OEM Equipment
Service Information
Sectionalizing Switch
Installation Instructions
S800-64-1
CONTENTS
GENERAL......................................................................1
ELECTRICAL RATINGS ...............................................1
INSTALLATION.............................................................2
Step 1 Mount Switch ...............................................2
Step 2 Lead Training ...............................................3
Step 3 Index Plate....................................................3
Step 4 Markings .......................................................4
OPERATING INSTRUCTIONS......................................4
TANK WALL
SWITCH
CAUTION: Sectionalizing Switch should
be installed only by personnel familiar
with good safety practice and the handling of
high-voltage electrical equipment.
!
GENERAL
Cooper Power Systems’ RTE® sectionalizing switches
are used in underground residential applications with
loop feed, and in three-phase commercial industrial
installations where the ability to use an alternative source
of power is necessary. They can also be used to switch
on and off a primary cable tap on a transformer.
RTE sectionalizing switches rotate 360° in either
direction for alternate source selection. A spring-loaded
activating mechanism ensures quick loadbreak action
and positive contact engagement through all positions.
The under-oil switch can be installed near the
transformer core/coil assembly, thus minimizing cable
capacitance. With cable capacitance minimized and all
three phases switched simultaneously, the likelihood of
ferroresonance is greatly reduced. Sidewall or cover
mounted switches are hotstick operable and available in
six different blade configurations for one, two or three
pole connections.
ELECTRICAL RATINGS
TABLE 1
Voltage Ratings and Characteristics
Description
Standard Voltage Class
Maximum Rating Phase-to-Phase
Maximum Rating Phase-to-Ground
ac 60 Hz 1 Minute Withstand
BIL and Full Wave Crest
15 kV
25 kV
35 kV
15
15
8.3
34
95
25
25
15.2
40
125
35
35
21.1
50
150
Figure 1.
Line illustration of Sectionalizing Switch.
TABLE 2
Current Ratings and Characteristics
Description
15 kV
25 kV
35 kV
Continuous
Momentary, 10 Cyc. Symmetrical
600
10,000
300
10,000
200
10,000
Two Second, Symmetrical
3-Shot Make and Latch, Symmetrical
Loadbreak/Loadmake
20 operations
30 operations
10 operations
No. Mechanical Switching Operations
10,000
10,000
10,000
10,000
10,000
6,000
600
300
100
Over
1000
300
150
50
Over
1000
200
100
25
Over
1000
Loadbreak/Loadmake tested per ANSI/IEEE C37.71.
These instructions do not claim to cover all details or variations in the equipment, procedure, or process described, nor to provide
directions for meeting every 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 sales engineer.
January 1994 • New Issue • © 1993 Cooper Power Systems, Inc.
Printed in U.S.A.
1
Sectionalizing Switch Installation Instructions
A
.78
(20 mm)
C
B
D
E
.470"
(11.9 mm)
DIA. HOLE
ALL LINE
CONNECTIONS
8.35"
(212 mm)
4.376"
(111.2 mm)
5.153"
(130.9 mm)
.438"
(11.1 mm)
DIA. MTG. HOLES
TANK SEALING
GLAND FURNISHED
WITH SWITCH
5.400"
(137.2 mm)
TYP.
SEE NOTE 2 AND 3
2.75"
(69.9 mm)
8.346"
(212 mm)
Figure 2.
Line illustration with dimensions of sectionalizing switch.
Note: 1. Dimensions given in Figure 2 and Table 3 are for reference only.
2. Handle can be used on 14 GA. (.075/1.9 mm) to .25 (6.4 mm) thick frontplate. 14 gage shown.
3. Optional padlock handle is available, but not shown.
4. See catalog section 800-64 for switch types, number of phases, and catalog numbers.
TABLE 3
Dimensional Information for Figure 2
NO. OF
DECKS/
PHASES
A
SIDEWALL MOUNT
15 & 25 kV
35 kV
D
COVER MOUNT
15 & 25 kV
35 kV
E
B
C
SIDEWALL MOUNT
15 & 25 kV
35 kV
COVER MOUNT
15 & 25 kV
35 kV
SIDEWALL
MOUNT
COVER
MOUNT
—
—
7.0
8.0
12.25
13.25
.745
6.0
(177.8 mm) (203.2 mm) (311.2 mm) (336.6 mm) (19.05 mm) (152.4 mm)
—
7.0
8.0
12.25
13.25
.75
6.0
(177.8 mm) (203.2 mm) (311.2 mm) (336.6 mm) (19.05 mm) (152.4 mm)
1
7.75
8.75
13.0
14.00
(196.9 mm) (222.3 mm) (330.2 mm) (355.6 mm)
2
11.813
12.813
17.063
18.063
4.063
(300.0 mm) (325.5 mm) (433.4 mm) (458.8 mm) (103.2 mm)
3
15.875
16.875
21.125
22.125
4.063
4.063
7.0
8.0
12.25
13.25
.75
6.0
(403.2 mm) (428.6 mm) (536.6 mm) (561.9 mm) (103.2 mm) (103.2 mm) (177.8 mm) (203.2 mm) (311.2 mm) (336.6 mm) (19.05 mm) (152.4 mm)
INSTALLATION
■
■
Sectionalizing switches are sidewall or cover-mounted
in a 1.325" diameter hole with the internal electrical
switch components completely immersed under
transformer oil or equivalent. Refer to Figure 2 for
dimensional information.
All parts should be inspected for damage before
using. If there is evidence of physical damage, the
unit should not be installed unless approved by your
Cooper Power Systems representative.
Step 1.
MOUNT SWITCH
■ Switch should be mounted to four (4) couplings on
inside of tank (refer to Figure 3 for coupling pattern)
before tightening locking nut to sealing gland. Failure
to do this may increase operating torque of switch or
cause damage.
2
■
■
Sealing is accomplished with O-rings on operating
shaft and gasketed sealing gland secured on outside
of tank with locking nut.
Switch should be located to ensure recommended
clearances in Table 4 are maintained.
TABLE 4
Recommended Clearances
Mechanical
External handle clear of obstruction. Clearances also required
for hook-stick operation.
Dielectric (Under Oil)
Minimum of 4 inches on all sides of the switch.
1.325"
(34 mm)
DIA. HOLE
1.5"
(38.1 mm)
TYP.
2.187"
(56 mm)
TYP.
1.375"
(35 mm)
TYP.
.662"
(17 mm)
2.750"
(70 mm)
1.5"
(38.1 mm)
TYP.
.140"
(4 mm)
RAD.
ON INSIDE WALL:
COUPLING WITH 3/8-16
TAPPED THREAD
X .75 LG
(19.1 mm)
4.375"
(111 mm)
ON OUTSIDE WALL:
.312" Dia. x
625" Long
(7.9 mm) (15.9 mm)
WELD PIN
Figure 3.
Mounting hole and coupling placement.
NOTES:
1. Weld pins, couplings and position designations not included with switch. Pre-welded coupling pin plates available-cat. no. 2037424C02M.
2. All couplings and pins to be welded flat within an angularity tolerance of ± 30’.
3. Alternate method: weld 3/8 – 16 x 1.25 L studs in place of couplings and use .75 long spacers over studs.
■
Torque requirements as defined in Table 5 shall be
maintained.
TABLE 5
Recommended Torque
Mounting Bolts:
3/ " diameter mounting bolts to be
8
torqued 60-100 in-lbs
To Seal (Gland):
60-120 in-lbs
Step 2
LEAD TRAINING
■ Cantilever Strength of Assembly:
Sufficient to support one 500MCM Cu lead per
contact.
■ Switch contacts are pre-gauged at factory and will
have some rotation in same plane as switch blade.
Leads attached to switch contacts must not restrict
this rotation. The nuts holding the contacts should not
be tightened. Leads can be bolted to rear of contact
and care should be taken to minimize mechanical
stress on the contacts. Standard dielectric dimensions
for lead separation should be followed. Tight lead
training may cause excess cantilever force and
difficulty in switch operation.
Step 3.
INDEX PLATE
■ An externally installed optional limit plate prevents
rotation to positions other than the one desired. Refer
to Figure 4.
WELD PINS (4)
(FOR
LOCATING
LIMIT PLATE)
LINES
A&B
LINE A
ONLY
LINE B
ONLY
OPEN
NOTE: Typical position configuration shown for some “V” blade switches.
See catalog section 800-64 for other switch layouts and schematics.
Position labeling provided by equipment manufacturer.
Figure 4.
View of tank front with optional limit plate positioned over pin.
NOTE: With limit plate positioned securely as shown, switch can be operated
only counterclockwise to “line A only” position and no further.
3
Sectionalizing Switch Installation Instructions
Step 4.
MARKINGS
■ Appropriate markings and/or stops should be
included on tank wall to meet customer specifications.
CAUTION: Enclosed decal (Cooper P/N
1109699A) should be displayed at or near
operating handle of switch as a warning to
service personnel. Failure to do so will
constitute a waiver of all warranty and indemnity
obligations which may be attributable to Cooper
Power Systems.
!
OPERATING INSTRUCTIONS
■
■
■
■
The switch can be operated 360° in either clockwise
or counter-clockwise direction.
When switching (with hotstick) from one position to the
next, (for example: position “A” to position “B”), the
limit plate should be located on the pin location just
beyond the position being turned to.
Turn hotstick until switch has fully indexed into the
next position. If for any reason, the switching
operation cannot be completed with a single motion, it
is acceptable to relax, regrip the hotstick and
complete the operation by moving the switch handle
in the same direction as the original effort. NOTE: Do
not reverse the direction of the switching operation
before completing the rotation.
If the handle stops (jams) in a position between the
designated (marked) positions, stop switching
operation and consult the factory prior to reattempting
operation of the switch.
RTE® is a registered trademark of Cooper Power Systems, Inc.
#5000050062 Rev. 02
4
P.O. Box 1640
Waukesha, WI 53187