S&C Mark V User manual

S&c Circuit-Switchers - Mark v GroundingSwitches - 70,000 Amperes Momentary
Outdoor Transmission
I
With 90-degree opening blades
perpendicular tobases when open
For Circuit-Switchers rated
230 kv
INSTRUCTIONS
- - - - - - - - - - - - - -
For FieldAssembly and Installation
I INTRODUCTION I
CAUTION: Theequipmentcoveredbythis publication
must be selected for a specific application and it must
beinstalled,operated,andmaintainedbyqualified
personswho arethoroughly trained and whounderstand
any hazardsthat may beinvolved. Thispublication is
writtenonly
for suchqualifiedpersonsandisnot
intended to beasubstituteforadequatetrainingand
experience
in safetyproceduresforthistype of
equipment.
Theseinstructionsare for field assembly(erection)
and installation of manually operated S&C Grounding
Switches,rated
70,000 amperesmomentary,when
furnished as
original equipment for Mark V Circuit-
Switchersrated
230 kv.Supplementaldimensional
detailsforthegrounding-switchinstallationare
includedontheerectiondrawingfurnished for the
applicable Circuit-Switcher.
(NOTE: If a groundingswitch is to beadded to an
existing Circuit-Switcher installation, thecomponents
shouldbeassembled inaccordancewiththespecial
drawings provided.)
Theinclusion of
a groundingswitchrated
70,000 amperesmomentary is designated by the addi-
tion of the suffix “-G3” to the Circuit-Switchercatalog
number.
Installthegrounding switchonly after the Circuit-
Switcheranditspowertrain have beencompletely
installed and adjusted.
Grounding-switch components and subassembliesare
packaged separately for shipment. They are tagged and
keyed tothebill
of material on theerection drawing
to facilitatefield erection.
Study the erection drawingcarefully to determine the
overall configurationandthe arrangement
of compo-
nents.Then proceed
as directed inthe step-by-step
instructions whichfollow.
Supersedes Instruction Sheet 71 1-630 dated 6-5-78 @ 1986
INSTRUCTION SHEET 7 1 1
S&C ELECTRIC COMPANY. Chicago Page 1 of 9
S&C ELECTRIC CANADA LTD.. Rexdale July 14, 1986

S8C Circuit-Switchers - Mark V Grounding Switches - 70,000 AmperesMomentary
Outdoor Transmission
I
With 90-degreeopening blades
perpendicular to bases when open
For Circuit-Switchers rated
230 kv
I
Step 1
ForeachCircuit-Switcherpole-unit,assemblethe
grounding-switch live parts as follows:
(a) Mount thejaw-contact assembly on the side of the
Circuit-Switcherterminalsupportcasting (at the
interrupter end) using the %”-1
1 X 1 %” stainless-
steel hex-head capscrewsand lockwashers fur-
nished. See Figure l. Thescrews used to attach the
jaw contactshouldbeleftlooseenoughfor
adjustment.
(b) Attach thegrounding-switch mounting angles to the
Circuit-Switcherbase as shownontheerection
drawing and Figure
1.
(c) Attachfour%”-ll X 4%” threaded rods tothe
mounting angles; each usestwo hex nuts.Tighten
the nuts securely. Then attachathird hex nut-used
to level the grounding-switch assembly-to each of
thefourthreaded rods, positioned
so thatthe top
surfaceof eachnut is approximately 1% inches above
the top surfaceof the mounting angles.
(d) Installthegrounding-switchassemblyatopthe
threaded rods and leveling nuts using the -lock-
washers and hex nutsfurnished.
Loosely tighten
these uppermosthex nuts.
Slowly close the grounding-switchblade intothe
jaw-contact assembly, until the blade contact just
enters the jaw-contactfingers. The blade contacts
shouldenter the jaw-contactfingerson-center; if
adjustment is required, raise or lower the appro-
priatelevelingnutssupportingthegrounding-
switch assembly. To avoid changing the effective
height of the assembly,
do not aa!just more than three
of the four leveling nuts. When on-center blade travel
has been attained,securelytightentheboltsthat
fasten the jaw contact.
(0 Adjust the leveling nuts further so that the ground-
ing-switch blade applies adefinitepressureto the
jaw-contactfingers on closing (toensure positive
contact engagement) and rests against its stop when
fully closed.Checkforproper blade closure by
pulling the blade away from its closed position. See
Figure 1. With the blade fully closed andresting
against the nylon stop in thejaw assembly, it should
be possible to move the blade no more than 54 inch
beforemeeting positive resistance.Whenproper
blade closure has been attained, securely tighten the
uppermostset ofhex nutsusedtoattachthe
grounding-switch assembly to themounting angles.
(g) Attach the flexible strap, for current transfer at the
hinge end of the blade assembly, to the grounding-
switchmounting angle using the
%” stainless-steel
hardwarefurnished.Thenconnectthemounting
angle to a suitable earth ground.$
Step 2
Mountthe outboardbearing assembly at the position
shown onthe erection drawing. See Figure 2.
Step 3
Mountthe S&C ManualGearedOperating Handle in
the position shown ontheerection drawing.
Attach a universal coupling or a flexible coupling to
the output shaft of the geared operating handle. Refer
to the erectiondrawingand to Figure
2. If a flexible
coupling is used, threadtheattachment bolts through
the flexible coupling plate andthroughthecoupling
flangeontheoutput shaft.Tightenthe bolts to draw
operatingandsafetyprocedures of certalnelectricutility companies.
The grounding recommendatlons herem may differ from the standard
Where a discrepancy exists, the operatlng proceduresof the electric utility
apply.
7 11 m630 INSTRUCTION SHEET
Page 2 of 9 S&CELECTRICCOMPANY Chicago
July 14,1986 S&C ELECTRICCANADALTO.. Rexdale

I INSTALLATION -Continued I
the flexible plate flushagainst the flange; this will
deform thethreadsinthe flexible plate, resultingin
abinding,nonslipconnection. Installand tighten the
self-locking nuts.
Do not uselockwasherswith the
attachment bolts.
Step 4
Install the vertical operating-pipe section(or sections)
and, if required,theguidebearingassembly (or
assemblies)betweentheuniversalcouplingatthe
outboardbearing assembly and the universalcoupling
orflexible couplingatthehandle.Workfromthe
outboard bearing assembly downward.
Notethat, if morethan one verticaloperating-pipe
section is specified, a universal coupling is used to join
theupperpipesectiontothenextpipesection. Any
additional pipe sections are joined with rigid couplings.
For each coupling, make certain that the cutting tips
of the piercing set screws do not protrude through the
body of the coupling. Torque the clamp boltsto final
tightness. Thentighten thepiercing setscrews, piercing
the pipe,and continue turning until a firm resistance
is felt.
Step 5
Fully close eachgrounding-switch blade assembly. Attach
aflexiblecoupling (or couplings) to each grounding-
switchoperatingshaft,asshownontheerection
drawing,Notethat,in some instances, theinterphase
drive lever is attached directly toone of the grounding-
switchoperating shafts; in suchinstances, the flexible
coupling is to be subsequently attached totheinterphase
drive lever.
Threadtheattachment boltsthrough the flexible
coupling plate and through the coupling flange on the
shaft. Tighten the bolts to draw the flexible plate flush
against the flange; this will deform the threads inthe
flexible plate, resultinginabinding,nonslipconnec-
tion. Installand tighten the self-locking nuts. Do not
use lockwashers with the attachmentbolts.
Step 6
Installtheinterphase operating-pipesections inthe
flexible couplings. All pipe is furnishedprecut to the
correctlength, For each coupling, make certainthat
thecuttingtips of thepiercingsetscrewsdonot
protrude through the body of the coupling. Tighten the
clamp bolts but
do not tightenthe piercing setscrews at
this time.
Notethat,in some instances, the interphase
drive lever is attached to the interphase operating pipe
via flanged pipeconnections; in suchinstances,first
make up thisconnection,theninstall the interphase
operating pipe in theflexible couplings.
If morethan one pipesection is required for each
phase-to-phase span,connectthesectionswith rigid
pipe-to-pipe type couplings.
Step 7
Install the interphase drive link between the adjustable
clevis assembly (or assemblies) at the outboard bearing
assembly and the interphasedrive lever. Make certain
that the cutting tips of the piercingset screws
do not
protrudethroughthebody
of the clevisassembly
coupling. Tighten the U-bolts equally
so that they pull
down evenly; thentightenthepiercingset screws,
piercing the pipe, and continue until a firm resistance
is felt.
Step 8
Using the manualgearedoperating handle, crank the
groundingswitchto the fully open position andthen
INSTRUCTION SHEET 7 1 1 430
S&CELECTRICCOMPANY Chicago Page 3 of 9
S&C ELECTRICCANADA LTD.0 Rexdale July 14,1986

S%C Circuit-Switchers - Mark V Grounding Switches - 70,000 AmperesMomentary
Outdoor Transmission
I
With 90-degreeopening blades
perpendicular
to bases when open
For Circuit-Switchers rated
230 kv
INSTALLATION - Continued I
tothe fully closed position to check three-polegroup
operation. In theevent that it is necessary to adjust one
or two poles formoreor less travelin the closing
direction to attainsimultaneity, it can be accomplished
by loosening the clampbolts which were tightened in
Step
6. Use the gearedoperatinghandleto move the
power train in theappropriate direction. Then retighten
the clamp bolts. Note that it is usually necessary, when
closing, that the grounding-switch blade farthest from
the outboardbearingassembly lead thegrounding-
switch blades which are nearer, to compensate for lost
motion in theinterphase linkage.
Do not attempt to change the openand closed stops for
the grounding-switch assembly drive levers. These stops are
factory set toprovide,
for all three blade assemblies, equal
travel as well as the required positive-toggle condition when
closed.
Whenthree-polegroupoperation is satisfactory,
torque to final tightness the clamp bolts on theflexible
couplingsatthe grounding-switchassemblies. Then
tighten the piercing set screws, piercing the pipe, and
continue turning untila firm resistanceis felt.
Step 9
Check the cranking-direction label located on the front
of themanual gearedoperatinghandle.Ifthe“To
Open”and“To Close” crankingdirectionsindicated
are incorrect,remove the screws holding the cranking-
direction label-an alternate-reading label is attached
behind it andshould be used instead. See Figure
3.
Step 10
If a key interlock is not specified, omit Step 10.
The key interlockgroupincludesaSuperior Key
Interlock, Type B-4003-1, with stainless-steel locking
bolt, zero bolt projection,and %-inch bolt travel; a
hinged dustcover; an interlockadapter; and an interlock
collar which is bolted to the output shaft of the manual
gearedoperatinghandle.Theinterlockcollar is
provided witha slot to accept the key interlockbolt.
If “provision only” for a key interlock is specified, the
interlock will not beincluded. Proceed as follows:
(a) Using themanual gearedoperating handle, crank
(b) Remove the bolts which fasten the interlock collar
the grounding switch to its fully open position.
to the outputshaft.
(c) Rotate the interlock collar to the position where the
key interlock bolt, when extended, will be centered
in the slot in the collar. Then replaceandtighten
the boltstofasten theinterlockcollarinthat
position.Notethatthese same bolts arealso used
for the“Open”and “Closed” position indicators,
which are tobe set as described in Step 11.
Step 11
Using the manual geared operating handle, crankthe
grounding switch to its fully open position and set the
“Open” positionindicator on theoutput shaft of the
manual geared operatinghandle
so that thisindicator
is visible from the front of the handle. Then fully close
the grounding switch and set the “Closed” position
indicator ontheoutput shaft of themanual geared
operatinghandle
so that thisindicator is visible from
the frontof the handle.
7 11 m630 INSTRUCTION SHEET
Page 4 of 9 S&CELECTRICCOMPANY 0 Chicago
July 14, 1986 S&CELECTRICCANADA LTD: Rexdale

1 INSTALLATION - Continued
1
Jaw-Contact n
Ftngers
Blade
/
Contact
Crank-Arm
Stop
Interruoter-End
%-inch maximum
allowabledeflect1
GroundiG-
Swltch
Blade
1 Open-
1 %"
'\
Open
Crank-Arm
stop
"1 'I"
%"-ll x 1 %"
Stainless-Steel
Hex-Head Cap
Screws and
Lockwashers
/
Support
igure 1. Grounding-switch live parts attachment detail.
INSTRUCTION SHEET 71 1430
S&C ELECTRICCOMPANY Chicago Page 5 of 9
S&C ELECTRICCANADA LTCI.. Rexdale July 14, 1986

S&C Circuit-Switchers - Mark V Grounding Switches - 70,000 AmperesMomentary
Outdoor Transmission
I
With 90-degreeopening blades
perpendicular
to bases when open
For Circuit-Switchers rated
230 kv
1 INSTALLATION - Continued
I
Outboard Bearing Assem
(mayalso be mounted
on
a separate base)
Interphase Drive Lmk
A4
Plan View
End View
Figure 2. Typical three-pole grounding-switch configuration.
71 1430 INSTRUCTION SHEET
Page 6 of 9 S&CELECTRICCOMPANY.Chicago
July 14,1986 S&C ELECTRICCANADA LTII. Rexdale

I INSTALLATION - Continued 1
Groundmg
Vertical Operating Pipe
Strap
Universal Coupling or
Flexible Coupllng
S&C Manual Geared
Operatmg Handle
Section A-A
Attachment Bolt
Flexlble Coupling
Self-Locking Nut
Flexible Coupllng Attachment
letail
01 Typical
INSTRUCTION SHEET 7 11 430
S&C ELECTRICCOMPANY Chicago Page 7 of 9
S&CELECTRICCANADA LTD.9 Rexdale July 14, 1986

S&C Circuit-Switchers
- Mark V Grounding Switches - 70,000 Amperes Momentary
Outdoor Transmission
I
With
go-degree opening blades
perpendicular to bases when open
For Circuit-Switchers rated 230 kv
INSTALLATION
- Continued
Step 12
Ground the vertical operating pipe as follows. Fasten
the end of the flexible strap having the shorter ferrule
to the vertical operating-pipe section, a few inches
above the manual operating handle, using the connector
provided. Then connect the free end of the flexible strap
to a suitable earth ground, using the grounding connector
at that end of the strap.1
Step 13
If the S&C Manual Geared Operating Handle is
furnished with an auxiliary switch, catalog number
suffix
“-Q” ‘or “-W,” the switch will be mounted inside
the operating-handle enclosure, along with a terminal
block for user’s connections. Each auxiliary-switch
contact is operated by a cam-actuated roller. A contact
is closed if its roller is disengaged from a cam and,
conversely, a contact is open if its roller is engaged by
a cam. The cams are individually adjustable in
4.5-degree increments. Adjustment of the cams is
accomplished as follows:
(a) Raise (or lower) the cam toward its adjacent spring
until the cam is separated from the teeth of the inner
gear. See Figure 4.
(b) Rotate the cam to advance or retard engagement
with its roller.
: The grounding recommendations herein may differ from the standard
operating and safety procedures of certain electric utility companies.
Where a discrepancy exists, the operating procedures of the
electric utility
apply.
(c) Lower (or raise) the cam making sure that the teeth
are in mesh with the inner gear.
Terminal Block
(included with
optional auxiliary
switch)
I-
Optional Auxiliary
Switch (catalog
number suffix
“Q’ or “+,q
I
Conduit-Entrance Plate Padlocking
Provision
Optional Key Interlock
(catalog number suffix
“-L”)
Figure 3. S&C Manual Geared Operating Handle.
71 l-630
INSTRUCTION SHEET
Page 8 of 9
S&C ELECTRIC COMPANY. Chicago
July 14,1986
S&C ELECTRIC CANAOA LTD.* Rexdale

1 INSTALLATION - Continued I
Contact (closed)
Roller
Inner Gear
Cam (lowered
toward adjacent
spring)
Adjacent Spring
Figure 4. Adjustment of cams on auxiliary switch.
INSPECTION SCHEDULE AND PROCEDURES
To assure the grounding switch’s continued proper procedures, incidentally, take the place of the annual
performance, it should be inspected in accordance with exercising which has, up until the October 28, 1985
S&C’s recommended schedule and procedures
con-
issuance of Instruction Sheet 711-590, been recom-
tained in S&C Instruction Sheet 711-590. (These mended for Circuit-Switcher and its operator.)
q
INSTRUCTION SHEET 7 11430
S&C ELECTRIC COMPANY l Chicago
Page 9 of 9
S&C ELECTRIC CANADA LTD.. Rexdale
July 14,1986