S&C Trans-Rupter II SE User manual

Installation
Table of Contents
Section Page Section Page
Introduction
Qualified Persons .............................2
Read this Instruction Sheet......................2
Retain this Instruction Sheet .....................2
Proper Application.............................2
Warranty ....................................2
Safety Information
Understanding Safety-Alert Messages .............3
Following Safety Instructions.....................3
Replacement Instructions and Labels..............3
Location of Safety Labels .......................4
Inspection and Packaging
Inspection ...................................5
Packaging ...................................5
Installation on a User-Furnished Structure
Installing the Pole-Unit .........................6
Mounting the Control Cabinet ...................12
Connecting Pole-Units to the Control Cabinet.......13
Installation on S&C Mounting Pedestals
Installing S&C Mounting Pedestals ...............15
Installing the Pole-Unit ........................17
Mounting the Control Cabinet ...................21
Installing the Conduit Assembly .................23
Wiring the Pole-Unit Connections ................24
Control Cabinet Set-Up
Connecting Current Transformers to the
Control Cabinet ...........................27
Testing Control Devices. . . . . . . . . . . . . . . . . . . . . . . . 28
Installing Optional Bypass Accessory
Before Starting ..............................32
Operation ..................................33
Terminal Pad and Conductor Connections
Installing the Terminal Pads ....................34
Attaching High-Voltage Conductors ..............35
Checklist Before Commissioning Trans-Rupter II ....36
Manual Charging Tool Assembly
Disassembling the Charging Tool ................37
Assembling the Charging Tool...................38
Extra Sections for the Charging Tool..............39
Indicators
Understanding the Pole-Unit Position
Indicators ...............................40
Understanding the Gas-Pressure Gauge ..........40
Understanding the Optional Remote Gas-Density
Indicator .................................42
Inspection Recommendations
Pole-Units and Control Cabinet..................43
Manual-Trip Device and Trip-Energy Supply .......43
Guidelines for Interrupter Resistance Values .......44
Inspection Recommendations...................44
S&C Trans-Rupter II®Transformer Protector
Outdoor Transmission (69 kV through 138 kV)
Model SE
May 20, 2013© S&C Electric Company Instruction Sheet 731-502

Introduction
Qualified Persons ÇWARNING
The equipment covered by this publication must be installed, operated, and maintained
by qualified persons who are knowledgeable in the installation, operation, and main-
tenance of overhead electric power distribution equipment along with the associated
hazards. A qualified person is one who is trained and competent in:
• The skills and techniques necessary to distinguish exposed live parts from non-live
parts of electrical equipment.
• The skills and techniques necessary to determine the proper approach distances
corresponding to the voltages to which the qualified person will be exposed.
• The proper use of the special precautionary techniques, personal protective equip-
ment, insulating and shielding materials, and insulated tools for working on or near
exposed energized parts of electrical equipment.
These instructions are intended only for such qualified persons. They are not
intended to be a substitute for adequate training and experience in safety procedures
for this type of equipment.
Read this
Instruction Sheet
Read this instruction sheet thoroughly and carefully before installing or operating
your S&C Trans-Rupter II Transformer Protector. Familiarize yourself with “Safety
Information” on pages 3 and 4. The latest version of this publication is available online
in PDF format at sandc.com/Support/Product-Literature.asp
Retain this
Instruction Sheet
This instruction sheet is a permanent part of your S&C Trans-Rupter II. These instructions
should be stored in the instruction manual holder of the control cabinet.
Proper Application ÇCAUTION
The equipment in this publication is only intended for primary-side application on
distribution substation transformers. The application must be within the ratings fur-
nished for the equipment. Ratings for Trans-Rupter II are listed on the ratings label
on the side of the control cabinet.
Warranty The warranty and/or obligations described in S&C’s standard conditions of sale, as set
forth in Price Sheet 150, plus any special warranty provisions, as set forth in the appli-
cable product-line specification bulletin, are exclusive. The remedies provided in the
former for breach of these warranties shall constitute immediate purchaser’s or end
user’s exclusive remedy and a fulfillment of all seller’s liability. In no event shall seller’s
liability to immediate purchaser or end user exceed the price of the specific product which
gives rise to immediate purchaser’s or end user’s claim. All other warranties whether
express or implied or arising by operation of law, course of dealing, usage of trade or
otherwise, are excluded. The only warranties are those stated in Price Sheet 150, and
THERE ARE NO EXPRESS OR IMPLIED WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. ANY EXPRESS WARRANTY OR OTHER
OBLIGATION PROVIDED IN PRICE SHEET 150 IS GRANTED ONLY TO THE IMMEDI-
ATE PURCHASER AND END USER, AS DEFINED THEREIN. OTHER THAN AN END
USER, NO REMOTE PURCHASER MAY RELY ON ANY AFFIRMATION OF FACT OR
PROMISE THAT RELATES TO THE GOODS DESCRIBED HEREIN, ANY DESCRIPTION
THAT RELATES TO THE GOODS, OR ANY REMEDIAL PROMISE INCLUDED IN PRICE
SHEET 150.
The seller’s warranties are contingent upon the installation and adjustment of
Trans-Rupter II in accordance with S&C’s applicable instruction sheets, data sheets, and/
or data bulletins.
2 S&C Instruction Sheet 731-502

Safety Information
Understanding
Safety-Alert
Messages
There are several types of safety-alert messages which may appear throughout this
instruction sheet as well as on labels attached to the Trans-Rupter II. Familiarize
yourself with these types of messages and the importance of the various signal
words, as explained below.
ÇDANGER
“DANGER” identifies the most serious and immediate hazards which will likely result
in serious personal injury or death if instructions, including recommended precautions,
are not followed.
ÇWARNING
“WARNING” identifies hazards or unsafe practices which can result in serious personal
injury or death if instructions, including recommended precautions, are not followed.
ÇCAUTION
“CAUTION” identifies hazards or unsafe practices which can result in minor personal
injury or product or property damage if instructions, including recommended precau-
tions, are not followed.
NOTICE
“NOTICE” identifies important procedures or requirements that can result in product or
property damage if instructions are not followed.
Following Safety
Instructions
If you do not understand any portion of this instruction sheet and need assistance,
contact your nearest S&C Sales Office or S&C Authorized Distributor. Their tele-
phone numbers are listed on S&C’s website sandc.com Or call S&C Headquarters
at [phone]; in Canada, call S&C Electric Canada Ltd. at [phone].
ÇDANGER
Read this instruction sheet thoroughly and carefully
before installing or operating your S&C Trans-Rupter II
Transformer Protector.
Replacement
Instructions
and Labels
If you need additional copies of this instruction sheet, contact your nearest S&C Sales
Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
It is important that any missing, damaged, or faded labels on the equipment be replaced
immediately. Replacement labels are available by contacting your nearest S&C Sales
Office, S&C Authorized Distributor, S&C Headquarters, or S&C Electric Canada Ltd.
S&C Instruction Sheet 731-502 3

Safety Information
Location of Safety Labels
Reorder Information for Safety Labels
Location Safety-Alert Message Description Part Number
AÇWARNING Do not close Trans-Rupter II if the source-side series disconnect
is closed. G-7016R1
BÇWARNING Do not charge if disconnect is closed. G-7009-1
CÇWARNING Do not disassemble or modify pole-units. G-7015-5
C
B
A
4 S&C Instruction Sheet 731-502

Inspection and Packaging
Inspection Examine the shipment for external evidence of damage as soon after receipt as possible,
preferably before removal from the carrier’s conveyance. Check the bill of lading to make
sure that all shipping skids, crates, and containers listed thereon are present.
If there is visible loss and/or damage:
1. Notify the delivering carrier immediately.
2. Ask for a carrier inspection.
3. Note condition of shipment on all copies of the delivery receipt.
4. File a claim with the carrier.
If concealed damaged is discovered:
1. Notify the delivering carrier within 15 days of receipt of shipment.
2. Ask for a carrier inspection.
3. File a claim with the carrier.
Also notify S&C Electric Company in all instances of loss and/or damage.
Packaging Each Trans-Rupter II consists of three pole-units, a control cabinet, a manual charging
tool, and six terminal pads and their associated hardware. Pole-units are shipped fully
pressurized, at 75 psig. The pole-units and charging tool are packed together in a wood
crate. The terminal pads and hardware are shipped in the foam packing at the base of
the middle pole-unit. The control cabinet is packed separately. If furnished, mounting
pedestals are shipped separately, bolted to skids. Associated mounting-pedestal hardware
is packaged separately and attached to the mounting-pedestal base.
Remove the shipping crate cover. Remove the charging tool and the terminal pads and
their hardware from the crate. Remove the control cabinet from its packaging. Set these
items aside in a protected area. If mounting pedestals are furnished, remove the conduit
assembly from the cross base.
ÇWARNING
DO NOT disassemble or modify the pole-units.
The pole-units are pressurized at 75 psig.
Serious injury can result.
S&C Instruction Sheet 731-502 5

Installation on a User-Furnished Structure
ÇCAUTION
The user-furnished mounting structure must
meet the guidelines for static and dynamic
loading limits listed in S&C Data Bulletin
731-60.
Failure to observe these guidelines can
result in equipment damage.
Installing the Pole-Unit
Repeat Steps 1 through 10 for each pole-unit.
Step 1
Bolt a mounting bracket to the structure at the
location where the pole-unit will be attached.
The mounting bracket must be fabricated of at
least Z\v-inch-thick steel.
Step 2
Remove the pole-unit from the shipping crate
and lift it, using the following procedure:
ÇCAUTION
Lift the pole-unit only by the lifting bracket.
Lifting it by any other means can dam-
age the pole-unit.
Wrap a hoist sling or other lifting device
around the lifting bracket at the top of the pole-
unit. Carefully pull the pole-unit upward. The
foam wrappings around the top, mid-section,
and base should come off as the pole-unit is
lifted. Remove these wrappings if they do not
come off. Do not remove the shipping brace at
this time. See Figures 1, 2, and 3.
ÇCAUTION
DO NOT remove the shipping brace around
the base of the pole-unit at this time.
Damage to the operating shaft can
occur.
Figure 1. Lift the pole-unit only by the lifting bracket.
Pole-unit
Lifting bracket
6 S&C Instruction Sheet 731-502

Installation on a User-Furnished Structure
Figure 2. Pull the pole-unit carefully upward. Figure 3. Do not remove the shipping brace at this time.
Pole-unit
Shipping brace
S&C Instruction Sheet 731-502 7

Installation on a User-Furnished Structure
Figure 4. With the pole-unit lifted off the ground, check the gas-pressure
gauge on the underside of each pole-unit base.
Shipping brace
Pole-unit indicators
Step 3
With the foam wrapping around the pole-unit
base removed and the pole-unit lifted off the
ground, check that the gas-pressure gauge on
the underside of the pole-unit base is in the “OK”
to operate zone. See Figures 4 and 5.
NOTICE
The gas-pressure gauge needle should be in
the “OK” to operate zone. If the gauge is not
in this position, stop the installation and notify
S&C Electric Company.
Figure 5. Check that the gas-pressure gauge on each pole-unit is in the
“OK” to operate zone.
“OK” to operate zone
8 S&C Instruction Sheet 731-502

Installation on a User-Furnished Structure
Step 4
Position the pole-unit so that its base is near
the pole-unit mounting bracket. If necessary,
rotate the pole-unit so that its electrical junction
box and terminal-pad attachment locations are
appropriate for the installation. See Figure 6.
NOTICE
The terminal pad of each pole-unit can be
mounted in one of four positions located 90°
apart. Determine where terminal pads will be
attached before mounting the pole-unit.
Step 5
Remove the shipping brace from the pole-unit
base. See Figure 7.
ÇCAUTION
DO NOT rest the pole-unit on its base
after the shipping brace has been removed.
Damage to the operating shaft can
occur.
Figure 6. Position the pole-unit base near the pole-unit mounting
bracket.
Pole-unit
Pole-unit mounting bracket
Figure 7. Unbolt the shipping brace.
Shipping brace
Bolt
S&C Instruction Sheet 731-502 9

Installation on a User-Furnished Structure
Step 6
Attach the pole-unit base to the mounting
bracket installed in Step 1, using the set of
mounting bosses nearest to the bracket. Both
the top and bottom mounting bosses must be
used. Use the B\,–11 32 stainless-steel studs
furnished. Screw each stud until it bottoms,
approximately 8 to 9 turns. DO NOT remove the
hoist sling or lifting device from the pole-unit at
this time. See Figure 8.
Figure 8. Attach the pole-unit base to the bracket.
Top and bottom
mounting boss
locations
Mounting
bracket
Pole-unit base
Step 7
Attach B\,–11 hex nuts to the studs and tighten
both the pole-unit and motor bracket nuts to a
torque of 70 to 80 ft.-lbs. Use a flat washer and
a lockwasher on each stud. See Figure 9.
ÇCAUTION
Never exceed the recommended torque limit.
The pole-unit base is pressurized and
damage to the pole-unit may occur.
Figure 9. Tighten the nuts.
Nuts
10 S&C Instruction Sheet 731-502

Installation on a User-Furnished Structure
Step 8
Place a second mounting bracket flush against
the bosses on the opposite side of the pole-unit
base. Attach the mounting bracket to both the
top and bottom mounting bosses. Use shims as
required. Then attach the bracket to the struc-
ture. Make sure the mounting bracket is aligned
with the structure before tightening the studs.
See Figure 10.
ÇCAUTION
Two sets of mounting bosses, positioned 180°
apart, must be used to mount the pole-unit.
If the correct mounting bosses are not
used, the pole-unit will not be adequately
supported and the pole-unit base could be
damaged.
Step 9
Tighten the second set of nuts to a torque of
70 to 80 ft.-lbs. See Figure 11.
Step 10
Remove the hoist sling or lifting device from
the pole-unit.
Figure 10. Attach a second mounting bracket to pole-unit base.
Pole-unit base
Studs
Second mounting
bracket
Two sets of
mounting
bosses located
180° apart
Figure 11. Tighten the nuts.
Nuts
S&C Instruction Sheet 731-502 11

Installation on a User-Furnished Structure
Mounting the Control Cabinet
Step 11
Drill four M\zn-inch diameter holes in the struc-
ture where the control cabinet will be mounted.
Refer to the catalog drawing for appropriate
locations for the holes. Make sure the mount-
ing height allows for convenient access to the
enclosure. See Figure 12.
Mounting structure
Figure 12. Drill four holes in the structure where the control cabinet will
be mounted.
Step 12
Align the control cabinet tabs with the
mounting holes in the structure. Then bolt
all four tabs to the mounting structure, using
user-furnished C\,-inch hardware. See Figure 13.
Figure 13. Bolt the tabs of the control cabinet to the mounting structure.
Mounting structure
Top mounting tabs
Tabs
Step 13
Ground the control cabinet by solidly con-
necting one Number 6 AWG wire (or wires of
equivalent cross-sectional area) to the flange at
the bottom rear of the enclosure. See Figure 14.
Solidly connect the enclosure ground wire to
the switch ground wire(s).
Figure 14. Ground the control cabinet by solidly connecting one Number
6 AWG wire (or wires of equivalent cross-sectional area) to the flange at
the bottom rear of the enclosure.
Flange
Base of control
cabinet
Holes
12 S&C Instruction Sheet 731-502

Installation on a User-Furnished Structure
Figure 15. If additional holes for control wiring are required, remove the
conduit-entrance plate and punch the necessary opening(s).
Conduit-entrance plate
Step 14
To add holes for control-circuit conduit(s) for
control power and relays, mark the location(s)
on the conduit-entrance plate at the bottom of
the cabinet. Then remove the plate and punch
the necessary opening(s). Replace the conduit-
entrance plate. See Figure 15.
NOTICE
Punch holes for conduit(s) only on the bottom
of the cabinet. The cabinet is not designed
to accommodate holes in any other
location.
Figure 16. Remove the three removable screws at each pole-unit electrical
junction box cover. Loosen the fourth retaining screw.
Window
bolts—DO NOT
REMOVE
Retaining screw
Cover
Removable
screws
Figure 17. Swing out the cover to access the wiring inside the electrical
junction box.
Underside of pole-unit
junction box
Cover
Electrical
junction box
Connecting Pole-Units to the
Control Cabinet
Step 15
Remove the three removable screws at each
pole-unit electrical junction box cover. Retain
the screws. Loosen the fourth retaining screw.
Then swing out the cover to access the wiring
inside the electrical junction box. See Figures
16 and 17.
ÇWARNING
DO NOT REMOVE the window bolts.
The pole-unit is pressurized to 75 psig.
Serious injury could occur.
S&C Instruction Sheet 731-502 13

Installation on a User-Furnished Structure
Step 18
Rotate the cover of each electrical junction
box and replace the retained screws. Securely
tighten all screws. See Figure 20.
Go to Step 54 on page 32 for installing
optional motor operators.
Go to Step 60 on page 34 for connecting user-
furnished protective relays and control power.
Figure 20. Securely tighten the screws of the electrical junction box cover.
Underside of
pole-unit base
Cover
Removable
screws
Step 16
Prepare appropriate lengths of conduit to con-
nect the pole-unit electrical junction boxes to
the control-circuit conduit. Using watertight
fittings, attach the conduit to the junction boxes
and to the hole(s) along the bottom of the con-
trol cabinet. See Figure 18.
Figure 18. Attach the conduit to the hole(s) along the bottom of the
connection enclosure.
Conduit
Step 17
Following the wiring diagram furnished, con-
nect user-furnished wiring to the appropriate
terminal blocks in the control cabinet and to
the wiring inside the electrical junction boxes.
Use the butt splices attached to the junction-
box wiring. The butt splices accommodate 18
to 22 AWG wire. Use of 18-gauge wire is recom-
mended. See Figure 19.
NOTICE
To ensure proper crimping of the butt splices,
use the Panduit controlled-cycle hand tool
(CT-1550) or equivalent for attaching 18- to
20-gauge insulated ring lugs.
Figure 19. Connect pole-unit wiring to terminal blocks in control cabinet,
in accordance with the wiring diagram furnished.
Terminal blocks for
pole-unit wiring
14 S&C Instruction Sheet 731-502

Installation on S&C Mounting Pedestals
ÇCAUTION
The foundations for S&C Mounting Pedestals
must be designed to meet the loading limits
specified in the appropriate S&C Data Bulle-
tin 731-60.
Failure to meet these loading limits can
result in equipment damage.
Installing S&C Mounting Pedestals
Step 19
Cut the steel straps that bind the mounting
pedestals and cross base. Unbolt the mounting
pedestals from the skids.
Step 20
Install the pedestals.
a. To lift a pedestal into position, attach eye-
bolts to the holes along the top gusset of
each pedestal. Make sure that the grounding
pads are positioned properly for the installa-
tion. Also make sure that the pedestals
are positioned such that holes for the
connection enclosure face the desired
direction, per the catalog drawing.
b. Adjust the lower set of anchor-bolt nuts to
generally plumb and level the pedestals. The
upper set of anchor-bolt nuts should be only
loosely attached at this time. See Figure 21.
Step 21
Install the cross base.
a. Attach four suitable lifting slings to the cross
base.
b. Lift the cross base atop the pedestals. Avoid
sudden starts and stops.
c. Position the cross base on the pedestals.
Make sure the cross base is positioned
such that the side to which the conduit
assembly will be attached, is facing the
desired direction for the installation.
Refer to the catalog drawing. See Figure 22.
Figure 22. Lift the cross base atop the mounting pedestals.
Pedestals
Cross base
Figure 21. Adjust the lower set of anchor-bolt nuts to generally plumb
and level the pedestals.
Pedestal
Anchor bolts
S&C Instruction Sheet 731-502 15

Installation on S&C Mounting Pedestals
Step 22
For 69-kV Trans-Rupter II with 84-inch
phase spacing; 115-kV Trans-Rupter II; and
138-kV Trans-Rupter II:
Loosely bolt the cross base to the pedestals
using the Z\x–13 31C\v bolts furnished. Using a
level, verify that the cross base is horizontal,
both lengthwise and side-to-side. Adjust the
anchor bolts as necessary to achieve this condi-
tion. Then securely tighten the Z\x–13 31C\v bolts.
See Figure 23.
Step 23
For 69-kV Trans-Rupter II with 48-inch
phase spacing:
a. Loosely bolt the cross base to the pedestal,
using the Z\x–13 31C\v bolts furnished.
b. Attach two crossarm attachment brackets
to the cross base as shown on the catalog
drawing.
c. Attach the two support arms to the mounting
pedestal using the B\,–11310 bolts furnished.
Fully tighten the bolts. Refer to the catalog
drawing for the placement of the support
arms.
d. Attach the support arms to the crossarm
attachment brackets using the B\,–11 31Z\x
bolts furnished. Fully tighten the bolts.
e. Using a level, verify that the cross base is
horizontal, both lengthwise and side-to-side.
Adjust the anchor bolts as necessary to
achieve this condition, then tighten all bolts
for the mounting pedestal, cross base, and
support arms to a torque of 50-60 ft.-lbs.
Step 24
Slip the furnished steel plate(s) over the top of
each pedestal. Make sure the plates extend to
both sides of the pedestal. See Figure 24.
Step 25
Check the lower set of anchor-bolt nuts at each
mounting pedestal to verify that each is in con-
tact with the bottom of the plate. Hand-tighten
these anchor-bolt nuts as needed. See Figure 25.
Step 26
Securely tighten the upper set of anchor-bolt
nuts at each mounting pedestal. See Figure 25.
Figure 23. Bolt the cross base to the pedestals.
Cross base
Bolts
Pedestal
Figure 24. Slip the furnished steel plates over the top of each pedestal.
Pedestal
Steel plate
Figure 25. Securely tighten the upper set of anchor-bolt nuts at each
mounting pedestal.
Pedestal
Upper anchor-bolt nuts
16 S&C Instruction Sheet 731-502

Installation on S&C Mounting Pedestals
Installing the Pole-Unit
Repeat Steps 27 through 34 for each pole-unit.
Step 27
Remove the pole-unit from the shipping crate
and lift it, using the following procedure:
ÇCAUTION
Lift the pole-unit only by the lifting bracket.
Lifting it by any other means can dam-
age the pole-unit.
Wrap a hoist sling or other lifting device
around the lifting bracket at the top of the pole-
unit. Carefully pull the pole-unit upward. The
foam wrappings around the top, mid-section,
and base should come off as the pole-unit is
lifted. Remove these wrappings if they do not
come off. Do not remove the shipping brace at
this time. See Figures 26, 27, and 28.
ÇCAUTION
DO NOT remove the shipping brace around
the base of the pole-unit at this time.
Damage to the operating shaft can
occur.
Figure 26. Lift the pole-unit only by the lifting bracket.
Pole-unit
Lifting bracket
Figure 27. Pull the pole-unit carefully upward.
Figure 28. Do not remove the shipping brace at this time.
Pole-unit
Shipping brace
S&C Instruction Sheet 731-502 17

Installation on S&C Mounting Pedestals
Figure 29.With the pole-unit lifted off the ground, check the gas-pressure
gauge on the underside of each pole-unit base.
Shipping brace
Pole-unit indicators
Step 28
With the foam wrapping around the pole-unit
base removed and the pole-unit lifted off the
ground, check that the gas-pressure gauge on
the underside of the pole-unit base is in the “OK”
to operate zone. See Figures 29 and 30.
NOTICE
The gas-pressure gauge needle should be in
the “OK” to operate zone. If the gauge is not
in this position, stop the installation and
notify S&C Electric Company.
Figure 30. Check that the gas-pressure gauge on each pole-unit is in the
“OK” to operate zone.
“OK” to operate zone
18 S&C Instruction Sheet 731-502

Installation on S&C Mounting Pedestals
Step 29
Position the pole-unit so that its base is just
above the cross base. If necessary, rotate the
pole-unit so that its electrical-junction box is
positioned to the side of the cross base, where
the conduit will be attached. See Figure 31.
Step 30
Remove the shipping brace from the pole-unit
base. See Figure 32.
ÇCAUTION
DO NOT rest the pole-unit on its base after
the shipping brace has been removed.
Damage to the operating shaft can
occur.
Figure 31. Position the pole-unit base just above the cross base.
Cross base
Pole-unit
Figure 32. Unbolt the shipping brace.
Shipping brace
B\,–11 31 bolt
S&C Instruction Sheet 731-502 19

Installation on S&C Mounting Pedestals
Step 31
Place the pole-unit in the cross-base channel
so that the mounting bosses are aligned with
both sides of the cross base and the mounting
bracket. See Figure 33.
Step 32
Attach the pole-unit base to the mounting
bracket and both sides of the cross base using
the B\,–11 stainless-steel studs furnished. Both
the top and bottom mounting bosses must be
used. Screw each stud until it bottoms, approxi-
mately 8 to 9 turns. DO NOT remove the hoist
sling or lifting device from the pole-unit at this
time. See Figure 34.
Figure 33. Place the pole-unit in the cross base channel so that the mount-
ing bosses are aligned with the holes on the cross base and pole-unit
mounting bracket.
Cross base channel
Pole-unit
Pole-unit mounting bracket
Electrical junction box
Figure 34. Attach the pole-unit base to the mounting bracket and both
sides of the cross base.
Pole-unit
Cross base
Mounting bracket
20 S&C Instruction Sheet 731-502