Reclosers
Service Information
Types VW, VWE, VWV 27kV, and VWVE 27kV
KRW710V Vacuum Interrupter Replacement Kit
S280-30-10
Fuse mounted above
Upper Exchange Plate
on Type VWE Reclosers,
below on Type VW
Reclosers. (High Voltage
Units only)
Long Bushing Lead
Insulating Barrier Plate
Vacuum
Interrupter
Nylon Wire Ties (4)
Lower Double
Stringers
Upper Current
Exchange Plate
Upper Interrupter Clamp
Lower Current
Exchange Plate
Lower Single
Stringer
Lower Interrupter Clamp
Figure 1.
Existing Vacuum Interrupter KA173VS Installation (Type VWE Recloser shown)
Fuse mounted above
Upper Exchange Plate on
Type VWE Reclosers,
below on Type VW
Reclosers. (High Voltage
Units only)
Long Bushing Lead
Insulating Barrier Plate
Lower Double
Stringers
101,6MM (4“)
Approx.
Nylon Wire
Ties (4)
Upper Current
Exchange Plate
Upper Interrupter Clamp
Vacuum
Interrupter
Lower Single
Stringer
Lower Current
Exchange Plate
Lower Interrupter Clamp
Figure 2.
Replacement Vacuum Interrupter VSAM-612-1 Installation (Type VWE Recloser shown).
May1997• Supersedes 9/90
Printed in USA
Types VW, VWE, VWV 27kV and VWVE 27kV; KRW710V Vacuum Interrupter Replacement Kit
!
SAFETY
FOR LIFE
!
SAFETY FOR LIFE
SAFETY
FOR LIFE
Kyle Distribution Switchgear 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 Kyle 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
Following is important safety information. For safe installation and operation of this equipment, be sure to read
and understand all cautions and warnings.
Hazard Statement Definitions
WARNING: Hazardous voltage. Contact with
high voltage will cause death or severe personal
injury. Follow all locally approved safety procedures
when working around high voltage lines and equipment.
G103.2
!
This manual contains two types of hazard statements:
WARNING: Refers to hazards or unsafe
practices which could result in severe personal injury, or death, and equipment damage.
!
CAUTION: Refers to hazards or unsafe
practices which could result in damage to
equipment or in personal injury.
!
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.
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
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
!
2
WARNING: This equipment requires routine
inspection and maintenance to ensure proper
operation. If it is not maintained it may fail to operate
properly. Improper operation can cause equipment
damage and possible personal injury.
G105.1
!
!
S280-30-10
SAFETY
SAFETY
FOR LIFE
LIFE
FOR
Contents
Safety Information ..................................................... 2
Installation ................................................................. 4
Hazard Statement Definitions ................................. 3
Description ............................................................. 4
Safety Instructions................................................... 3
Replacement Instructions........................................ 4
Product Information .................................................. 3
Removing Existing Interrupter ................................. 4
Introduction ............................................................. 3
Installing Replacement Interrupter ......................... 5
Acceptance and Initial Inspection............................ 3
Testing......................................................................... 6
Handling and Storage.............................................. 3
Dielectric Withstand Test ......................................... 6
Description ............................................................. 3
PRODUCT INFORMATION
Introduction
ANSI Standards
Service Information S280-30-10 provides installation
and operating instructions for the Types VW, VWE,
VWV 27kV and VWVE 27kV KRW710V Vacuum
Interrupter Replacement Kit. Before installing and operating this kit, carefully read and understand the contents of this manual.
Kyle reclosers are designed and tested in accordance
with ANSI standards C37.60 and C37.85 and ANSI
guideline C37.61.
The information contained in this manual is organized
into the following major categories; Safety Information,
Product Information, Kit Installation and Testing Refer
to the table of contents for page numbers.
Read This Manual First
Quality Standards
The Quality System at the Cooper Power Systems, Kyle
Distribution Switchgear plant is certified to the following
standards.
ISO 9001, 1994
CAN/CSA ISO 9001, 1994
BS EN ISO 9001, 1994
Read and understand the contents of this manual and
follow all locally approved procedures and safety practices before installing or operating this equipment.
ANSI/ASQC Q9001, 1994
Additional Information
Description
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. When additional information is desired to satisfy
a problem not covered sufficiently for the user's purpose, please contact your Cooper Power Systems representative.
These instructions are intended for field installation of the vacuum interrupter replacement kits. Read and understand this
instruction sheet and follow all locally-approved procedures
and safety practices before installing and operating this equipment.
Acceptance and Initial
Inspection
Each kit is in good condition at the factory and when
accepted by the carrier for shipment.
The Types VW, VWE, VWV 27kV and VWVE 27kV KRW710V
Vacuum Interrupter Replacement Kit includes all the necessary
parts to replace the vacuum interrupter to assure the operating
rating.
Refer to Service Information S280-77-1 Installation and
Operation Instructions for procedures to remove recloser from
operation.
Upon receipt, inspect the carton for signs of damage.
Unpack the kit(s) and inspect it thoroughly for damage
incurred during shipment. If damage is discovered, file
a claim with the carrier immediately.
Handling and Storage
Be careful during handling and storage of the kit to minimize the possibility of damage. If the kit is to be stored for
any length of time prior to installation, provide a clean, dry
storage area.
3
Types VW, VWE, VWV 27kV and VWVE 27kV; KRW710V Vacuum Interrupter Replacement Kit
INSTALLATION
Replacement Instructions
Description
Before beginning these procedures, de-energize and disconnect the recloser from the system. Make sure the
low-voltage auxiliary power (if any) and the control cable
have been disconnected.
The existing vacuum interr upters, KA173VS and
KA215VS, rated at 15.5kV max., and KA150VWS and
KA227VS, rated at 27kV max., have been phased out of
production and are no longer available for repairs. A typical installation in an oil insulated recloser is shown in
Figure 1. Kit KRW710V has been established to replace
existing interrupters with the new VSAM-612-1 vacuum interrupter, as shown in Table 1. A new interrupter
installation is shown in Figure 2.
TABLE 1.
Available Kits
Recloser
Type
Existing
Interrupter
Existing
Interrupter
Existing
Replacement
Interrupter Interrupter
Kit
KRW710V1
VW-VWE
KA173VS
Phase A & B
KA215VS
KA327VS
VSAM-612-1
KA150VWS KA227VS
KA327VS
VSAM-612-1
VWV-VWVE
Phase C
KA150VWS KA227VS
KA327VS
VSAM-612-1
VW-VWE
Phase C
KA173VS
KA327VS
VSAM-612-1
VWV-VWVE
Phase A & B
Kit
KRV710V2
4
KA215VS
For installation and operation procedures, see: Service
Information S280-30-1, Types W, WV27, WV38X, VW,
VW27 and VWV38X Three-Phase, Hydraulically
Controlled Installation and Operation Instructions; S28040-2 Type VWE Installation and Operation Instructions.
For maintenance, see Service Information S280-30-7,
Ty p e s V W, VWV27 and VWV38 Maintenance
Instructions and S280-40-6 Types VWE and VWVE
Maintenance.
Removing Existing Interrupter
Refer to Figure 1 and proceed as follows:
1. Make sure the recloser is tripped open by pulling down
the yellow operating handle under the sleet hood to
the LOCKOUT position.
2. Untank the recloser and allow the oil to drain off the
mechanism.
3. Cut the four nylon tie straps that hold the vertical insulation barrier plate and the long bushing lead to the
stringers and to the upper current exchange assembly
plate.
4. Remove and discard the insulating barrier plate.
Disconnect and discard the long bushing lead.
5. Loosen and remove the upper interrupter clamp. As
the clamp is loosened, the contact rod will move
downward into the interrupter due to atmospheric
pressure acting on the bellows. Verify by observing
the scribe mark on the contact rod; it will move downward from just below the clamping fingers on the contact rod to just above, or below, the guide plate on the
interrupter.
Note: If the contact rod does not move, it may be
sticking in the clamping fingers of the current
exchange, or the interrupter may have lost its
vacuum. Use a screwdriver to gently spread
the clamping fingers to free the contact rod.
6. Loosen and remove the lower interrupter clamp.
7. Remove and discard the hardware attaching the lower
current exchange assembly to the three vertical
stringers.
8. Remove and discard the lower current exchange
assembly and the vacuum interrupter.
9. Remove and discard the three lower stringers.
S280-30-10
Installing Replacement
Interrupter
Refer to Figure 2 and proceed as follows:
1. Install the three new stringers supplied with the kit.
Note: When tightening, apply the plier jaws across
either roll pin near the top of the stringer to
prevent marring the surface.
2. Seat the stationary (bottom) contact rod of the
replacement interrupter in the clamping fingers of
the new lower current exchange plate and assemble
the plate to the stringers making sure the moving
(upper) contact rod of the interrupter is inserted into
the clamping fingers of the contact operating rod.
Note: There are two different lower current
exchange plates furnished with the replacement kit. One is used for either A- or Bphase; the other for C-phase. Positioning the
plates on the lower stringers will determine
which plate is appropriate.
3. Secure the plate of the lower current exchange
assembly to the stringers with the flat washer, split
lockwasher and hex nut supplied in the kit.
Note: Position the new spacer, included in the kit, on
the stud end of the single stringer before the
attaching hardware is installed.
4. Manually close the recloser using the T-handle closing tool (furnished as an accessory).
A. Remove the cover plate on the source side of the
recloser head.
B. Insert the closing tool into the port and engage
the pin to the main operating shaft.
C. To close the recloser, raise the yellow handle
(under the sleet hood) into the “up” or CLOSED
position and turn the closing tool clockwise 1/4turn.
5. Coat the threads of the interrupter clamps and
attaching screws with a light film of transformer oil
and install, but do not tighten, the upper and lower
interrupter clamps.
6. Position the upper and lower interrupter clamps up
to the shoulder of the clamp fingers, so the clamping
force will be applied to the center of each finger as
shown in Figure 3.
7. Carefully rotate the interrupter so that one of the hex
nuts (at the top of the interrupter) is centered directly
beneath the gap created between the two halves of
the clamp, as shown in Figure 3.
8. Evenly tighten the screws of both the upper and
lower clamps to a torque of 8.5Nm (75 in-lbs).
! CAUTION: Equipment damage. Do not twist or apply
radial pressure to the vacuum interrupter movable contact
rod. Excessive twisting or pressure on the contact rod will
damage the interrupter bellows, which can cause equipment
failure.
T211.0
Note: Clamps must be tight to prevent slippage of
the interrupter contact rods in their current
exchange connections.
9. Slip the insulating tubing over the long bushing
leads.
10. Install and connect the insulated lead from the bottom of the bushing to the bracket on the lower current exchange assembly using existing hardware.
11. Install the new vertical insulating barrier plate
between the long bushing lead and the stringer so
that the 101,6mm (4 inch) dimension is obtained
(see Figure 2). Secure the plate to the long bushing
lead, the stringer, and the upper current exchange
plate in “figure 8” configurations with three nylon
wire ties provided in the kit. (See Figures 2 and 4).
12. Secure the lower portion of the long bushing lead to
the stringer using a wire tie in a “figure 8” configuration.
13. Temporarily lower the recloser mechanism into the
tank. Manually open and close the recloser two or
three times. Then, with the unit in the open position,
raise the mechanism out of the tank and check the
contact gap. Make sure the upper and lower interrupter clamps are tightened securely. Verify contact
movement as shown in Figure 5.
Top of Interrupter Body
Moving Contact Rod
of Interrupter
Clamping Force “F”Four Places
F
Guide Plate
Lower Double
Stringers
F
Nut
Upper Current
Exchange Plate
Nylon Wire Ties
Clamping
Fingers (4) of
Operating Rod
Gap between
Clamp Halves
F
Figure 3.
Interrupter and Clamp Orientation.
F
Insulating
Barrier Plate
Long Bushing
Lead
Figure 4.
Typical representation of nylon wire tie “figure 8” configuration.
5
Types VW, VWE, VWV 27kV and VWVE 27kV; KRW710V Vacuum Interrupter Replacement Kit
Note: Verify contact movement by observing the movement of the scribe mark on the upper contact rod of
the interrupter. When the recloser is open, the
scribe mark will be approximately 15,8mm (5/8
inch) above the guide plate; when closed, the mark
will travel 12,7mm (1/2 inch) downward.
14. Clean and examine the head gasket. Replace if cracked,
cut or otherwise damaged, or if it is per manently
deformed.
TESTING
Dielectric Withstand Test
The High Potential Withstand Test provides information
on the dielectric condition of the recloser and the vacuum integrity of the interrupters. Testing is performed at
75% of the rated low-frequency-withstand voltage (37.5
kV for VW and VWE reclosers, 45kV for VWV and
VWVE reclosers).
15. Clean the gasket seat and retank the recloser.
16. Replace the head bolts and torque 47.5-74.6Nm (35-55 ftlbs). Apply the clamping force gradually and equally to
each bolt in rotation to achieve an evenly distributed
gasket-sealing pressure.
17. Check the oil level with the dipstick in the head. When
necessary, fill the tank to the upper line on the dipstick
using new, clean, dry transformer oil.
18. Before returning the recloser to service, perform a HighPotential Dielectric Withstand Test to ensure that the
dielectric clearances within the tank have not been compromised.
Upper Current Exchange Plate
Upper Interrupter Clamp
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 Te s t Vo l t a g e R a t i n g s
Information for further information.
G109.2
!
TEST 1: Proceed as follows:
1. Manually close the main contacts of the recloser.
2. Electrically ground the recloser tank and head.
3. Connect the source-side bushings (1, 3, 5) together.
4. Apply proper test voltage to source side bushings.
5. The recloser should withstand test voltage for 60
seconds.
Upper Contact Rod
15,8mm (5/8”)
3,18mm (1/8”)
12,7mm
(1/2”) Travel
Scribe Mark
Scribe Mark
Guide Plate
Recloser (Closed)
Recloser (Open)
Figure 5.
Verify contact movement by observing scribe mark travel.
6
TEST 2: Proceed as follows:
1. Manually close the main contacts of the recloser.
2. Electrically ground the recloser tank and head.
3. Ground Phase A (bushing 2) and Phase C (bushing
6).
4. Apply proper test voltage to Phase B (bushing 3).
5. The recloser should withstand test voltage for 60
seconds.
TEST 3: Proceed as follows:
1. Open the main contacts of the recloser.
2. Electrically ground the recloser tank and head.
3. Connect and ground the three load-side bushings (2,
4, 6).
4. Connect the source-side bushings (1, 3, 5) together.
5. Apply proper test voltage to the source-side bushings.
6. The recloser should withstand the test voltage for 60
seconds.
7. Reverse the connections: ground the source-side
bushings (1, 3, 5) and apply test voltage to the loadside bushings (2, 4, 6) for 60 seconds.
8. The recloser should withstand the test voltage for 60
seconds.
S280-30-10
TEST RESULTS: The High Potential Withstand Tests provide
information on the dielectric condition of the recloser and
the vacuum integrity of the interrupters.
A. If the recloser passes the closed-contacts tests (Tests 1
and 2), but fails the open-contacts test (Test 3), a deteriorated vacuum in one or more of the interrupters is most
likely the cause. Retest each vacuum interrupter individually to determine the failed phase or phases, and replace
the interrupter. Retest to confirm the success of the repair.
B. If the recloser fails the closed-contacts tests (Tests 1 and
2), the cause is likely to be diminished electrical clearance
or failed insulation. After analyzing, then correcting, the
problem, retest to confirm the success of the repair.
7
Types VW, VWE, VWV 27kV and VWVE 27kV; KRW710V Vacuum Interrupter Replacement Kit
!
SAFETY
FOR LIFE
P.O. Box 1640, Waukesha, WI 53187
www.cooperpower.com
©1997 Cooper Power Systems, Inc.
Kyle® is a registered trademark of Cooper Industries, Inc.
KA2048-267-01
Printed on Recycled Paper
KRP
5/97