personal injury, and equipment
damage.
G122.2
!
!
S285-60-1
SAFETY
FOR LIFE
PRODUCT INFORMATION
Introduction
Handling and Storage
Service Information S285-60-1 provides installation
instructions, operation information, maintenance procedures and testing information for Kyle Type PST-9
Padmounted Automatic Source Transfer Switchgear.
Before installing and operating this control, carefully read
and understand the contents of this manual.
The switchgear should remain on its shipping pallet until
it is installed. When handling the switchgear, always use
a fork truck that has adequate lifting capacity and forks
that extend the entire length of the pallet. Improper handling can cause damage to the switchgear.
For additional information, refer to the following applicable
service information bulletins:
• S260-75-1 Kyle Type S Automatic Transfer Control
Installation, Operating and Maintenance Instructions.
• S275-10-1 Kyle Type CI Three-Phase Fault
Interrupters Installation and Operation Instructions.
• S285-10-1 Kyle Type VFI, Oil Insulated, Vacuum Fault
Interrupter; Installation, Operation, and Maintenance
Instructions
• S285-75-1 Kyle Tri-Phase, TPG, and TPG w/SCADA
Electronic Control
Instructions.
Installation
and
Operation
Read This Manual First
Read and understand the contents of this manual and follow all locally approved procedures and safety practices
before installing or operating this equipment.
If the switchgear is to be stored for any appreciable time
before installation, provide a clean, dry storage area. Be
careful during handling and storage to minimize the possibility of mechanical damage. Do not stack other material on the switchgear cabinet.
ANSI Standards
Kyle PST-9 Padmounted Switchgear products are
designed and tested in accordance with ANSI standards
C37.60, C37.72, C37.85, C.57.12.28 and ANSI/EEE
Standard 386.
Quality Standards
The Quality System at the Cooper Power Systems Kyle
Distribution Switchgear plant is certified to the ISO 9001
Standard.
Additional Information
These instructions cannot cover all details or variations in
the equipment, procedures, or process described, nor
provide directions for meeting every possible contingency during installation, operation, or maintenance. For
additional information, please contact your Cooper
Power Systems representative.
Acceptance and Initial
Inspection
The PST switchgear is completely assembled, tested,
and inspected at the factory. The switchgear is filled to
the correct level with insulating oil. It is in good condition
when accepted by the freight carrier for shipment.
1. Upon receipt, inspect the unit thoroughly for damage
and loss of parts or oil incurred during shipment. If damage or loss is discovered, file a claim with the carrier
immediately.
2. Check for oil leakage and tighten any bolts that may
have loosened during shipment.
3
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
PST-9 OVERALL DESCRIPTION
Type PST-9 Automatic Source Transfer Switchgear provides both loss-of-voltage and overcurrent protection for
critical loads for 15-, 25-, and 35 kV underground systems.
PST-9 units are self-contained, steel constructed pad
mount enclosures containing oil as a dielectric insulator
medium. They are shipped fully assembled and filled with
oil. PST-9 switchgear is designed for outdoor mounting on
a concrete pad. Power is fed to, and from, the switchgear
from underground through openings in the pad. Deadfront
construction minimizes the high voltage safety hazards for
both the operator and the general public.
Vacuum Interrupters
Load-break switching and fault interruption takes place
within sealed vacuum interrupters. Vacuum interrupters
provide fast, low energy arc interruption and produce no
arcing by-products to contaminate the insulating oil. Use
of vacuum interruption significantly reduces the maintenance required of this equipment.
Loss-of-voltage protection functionality is provided by a
Type S Automatic Load Transfer Control and two 3-phase
Type CI motor-operated, source-side vacuum interrupter
switches (Figure 2).
The Type S Automatic Transfer Control monitors the preferred and alternate line voltages and provides the timing
and control logic required to perform the automatic load
transfer in the event of a voltage loss. The control commands the operations of the two Type CI vacuum interrupter switches during auto transfer. Manually operated
levers enable manual trip and close of source-side CI
interrupter switches during power outages. Operational
power (120 Vac) for the transfer control and vacuum
switches is derived from system line levels via internally
mounted potential transformers; no external source of
power is required.
Kyle Type VFI Interrupters and either Tri-Phase or TriPhase with Ground (TPG) electronic controls provide
independent overcurrent protection of the two PST taps.
Both taps are independently served by separate controls
commanding the operations of a dedicated VFI vacuum
fault interrupter on each tap (Figure 2).
CI Switch
CI Switch
S
Control
S1
Preferred
Source
Tri-Phase/TPG
Control
N.O.
N.C.
VFI
VFI
T1 T2
S2
Alternate
Source
Tri-Phase/TPG
Control
Figure 3.
Vacuum Interrupter Assembly.
00015KM
Bushings
Bushings are mounted horizontally in-line and located a
minimum of 24 inches above the pad.
Depending on the rating of the PST-9 unit, bushings may
be furnished in different configurations and ratings. 200
amp interfaces are provided as either 200-amp bushing
wells or 200-amp one-piece loadbreak bushings. 600amp deadbreak aluminum type bushings are furnished
for PST-9 units rated for 600 amp continuous current
operation. All bushings conform to ANSI/IEEE Standard
386.
Standard Cabinet Features
Standard features (Figures 4 and 5) include an oil level
indicator on each front plate, automatic pressure-relief
valve, operation one-line diagrams on the doors, oil fill
plug, oil drain and sampler and a standoff bracket for
each bushing. Standard grounding provisions include a
1/2-13 UNC stainless steel ground nut for each bushing.
Figure 2.
PST-9 Functional Diagram.
Cabinet Padlocking Provisions
Overcurrent sensing, timing and tripping functions are
performed by the Tri-Phase/TPG electronic controls.
Sensing CT's, mounted internally on each phase, are
used by the TPG control to monitor line current. If the
current monitored is greater than the phase or ground
minimum trip level, the control begins a user selected
time-current curve (TCC) delay sequence. At the completion of the programmed TCC delay, a signal is issued
to trip the VFI interrupter on the respective load tap.
Cabinet Construction
4
Provisions are included for padlocking the cabinet in
order to prevent unauthorized door opening. The cabinet
must be locked at all times to prevent accidental contact
with hazardous voltage.
Type PST-9 switchgear features deadfront, tamperresistant, low-profile construction. It is suitable for operation in demanding indoor and outdoor applications.
Cabinets meet the enclosure security requirements of
!
S285-60-1
SAFETY
FOR LIFE
CI Interrupter Switch S2
Manual Operating Lever
Interrupting Switch
Manual Spring
Charge Operator
CI Interrupter Switch S1
Operation Counter
Interrupting Switch
Spring Charge
Indicator
CI Interrupter Switch S1
Status Indicator
Nameplate
CI Interrupter Switch S1
Manual Operating
Lever
One-line
Diagram
Type S
Transfer
Control
Enclosure
Source 2 Bushings
Source 1 Bushings
Potential Transformer
Dead-break Disconnect Switch
Figure 4.
PST-9 Source-Side Features.
00016KM
Pressure Relief Valve
VFI Interrupter
Operating Handle
Oil Fill Plug
Tri-Phase/TPG
Control
VFI Interrupter
Operating Handle
Tri-Phase/TPG
Control
Oil Level
Indicator
One-line
Diagram
Oil Drain
Plug and
Sampler
Tap 1 Bushings
Figure 5.
PST-9 Tap-Side Features.
1/2 - 13UNC
Stainless Steel
Ground Nut - Typ.
Tap 2 Bushings
02030KM
5
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
ANSI standard C57.12.28. Tank construction is of 10gauge steel, and doors are made of 12-gauge steel.
Recessed lifting provisions are provided at each corner
of the tank for a balanced lift.
Side-hinged, cabinet style doors are provided with door
stays and fitted with stainless steel hinges. Both source
and tap doors can be fully open at the same time. Each
door has a floating lock pocket with padlock provisions
and penta-head silicon bronze door bolt.
Cabinet Finish
PST-9 switchgear is finished in a green color, which conforms to Munsell 7GY 3.29/1.5 Green.
The coating conforms to the following specifications:
ANSI standard C57.12.28, ASTM B1117 1000-hour 5%
salt spray corrosion test, ASTM D2247 1000-hour humidity test, ASTM G53 500-hour ultraviolet accelerated
weathering test, and ASTM D2794 impact test.
Figure 6.
CI Interrupter Switch Trip-Reset Lever.
00018KM
Interrupter Duty Cycle
The CI and VFI interrupter mechanism conforms to the
duty cycle requirements of ANSI C37.60.
Switch Test Sequence
The VFI operating mechanism conforms to the switch
test sequence requirements of ANSI C37.72.
Nameplate
Prior to installation, check the nameplate ratings. Verify
the overall current and voltage ratings, transformer ratings and one-line diagrams are correct for the planned
installation.
Operating Handles
WARNING: Hazardous voltage. Never rely on
the open position of the operating handle or the
contact position indicator; it does not ensure that the
line is de-energized. Follow all locally approved safety
practices. Failure to comply can result in contact with
high voltage, which will cause death or severe personal injury.
G123.1
!
Type PST-9 switchgear is equipped with shotgun stick
operable loadbreak switch handles for operation of the CI
source-side and VFI tap-side interrupter switches.
The operating handle of CI interrupter switches provides
incremental travel between the trip, close, and reset
positions of the switch (Figure 6). CI interrupter trip-reset
levers may be padlocked in the tripped position.
The Type VFI interrupters are equipped with hotstickoperable handles that are located on the tap-side of the
unit. VFI operating handles are factory configured for
either ganged three-phase operation (all three phases
operated simultaneously with a single handle) or singlephase operation (each phase operates independently).
The operating handle (Figure 7) provides convenient
push-to-close and pull-to-open operation. VFI operating
handles may be padlocked in the open position.
6
931158KMA
Figure 7.
VFI operating handle, three-phase ganged operation.
Weight
The weight of the switchgear is shown on the nameplate.
Make sure that lifting equipment used is rated sufficiently to safely handle the switchgear.
!
S285-60-1
SAFETY
FOR LIFE
RATINGS AND SPECIFICATIONS
Table 1
Electrical Ratings PST-9 Transfer Switchgear
Description
Maximum Design Voltage, kV . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
BIL, kV . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-Minute Withstand Voltage (60 Hz) Interrupter and Terminators, kV
Continuous Current (max), A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interrupting Current (sym./asym.), kA . . . . . . . . . . . . . . . . . . . . . . .
Momentary Current 10 cycles (asym.), kA . . . . . . . . . . . . . . . . . . . .
3 Second Withstand Current (sym.), kA . . . . . . . . . . . . . . . . . . . . . .
Making Current (sym.), kA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Transformer Magnetizing Interrupting Current, A . . . . . . . . . . . . . . .
Cable Charging Interrupting Current, A . . . . . . . . . . . . . . . . . . . . . .
Table 2
Interrupting Duty Cycle
Percent of Interrupting
Current Rating
15 - 20
45 - 55
90 - 100
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15kV
25kV
35kV
15.5
95
34
600
12/20
20
12
12
21
10
27
125
40
600
12/20
20
12
12
21
25
38
150
50
600
12/20
25
12
12
21
40
Table 3
Switching and Transfer Times
Number of
Operations
Direction of
Transfer
88
112
32
232 Total
Preferred to Alternate
Alternate to Preferred
Alternate to Preferred
Type of Return
Transition
First Interrupter
Reaction Time *
(Cycles)
Transition
Time**
Cycles
Non-Parallel
Non-Parallel
Parallel
2.0 to 3.0
2.0 to 3.0
5.0 to 6.0
5.0 to 6.0
5.0 to 6.0
2.0 to 3.0
* Time from expiration of time delay to first opening (or closing) of high-voltage
interrupter. Add about 1 cycle to values shown to allow for S control relay time.
* * Time load tap is disconnected or parallel, dependant upon transition used.
All Cabinets
48" High
Table 4
Overall Dimensions
15/25 kV
35 kV
Bushing Rating
Source / Tap
A
B
C
D
600 A / 200 A
95
70
36
16
600 A / 600 A
101
70
36
22
200 A / 200 A
89
70
30
16
600 A / 200 A
103
70
40
20
600 A / 600 A
109
70
40
26
200 A / 200 A
97
70
34
20
Tap Cabinet
Overall Rating
Source Cabinet
Dimensions (in)
Unit Description
C
30"
32
A
B
D
30"
7
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
LOAD TRANSFER FUNCTIONALITY
TYPE S Automatic Load Transfer
Control Operation
The Type S Load Transfer Control monitors the source
voltage taps and provides the timing and control logic
required to perform the automatic load transfer in the
event of a voltage loss. The control commands the operations of the two Type CI interrupter source switches during auto transfer.
The three-phase voltage on Source I and Source II is
sensed by 6 internal potential transformers (Figures 8
and 10). The control senses and interprets 85 percent of
applied voltage and above as normal voltage and 65 percent of applied voltage and below as loss of voltage.
When the value of the preferred source drops below 65
percent, the S Control initiates a programmed transfer of
the load to the alternate line source.
The face of the control (Figure 9) provides visual indication of the status of each Cl interrupter, control settings,
and manual operation capabilities. The transfer operation
is programmed on the control panel; digital timer settings
and switch settings permit complete program flexibility to
coordinate with other system operating parameters.
The control requires 120 Vac, 50/60 Hz, 500 VA to operate the transfer switches. Quiescent power dissipation at
120 Vac is 18 watts. No external source of power is
required for the control as the 120 Vac power requirement is supplied by the B-Phase (Source I) and Y-Phase
(Source II) inputs from the internally mounted potential
transformers.
Preferred Mode Operation
The following is a typical Preferred Mode automatic
load-transfer sequence (Figure 8):
The load is transferred to the alternate source, after
completing a preset time delay, when one or more
phases of preferred source voltage is lost and normal
voltage is present on the alternate source.
The load is then transferred back to the preferred source,
after completing a preset time delay, when normal voltage is restored to the preferred source. The return transfer can be either non-parallel (NP) in which the alternatesource switch opens before the preferred-source switch
closes, or parallel (P) in which the preferred-source
switch closes before the alternate-switch opens. With
parallel return, the second outage is eliminated; however,
both sources must be in phase. The return-transfer mode
is selected by setting the Source Preference Switch (S4).
CAUTION: Equipment misoperation. Source I and
Source II high voltage switches can be paralleled in the
manual operation mode even if SOURCE PREFERENCE switch, S4, is set for NP (non-parallel operation). Make sure both sources are in synchronism if a
manual parallel operation is to be performed. Failure to
comply can result in misoperation (unintended operation) and equipment damage.
T304.0
CI Switch
CI Switch
S
Control
S1
Preferred
Source
N.O.
N.C.
VFI
VFI
Tri-Phase/TPG
Control
T1 T2
Sequence 1:
Tri-Phase/TPG
Control
PST-9 Unit during normal
operating conditions
Closed
CI Switch
Open
CI Switch
S
Control
S1
Preferred
Source
VFI
VFI
Tri-Phase/TPG
Control
T1 T2
Sequence 2:
S2
Alternate
Source
Tri-Phase/TPG
Control
PST-9 Unit switched to alternate
voltage source after loss of
preferred voltage source
CI Switch
CI Switch
S
Control
S1
Preferred
Source
N.O.
N.C.
VFI
Tri-Phase/TPG
Control
Sequence 3:
VFI
T1 T2
S2
Alternate
Source
Tri-Phase/TPG
Control
PST-9 Unit after restoration of
preferred voltage source
Figure 8.
PST-9 Load Transfer Functionality.
8
S2
Alternate
Source
!
S285-60-1
SAFETY
FOR LIFE
SWITCH I STATUS
INDICATOR LAMPS
LAMP TEST
SWITCH
SWITCH II STATUS
INDICATOR LAMPS
ALTERNATE TO
PREFERRED TIMER
PREFERRED TO
ALTERNATE TIMER
MANUAL OPERATION
SOURCE I AND
SOURCE II SWITCHES
(S1, S2)
OPERATION SELECTOR
SWITCH (S3)
SOURCE I
ENERGIZED LAMP
SOURCE II
ENERGIZED LAMP
CONTROL MODE
SWITCH (S5)
SOURCE PREFERENCE-AND-RETURN
MODE SELECTOR
SWITCH (S4)
FUSES
Figure 9.
Type S Transfer Control Front Panel Details.
00019KM
Either Source I or Source II can be selected as the
preferred (PREF 1 or PREP II) source by setting the
Source Preference-and-Return Mode Selector Switch
S4.
ferred source. Moving Control Mode switch S5 to the
NORMAL position during return sequence inhibition will
cause immediate return to the Preferred Source.
No Preference Operation
Each switch can be independently opened and closed
manually by setting Operation Selector Switch S3 to
MANUAL and operating MANUAL OPER. SOURCE S1
and MANUAL OPER. SOURCE S2 switches as required.
When either source is acceptable for continuous critical
load supply, the Source Preference-and-Return Mode
Selector Switch S4 may be set to the No Preference
Operation (NO PREF) position. Upon loss of Source I
voltage, and after a preset time delay, the load is automatically transferred to Source II if normal voltage is present on Source ll. However, the load is not transferred
back when Source I voltage is restored, but remains on
Source II indefinitely, until a loss of voltage on Source II
initiates an automatic transfer to Source 1.
Hold on Alternate Operation
For some loss-of-voltage protection schemes it may be
preferable to inhibit return to the preferred source from
the alternate source upon restoration of the preferred
source voltage. By placing Control Mode switch S5 into
the HOLD ON ALTERNATE position, manual operation
of the switches is required to transfer back to the pre-
Manual Operation
CAUTION: Parallel connection of sources is possible
when manually closing CI interrupters. If parallel connection of sources is not desired do not operate the
trip-reset levers of both CI interrupters into the closed
position.
T275.0
IMPORTANT: If Control Mode Switch S3 is placed in
the “AUTO” position, the S-control will place the highvoltage Type CI transfer switches into the configuration
that is currently selected by the Source Preference
Switch S4. This may result in an unintended transfer.
Make sure the desired state of the high-voltage Type
CI transfer switches match the setting of S4 before
returning S3 to the “AUTO” position.
9
Figure 10.
PST-9 Automatic Source Transfer Switchgear Schematic.
To TPG Control
Receptacle "CT 1"
To S Control
Receptacle "SW"
10
PT
SW
CT
To S Control
Receptacle "PT"
D
H
B
A
C
F
G
E
K
H
G
M
L
J
D
B
A
F
E
C
G
M
L
N
H
B
A
K
J
C
F
D
E
GRY
YEL
RED
BRN
VIO
ORG
BLU
GRN
BLK
GRY
WHT/RED
VIO
WHT/BRN
WHT
YEL
RED
BRN
BLU
GRN
ORG
VIO
7
8
6
3
4
5
1
2
TB3
9
10
4
5
6
7
8
3
1
2
TBC2
9
10
6
7
8
5
4
1
2
3
TBC1
C ø F.S.T. (–)
C ø F.S.T. (+)
WHT/ORG
WHT/RED
GRY
B ø F.S.T. (–)
B ø F.S.T. (+)
A ø F.S.T. (–)
A ø F.S.T. (+)
RED
BRN
WHT/BRN
BLK
WHT
– TC +
M
CI
Interrupter
#1
BLU
C. T. PROT
R
(NO)
LS3
CC
(NC)
(NO)
(NO)
(NC)
LS2
LS4
LS2
LS3
– TC +
R
(NO)
LS3
CC
(NC)
(NO)
(NO)
(NC)
LS2
LS4
LS2
LS3
M
LS1
(NC)
(NC)
(NC)
(NC)
LS1
LS4
CI
Interrupter
#2
LS4
BRN
RED
ORG
YEL
GRN
Aø
Bø
Cø
WHT
TB3-2
TB3-1
TB3-7
TB3-6
TB3-5
TB3-4
TB3-3
BLK
BLK
WHT
BLK
WHT
H1
X1
RED
RED
RED
Aø
F.S.T.
–
X1
Bø
F.S.T.
–
X1
Cø
F.S.T.
–
X2
Phase
Current
Sensors
–
Cø
F.S.T.
–
Bø
F.S.T.
–
Aø
F.S.T.
X1
X2
H2
S1A
CI
Interrupter
#1
X2
Aø
VFI
Interrupter
#2
+
H1
+
S1B
H2
X2
X2
Bø
X1
H1
+
X1
S1C
H2
X2
X2
Cø
H2
S2C
H1
X1
H2
X2
X2
Cø
X1
+
S2B
H1
X1
H2
X2
X2
Bø
X1
+
S2A
H1
X1
X2
CI
Interrupter
#2
VFI
Interrupter
#1
Aø
X1
+
WHT
BLK
BLK
WHT
BLK
WHT
RED
RED
RED
C. T. PROT
Aø
Bø
Cø
BLU
BRN
RED
ORG
YEL
GRN
WHT/RED
WHT/ORG
WHT
GRY
WHT/BRN
BLK
RED
BRN
ORG
BLK
BLK
BLK
BLK
ORG
GRN
T1A
BLU
YEL
T1B
BLK
T1C
BLK
T2C
GRN
T2B
BLU
YEL
T2A
VIO
C ø F.S.T. (–)
C ø F.S.T. (+)
B ø F.S.T. (–)
B ø F.S.T. (+)
A ø F.S.T. (–)
A ø F.S.T. (+)
G
M
L
N
H
B
A
K
J
C
E
F
D
CT
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
To TPG Control
Receptacle "CT 2"
!
S285-60-1
SAFETY
FOR LIFE
Operation of Interval Timer
Table 5
Time Ranges of Interval Timer
IMPORTANT: Put control in manual mode prior to
changing timer setting. There is no loss of voltage protection when in manual mode. Failure to comply can
cause unintended operation.
The Type S automatic load transfer control features two
digital timers with automatic reset. One timer controls the
time required to transfer from the preferred source to the
alternate source, the other timer controls the time to
transfer from the alternate source to the preferred
source. Each timer can be set for a minimum delay setting ranging from .01 seconds to 99.9 hours.
The time-delay setting for preferred-to-alternate-source
transfer must be long enough to allow discrimination
between permanent loss of voltage and temporary loss of
voltage due to transient effects or reclosing intervals of
backup protective reclosers or breakers.
The time delay for return from alternate to preferred source
upon restoration of preferred-source voltage should be set
for an interval long enough to assure that service on the
preferred source has been permanently restored.
When the S load-transfer control is programmed to operate in the no-preference mode, there are no preferred or
alternate sources. Time-delay intervals for transfer from
Source I to Source ll are governed by the left preferred-toalternate timer and for transfer from Source ll to Source I
by the right alternate-to-preferred timer.
The two digital timers used on the S Control feature the
following informational indicators and adjustment controls:
OUT Indicator
OUT
Digital Time
Display
3.45
39 4
9 5
999
S
Thumbwheel
Time Setting
9.99
99.9
999
99.9
999
99.9
Indication
S
S
S
M
M
H
Time
Range
0.01
to
9.99
sec
0.1
to
99.9
sec
0.1
to
999
sec
0.1
to
99.9
min
1
to
999
min
0.1
to
99.9
hour
Adjustment of Time Delay Settings
IMPORTANT: Care must be taken while making
adjustments to the thumbwheel time selector
switches. Incomplete setting may cause timer
malfunction and control misoperation.
Time delay settings are made by rotating the thumbwheel
selector switches to the desired numeric time setting
(Figure 11). For example, if the thumbwheel time setting
is 345 the timer will time out in 34.5 seconds based off
the time range selector setting of 0.1 to 99.9 seconds.
After setting the desired time setting, re-check the time
range and decimal point position to verify that the time
setting you have entered is correct.
Note:
The thumbwheel time setting, which does not turn infinitely, should not be turned beyond the limit.
Out Indicator Function
The out indicator briefly lights to signal completion of a
timing interval and confirm that the timer has operated.
For additional information regarding the operation and
adjustment Kyle S Control refer to Service Information
Bulletin S260-75-1, Kyle Type S Automatic Transfer
Control Installation, Operating and Maintenance
Instructions.
Decimal Point
Indicator
Time Range
Selector
Figure 11.
S Control Timer Details.
Digital Time Display
LED display of timer operation. Displays time count.
Timer counts up until it reaches the time delay setting
that was programmed with the thumbwheel switches.
Time Range Selector
The time range selector is used to select the range and
the units of time (Figure 11). Use a small flat blade screwdriver to rotate the selector to the desired setting. For a
specific unit of time (seconds, minutes, or hours) the
range selected is indicated by the position of the decimal
point indicator just above the selector window. The available ranges are shown in Table 5.
11
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
CI Interrupter Switch
Type CI three-phase motor-operated source transfer interrupter switches (Figure 12) employ long-life vacuum interrupters. The vacuum interrupter contacts are opened and
closed by a mechanism that releases stored spring energy.
The separate opening and closing springs are automatically charged by a 120-Vac motor. The load transfer interrupter
switches are electrically operated, receiving trip or close
signals from the S automatic load transfer control.
Solenoids receive the command signals and release the
charged springs to effect a quick open or quick close
operation of the vacuum contacts.
Figure 14.
Manual Push-Pull Spring Charging Operator.
00023KM
Operating Modes
The Cl switches can be tripped automatically, electrically,
or manually operated; they can be closed electrically or
manually provided the springs are charged. CI switch
operating modes are:
AUTOMATIC
Figure 12.
CI Interrupter Switches.
00022KM
CI interrupting switches can be manually operated for
test purposes or if operating power is lost. A hotstick
operable, external trip-reset lever (Figure 13) allows
switches to be opened and closed manually. An external
push-pull operator is provided for manually charging the
springs (Figure 14). The push-pull operator is easily
operated with a shotgun stick.
The CI Interrupter Switch Trip-Reset Levers (S1 and S2)
must be in the RESET position for automatic load transfer control operation to occur. Tripping and closing of the
CI transfer switches is initiated by a signal from the Type
S Transfer Control. An opening signal briefly energizes
the opening solenoid, releasing a latch and thus tripping
the opening springs. A closing signal energizes the closing solenoid, tripping the closing spring. Closing is not
permitted until the limit switch closes to indicate that the
springs are charged. Automatic closing provision is not
included.
ELECTRICAL
Non-automated opening and closing are initiated by
operation of the open-close toggle switches SW1 and
SW 2 (Figure 9) on the S Transfer Control front panel.
Non-automated electrical opening and closing is permitted only when the S Transfer Control is operating in the
manual mode.
MANUAL
Tripping and closing are initiated by operation of the
manual trip-reset handles located on the source-side
padmount tank.
CI Interrupter Operating Sequences
Figure 13.
CI Interrupter Switch Trip-Reset Lever.
00018KM
When the interrupter contacts are open and the 120 Vac
supply to the spring charging motor is energized, the
spring charging motor will charge the closing and opening springs. The CI Interrupters Trip-Reset Levers (S1
and S2) must be in the RESET position for this operation
to occur. Upon receipt of a closing signal, a solenoidoperated latch releases the closing spring which drives
the three vacuum interrupter contacts to their closed
position.
As the contacts are closed, the closing spring energy is
12
!
S285-60-1
SAFETY
FOR LIFE
fully discharged while the opening spring remains
charged and latched. Upon receipt of an opening signal,
a solenoid releases the opening-spring latch and the contacts of all three vacuum interrupters are simultaneously
driven to their open position as the opening spring fully
discharges. Immediately after the contacts reach full
open, the spring charging cycle is repeated as the spring
charging motor runs to recharge the springs. Recharging
is completed in 20 seconds and both closing and opening springs are then latched and ready for future operations. Should the 120-volt motor power be lost while the
interrupter contacts are open but after the springs have
been charged, one contact closing operation can still be
achieved through use of the trip-close handle on the
mechanism tank. Likewise, after the interrupter has been
closed, energy for one trip operation remains stored in
the mechanism.
Manual Operation of CI Interrupters
With its manual spring-charging capability the Cl interrupter switches can be operated without the presence of
the low-voltage motor supply from the S Control.
WARNING: Hazardous voltage. Contact with
high voltage will cause death or severe personal
injury. Follow all locally approved safety procedures
when working around high and low voltage lines and
equipment.
G103.3
!
WARNING: Hazardous voltage. Never rely on
the open position of the operating handle or the
contact position indicator; it does not ensure that the
line is de-energized. Follow all locally approved safety
practices. Failure to comply can result in contact with
high voltage, which will cause death or severe personG123.1
al injury.
!
CAUTION: Equipment misoperation. Source I and
Source II high voltage switches can be paralleled in the
manual operation mode even if SOURCE PREFERENCE switch, S4, is set for NP (non-parallel operation). Make sure both sources are in synchronism if a
manual parallel operation is to be performed. Failure to
comply can result in misoperation (unintended operation) and equipment damage.
T304.0
Manual Closing Of CI Interrupter
CAUTION: Parallel connection of sources is possible
when manually closing CI interrupters. If parallel connection of sources is not desired, do not operate the
trip-reset levers of both CI interrupters into the closed
position.
T275.0
2. Observe the CI interrupter spring status indicator. If
the indicator shows the springs are discharged, proceed with step 3. If the indicator shows springs are
charged, proceed to step 5.
3. Move the CI Transfer Switch Trip-Reset lever to the
TRIP position and then to the RESET position.
4. Using a shotgun stick, pull the spring charging handle
approximately 30 times, or until the spring charging
indicator switches from the white, "spring discharged"
to the yellow, "springs charged" position.
5. Move the Trip-Reset lever to CLOSE. Interrupter
contacts will close and handle will spring back to the
RESET Position.
IMPORTANT: Return of the S-Control Mode Switch S3
to the “AUTO” position, upon completion of manual CI
switching operations, will place the high-voltage transfer switches into the configuration presently selected
by Source Preference Switch S4. This may result in an
unintended transfer. Make sure the desired state of the
high-voltage CI transfer switches match the setting of
S4 before returning S3 to the “AUTO” position.
Manual Tripping of CI Interrupter
1. If the S control is in service, move the S Control
Operation Selector toggle switch S3 to the MANUAL
position to eliminate any unanticipated opening and
closing of the CI source switches when Vac supply is
restored.
2. Move the CI interrupter switch lever to the TRIP position. This action will release a trip in the operating
mechanism, allowing the charging springs to drive the
contacts to their open position. The trip-reset lever
will remain in the TRIP position.
The interrupter can not be closed by the S Control while
the Trip-Reset Lever is in the TRIP position.
IMPORTANT: Return of the S-Control Mode Switch S3
to the “AUTO” position, upon completion of manual CI
switching operations, will place the high-voltage transfer switches into the configuration presently selected
by Source Preference Switch S4. This may result in an
unintended transfer. Make sure the desired state of the
high-voltage CI transfer switches match the setting of
S4 before returning S3 to the “AUTO” position.
For additional information regarding the operation and
adjustment of Type CI Vacuum Interrupters Switches
refer to Service Information Bulletin S275-10-1, Kyle
Type CI Three-Phase Fault Interrupters Installation and
Operation Instructions.
Manual closing during loss of 120 Vac supply can be
accomplished by using the following procedure:
1. If the S Control is in service, move the S Control
Operation Selector toggle switch S3 to the MANUAL position to eliminate any unexpected opening and closing of
the CI source switches when Vac supply is restored.
13
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
OVERCURRENT PROTECTION FUNCTIONALITY
Tri-Phase/TPG Electronic Trip
Control
The Tri-Phase Control and Tri-Phase with Ground Trip
Control (TPG) (see Figures 15 and 16) are comprised of
solid-state circuit boards and “plug-in” type time current
curve (TCC) cards. Controls include DIP switches on the
control circuit board and provide means to program control operation. Tri-Phase Control settings include unique
minimum trip levels for each phase, activation and programming of the instantaneous trip feature, and selection
between single and three-phase tripping.
TPG Control Settings include unique minimum trip levels
for each phase and minimum trip levels for ground, a
ground trip block ON/OFF switch, activation and programming of the instantaneous trip feature for both
phase and ground, and selection between independent
or three-phase ganged tripping.
On both controls, independent trip operation is only possible when operating a Kyle VFI or PST-9 that is
equipped with three individual single-phase trip handles.
When line current, on any phase, exceeds the programmed minimum trip level, the Tri-Phase or TPG electronic control issues a trip signal, which causes the
switchgear to trip open.
Ground Trip
Block Switch S7
Figure 15.
TPG Control (Tri-Phase Control not shown).
98009KM
In VFI applications with three single-phase trip handles,
the control can be switched for single-phase operation.
This mode allows independent interruption of the faulted
phase(s). When switched for three-phase operation, a
fault detected on any phase causes the simultaneous
interruption of all three phases.
Both controls make use of internally mounted 1000:1
ratio current sensing transformers (CT) to monitor line
current. If the current sensed is greater than the programmed minimum trip level, the control will begin a
user-selectable TCC delay. At the completion of the time
delay, a signal is issued which causes the fault interrupting switchgear to trip.
Controls are powered by system current, via the CTs.
The controls require no external voltage supply or battery
backup and are not affected by system voltage conditions (such as overvoltage transients).
TPG controls make use of the same internally mounted
1000:1 ratio current-sensing transformers (CTs) on each
phase to monitor line current used for phase tripping.
Additional CTs are not required.
If the Ground Trip feature is activated when phase imbalance exceeds the programmed minimum trip level, the
TPG electronic control issues a trip signal, causing the
VFI mechanism to trip OPEN.
The Ground trip feature of the TPG control may be
blocked by setting Ground Trip Block Switch S7 (Figure
15), located on the TPG board, to the “On” position. If the
Ground Trip feature is not blocked, then a permanent
phase current imbalance that exceeds the programmed
minimum trip level will cause the control to time-out and
issue a trip signal.
14
01082KM
Figure 16.
TPG Control Enclosure on Inside of Tap-Side Door.
For additional information regarding the operation and
adjustment of Kyle Tri-Phase and TPG Controls refer to
Service Information Bulletin S285-75-1, Kyle Tri-Phase,
TPG, and TPG w/SCADA Electronic Control Installation
and Operation Instructions.
!
S285-60-1
SAFETY
FOR LIFE
VFI Vacuum Fault Interrupters
Type VFI vacuum interrupters provide fault current
interruption and load make/break switching capabilities.
Shotgun stick operable operating handles are located on
the front plate of the unit. VFI operating mechanisms can
be factory configured for either single- or ganged threephase operation.
WARNING: Hazardous Voltage. Always use a
shotgun stick when working with this equipment.
Failure to do so could result in contact with high voltage, which will cause death or severe personal injury.
!
G108A.0
The VFI operating handles (Figures 5 and 18) are
located on the tap-side, front plate of the PST-9 unit. The
VFI operating handles must be operated with a shotgun
stick.
Opening VFI Interrupters
Flux Shift
Tripper
The VFI vacuum fault interrupter is opened by pulling the
operation handle down to the open position. The handle
may be padlocked in the open position to prevent accidental closure.
Vacuum
Interrupter
Figure 17.
Vacuum interrupter assembly.
911072KMA
Current sensing transformers, located inside the
switchgear tank, provide line current information to the TriPhase or TPG control. When line current exceeds the minimum trip setting the control initiates a signal, which causes the VFI to interrupt the circuit. Interruption may be single- or three-phase, depending upon the configuration of
the control and VFI interrupter.
Manual VFI Operation
931158KMA
Figure 18.
VFI operating handle, three-phase ganged operation.
Resetting VFI Interrupters
WARNING: Hazardous voltage. Contact with
high voltage will cause death or severe personal
injury. Follow all locally approved safety procedures
when working around high and low voltage lines and
equipment.
G103.3
After the VFI mechanism has tripped, as the result of a
fault condition, the mechanism must be reset before it
can be closed. To reset the mechanism, firmly pull the
operating handle down toward the ground until the latch
resets. After the latch has been successfully reset, the
VFI interrupter mechanism can be closed normally.
WARNING: Hazardous voltage. Never rely on
the open position of the operating handle or the
contact position indicator; it does not ensure that the
line is de-energized. Follow all locally approved safety
practices. Failure to comply can result in contact with
high voltage, which will cause death or severe personal injury.
G123.1
Closing VFI Interrupters
!
!
WARNING: Do not operate this equipment out
of oil. Oil is the electrical insulating medium within this equipment; operation out of oil will result in internal flashovers that will damage the equipment and can
cause death or severe personal injury.
G104.2
!
The VFI vacuum fault interrupter is closed by briskly
pushing the handle up, into the closed position.
For additional information regarding the operation of Kyle
Type VFI Vacuum Fault Interrupters, refer to: Service
Information Bulletin S285-10-1, Kyle Type VFI, Oil
Insulated, Vacuum Fault Interrupter; Installation,
Operation, and Maintenance Instructions.
15
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
INSTALLATION PROCEDURES
WARNING: This equipment is not intended to
protect human life. Follow all locally approved procedures and safety practices when installing or operating this equipment. Failure to comply can result in
death, severe personal injury, and equipment damage.
!
CAUTION: Follow all locally approved safety practices when lifting and mounting the equipment. Use the
lifting lugs provided. Lift the unit smoothly and do not
allow the unit to shift. Improper lifting can result in
equipment damage.
G106.2
G102.1
1. Check oil level. Make sure the oil in switchgear tank
is at the proper level by checking the oil level indicator on the source-side and tap-side panels; both indicators should be at the proper level.
CAUTION: Equipment damage. Never place jacks,
tackle or other attachments under the unit for the purpose of lifting. Failure to comply will result in damage
to the equipment.
T240.0
2. Test oil dielectric strength. If the switchgear has been
stored for some time, or is being relocated, perform a
dielectric test on the oil in accordance with ASTMapproved testing procedures.
4. Mount switchgear on concrete pad.
NOTE: R-TEMP® or Envirotemp® FR3™ dielectric fluid
may be provided instead of insulating oil, if specified at
the time of order. Refer to manufacturer’s instructions for
specifications and ASTM-approved testing procedures.
CAUTION: The use of R-TEMP® and Envirotemp®
FR3™ dielectric fluids is limited to a minimum operating temperature of 0 C°(32° F).
T307 .0
CAUTION: This equipment relies on oil to provide electrical insulation between components.
The dielectric strength of the oil must be checked on a
regular basis, as part of the routine maintenance
inspection, to ensure that it is at or above minimum
dielectric requirements. Use of this equipment with
insulating oil that does not meet minimum requirements can result in internal flashovers that will damage
the equipment and can cause personal injury.
G107.2
A. The switchgear must be installed on a level concrete pad or structure that has been designed to
support the size and weight of the unit.
B. The switchgear must be hoisted only by the
recessed lifting provisions provided at the four corners of the tank. Suitable lifting straps must be
used to prevent damaging the switchgear housing.
WARNING: Hazardous voltage. Solidly ground
all equipment. Failure to comply can result in
death, severe personal injury, and equipment damage.
!
T223.2
!
A. In new equipment, the oil must have a minimum
dielectric strength of 26 kV. If the dielectric strength
of the oil is less than 26 kV, filter the oil to restore
its dielectric strength to acceptable minimum level.
B. For additional information on oil specifications and
tests, refer to Reference Data R280-90-1 and to
the oil testing procedures detailed on pages 20-22
of this manual.
3. Check the nameplate ratings. Verify the overall
current and voltage ratings, transformer ratings and
one-line diagrams are correct for the planned
installation.
5. Ground switchgear. Switchgear must be adequately
grounded. Make a permanent, low-resistance,
ground connection at the 1/2”-13 UNC connectors
located at the bottom of the switchgear front plates
(refer to Figure 5). The Type S automatic load transfer control is grounded to the source-side front plate
of the switchgear tank with a woven grounding cable.
6. Make high-voltage line connections.
A. Prior to making connections, verify the source-side
preferred and alternate elbows, and tap-side
elbows are correctly identified. Verify the PST-9
unit is oriented correctly for the installation; the
source leads must connect to the source bushings,
tap leads must connect to the tap bushings of the
unit.
B. Refer to the operation one-line diagram located
inside the doors of the switchgear and make only
those elbow connections shown. The voltage and
current ratings shown on the nameplate must be
correct for the planned installation.
C. All cables or bushings not in use must be properly
isolated from all other leads. Unused leads must
be parked on standoff insulators, or properly
grounded using an elbow grounding kit
7. Close and lock switchgear doors. Switchgear doors
must be closed and locked in order to prevent unauthorized access and accidental contact with high voltage.
16
!
S285-60-1
SAFETY
FOR LIFE
Initial Mechanical Operation
Check
2. Verify CI interrupter springs are discharged by moving
both yellow Trip-Reset levers to the CLOSE position.
WARNING: Hazardous voltage. Contact with
high voltage will cause death or severe personal
injury. Follow all locally approved safety procedures
when working around high and low voltage lines and
equipment.
G103.3
!
WARNING: Hazardous voltage. Never rely on
the open position of the operating handle or the
contact position indicator; it does not ensure that the
line is de-energized. Follow all locally approved safety
practices. Failure to comply can result in contact with
high voltage, which will cause death or severe personal injury.
G123.1
!
3. If CI interrupter switch S1 is closed, open it by operating the yellow trip-reset lever above the S1 bushing
to the TRIP position. Position indicator will show a
green OPEN flag (Figure 13).
4. Move the yellow trip trip-reset lever to the RESET
position.
5. Pull the spring charging operator handle approximately 30 times, or until the spring charging indicator
switches from the white, "spring discharged" to the
yellow, "springs charged" position (Figure 20).
WARNING: Do not operate this equipment out
of oil. Oil is the electrical insulating medium within this equipment; operation out of oil will result in internal flashovers that will damage the equipment and can
cause death or severe personal injury.
G104.2
!
WARNING: Hazardous Voltage. Always use a
shotgun stick when working with this equipment.
Failure to do so could result in contact with high voltage, which will cause death or severe personal injury.
!
G108A.0
With the PST-9 unit out of service and completely deenergized conduct the following test:
1. At the SW receptacle of the S-Control disconnect the
cable connecting to the corresponding SW receptacle
located on the source-side front plate of the tank
(Figure 19).
Figure 20.
Push-Pull Charge Spring Operator Indicator before
and after manual charging of CI Interrupter Switch.
6. Move the yellow trip-reset lever to the CLOSE position.
7. Switch S1 should close with an audible "thunk" and
position indicator should switch to a red "closed" flag.
9. Repeat steps 2-6 for CI interrupter switch S2.
PT
10. Re-connect the cable previously disconnected
between source-side tank receptacle SW and
S Control enclosure receptacle SW.
SAFETY
INSTRUCTIONS
PT
00023KM
8. Move the yellow trip-reset lever to the TRIP position.
Unit should trip open and position indicator should
read open.
SW
S Control
Enclosure
Panel
00024KM
SAFETY
INSTRUCTIONS
SAFETY
INSTRUCTIONS
SW
Figure 19.
Disconnection of CI Interrrupter Switch Cable at
SW receptacle of S Control enclosure.
17
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
Initial Electrical Operation
Check
Terminal
Strip
TB2
WARNING: Hazardous voltage caused by backfeeding of transformers. Isolate potential transformers from source bushings using potential transformer dead-break disconnect switches located on the
source-side panel. Failure to do will result in risk of
possible contact with high voltage at the source bushings, which may cause death or severe personal injury.
!
T273.0
With the PST-9 out of service and de-energized, isolate
the potential transformers to eliminate risk of contact with
hazardous voltage caused by transformer backfeeding
during testing operations. Isolate the transformers with
the following procedure.
Figure 22.
Location of terminal strip TB2 behind face panel of
Type S Transfer Control.
1. At the PT receptacle of the S Control disconnect the
cable connecting to the corresponding PT receptacle
located on the source-side front plate of the tank
(Figure 21).
A
B
C
G G X
Y
Z
SW
120 VAC
PT
S Control
Enclosure
Panel
Figure 23.
Connection of AC power for initial electrical operation testing of the PST-9 unit.
SAFETY
INSTRUCTIONS
PT
SAFETY
INSTRUCTIONS
3. Jumper terminal Z to Y to X, and C to B to A.
SAFETY
INSTRUCTIONS
SW
Figure 21.
Disconnection of Potential Transformer Cable at PT
receptacle of S Control enclosure panel.
2. Disconnect the switchgear’s internal potential transformer via the six manually operated dead break
switches located below each source bushing
(Figure 4).
3. Install insulating caps on all source and tap bushings.
Verify proper electrical operation using the following procedure:
1. Place the yellow CI Interrupter Switch Trip-Reset
levers, located on the source side panel, into the
RESET position.
2. Connect 120 Vac, 60 Hz power supply to terminals B
and Y of Terminal Strip TB2 of the S Transfer Control.
Connect the grounded side of the power supply to terminal G (Figures 22 and 23).
18
4. The spring charging motor of one or both CI interrupter switches, depending on whether the respective
interrupter springs are charged or discharged, should
begin to operate after completion of steps 1-3. Motor
spring charging takes approximately 30 seconds.
!
SAFETY
FOR LIFE
S285-60-1
Initial S Control Operation
Check
CAUTION: Equipment misoperation. Source I and
Source II high voltage switches can be paralleled in the
manual operation mode even if SOURCE PREFERENCE switch, S4, is set for NP (non-parallel operation). Make sure both sources are in synchronism if a
manual parallel operation is to be performed. Failure to
comply can result in misoperation (unintended operation) and equipment damage.
T304.0
To place the Type S Transfer Control into service, proceed as follows:
1. The switches on the S-Control front panel should be
positioned as follows:
A. S1 (MANUAL OPER. SOURCE 1)— OFF
B. S2 (MANUAL OPER. SOURCE ll)— OFF
C. S3 (OPERATION SELECTOR) — MANUAL
D. S4 (SOURCE PREFERENCE AND RETURN
MODE)—set to the desired mode of operation.
E. S5 (CONTROL MODE)—NORMAL
2. Set the PREFERRED TO ALTERNATE TIMER and
ALTERNATE TO PREFERRED TIMER as required.
3. Make sure both high-voltage CI transfer switches are
open.
4. With all six fuses in place, energize both power
sources to the control.
A. SOURCE I ENERGIZED lamp should be on.
B. SOURCE ll ENERGIZED lamp should be on.
C. SWITCH I OPEN lamp should be on.
D. SWITCH ll OPEN lamp should be on.
5. Depending upon which source is the preferred
source, momentarily operate either S1 or S2 to the
CLOSE position. The appropriate switch will close to
energize the load and its status indicating lights will
transfer from OPEN to CLOSED.
6. Place the OPERATION SELECTOR SWITCH (S3) to
AUTO. The S control is in service. No further operation will occur until the preferred source voltage is
lost.
7. To simulate loss of voltage on any phase of either
source, simply unscrew the appropriate fuse "FU"
from the preferred source, per S4 switch position, and
wait for the digital timer to time out and initiate transfer to the alternate source.
For additional information regarding the operation and
adjustment Kyle S Control Refer to Service Information
Bulletin S260-75-1, Kyle Type S Automatic Transfer Control
Installation, Operating and Maintenance Instructions.
19
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
MAINTENANCE
CAUTION: This equipment requires routine
inspection and maintenance to ensure proper
operation. If it is not maintained, it can fail to operate
properly. Improper operation can cause equipment
damage and possible personal injury.
G105.1
!
CAUTION: This equipment relies on oil to provide electrical insulation between components.
The dielectric strength of the oil must be checked on a
regular basis, as part of the routine maintenance
inspection, to ensure that it is at or above minimum
dielectric requirements. Use of this equipment with
insulating oil that does not meet minimum requirements can result in internal flashovers that will damage
the equipment and can cause personal injury.
G107.2
!
The Type PST switchgear is a deadfront design. All live
parts are contained within the sealed tank enclosure. A
routine maintenance inspection program is required to
ensure proper operation.
It is necessary to establish and maintain a regular schedule for sampling and testing the insulating oil to ensure
proper dielectric strength and to maintain the proper oil
level in the switchgear.
Maintenance Inspection
Procedure
The Type PST switchgear must be de-energized, grounded and removed from service before conducting any
maintenance, oil sampling or oil-filling procedures.
WARNING: Hazardous voltage. This equipment
must be de-energized and grounded prior to conducting any maintenance, oil sampling or oil filling procedures. Failure to comply can result in death or
severe personal injury.
T239.1
!
1. De-energize and ground switchgear.
2. Reduce internal tank pressure to 0 PSIG. The
switchgear is equipped with a pressure relief valve that
opens at 5 PSIG and closes at 3 PSIG. To relieve internal tank pressure pull the ring on the pressure relief
valve.
3. Check oil level. Make sure the oil in the switchgear
tank is at the proper level by checking the oil level indicators located on the source and tap sides of the PST
unit.
NOTE: Refer to Insulating Oil Maintenance, on page 21, for
additional information regarding oil maintenance and
testing requirements.
4. Inspect for damage. Check for unusual wear to the
paint finish. Check bushings and elbows. Make sure
connections are secure. Check for oil leaks or other
unusual or abnormal indications of wear or abuse.
Make sure that cabinet doors will lock securely.
Record any unusual conditions.
20
Internal Inspection and Repair
If internal damage is suspected, or if the switchgear must
be opened for inspection, the following procedure is recommended.
1. De-energize and ground switchgear.
2. Draw an oil sample. Use the drain plug with sampler
at the bottom of the tank. If moisture is found in the
tank, re-fill with clean, dry insulating oil.
3. Clean off tank cover. Take appropriate precautions to
keep dirt, moisture and other foreign matter from
entering tank and contaminate the insulating oil.
4. Remove tank cover.
5. Inspect for internal damage. Check inside the
switchgear for broken leads or loose parts. If any
bushings or interrupters are damaged repair as
required.
6. Bushing repairs. The bushings can be changed with
the tank cover removed.
A. Lower the oil level as needed to make repairs.
Store the drained oil according to locally approved
procedures.
B. Disconnect the internal cables and leads.
C. Unbolt external steel clamps from the front plate
and replace any damaged bushings, or bushing
wells, with new parts and a new gasket. Be sure to
position gasket so it will seal properly.
7. Interrupter repairs. Contact your local Cooper Power
Systems Division sales representative for additional
information and ordering procedures.
8. Replace tank cover. Secure with original hardware.
The cover gasket may be reused if it is not damaged.
9. Re-fill with insulating oil. Refer to the Oil Sampling
and Testing Procedures in this manual and make sure
that the unit is properly filled to the 77° F (25° C) oil
fill level with clean, dry insulating oil.
10. Close and lock doors. After repairs are completed
close and lock switchgear doors, in order to prevent
unauthorized access and accidental contact with high
voltage lines.
!
S285-60-1
SAFETY
FOR LIFE
Insulating Oil Maintenance
Oil Sampling Guidelines
To assure trouble-free operation of this equipment, a regular schedule of oil testing and oil maintenance is
required. A routine oil testing and maintenance schedule
is necessary to monitor changes that occur in the oil as a
result of normal operation and to detect abnormal conditions that may occur.
Use the following oil sampling guidelines in order to prevent contamination of the samples taken:
Maintaining a record of this test data will help in assessing the condition of the oil over time.
Note:
R-Temp® or Envirotemp® FR3™ dielectric fluid may be
provided instead of oil, if specified at time of order.
Refer to manufacturer’s instructions for specifications
and ASTM-approved testing procedures.
Frequency of Maintenance
The insulating oil should be initially tested within two
years after the installation of the equipment. That test will
yield information required to establish a benchmark reference for observing trends in the unit’s normal operation
and to diagnose any fault conditions that may be present.
After the initial oil testing and inspection, vacuum
switchgear should be maintained every six years.
Each scheduled padmounted switchgear maintenance
activity should include a physical inspection of the unit,
an oil level check and oil testing as described in the Oil
Testing section of this manual.
Types of Oil Samples
The unit must be de-energized before collecting an oil
sample. Collecting an oil sample from a unit that has critically low oil level could result in flashover and unit failure
when the unit is re-energized. Never energize this equipment without ensuring that it is filled to the proper oil level
with clean, dry insulating oil.
1. De-energize and ground the switchgear prior to sampling oil.
2. Never collect an oil sample immediately after oil has
been added. A stabilization period of 96 hours is
required prior to sampling.
3. Never sample oil during inclement weather (rain,
sleet, or snow). The oil sample could be contaminated by moisture.
4. Always use the drain plug and sampler, located near
the bottom of the front plate of the tank, to collect oil
samples.
5. Use only approved oil-resistant materials, such as
nitrile rubber or silicone tubing, for sampling the oil.
Use of other materials can result in contamination of
the oil sample.
6. Be careful to prevent contamination of the oil sample
from foreign material such as dirt, dust, chemicals,
etc., in oil carrying and holding apparatus such as oil
cans, transfer tubes, syringes, etc.
7. Upon completion of the sampling, recheck the oil
level, and add oil if required.
Oil Fill Guidelines
The oil level indicator sight gauge on the front plate of the
switchgear provides a convenient method to check oil
level. The indicator provides the correct level for oil at 77°
F (25° C).
If the oil level is low, use the following procedure to add
dry mineral insulating oil to fill the unit to the correct level:
The oil sampling procedure requires that two types of oil
samples be taken.
1. De-energize and ground the switchgear prior to oil
filling.
1. A bulk oil sample to be used for general oil tests.
Approximately one quart (one liter), taken in accordance with ASTM D923 (latest revision), is required.
2. Use only insulating oil that complies with ASTM
D3487 (latest revision). The oil must have a minimum
dielectric strength of 30 kV when tested per ASTM
D877. Never use oil that contains PCB’s
(Polychlorinated Biphenyls).
2. A "gas-tight" oil sample taken in accordance with
ASTM D3613 (latest revision), for diagnosis and fault
gas analysis.
3. Use only transfer equipment that uses oil resistant
materials for hoses, seals, valves, pumps, etc. Failure
to use proper transfer equipment can result in
contamination of the oil.
4. When adding oil, use the oil fill plug located on the
front plate of the unit.
21
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
5. Avoid getting gas bubbles in the oil during filling. Gas
bubbles in the oil can reduce the dielectric strength.
6. When filling is complete, check the oil level gauge to
verify that the oil is filled to the correct level. Allow at
least one hour for gas bubbles to dissipate prior to
energizing the unit.
7. Replace oil fill plug and energize the unit.
8. Record the date and the amount of oil needed to refill the unit; retain information with the permanent
maintenance record of the unit.
Table 7
Dissolved Gas In Insulating Oil Maintenance Chart
Total
Acetylene Level CombustC2H2
ible Gas Required Action
Less than 35 ppm
Less than
500 ppm
Normal Level
Resample per routine
maintenance schedule
35–50 ppm
500 –
1000 ppm
Caution Level
Resample at 3–6 months
to establish trend; main
tain oil if gas levels
increase to hazardous
level.
More than
50 ppm
More than
1000 ppm
Hazardous Level
Remove unit from service
and maintain the oil.
Oil Testing
The insulating oil in this equipment has been tested to
meet the requirements of ASTM D3487, and it has been
processed to remove moisture and dissolved gases. It
must be tested on a regular basis in order to ensure that
it meets those requirements.
Two types of oil tests are required to evaluate and maintain the quality of the insulating oil. They are general oil
tests and dissolved gas analysis.
General Oil Tests
The general oil test requirements are taken from IEEE
Standard C57.106-1991, IEEE Guide for Acceptance and
Maintenance of Insulating Oil in Equipment. The required
oil tests and acceptable limits for service-aged oil are
shown in Table 6.
Oil test results that do not meet the requirements may
indicate a problem with either the oil or the unit. Contact
your Cooper Power Systems representative for technical
assistance.
Table 6
Test Limits for Service-Aged Oil
Oil Test
Dielectric
Strength
Acid Number
Dissipation
Factor
Interfacial Tension
Moisture Content
Method
Requirement
D877
D974
26 kV minimum
0.20 mg KOH/g maximum
D924
D971
D1533
1.0% maximum
24 mN/m minimum
35 ppm maximum
Dissolved Gas Analysis
Dissolved gas analysis is a useful technique for diagnosing abnormal conditions and assessing the “normal” condition of oil in oil-filled equipment. The method employed
is ASTM D3612, which is used in conjunction with
ANSI/IEEE C57.104-1987, IEEE Guide for the Detection
and Determination of Generated Gases in Oil-Immersed
Transformers and their Relations to the Serviceability of
the Equipment. Table 7 provides recommendations on
dissolved gas levels in oil-insulated switchgear.
22
!
S285-60-1
SAFETY
FOR LIFE
TESTING
All padmounted switchgear is carefully tested and adjusted at the factory to operate according to published data.
Well-equipped test facilities, a detailed testing procedure,
and thoroughly trained personnel assure accurately calibrated equipment. Each unit leaves the factory ready for
installation.
Trip Test
The Kyle KSCE11 Tri-Phase Tripper Tester can be used
to verify the operation the VFI trip mechanisms. Contact
your local Cooper Power Systems representative for
tester ordering information. To perform test:
Pre-installation testing is not necessary. However, should
verification of switchgear operation prior to installation be
required, the vacuum interrupters can be tested using the
following procedures
1. De-energize and ground switchgear.
High-Potential Withstand
Testing of Vacuum Interrupters
4. Close VFI trip handles.
High-potential withstand tests can be performed to check
the vacuum integrity of the interrupters used in VFI
switchgear.
Safety Requirements
To prevent accidental contact with high-voltage parts, the
switchgear and high-voltage transformer must be placed
in a suitable test cage and all proper grounding procedures must be observed.
2. Open TPG control enclosure door.
3. Remove cable harness from control circuit board and
attach to tripper tester.
5. Press button for desired phase for one second, VFI
mechanism should trip. Allow two seconds between
tests. Repeat test with other phases, as applicable.
If a VFI interrupter(s) fails to trip properly, check battery in tester and repeat test. If the mechanism still
fails to trip properly, contact your local Cooper Power
Systems representative for additional information and
repair information.
6. Reconnect cable to control circuit board, and close
TPG enclosure door.
WARNING: Hazardous voltage. The switchgear
and high voltage transformer must be in a test
cage or similar protective device to prevent accidental
contact with the high voltage parts. Solidly ground all
equipment. Failure to comply can result in death,
severe personal injury, and equipment damage. T221.3
7. Close and lock switchgear doors, in order to prevent
unauthorized access and accidental contact with
high-voltage lines.
CAUTION: Radiation. At voltages up to the
specified test voltages, the radiation emitted by
the vacuum interrupter is negligible. However, above
these voltages, radiation injurious to personnel can be
emitted. See Service Information S280-90-1, Vacuum
Interrupter Withstand Test Voltage Ratings Information
G109.2
for further information.
Only factory-authorized replacement parts are to be used
for Kyle Distribution Switchgear products. Replacement
parts are available through the factory Service
Department. To order replacement parts, refer to the
nameplate and provide the product type, serial number,
catalog number, voltage rating, and a description of the
part. Contact your Cooper Power Systems representative
for additional information and ordering procedures.
!
!
With the vacuum interrupters open (manual operating
handle(s) in the Open position), perform a high-potential
test for one minute/ac (or 15 minutes/dc) across each
open vacuum interrupter assembly at the voltages shown
in Table 8. The interrupter should withstand the test voltage and should not load down the source.
REPLACEMENT PARTS
Table 8
High-Potential Withstand Test Voltages
VFI Voltage Rating
(kV)
15
25
35
High-Potential
Test Voltages
25.5 kV ac RMS or 37.1 kV dc
30. kV ac RMS or 42.4 kV dc
37.5 kV ac RMS or 74.2 kV dc
23
Type PST-9 Automatic Source Transfer Switchgear Installation, Operation and Maintenance Instructions
!
SAFETY
FOR LIFE
©2002 Cooper Industries, Inc.
Kyle®, R-Temp®, and Envirotemp® are
registered trademarks of Cooper Industries, Inc.
KA2048-0398 Rev: 01
P.O. Box 1640
Waukesha, WI 53187
www.cooperpower.com
KBS
12/02