fused load-break switch

GEI-77040CINSTRUCTIONSAND SUPERSEDES G E I.7 7 0 4 0B

RENEWAL PARTS

4 FUSED LOAD-BREAK SWITCH

feSr-**£*

TYPESSS- IO-OSE- IO- I

J;*<v

&r;/

• i

V'•i. vi

CONTENTS

INTRODUCTIONRATINGSRECEIVING, HANDLING

AND STORAGEINSTALLATION ....DESCRIPTION OF OPERATIONADJUSTMENTSMAINTENANCEREPLACEMENT OF PARTSRENEWAL PARTS

33 ; / v, ». *:*ov'

x-/*&* ,st*g <-«$* * " __

>v_giisteagaiililsa#

s

3 %*r ./JVJ •£*,; •> '* *-A

V.* *

'5 i'* 4

*-Vl 5 *r' » -1 ^T“ w5 *!<•r'«: ~/V7

131516

H I G H V O L T A G E S W I T C H G E A R D E P A R T M E N T

G E N E R A L mr*MU E L E C T R I C

P H I L A D E L P H I A , P A.

www.nationalswitchgear.com

Courtesy of NationalSwitchgear.com

GEI-77040 SE-10 Fused Load-Break Switch

•v>

5

V

64

r

'r- • L *i' -r SiVE? *?

, f

V -W"- »- & CM03. A * f ,*„

'I, n'*'. • •1s \SD‘,s- co

3 s>M 8

,»sa«o- 5'* ^

4 3,f-.,*"V i

+M

9 u_

7i <* y. v^.;>’»

s'*,;r>- x

.«

'» i-- •’?

CMu5M3DOCMo0

CD>oo

7. Operating Shaft8- Switch Nameplate9. Test Fosition Stop

10. Interrupter Switch11. Shutter Caro

1. Front Cover2. Handles3. Racking Area4. Indicator5. Insulating Barriers6. Mechanism

Front View of SE-10 R / 0 Fused Load-Break SwitchFig. J

2



SE-10-0 AND SE-10-1FUSED LOAD-BREAK SWITCH

INTRODUCTION

conjunction with an interrupter switch.The fuses are used to clear all short cir-cuit and overload currents above the inter-rupting ability of the switch. The fusesare so arranged on the device that theyare located on the source side of theswitch thereby providing maximum pro-tection for the switch. The size and ratingof the fuses depends upon the individualapplication and are such that proper co-ordination with other devices connected tothe equipment is achieved.

A full load-interrupter switch is pro-vided to interrupt all load currents rangingfrom transformer magnetizing current tothe full load continuous current rating

Type SE-10 fused load-breakthe removable element for use

of the equipment. The interrupting abilityof the switch is accomplished by the useof an arc chute type interrupter workingin conjunction with an auxiliary blade,booster cylinder and magnetic blowoutcoil.

Theswitch iswith the fused load-break switch equipment.The unit Is a manually operated, storedenergy, triple pole device capable of suc-cessfully closing as well as interruptingall currents within the short circuit ratingof the equipment. The removable arrange-ment of the device provides such advantagesas ease in inspection, reduced maintenance,simplified installation as well as completeinterchangeability with other units.

A manually operated stored energymechanism located on the front of thedevice Is used for both opening as wellas closing of the switch contacts. Closingand opening is accomplished by a storedenergy mechanism capable of closing andlatching the switch contacts against shortcircuit currents up to its momentaryrating.

The Interrupting ability of the deviceis accomplished by a combination of cur-rent limiting type power fuses working In

RATINGSCONTINUOUS

CURRENTAMPS

LOAD BREAKCURRENT

AMPSNOMINALVOLTAGE

MAXIMUMDESIGN

VOLTAGEBILTYPEKVKV

KV

600 6002.75 452.4O Oand

O 1-112005.5 604.8

o o 757.2 8.25W Ww w 14.5 9513.2

TABLE I

RECEIVING, HANDLING AND STORAGERECEIVING AND HANDLING the packing list to be sure that nothing has

been overlooked. 2. The switch should be stored in aclean location free from corrosive gasesor fumes.taken to protect the equipment from mois-ture and cement dust, as this combinationhas a very corrosive effect on manyparts.

Particular care should beImmediately upon receipt of theswitch,an examination should be made for lossor damage sustained in transit. If In-jury or rough handling is evident, adamageclaim should be filed Immediately withthe transportation company and the near-est General Electric ApparatusSales Officeshould be notified.

It is expected that due care will beexercised during the unpacking and instal-lation of the switch so that damage willnot occur from careless or rough hand-ling, or from exposure to moisture or dirt.Care should also be taken to prevent toolsfrom striking the crate as well as anypart of the switch. Loose parts assoc-iated with the switch are always includedin the same crate. Check all parts against

STORAGEIt Is recommended that the switch be

placed into service immediately in itspermanent location.

If this Is not possible, the followingprecautions should be taken to insureprop-er storage conditions:1. The switch should be carefully pro-tected against condensation, preferably bystoring it In a warm dry room sincewater absorption has an adverse effecton the Insulation parts. Switches for usein outdoor equipment should be stored inthe equipment only when power is availableand the heaters are in operation to preventcondensation.

3. Machine parts of the operatinganism, etc., should be coated witnoil or grease to prevent corrosion.

mech-heavy

If the device is stored for long per-iods of time, periodic inspections shouldbe made to insure that corrosion of metal-lic parts or deterioration of Insulationparts has not begun. Should the switchbe stored under unfavorable conditions,steps should be taken to dry out or replaceinsulation parts before placing in service.

These instructions do not purport to cover all details or variations in equipment nor to provide for every possiblecontingency to be met in connection with installation,operation or maintenance. Should further information be desiredor should particular problems arise which are not covered sufficiently for the purchaser's purposes, .the matter shouldbe referred to the General Electric Company.

3



GE1-77040 SE-10 Fused Load-Break Switch

04O=tCNlO<o

CM

cna.

coorJ-04oco

COCN

cnLU

A. Mechanism Uncharged - Switch Open B. Mechanism Charged for Closing - Switch Open

66

a>a>COr-OJo8 CO

tOoCN

cn9\ Z u.fj*** "̂ XSPTX”'

12

10^' - i

yT&Xf * - .

§!§&£/

^ :

1

coCT)COC. Mechanism Uncharged - Switch Closed IN,D. Mechanism Charged for Opening - Switch Closed CNoCO

9. Shaft10. Center Crank11. Output Crank12. Hub13. Boomerang Line Pin14. Boomerang Shaft15. Cable Cam Shaft

1. Cable2. Cable Cam3- Roller4. Canoe Link Pin5. Handle Socket6. Link7. Pin8. Links

oCM

O)

u_

Fig. 2 Cutaway View of SE-10 Operating Mechanism

4

*



SE-10 Fused Load-Break Switch GEI-77040

INSTALLATION

5. Primary Contact Alignment (Referto Page 9).

6. Primary Contact Wipe (Refer toPage 10).

to make certain they are moving freely.(Refer to Closing and Opening operation.)

2. Arcing Contact Alignment (Referto Page 7).

Prior to placing the switch in servicethe following adjustment and alignmentchecks should be made to insure properoperation.

7. Trip Roller Clearance (Refer to3. Upper Runner Adjustment (Refer to1. With the operating springs blocked(refer to the item on "To Block OperatingSprings”) using the maintenance handle,operate the mechanism and switch slowly

Page 10).Page 9).8. Opening Dashpot Adjustment (Re-fer to Page 11).4. Arcing Tip Wipe (Refer to Page 8).

DESCRIPTION OF OPERATION

The SE-10 fused load break switch isa triple pole device consisting of currentlimiting type power fuses, an interrupterswitch and an operating mechanism, asshown in Fig. 2. The assembly is mountedon its own wheels so that it can easily beinserted into or removed from the station-ary housing of the equipment.

Each pole of the interrupter switchconsists of a primary blade assembly, anauxiliary or arcing blade assembly and anarc chute type interrupter. Both the clos-ing and opening operation of the switchis accomplished by the spring-chargedover-center linkage mechanism located onthe front of the device. The mechanismfor both opening and closing Is chargedto a point manually with the Operatinghandle at which time the operating springdischarges and operates the over-centerlinkage which in turn rotates the maincrank shaft and either opens or closesthe switch. In essence the load requiredto open or close the switch is independentof the speed of which the operator rotates

the operating handle but is supplied bythe energy stored in the operating springs. The interlock also prevents closing the

switch unless the device is either com-pletely engaged in the housing or in thetest position where the primary terminalsare Isolated.Primary connection of the load-break

switch assembly with the stationary hous-ing is made through ball end type studslocated on the rear of the device. A setof guides mounted on the wheel supportscorrectly align the primary studs whileinserting the roll-out assembly into thehousing. Grounding of the device Is as-complished through a ground shoe thatengages the ground bus of the stationaryequipment. Secondary disconnects arealso Included on those devices where aux-iliary switches are required.

RACKING OPERATION

The load-break switch assembly isracked into and out of contact with thestationary housing by use of a floatingtype jackscrew mechanism (5) Fig. 3.This mechanism is manually operatedfromthe front of the roll-out assembly (3)Fig. 1, and is used only for producingelec-trical contact between the removable andstationary elements of the equipment duringthe last portion of travel of the roll-outassembly. Before operating this mech-anism, the roll-out assembly must bepositioned within the stationary housingin the location where the racking mechanismtakes effect. The floating design of themechanism permits considerable engage-ment of the jackscrew with the stationary

The roll-out assembly is pulled intoand held in engagement with the station-ary housing by a jackscrew type rackingmechanism. A positive Interlock connectedto the operating mechanism permits in-sertion or removal of the roll-out assemblyonly when the switch IB open and the oper-ating mechanism completely uncharged.

co00toCOCNI

'• ‘y •- 1 foCO

s .< ..ISSI* 1. Rjses2. Rise Clips3. Primary Stud4. Insulator5. Racking Screw6. Through Primary Bushing7. Opening Dashpot Unit8. Booster Cylinder9. Primary Blade Assembly

10. Primary Fingers11. Shutter Cam12. Insulating Barriers13. Front Cover14. Mechanism Assembly15. Maintenance Nameplate16. Arc Qiute17. Mechanism Bolts18. Spring Housing Retaining Nuts19. Spring Blocking Plate Assembly

2pi

3 - -' ’*\it

LUr r'

«9 r“19? Ud- |44 * r s ri

*K 15

7 173 -B-? — -V

*4*mv r. jJEdteM t"'9 </ >V 7

10 * i•v16^»r-'*- •V- f .•

IJ

Fi g. 3 Side View SE-10 Fused Load-Break Switch

5




engage the center crank (10), also ro-tating it in the counterclockwise direction.This motion in turn charges the operatingsprings through (canoe) link (8) and (boom-erang) link (6), cable cam (2), and cable (1).

1 gffgjfijr- yv * vr-i

' • . , «!- o•vShortly before the end of the oper-

ating handle stroke, the mechanism linkagereaches a toggle position as shown inFig. 2B. In this position the springe are

4 fully charged. As the rotation of thec operating handle continues, the toggle in3 the mechanism linkage is broken and the

^̂ 5— 6 energy stored in the operating springs con-tinuee to rotate the center crank (10) inthe counterclockwise direction. The centercrank in turn engages the pin in the outputcrank (11) also rotating it in counter-clockwise direction. This action closesthe switch through the shaft (9).

o>3

” L‘ 1

CDCO{ f. SCD

cnru-2

1. Racking Nameplate2. Racking Entrance Area3. Truck Handle4. Switch Position Nameplate5. Operating Coupling6. Switch Position Semaphore

Shortly after the spring begins torotate the center crank, the operatinghandle reaches the end of its stroke andis in position for the opening operation.Fig. 6, Photo sequence Fig. 2A, Fig. 2B,Fig. 2C, illustrates the complete closingoperation of the mechanism.

It should be pointed out that at anytime during the operation prior to thetoggle position, the operating handle canbe returned to Its initial position, andthe mechanism linkage returning to itsuncharged position as shown in Fig. 2A.

OPENING OPERATION(Ref. to Fig. 2A, B, C, D)

To open the switch, ihsert the opera-ting handle (1) as shown in Fig. 0. Rotatethe handle in a clockwide direction (from

Fig. 4 Front View of SE-JO R /0 Auto-BlastInterrupter Switch ii>

COOCO1. Operating Handle (Switch in the Close

Position)oCO

2. Switch Position Nameplate3. Truck Handle in

4. Racking Shaft Nameplate5. Racking Shaft Area6. Switch Position Semaphore

&

Li-Fig. 6 Front View of SE-10 R /0 Auto-Blast

Interrupter Switchbottom to top). This action rotates hub (5)Fig. 2C so that the pin on the hub turnslink (10). The linkage motion is trans-

1. Operating Handle (Switch in OpenPosition )

2. Truck Handle3. Racking Nameplate4. Racking Entrance Area5. Switch Position Nameplate6. Switch Position Semaphore <£><22

COFig. 5 Front View of SE-10 R /0 Auto-BlastInterrupter Switch

00CMoCO

portion before overcoming the pressureof the primary disconnect studs as wellas permitting some degree of misalignmentbetween the mating parts.

CO

o»u-

r -> -ifNOTE: The switch R/O can be rackedinto or out of the unit only when the switchis in open position. A blocking plateprevents insertion of the racking handlewhen the mechanism Is closed. In caseof a situation where it is desirable torack the device out of the unit and defeatthis blocking plate, first insure that powerto the switch nas been cut off , then removethe racking shaft nameplate (1) Fig. 4.Directly

^behind the nameplate there Is an

available area which will allow the re-moval of the blocking plate. Thus fheswitchmay be racked out in the closed position.

6.’I

CMCOCOCM

* oCO(£ 0F ROLLER

3/16 MINIMUMCLOSING OPERATION(Ref. to Fig. 2A, B, C, D)

Closing of the switch is accomplishedby inserting the operating handle (1) Fig.5,into the socket (5A) and rotating it incounterclockwise direction from the top tothe bottom as far as possible towards thevertically down position, Fig. 6. Thisaction causes the pin in the hub (12) to

Ol

u_

1. Auxiliary Blade Assembly2. Primary Blade3. Trip Roller4. Trip Latch (Surfaces of P10)5. Primary Contact Fingers

6. Arc Chute Asaemhly7. Arc Chute Bolts8. Assembly Bolts9. Core Bolt

10. Arc Chute Supports

F i g. 7 Interrupter Switch in Latched Position

6




- IilfftIpmkM

w*

inN

1• Air Cylinder2 . Connecting Rod3. Mounting Bolts4. Arcing Tip5. Arc Chute Assembly6. Insulators7. Arc Oiute Mounting Bolts8. Upper Arc Runner9. Lower Arc Runner

10. Blow-out Coil

ztc*jQoo

2CO

O'U

_- ' Vs

r

1. Screw to Retainer Spring Cable2. Mechanism Housing

SE-10 R /0 - Showing Mechanismhousing

Fig. JO

Fig. 8 Cross Section of Interrupter Switch on SE-10 Assembly

the primary blade (9) Fig. 3 breaks fromthe stationary contacts (2) Fig. 7, shuntingthe current through the arcing blade (4;Fig. 8.

00oo£CNOOO

OJ While the primary blade Is openingthe arcing blade opens with a snap actionestablishing the arc between arc runners(8) Fig. 8 and (9) Fig. 8. The arc is direct-ed into the arc chute by first a blast of airfrom tne cylinder (1) Ftg. 8 and secondthe blow-out coll (10) Fig. 8 which mag-netically pulls the arc Into the arc chute(5) Fig, 8, where it Is extinguished. Atthe position where the arcing blade Bnapsopen, the opening dashpot assembly (7)Fig. 3, comes into play, limiting the open-ing speed of both the primary blade (2)Fig. 7 and the arcing blade (4) Fig. 8.This speed reduction allows the properamount of air to be Injected Into the arcstream during the Interrupting process.The opening dash-pot also absorbs theexcess energy transferred through themechanism linkage by the operating springduring operation.

Ol

Li-

J -1. Maintenance Operating Handle2. Switch Position Nameplate3. Device Nameplate4. Truck Handle5. Racking Shaft Nameplate6. Racking Shaft Area7. Switch Position Semaphore=*•o>

£CN Fig. 11 SE-10 R / 0 Auto-Blast interrupters

This will remove the cabletn Fig. 10.and the ball end from the cable cam.Replace and tighten the retainer. Insertthe maintenance handle as shownTn Fig.10.This will allow operation of the mechanismand blade assembly with the operatingsprings blocked and out of the mechanicalsystem. A nameplate (2) Fig. 9 attachedto the device lists specific steps to followfor this maintenance operation. To placethe equipment back in operation reversethe above procedure.

o

Cl TO BLOCK OPERATING SPRINGS(Ref. to Fig. 9)

Before blocking the operating springs,make sure the switch Is in the open posi-tion and removed from the unit. Insertthe operating handle, rotate the handle

mltted through links (0) & (8) turning cable countercloctoyise approximately 30° untilcam (2) and compressing the operating spring blocking plate (1) Fig. 9 can bespring through the cable (1). As the inserted tn the position as shown in Fig. 9.operating handle is rotated a point is NOTE: With this plate in position thereached where the mechanism linkage goes R/O cannot be inserted into the unit. Re-over center discharging the springs. This lease the operating handle so that theIn turn rotates shaft (9) and thus opens springs are resting against the two pinsthe switch. For the mechanism opening 0f the spring blocking plate. Remove thesequence of operations, refer to Fig. 2 cable retainer by loosening the retainer(C, D, A). When the switch starts to open, screw and rotating the retainer as shown

1. Spring Blocking Plate2. Maintenance Operation Nameplate

u_

Fig. 9 SE- J 0 R / 0 Spring BlockingPlate in Position

NOTE: Use the operating handle (1) Fig. 5("Z" shaped handle) when the spring isattached to the mechanism and the main-tenance handle (1) Fig. 11 (box shapedhandle) when the springs are blocked outof the mechanical system.

COo>£CVJoCO

ADJUSTMENTScn

Lt_

Although the switch has been completely vtsable to review all adjustments beforeadjusted, operated and inspected at the placing the switch in service, making re-factory, it is possible that unusually rough adjustments wherever necessary,handling during transportation may havecaused some loosening or disturbance ofparts of the apparatus. It is therefore ad-

ANISM UNLESS THE OPERATINGSPRINGSHAVE BEEN BLOCKED. (See "To BlockOperating Springs"). This is required topermit ease of operation during adjustmentcheck and prevent injury due to accidentaloperation. The switch should not be stored

DO NOT WORK ON OR MAKE ANY AD-JUSTMENTS TO THE SWITCH OR MECH-

7



GEl-77040 SE-10 Fused Load-Break Switch

energy operated, unless the switch hasbeen operated through the complete strokeseveral times with the springs in the blockedposition, and alter the final inspection iscomplete.

All adjustments should be checked notonly during the initial installation of theswitch, but also during periodic inspectionsand whenever repair or replacement ofparts becomes necessary.

The following adjustments are listedin the order in which they should be checked.Before checking the adjustments, removethe front cover and necessary barriers sothat all parts are accessible.

<x>cnOJ03

&

CNT

cnLi—

3 +<£4-32.

it?6 64- ARCING CONTACT ALIGNMENT

Open and close the switch slowly andobserve the arcing tip (4) Fig. 8. asit enters the arc chute assembly (5).The arcing tip should pass completelythrough the lower arc runner (9) withouttouching and be centrally located in thecenter of upper arc runner (8) and makingcontact with it. If the travel of the arcingtip is parallel to the center line of thearc chute, but not centered, adjustment

by loosening the arc

O ro64

\ iraFig. 12 Runner and Arc Tip Relation can be made

4

5

2 33

I

vlp'lfSggfllsi9mSpl;

r {v.

;v:>./*/

z±inoCOooo

d-1. Screw Driver2. Upper Arc Runner3. Lower Arc Runner4. Arc Chute Side5. Blowout -Coil

cn1. Sharp-nose Pliers2. Upper Arc Runner3. Lower Arc Runner4. Arc Chute Side5. Blowout Coil

u.

Fig. 14 Auto-Blast Switch Device Interrupter AssemblyFig. 13 Auto-Blast Switch Device Interrupter Assembly

8




chute mounting bolts (7), and shift thearc chute in the proper direction. Tightenthe mounting * bolts and recheck the ad-justment. If the arcing tip travel is notparallel to the center line of the arc chute,-s adjustment can be made by loosening the

? arc chute mounting bolts (7) and swingingo the lower end of the arc chute in the propero direction while retightening the bolts.oo

UPPER RUNNER ADJUSTMENT(Refer to Fig. 12)

in

AType SE-10-0 DesignLi—

The opening in the upper runner, Fig.12should measure 1/8" + 0" - 1/64".Type SE-10-1 Design

The opening in the upper runner, Fig.12,Should measure 3/32" + 1/64" - 0". Therunner opening of both the -Oand -1designscan be measured by using an extended setof feeler gages. If the opening is too wide,use a pair of sharp nosed pliers (1), topinch the runners together as shown inFig. 13. If the opening is too narrow, usea screw driver to pry the runner apart asshown in Fig. 14. Under no circumstancesshould the side of the arc chute be usedas a pry, for the material is brittle andmay tend to crack.

1. Arc Blade2. Upper Arc Runner3. Lower Arc Runner1'. Arc Oiute Side5- Blowout Coil

ARCING TIP WIPE

When the switch has been positionedwith the trip rollers in the latched posi-tion, as shown in Fig. 7, (the primary con-tacts and blade are not made), there shouldbe electrical contact between the arcingtip (1), Fig. 15 and the upper arc runner(2), Fig. 15. This can be determined bychecking the circuit with a light indicator,bell set or continuity tester, as shown inFig. 16.Type SE-10-0 Design

The wipe of the tip should be 1/64"maximum. To measure this a tie-in shouldbe made with the upper runner adjustment.If the runner opening measures 1/8", the

E wipe checking dimension should measure® 1/64", Fig. 12. If the runner opening mea-S sures 7/64”, the wipe checking dimension^ should measure zero, Fig. 12. In both

cases the arcing tip will have 1/64" wipe~ on the runner side that it is wiping. To

C7) check this, first block the closing springs£ (see "To Block Operating Springs"), de-

press the toggle rollers and insert a 1/8"thick retainer (6) on each pole as shown inFig. 17. Using the maintenance handle (2),Fig. 18, close the switch until the arcingtip makes electrical contact with the upperarcing runner. Then measure the arcingtip wipe.Type SE-10-1 Design

Auto-Blast Switch Device Interrupter Assembly /

I

The arcing tip should wipe on bothsidesof the upper runner. When it is adjustedin this manner, the wipe will vary from1/64" minimum, when the upper runner isset at 7/64", to 1/32" maximum, when theupper runner is set at 3/32",

PRIMARY CONTACT ALIGNMENT(Ref. to Fig. 19)

Open and close the switch slowly andobserve the position of the primary blades

1. Bell Set2. Primary Blade3. Upper Contact4. Be> li Set Lead5. Bell Set Lead6. Primary Contact

Side View Auto-Blast Switch R /o Assembly

9




»• v.s .f ' '

/u v. _ o- I- 'i

ti

5 iSV<as

•t ‘i-fjf

ni•v

r • £,.i *-v -•». s. s

1. Operating Handle2. Maintenance Handle

Fig. 18 Handles(4), on each pole as they enter the primarycontact lingers (8). The blade should becentrally located within the fingers. Toadjust for this, loosen the bushing mountingbolts (1) and shift the assembly laterallyuntil correct alignment is obtained. Tightenthe mounting bolts and recheck for correctalignment.

NOlOoO’)o<x>

PRIMARY CONTACT BEARING(Ref. to Fig. 19) uo

O!Check that each primary contact fingeris making contact with the primary bladewhen In the closed position,be checked using a .002” feeler gage ora thin film of grease. In the closed posi-tion, each finger should be pulled awayfrom the lower edge of the contact (7)Fig. 19. To adjust for correct bearing,loosen the mounting bolts (1), and rotatethe assembly slightly in the proper direc-tion. Tighten the mounting bolts and re-check for correct bearing.

U.This can

!• Toggle Roller2. l/8 n Thick Retainer3. Primary Blade4. Arc Chute Assembly5- Primary Fingers

Fig. 17 Side View Auto-Blast Switch R /0 Assembly

PRIMARY CONTACT WIPE(Ref. to Fig. 19)

When the switch Is closed slowly byhand, the clearance between the edge ofthe primary blades (4) and the front edgeof finger support (7) should be 3/32” to1/4". This can be adjusted by re-posttion-lng the bolted connection between the oper-ating rod and crank on the switch crossshaft

mam<T r-vj, t

II <

< V7 ** <' ‘.. . *' • .

' 008* FEELER "

>

[• > -S'•9

6...1.t

v.I TRIP ROLLER CLEARANCE

(Ref. to Fig. 20)

With the switch in the open position,depress the toggle linkage (2), on theauxiliary blade as far aB possible towardsthe hinge and slowly close the switch untilthe trip roller Is directly opposite the triplatches on the arc chute. In this positionthere should be a minimum of 3/32” to1/8"(and 1/32” difference betweensides) clear-ance between the latch and roller surface.This can be variedchute mounting boltschute assembly in the proper direction.

TRIP ROLLER BEARING(Ref. to Fig. 7)

Open the switch slowly until the arcingblade is in the latched position. In thisposition there should be a minimum of3/16" engagement between the latch and

Both rollers should make con-

- 1

:VS/-S

- |T

rHm.

1. Mounting Bolts2. Buffer Block3. Arcing Tip4. Primary Blade5. Trip Latch6 . Bushing7. Contact Block8. Contact Fingers9. Arc Chute Assembly

L*

vrjtd2

3M

F.;

Uj Lfr r e;.

.)4 coCO

[ d CO

<5 loosening the arcand sliding the arc

CM

' M o

at

cn,1“LL.

roller.Blade and Arc Chute AssemblyF i g. 1 9

10




V*

2

3

4

SURFACE OFROLLERCN

1. Booster Cylinder2. Nozzle3- Auxiliary Blade Assembly4. Primary Blade

u_

3. Trip Roller4. Trip Latch

Interrupter Switch Showing Trip Roller Clearance

1. Arc Chute Mounting Bolts2. Toggle Linkage

Fig. 21 Method of Checking Booster Cylinder Pressure

proper pickup or binds in the cylinderassembly.OPENING DASHPOT RESET

With the switch in the closed posi-tion, lift the dashpot cylinder to its fullextent and check the time for it to resetto its normal position. This time shouldbe 3 to 5 seconds. If the time is inexcess of this, check for binds betweenthe piston and cylinder or for clogging ofthe orifice. If reset time is too shortadditional oil is needed.

Fig. 20

tact within 1/64".three poles of the switch trip at the sametime. This can be checked by opening theswitch very slowly until the arcing bladestrip. The trip roller bearing can be variedby loosening the arc chute mounting bolts(7) and sliding the arc chute assembly inthe proper direction,

BOOSTER CYLINDER PRESSURE(Refer to Fig. 21)

The pressure in the booster cylindercan be checked by holding a finger overthe nozzle (2) in the booster cylinderwhen the auxiliary blade is held in itshighest position relative to the primaryblade. Under this condition the auxiliaryblade should be stationary or move veryslowly towards the primary blade. If thereturn of the auxiliary blade is rapid,the piston has become worn or damagedand should be replaced.

Also check that all In order to measure this torque,NOTE:it Is first necessary to disconnect theoperating rodB from the operating shaft.Adjustment can be made by loosening ortightening the nuts on the hinge stud.

OPENING DASHPOT(Refer to Fig. 22)

OPENING DASHPOT PICK-UP

Open the switch very 9lowly and meas-ure the travel of the opening dashpot,before the arcing blades trip. This travelshould be 1/32" - 1/16". The travel canbe increased by loosening the lock nuts (1)and lowering the entire dashpot assembly.

Also check that air is not present inthe dashpot.switch in the closed position by rapidlypulling up on the dashpot cylinder,air is present, the cylinder will movevery easily until the oil reaches the piston.If air is present the cylinder must beremoved and additional oil added.NOTE: When adding oil, set the levelat 2 1/8" - 2 1/4" from the inside bottomof the cylinder. Use Silicon Oil SF96(50).

OPERATING MECHANISM LINE-UP

Using the operating handle, operatethe mechanism several times through itscomplete stroke and check that all of thecranks, links, cams, and rollers are linedup and operate freely. This should bedone with the operating springs blocked.The relationship of the various links,cranks, etc. of the mechanism have beenset at the factory. If misalignment ispresent or the links are not completelyfree, examine the mechanism for damagedparts.

This can be done with the

If

PRIMARY FINGER PRESSURE

The primary fingers have the correctpressure when the finger retainer boltshave between 1 1/2 to 2 threads showingbeyond the head of the nut.

OPERATING HANDLE OVERTRAVELOPENING DASHPOT OVERTRAVELPRIMARY BLADE HINGE PRESSURE Remove the block from operating

springs and slowly rotate the operatinghandle until the switch operates. Con-tinue to rotate the handle until the handlesocket (5), Fig. 2A, reaches its stop,measuring the overtravel of the handlefrom the point where the switch operates.This distance should be approximately 2°.Measure the overtravelfor both the"OPEN1'and "CLOSE" directions of the handle.

With the switch in the fully openposition, check the overtravel of the dash-pot by lifting the cylinder. This travelshould be 1/16" minimum. The relation-ship between the pick-up and overtravelof the opening dashpot is set at the factoryand no adjustment is necessary. If in-sufficient overtravel is present, check for

The pressure at the hinge of the prim-ary blade can be checked by measuringthe torque required to rotate the bladeassembly.position, measure the torque required torotate the blade toward the closed position.The torque should measure 15-20 Inchpounds.

With the blade In the open

11




5 I;

/it

t* Iy 6W

L-_«

» Vir^.

I£5»

T{5I3 B l a i

Hlu ui

i

d... i

i 2+ 1 coI4—-psjjj

coo>COo ISO

3 CNlCM

u_

3. Cotter Pin4. Connecting Pin

5. Lock Washer6. Screws

1. Nut2. Links

Fig. 22 Opening Dash pot

inr-vco<7>CQ

o6coCM2f< Ol

3-L\ U-.

5 34

42 5

LO

cnco&1. Middle Link

2. Closing Stop3. Opening Stop

4. Closing Stop Shim5. Opening Stop Shim6. Center Shaft

1. Crank Shaft Link Stop2. Crank Shaft3. Closing Stop

4. Closing Stop Shims5. Opening Stop Bolt

CM

Fig. 23 Stop Assembly Fig. 24 Stop AssemblyLU

block has damage or binds. If, however, the over- anced by removing the dowel pinsandshift-travel in one direction is less than the tng the stop block in the proper direction,minimum while in the other direction it is This adjustment can only be done when themuch greater, the overtravel can be bal- complete mechanism assembly is removed

The location of the stopbeen set and doweled into position at thefactory. If insufficient overtravel is pres-ent, examine the mechanism linkage for

12




from the housing. Refer to the section onMAINTENANCE for removal of the mech-anism assembly.PRIMARY CONTACT GAP

(Refer to Figs. 23 & 24)

With the switch blade in the openposition the primary gap should be set at2-3/4" + 1/2" -l/4"f measured between thearcing horn and the lower arc chute runner.To adjust this gap to the above dimensions,add or remove shims (5), Fig. 23. If thisadjustment is made, place the switch bladein the open position and check to see thatlink (1), Fig. 17 hits at the same time or1/32” before link (1), Fig. 23 hits stop (3),Fig. 23. If this association is not held,adjust opening stop bolt (5), Fig. 24.

FINAL INSPECTION

Before placing the SE-10 into service,a final inspection should be made consist-ing of the following:

Check all nuts, washers, bolts, cotterpins, and terminal connections fortightness.

long period of time, it is recommendedthat the Insulation be checked before itis placed in service. A standard 60 cyclehigh potential test at 14,000 volts RMSfor the 4.8 kv switch and 27,000 voltsRMS for the 13.8 kv switch will normallyindicate whether the device is satisfactoryfor service. With the switch contacts inthe fully opened position, apply the highpotential to each terminal individually forone minute with all other terminals andthe frame grounded. After high potential ’

tests are made all organic Insulating ma-terials should be inspected for visibleleakage current paths, and necessaryactionmust be taken to replace insulation that mayhave been affected by moisture absorption.The high potential test is also recommendedfor devices which have been removed fromservice and stored over an extended periodof time under unfavorable atmosphericconditions.

See th^t all bearing surfaces of themechanism have been lubricated. Referto the section on LUBRICATION.Operate the device slowly several timesby hand and note that there is no ex-cessive binding or friction.Inspect all electricalwiring (if present)to make sure that no damage hasresulted during installation and testfor possible grounds or short circuits.See that any place where the surfaceof the paint has been damaged duringInstallation Is repainted immediately.Replace all barriers, covers and anyother parts that may have been re-moved during installation.Check that the current rating of thepower fuse is correct for the partic-ular application on which it is to beused.

HI-POTENTIAL TESTIf the device had been stored for a

2.

3.4.

j 5.

6.

7.NOTE: Before applying a hi-potential testremove the power fuses, connecting thefuse clips with a suitable wire or con-ductor.

1.

MAINTENANCE

Until such a schedulelocal conditions,is worked out, it should be lubricated ateach periodic inspection and also wheneveroverhauling or replacement of parts be-comes necessary. It Is also recommendedthat the device be operated at regularintervals to Insure it is operating freely.

Dependable service and safe operationof the equipment is contingent upon properoperation of the SE-10 load-break switchassembly. To maintain such service, itIs recommended that a definite inspectionand maintenance schedule be set up andfollowed, as serious shutdowns can oftenbe avoided by locating potential sourcesof trouble in an early stage.

BEFORE ANY MAINTENANCE WORKIS PERFORMED ON THE SWITCH OROPERATING MECHANISM MAKE CERTAINTHAT THE OPERATING SPRINGS AREBLOCKED. (See "To Block Springs”).

MECHANISM

A careful inspection should be madefor loose bolts, nuts, etc., within themechanism. All surfaces should be checkedfor evidence of excessive wear or damage.Lubricate the entire mechanism as listedunder LUBRICATION and check the oper-ation for binding or excessive friction.

Upon completing the Inspection, checkall mechanism adjustments and clearancesas listed under ADJUSTMENTS.

LINKAGE

All bearing surfaces of the toggle link-age and springs should be lubricated withD50H15.

INSULATION CONTACT SURFACESThe surface of the Self-X insulation

should be kept clean and unmarred toprevent moisture absorption. Smoke ordust collected between Inspection periodsshould be wiped off with a clean dry clothand if dampness is apparent, heaters shouldbe Installed to insure dryness.

LUBRICATION

Apply a thin film of G.E. lubricantD50H47 to all silvered contact surfaces.Before applying new . grease to the con-tacts, remove any old grease that may bepresent with a clean, dry cloth. A thinfilm of D50H47 should also be applied tothe contact surfaces between the primaryand auxiliary blade assembly wheneverdisassembly is necessary. Also apply athin film of D50H47 to the ground shoe andprimary disconnect studs.NOTE: DO NOT APPLY LUBRICANT TOTHE ARCING CONTACTS.

INSPECTION

The frequency of the inspection andmaintenance schedule is dependent uponthe individual application and will differon various installations. Operating exper-ience gained after a short time will be ofgreat help in determining this schedule.The following instructions list the mainpoints to be included In an inspection anda few general recommendations.CONTACTS

With the switch in the open position,the arcing tip should be examined care-fully for smoothness. If rough spots arepresent due to arcing, they can besmoothedoff by the use of a finefile and crocus cloth.NOTE: Do not remove more metal from thetip than is necessary.

Also, examine the primary fingers andblades for burns or pits,burns are present the contacts should bereplaced.

After completing inspection of the con--tacts, check all contact adjustments andclearances as listed under ADJUSTMENTS.

In order to maintain reliable opera-tion, it 16 Important that the switch as-sembly be properly lubricated at all times.During assembly at the factory, all bear-ing surfaces, and all other parts of theswitch and mechanism subject to wearhave been properly lubricated using thefinest grade of lubricants available. How-ever, even the finest oils and greaseshave a tendency to oxidize with age, asevidenced by hardening and darkening incolor. Elimination of the hardened lub-ricant is essential for proper operation.Also frequent operation of the device causesthe lubricant to be forced out from be-tween the bearing surfaces. A simplelubrication will often clear up minor dis-turbances which might be mistaken formore serious trouble.

GROUND SURFACES

Apply a thin film of G. E. lubricantD50H15 to all cams, latches and rollers.Before applying new grease, wipe off allold grease that may be present.SLEEVE BEARINGS

During periodic inspections apply afew drops of light macnine oil SAE-20or 30 to all sleeve bearings within theswitch and mechanism. During a majoroverhaul or whenever it becomes neces-sary to replace parts, remove all pinsand apply a thin film of D50H15 afterfirst removing all old grease.

If excessive

* A definite lubrication schedule shouldbe set up taking into consideration thefreauencv of operation of the switch and

13




1. Nozzle2. Booster Cylinder3. Piston4. Hinge Pin5. Pin6. Spring7. Pin8. Arc Chute9. Connection Bolt

10. Arcing Tip11. Rivets12. Blowout Coil13. Core14. Pin15. Upper Arc Runner16. Trip Roller17- Trip Latch18- Lower Arc Runner

CO

CMOoo

inCM

d>Ll-

1. Nozzle2- Primary Blade3. Trip Roller4. Arc Chute5. Arcing Tip6. Blowout Coil7. Contact Fingers8. Upper Arc Runner9. Trip Latch

CM00

3-CMOCO

V, >. cOv •• CM

Ol

u_

Cross Section of Interrupter Switch Shown In Open Position

14




few drops of light machine oil SAE-20 or to remove all old grease. DO NOT USE30 to all needle bearings in the mechanism. CARBON-TETRACHLORIDE. If the greaseWhenever it becomes necessary to replace is badly oxidized it may be necessary toparts or during a major overhaul it is use alcohol to remove it. After the bear-recommended that the bearings be removed, ings have been thoroughly cleaned, spinthoroughly cleaned and repacked with them in clean light machine oil to removeD50H15. Care should be taken in removing all cleaner or solvent. Allow the oil toand replacing the bearings so that the drain and immediately repack with G.E.needles are not damaged. A petroleum Lubricant D50H15 being sure all metalsolvent or similar cleaner should be used parts are greased.

BOOSTER CYLINDER

Apply a thin film of D50H15 to theinner surface of the booster cylinder. Donot apply excessive grease as this tendsto clog the nozzle.NEEDLE BEARINGS

During periodic inspections apply a

REPLACEMENT OF PARTSchute may b6 accomplished by removalof assembly bolts (8) and core bolt (9).

When reassembling the arc chute, careshould be taken to insure that the finsof the arc chute sides are equally spacedthroughout their length. Care should alsobe taken when bolting the arc chute sup-ports in place that the trip latches areopposite each other to obtain proper trip-ping of the auxiliary blade,mounting the arc chute, check all adjust-ments as outlined under ADJUSTMENTS.

The following information covers thedetailed assembly instruction for the re-moval of various parts of switch assemblyin order to make necessary repairs orreplacements. This section Includes onlythose parts that during the life of theswitch are most subject to damage or wear.

DO NOT WORK ON THE SWITCH OROPERATING MECHANISM UNLESS THEOPERATINGSPRINGS HAVE BEEN BLOCK-ED (See " To Block Springs").NOTE: Upon completion of any assemblywork on the switch or mechanism, all ad-justments and clearances must be checkedas listed under ADJUSTMENTS.

follows:

1. Open the switch.2. Remove pin (5) releasing the main

spring pressure.3. Remove pin (7) connecting the piston

to the primary blade. Theauxiliaryblade can now be rotated relativeto the primary blade towards aclosed position.

4. Remove the two toggle springs (6).5. Remove the trip rollers (16) and

slide the pin from the toggle link.6. Remove piston.Reassemble in the reverse order plac-

ing a thin film of grease on the inner sur-face of the cylinder as stated under LUB-RICATION. Check for proper air pressureas described under ADJUSTMENTS.

After re-

PRIMARY DISCONNECT STUDS(Refer to Fig. 3)

Removal of either the upper primarystuds (3) or lower primary studs is easilyaccomplished by removing the 3/8" boltsmounting the studs to the insulators. Whenremoving the upper stud, the rear fuseclip (2) is also removed. When reassem-bling, make certain that the fuse clip Iscorrectly aligned.

Removal of the lower stud, removesthe hinge block. When reassembling thelower studs, check that the primary bladesare aligned correctly.

BLADE ASSEMBLY

To remove the primary bladeassembly,proceed as follows:

1. Open the switch.2. Remove the assembly bolts that

attach the operating rod to themechanical crank.

3. Remove the cotter pins, nuts andspring washers from the ninge stud.

4. Remove hinge stud allowing thecomplete blade assembly to be re-moved.

ARCING TIP(Refer to Fig. 25)

To remove the arcing tip (10) fromthe auxiliary blade, proceed as follows:

1. Remove the auxiliary blade assem-sembly as previously described.

2. Remove the rivets (11) from thebase of the arcing tip. With therivets removed, the arcing tip canbe removed.

IMPORTANT: DO NOT REMOVE ALLThe studs haveSIX STUDS AT ONCE,

been carefully aligned with the frame dur-ing assembly at the factory, and It isimportant that this alignment be main-tained to facilitate installation of theswitchin the stationary housing. It i9 thereforerecommended that they be removed andreassembled one at a time. Also, beforeremoving any one stud, measure the dis-tance from that particular one to adjacentstuds in both directions, so that it may bereinstalled in the same location.

Reassemble in the reverseorder check*ing that set screws are tight after correcthinge pressure is obtained,the section on LUBRICATION before re-assembly. Recheck all blade adjustments.

Refer to

A new arcing tip can be Installed byre-riveting in place.AUXILIARY BLADE ASSEMBLY

(Refer to Fig. 25)To remove the auxiliary blade as-sembly, proceed as follows:

1. Open the switch.2. Remove pin (5), and release main

spring pressure.3. Remove pin (7), connecting the pis-ton to the primary blade.4. Remove hinge pin (4), allowing the

auxiliary blade to be removed.The same method of disassembly

should be followed when removing theauxiliary blade after first removing thecomplete blade assembly from the switch.Reassemble in the reverse order referringto the section on LUBRICATION. Recheckall adjustments pertaining to the auxiliaryblade.

NOTE: When replacing the arcing tip, itshould lean slightly toward the nozzle inthe cylinder so that the nozzle is directedat the tip.

INSULATORSRemoval of insulators (4) Fig. 3, is

easily accomplished by removing the mount-ing bolts located within the Insulator sup-ports (16). The bolt9 for the centerinsulator on the 13.8 kv switch are acces-sible usingastandard socket wrench throughthe cutout in the insulator support, thewrench may be positioned by insertingthrough the cutout from inside the sup-port. When removing an insulator, thecorresponding primary disconnect stud isalso removed; therefore only one insulatorshould be removed at a time. Refer tothe section on the removal of the PRIMARYDISCONNECT STUDS before removing theinsulators.

Care should be taken when reassem-bling the insulators that the primary studs,hinge block and rear fuse clip are cor-rectly aligned. After replacing the lowerinsulators check all primary blade adjust-ments as listed under INSTALLATION,ADJUSTMENTS.

BOOSTER CYLINDER(Refer to Fig. 25)

To remove the booster cylinder, theauxiliary blade must first be removed aspreviously described,the riveted ends of pin (14). Under thiscondition, the legs of the auxiliary bladecan be spread for removal of the cylinder.Reassembly can be accomplished by re-placement of pin (14) and re-riveting.When replacing the cylinder, apply a thinfilm of grease as stated under LUBRICA-TION.

Grind or file off

ARC CHUTE ASSEMBLY(Refer to Fig. 7)

The arc chute (6) can be removedfrom the switch by removing the mountingbolts (7). Further disassembly of the arc

PISTON(Refer to Fig. 25)

To remove the piston, proceed as

15



GEl-77040 SE-10 Fused Load-Break Switch

BUSHINGTo remove the through bushing, pro-

ceed as follows:

14 Open the switch.2. Remove the arc chute assembly

by removing the mounting bolts.3. Remove the front fuse clip.4. Loosen the 1" nut allowing the

switch contact block and stud as-sembly to be withdrawn from thebushing.

5. Removal of the bushing mountingbolts allows the bushing to be liftedfrom the switch assembly.

Reassemble in the reverse order tak-ing care that the switch contacts, arcchute and fuse clips are correctly aligned.

Review all switch adjustments and clear-ances. cam. Remove cable cam by removingcotter pins. To assemble, reverse theabove procedure and be sure to exercisecare and operate the complete linkagebefore attaching the operating springcable.

OPENING DASHPOT(Refer to Fig. 22)

To remove the opening dashpot, re-move links (2) near side and far side byfirst removing cotter pins (3), and slidingpin (4) and washers out of the assembly.Remove nut and washer (1) and (5). Thecomplete dashpot assembly will then dropout as a unit. To completely disassembledash pot, remove three set screws (6),and remove Top Cap. Empty cylihder ofoil. To assemble, first add 1.1 oz. ofSlltcon oil 5F96(50) and reverse the aboveprocedure. Refer to Opening Dashpotadjustment after the assembly of the cylin-der is made.

MECHANISM

To disassemble the mechanism, firstblock the operating spring and remove\hecable attached to the cable cam. In somemanner mark the relationship between theslot In shaft (9) Fig. 2C, so that theproper relationship may be made duringthe reassembly. Remove the front cover.Remove the coupling attached to the driveshaft, by knocking out one pin. Removethe complete mechanism frame assemblyfrom the R/O truck assembly by removingbolts (17) Fig. 3. Disassemble the springhousing assembly by removing three nuts(18) Ftg. 3. To remove the main link-age assembly, knock out pin (7) Fig. 2C,and slide out shaft (9). Remove pins(4) and (13) and shafts (14) and (15), toremove canoe and boomerang and cable

RENEWAL PARTSIt is recommended that sufficient re-

newal parts be carred In stock to en-able the prompt replacement of any worn,broken, or damaged parts. A stock of

time and expense. When continuous oper-ation is a primary consideration, morerenewal parts should be carried, theamount depending upon the severity of

such parts minimizes service interrup- the service and the time required tosecuretions caused by breakdowns, and saves replacements.

Renewal parts which are furnished !may not be Identical to the original parts,since Improvements are made from timeto time. The parts which are furnish-ed, however, will be Interchangeable.

NOTE: The listed terms "right" and "left11 apply when facing the front of the switch.ORDERING INSTRUCTIONS

1. ALWAYS SPECIFY THE COMPLETE NAMEPLATE DATA OF THE SWITCH.2. SPECIFY THE QUANTITY, CATALOG NUMBER (IF LISTED), REFERENCE NUMBER (IF LISTED),

AND DESCRIPTION OF EACH PART ORDERED, AND THIS BULLETIN NUMBER.3. STANDARD HARDWARE, SUCH AS SCREWS, BOLTS, NUTS, WASHERS, ETC., IS NOT LISTED IN

THIS BULLETIN. SUCH ITEMS SHOULD BE PURCHASED LOCALLY.4. FOR PRICES, REFER TO THE NEAREST OFFICE OF THE GENERAL ELECTRIC COMPANY.

PARTS RECOMMENDED FOR NORMAL MAINTENANCE

In the tabulation below are listed the parts of the switch which are usually recommended for stockfor normal maintenance.

CAT. NO. NO. PER DESCRIPTION

828C853 G-5 3 Primary Blade Assembly

Auxiliary Blade Assembly (Inc. Arc Horn & Cylinder)

Contact Finger

Arc Chute Assembly

Piston Assembly

634D318 G-5 3121A7458 P-1 24634D317 G-l 3

634D318 G-4 3

GENERAL ELECTRIC COMPANY, PHILADELPHIA, PA.9-62



fused load-break switch

Documents