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ELECTROL

SPECIALTIES COMPANY

~wd .... ~OO~i~i'''<--~C/4

DESIGNERS AND MAN~A~URERS OF

CUSTOM BUILT ELECTRICAL CONTROLS

AND ASSOCIATED ENCLOSURES

441 Clark St.

So. Beloit, III. 61080 (815) 389-2291

TECHNICAL MANUAL

SHIP SERVICE GENERATOR SWITCHBOARD

T-ATF 166-169

CONTRACT NO. N00024-76-C-2044

ELECTROL SPECIALTIES COMPANY

441 CLARK STREET :'

SOUTH BELOIT, ILLINOIS 61080

JOB 287E28

MODEL CB376

1977 I

I a-I I r I I

APPROVAL DATA

NAVSEA NO. ________ _

TITLE OF MANUAL

SHIP SERVICE GENERATOR SWITCHBOARD

CONTRACT

NUMBER

N00024-76-C-2044

REMARKS:

CERTIFICATION:

APPROVAL AUTHORITY:

VESSELS

APPLICABLE

T-ATF

166-169

QTY. OF

MANUALS

QTY. OF BUILDING

. EQUIP. SHIPYARD

4 MARINETTE MARINE CORP.

MARINETTE, WISCONSIN

DATE: ________________ _

IT IS HEREBY CERTIFIED THAT MANUALS PROVIDED UNDER CONTRACT

N00024-76-C-2044 HAVE BEEN APPROVED BY THE APPROVAL DATA

SHOWN ABOVE.

a-2

MANUFACTURER'S SIGNATURE

ELECTROL SPECIALTIES COMPANY

441 CLARK STREET

SOUTH BELOIT, IL 61080

'. SECTION

i

1-1

1-2

1-3

1-4-

1-5

1-6

1-7

1-8

1-9

1-10

1-11

1-12

1-13

1-14

1-15

2-1

2-2

T-ATF 166-169

TECHNICAL MANUAL INDEX

REFERENCE ,PAGE

Section 1 - General Information ------------- 1

Introduction -------------------------------- 2

AC Voltmeter-Amrneter-Frequency Meter -------- 3

Wattmeter ----------------------------------- 4

Synchroscope -------------------------------- 5

Instrument Descriptive Information ---------- 6

RotarY Switches ----------------------------- 7

Instrument Switches, Descriptive Information 8

Reverse Power Relay - Model CRN-l ----------- 9

Rev. Pwr. Relay - Descriptive Information --- 10

Current & Voltage Relays - Descriptive Infor-mation -------------------------------------- . 11

Temperature Indicator - Descriptive Information 12

Molded Case Circuit Breaker.- Descriptive In-formation ----------------------------------- 13

Ground Detector Lights ---------------------- 14

Voltage Regulator - Descriptive Information - 15

Phase Sequence Indicator -------------------- 16

Control Relays - Descriptive Information ---- 17

Section 2 Installation ------------------

Switchboard Storage -------------------------

Removal From Carrier and Inspection for Dam-age -----------------------------------------a-3

SECTION REFERENCE

• 2-3 Moving and Lifting Switchgear ------------- 19

2-4 Storage Before Installation ----------------- 20

2-5 Equipment Installation ---------------------- 20

2-6 Ground Bus 20

2-7 Installing Activities Wiring And Wire Routing 20

2-8 Adjustments and Tests - General ------------- 21

2-9 Meter Adjustments and Test ------------------ 21

2-10 Indicator Lights---------------------------- 21

2-11 Fuse and Fuseholders ----:------------------- 21

2-12 Getting Ready For Service ------------------- 22

2-13 Operational Testing ------------------------- 22

3 Section 3 - Operating Procedures ------------ '- 23

3-1 General 24

3-2 Principals Of Operation --------------------- 24,25,&26

3-3 Preparation For Starting (Automatic Control)- 27

3-4 Starting, Single Unit, (Automatic) ---------- 27 & 28

3-5 Parallel Operation & Synchronizing ---------- 29 & 30

3-6 Shutting Down A Genrator Operating Non-Par-allel --------------------------------------- 31

3-7 Shutting Down a Generator Operating in Par--allel --------------------------------------- 31

3-8 Shore Power --------------------------------- 32

3-9 Manual Operation of a Generator -------------- 33

3-10 Operation of Bow Thruster Breakers -----~---- 34-

'. a-4

SECTION

.4

4-1

4-2

4-3

4-4

4-5

4-6

4-7

4-·8

4-9

4-10

4-11

4-12

4-13

REFERENCE

Section 4 - Preventative Maintenance and Trouble Shooting ----~-----------------------

General

PAGE

Preventative Maintenance -------------------- 36

Electrical Measuring Instuments ------------- 37

Circuit Breakers ---------------------------- 38

Periodic Inspections and Tests -------------- 38

Corrective Maintenance ---------------------- 38

Short Circuits ----------------------------- 38

Grounds ----------~-------------------------- 39

Loose Connections --------------------------- 39

Open Circuits -------------------------------. 39

Blown Fuses --------------------------------- 39

Indicator Lights ---------------------------- 39

Rotary Switches ----------------------------- 40

TABLE 4 - 1, Periodic Inspection ----------------- 41

Section 5 - Bills of Material--------------- I

Section 6 - Drawings ------------------------

Drawing number CB376L (Sh. 1 & 2 of 2)

CB376WP (Sh. 1, 2, & 3 of 3)

I a-5

SECTION 1 - GENERAL INFORMATION

SWITCHBOARDS

SECTION 1

GENERAL INFORMATION

"DATA SHEETS IN THIS SECTIO~ CONTAIN SEVERAL OR ALL

MODELS OF DEVICES MADE BY THIS MANUFACTURER. THE

OPERATOR SHOULD REFER TO THE BILL OF MATERIAL AND

DRAWINGS TO DETERMINE SPECIFIC PARTS INFORMATION

AND IDENTIFICATION."

I

I I

SECTION 1 - GENERlIL INFORMATION

INTRODUCTION

The Dead-front T-ATF Switchboards have a seven section welded steel frame\'/ork. Steel panels are attached to this structure and used to support and house meters, circuit breakers, switches, indicator lights, rheostats, resistors, fuseholders, etc. The location of the equipment, is such that all com ponents requiring monitoring, adjustment, manual setting, etc., can be operated from the front of the switchboard without opening the hinged or bolted panels. All other components are mounted within the switchboard enclosure. A drip shield c covers the entire assembly.

Nameplates are provided adjacent to each piece of eqUipment on the front panels. All nameplates are etched aluminum with black lettering, as applicable to the component identified:

a) Circuit name and number of equipment.

b) Load amperes and fuse ratings or circuit breaker trip rating. '

The operating handles of all circuit breakers protrude through openings in the front panels so that the breakers may be man ually operated from the front of the switchboard when the front panels are in the closed position. Push buttons are provided to operate motorized breakers.

I i

All bus works are installed in accordance with IEEE #45. The bus assemblies are designed and braced so as to withstand the thermal and magnetic stresses resulting from short circuits.

All bus bar connections are in accordance with IEEE #45.

Phase identification A, B, and C.

is marked on the bus by capital letters

I All wiring between the front hinged panels and the frame work is formed in the shape of a loop to provide more flexibility when opening the panels. Terminal boards are located behind the main generator panels for termination of switchboard wiring and for connection of ship's cabling.

I Fuses are replaceable from the front by opening the hinged doors and all circuits are identified by adjacent nameplates.

" I

, I

SECTION 1 - GENERAL INFORMATION

1-1 AC VOLTMETER, KA-241

AMMETER KA-241

FREQUENCY METER KR3-241

The AC Voltmeters, Ammeters and Frequency meter are Westing house Type 241, 4~ inch square instruments. These meters are designed specifically for control and distribution switch boards. The meter operates on the iron repulsion principle with air damping.

This type of movement utilizes a mechanism that combines the attraction and repulsion principles of operation. A fixed vane and two adjustable vanes of carefully determined con figuration are mounted inside of a field coil which, when energized magnetizes these vanes and moves them on the pivoted shaft.

The fixed vane exerts a force of the taper, or up-scale.

vanes attract the moving iron vane width, or up-scale.

of repulSion in the The upper and lower in the direction of direction adjustable increasing

Tamper Proof:

Accuaracy::

Zero Adjustment:

Standardized:

Specification:

Long Scale:

Suspension:

Studs permanently mounted on case prohibit removal of instruments that are flush mounted.

1% of full scale value.

Zero adjuster is provided on front for quick and easy scale adjustment.

All types and ranges housed in stan dard casing.

All instruments conform to ANSI Stan dards C39.1.

7" Scale facilitates reading, reduces errors. I Taut-Band,Suspension for Hi-Shock ser vice •.

-~----- ........... -~. - ... ~.- _.,,~-:- -c:~ •• "t;- .--.-_, -

SECTION 1 - GENERAL INFORMATION

1-2 WATTMETER

The Wattmeters are Westinghouse Electric Corp., Type KP-241, 4~ inch square, instruments. These meters are designed specifially for control and distribution switchboards.

The meter incorporates the use of the "Hall" generator watt transducer. A "Hall" crystal is mounted in the air gap of an electromagnet with a current circuit supplying the energy to the electromagnet and a potential circuit connected to two opposite sides of the "Hall" crystal. Output of the ele ment is derived from the two sides of the crystal at right angles to the potential input. This output is pulsating D-C which is measured by a conventional permanent-magnet, moving coil instrument mechanism.

Tamper Proof: .

Accuracy:

Zero Adjustment:

Standardized:

Specification:

Long Scale:

Suspension:

Studs permanently mounted on case.

prohibit removal of instruments that are flush mounted.

1% of full scale value.

Zero adjuster is provided on front for quick and easy scale adjustment.

All types' and ranges housed in stand ard casing.

All instruments conform to ANSI Stand ards C39.l.

,7" Scale facilitates reading, reduces errors.

Taut-Band Suspension for Hi-Shock ser vice •

SECTION 1 - GENERAL INFORMATION

1-3 SYNCHROSCOPE

The synchroscope is a Westinghouse Electric Corp. KI-241, indicating instrument. The instrument consists of a stand ard 2-phase winding that is connected in conjunction with a moving i~on clement which has an independent exciting coil.

The 2-phase winding is connected to one phase of .the incoming machine through a phase-splitting network which produces a rotating field. The exciting coil is connected to the cor responding phase of the running machine, and the moving vanes are thus polarized by the resulting field. The action of these two fields is such that the vane will indicate the phase difference. Thus sunchronism is indicated when the instument pointer is stationary and on the scale index.

Tamper Proof:

Accuracy:

Zero Adjustment:

Standardized:

Specification:

Long Scale:

Studs permanently mounted on case prohibit removal of instruments that are flush mounted.

1% of full scale value.

Zero adjuster is provided on front for quick and easy scale adjustment.

All types and ranges housed in stand ard casing.

All instruments conform to ANSI Stand ards C39.1 7" Scale facilitates reading, reduces errors •

SECI'ION 1 - GENERAL INFORMATION

1-4 INSTRUMENT DESCRIPTIVE INFORMATION

Westinghouse

CI

Application The Type K-241 instruments have been designed to achieve the ultimate in reli ability and performance. They are relatively expensive, reflecting the cost of that achievement. Instruments of this class are recommended for use on electric utility switchboards and control panels for similar industrial service.

Selection of the Type K-241 instruments is indicated whenever there is a need for fre quent accurate, quick readings and where failure in an instrument circuit could affect an associated critical circuit. This is usually the case where current and potential transformers or transducers are shared with devices having protective or control functions.

Standards The Type K-241 instruments comply with ANSI Standards C39.1 for 1 % class switchboard instruments. I n such areas as relate to shock, vibration, friction, repeat ebility and electrical losses most K-241 types will exceed these specifications, be cause of the improvements inherent in the unique Westinghouse taut-band design.

Features Taut- Band Suspension All Type K-241 instruments, except those which may rotate continuously, use the Westinghouse-perfected taut-band suspen sion. Instruments incorporating this feature are identified by the trademark "t/Id.®. This suspension is a commercial adaptation of the one developed by Westinghouse for Navy HI-Shock service. The taut-band suspension instrument has certain unique advantages over the conventional pivot and jewel types:

1. It eliminates friction, giving better accu racy and almost perfect repeatability.

2. It gives top performance under adverse conditions of shock and vibration.

3. It permits mounting on apparatus with out fear of damage in shipment.

4. It reduces maintenance, thereby saving money throughout the lifetime of the instrument.

5. It assures longer life, reducing annual depreciation and replacement costs.

6. It has greater sensitivity, reducing pow er burdens on circuits being measured.

KA-241 Ac Voltmeter

43-240 0 WE A Page 1 Descriptive Bulletin

Ac and Dc 2500

Circular Scale Switchboard Instruments Featuring "t/Id.® Mechanisms

4Y..-lnch Rectangular Type K-241, For Commercial Service

=- 1000 ( "

- 500...1 -;i('i 3000

.; k( VOLTs '"

10(-241 Dc Ammeter

Mechanisms Type K-241 instruments are built with per manent-magnet moving-coil mechanisms for all direct current and rectifier types, as well as for those employing self-contained or external transducers. For the direct measurement of alternating current the mechanisms combine the attraction and repulsion iron-vane principles. Both types are built with taut-band suspensions. The power factor meter and the synchroscope are of the rotating vane type with pivot and jewel bearings.

Full View Design To facilitate quick, accurate reading, even under adverse conditions, all K-241 instru ments feature the Westinghouse "full view" design. The glass is flat, reducing light reflection to minimize the need for non-glare glass. The dial scale is beveled so that there is no dial shadow, making it possible to read the instrument from a 60-degree angle.

High Overload Capacity While the exact overload capacities vary with ratings, the K-241 instruments gen erally will withstand momentary overloads in excess of industry standards without sustaining damage. For ac instruments this overload capacity is in excess of 35 times normal current and" for dc it is in excess of 1 50 times. Therefore, it is permissible to select instruments to read at a preferred three-quarters scale at normal current and yet permit "pegging" the instrument dur ing high-current transient conditions.

Styling The K-241 instruments match other West inghouse switchboard components in ap pearance.

April,1976 Supersedes DB 43-240 dated March, 1972

E, C/2036/DB

43-240 D WE A Page 2 Descriptive Bulletin

Ac and Dc 2500

Circular Scale Switchboard Instruments Featuring "tb.t.® Mechanisms

4%-lnch Rectangular Type K-241. For Commercial Service

Outline Dimensions and Drilling Plan (In Inches). See Application Data 43-200

.687 t-----4~ (11.2)--~ (1.7) 1----jJ---+2 I.e) (Max.)

Drilling Plan ry.-=-----:=~--='i--rnl!!~---..,_.....j .190-32 (JD-32)

Except 30-50 Amps are! - 28 Thread

,ice) Diameter (Foorl Holes for PanelsUPta~ (.6) Inch Thick (4.3)

~(1.l)Diameter (Faur) Hoiesfor -L-±t7-~=:b.-L Panels ~ (.7) to 2~ (6.4) Inches (Cm) Thick

J] ~J. .'8f"Hjjij@~~l~ Assembly for Panels from ;(.7)t02~ (6.4) ThICk II' U l-r (Extensoan Stud Style Number 22BI054G3J1 r-- 2~ (7.0) ---l 8-32 Thread

Type

KX·241

KC-241

Instrument Dimension A

Dc Instruments .................. 2.813 7.1 Rectifier Instruments. Except Trans-ducerType. ······· ••........... 2.813 7.1 Ac Voltmeters and Ammeters ....•.. 3.750 9.5 Transformer Type Rectifier Ammeter .3.750 9.5

Note 1 - Potentiometer for factory adjustment of 150, 300 and 600 V ae voltmeters.

Note 2 - Tubular resistor on single phase 50 and 60 Hz synchroscopes and power factor meters.

KA-241

KC-241

KR3-241

KX-241

KI-241

KI-241

KP-241

KV-241

KJ-241

Frequency Meter. ................ 3.750 9.5 Electrical Resistance Thermometer ... 3.750 9.5 Synchroscope. Single Phase ........ 5.312 13.5

Note 3 - Resistor cage used with 400 Hz synchroscopes and power factor meters. POwer Factor Meters... . .... 5.312 13.5 Wattmeters ..................... 5.312 13.5 Varmeters .........•...........• 5.312 13.5 Power Factor Meters ...•......... 5.312 13.5

Types Available Function

Dc Microammeter Dc Milliammeter Dc Ammeter Dc Millivoltmeter Dc Voltmeter

Ac Milliammeter Ac Ammeter Ac Voltmeter Ac Frequency Meter Ac Power Factor Meter Ac Power Factor Meter Ac Synchroscope Ac Wattmeter Ac Varmeter Ac Varmeter

Rectifier Milliammeter Rectifier Ammeter Rectifier Voltmeter Resistance Thermometer

Speed Indicator Synchrotie

Specifications Accuracy:

Ranges

50uA to 1 rnA lmA to lA lA 10 50A

50mV to lV lV to 800V lOrnA to lA lA to LOA

10V 10 600V 50, 60 and 400 Hz 0-1-0 .5-1-.5

.1 to lOA

.1 to lOA

.1 to lOA

1 to 100rnA l00mA to 17A 5V to 600V 0-100, 200'C

0-25. 13.000 pulses 0-360'

1 % accuracy class. See AD 43-200 for accuracy of specific instruments. -

Case Size:

4%-inch class (4'% .. inches (11.2 cm) square).

Insulation Rating:

800 V.

Shielding:

Dc -1 % influence at 50-200 gauss.

Ac -1 % influence at 15 gauss.

Type Designation

KX-241

KX-241

KX-241

KX-241

KX-241

KA·241

KA-241

KA-241

KR3-241

KI-241

KJ-241

KI-241

KP-241

KP-241

KV-241

KC-241

KC-241

KC-241

KX-241

KR-241

KS-241

Scale Length:

Mechanism permanent-magnet moving-coil permanent-magnet moving-coil permanent-magnet moving-coil permanent-magnet moving-coil permanent-magnet moving-coil attraction-repulsion iron-vane attraction-repulsion iron-vane attraction-repulsion iron-vane self-contained transducer rotating vane self-contained transducer rotating vane self-contained transducer with separate phase shifter self-contained phase shifter permanent-magnet moving-coil permanent-magnet moving-coil permanent-magnet moving-COil permanent-magnet moving-coil self-contained transducer self-synchronous

7.1 inches (18.0 cm) for 250· rotation.

Net Weight:

3 to 5 pounds (1.4 to 2.2 kg). exclusive of accessories.

Ac Burdens:

5A ac ammeter - .375 VA Ac wattmeter- 2.0 VA (current coil) Ac wattmeter - 2.5 W (potential coil) 1 50V ac voltmeter - 2.4 W

For details. see Application Data 43-200.

Westinghouse Electric Corporation Relay-Instrument Division. Newark, N. J. 07101 Printed in USA

Mod ifications Dials:

Black with white marking Electroluminescent Fluorescent Dual scale Special colors. trademarks. legends. etc.

Windows:

Non-glare Shatterproof

Electrical:

Intermediate ratings Special calibrations Offset or suppressed zero Multiple rating Special sensitivitY

Mechanical:

Memory device to hold readings Pusher or index pointers Weatherproof HI-Shock (For MIL-M-16034A. MIL-

S-901 B, see DB 43-241)

Many additional modifications are avail able on speCial negotiation.

Wiring Diagrams See Application Data 43-200

Further Information Ordering Information. Ratings. Prices:

PL 43-200

Instructions: IL 43-241 Renewal Parts: RPD 43-241

NOV j 197~

INSTALLATION •

Westinghouse I.L. 43-241W

OPERATION • MAINTENANCE

IN S T Rue T ION S 'WI -- - K-241 LINE -

SWITCHBOARD INSTRUMENTS

FOUR AND ONE-HALF INCH CLASSIFICATION

FULL-VIEW CIRCULAR SCALE TYPE

GENERAL

Type K:261'instruments are designed and built to meet or exceed the requirements of American Standard C39.1 for electrical indicating switchboard instruments. The rated accuracy class is one per cent.

CASES

The first letter in the Type designation indicates the form

Drill panels and connect instruments according to the diagrams in this leaflet, or according to switchboard drawings if instruments are supplied as part of a switchboard.

Before energizing the instrument, adjust the pointer to zero by means of the zero adjuster at the front of the instrument.

of case used. K = Rectangular Rush Case, Range mounted. CIRCUIT PRECAUTIONS

II

MECHANISMS CAUTION: DO NOT REMO~E C<;>VER WHILE THE

INSTRUMENT IS ENERGIZE/D. DIAl L AND POINTER

The second letter in the type designation indicates the

Pri",;P~ :' £:;:'E'A~':;:~:"~~"!;:;;:"" MA Y: T HAZAR7NOl.T AGE LEVHS.

P = Watt transducer plus X HIGH VOLTAGE OPERATION

/ \ -; / I

I = Rotating iron v~e A All instrument7/are insulated for 800 volt maximum

C = Rectifier plus rX . se?,-ic""1 1/ j..~.

F = Iron core electromagnetic I ' ~ .)

J = Power Factorl Transduc'er-P1us X When voltmeters are used with external resistors on V V T d PI X I I h' h 'h h' ll' /./.' f "h..-'"" = ar rans ucer us vo tages Ig er/t an t e msu atlOwratmg"o"t e Instrument, ) I /_ / ~ -- All of the above_mechanisms employ the taut band one termin al of the instrument should be grounded .

. b'~ rh I ) / ~ suspensIOn earlng system except tel and F types. / ~

~ ~ I ) fmmeters with external shunts must be used with leads CA UTlON: When-the instrument mechanism is/exposed. having,(he resista~&specified in the dial notes. If the circuit

'd I ~. h hi. I. Th /. \ / I / d h' la' . f h . h avol contact Wll t e tensIOn sprmgs. es~sp"ngs are \......--vo tage excee s t e InSU tlOn rating 0 t e Instrument, t e precise1f" made and positioned. and any pressureslii.adver- sh,{nt should be in the grounded side of the line.

tent y app Ie to t em may cause mlsa Ignment OFt e movmg I I · d h I .I I' I ,r "h \ ~ element. l V / GROUNDING OF CASES

/ / Ground instrument cases with No. 12 A WG Copper Wire DIAL NOTES / to anyone of the three instrument case to base screws.

References to type, style number, use of external components if required, coii'?atings-:Calibration data etc., are made on the dial mask.

INSTALLATION

Unpack instruments carefully. Terminal and mounting hardware, and any external components may be in separate packages.

REPAIRS AND RENEWAL PARTS

Repair work can be done most satisfactorily at the factory, or at any authorized Instrument Repair Facility (see Service Directory 43-{)00). However, interchangeable parts can be furnish'ed to the customers who are equipped for doing repair work. When ordering parts always give complete nameplate data.

These instructions neither cover all details or variations in equipment nor provide for all contingencies with regard to installation, operation or maintenance. On request, Westinghouse will be glad to supply further i"nformation as to particular problems or questions which are not covered sufficiently for the purchaser's needs.

SUPERSEDES tL. 43-241V, dated August 1975 o Changed since previous I .. ue EFFECTIVE OCTOBER 1976

N

.n ~.:_2.J..LK~.:2:1~. _ •.. X;,~":ET~R_.?II~l~ ~ILASE _____ .• __ .

3<1 .'5f 2-231 I(P2-~'11 1':ClC~,TII:Si Vt:.fl'lJIMJSOVC!::!3 __ ~I~:GL~ PIIASE

3~ 1:.J_'?o3) ~J:.2::.! __ TrUJ:SO~C()9: yy.f!.E P.f. METE,R I PI'!. c.,_~_~It_

36 KX-241 FREOUENCY METER MIL-M-16125

* . USED ABOVE GOO VOLTS

4.422 tIlZ.3M'"

.281 TO 2.500

171Mt.41 16~.5M"'1

3',5-6-1

3-5-~:Ll! .1'2 _____ -1 _.1-2-9- 19' ______ ---1

'·0 o Fig. 1.

TERI'IN .... L P051TIONS

PER TABLE

NOT USED 5·1

FOR GROUNDING

CONNECTIONS, us!

ANY IOF3

USED

1m USED

NOT USED

IISED

ooT VSEO

__ ~T usee

NOT USED

USED

~T_.':SE.Q

f--..

useD f'.K)T USED

NOT USED

Ill:)T USED

USED

NOT USED

useD

VA-B2S

-875

VV2·87G

0 ... USF.D

lie 841

.313 DIA (7. 9MM}(4 HOLES) FOR PANELS UP TO.25O THK.(6.4MM)

SUB. 39

409C619 m n

IJI

o ;Ill o

VI

;Ill c:

i:

m

VI

K-241 LINE SWITCHBOARD INSTRUMENTS

186A291

Tr __ ,,"", 10·"_ .~O .. fHJ't

,;/Zr"I.D't."J:. ""

, ."".,,,,, "llLts LIn_ IN c' ... 'lilt .. L11I DlP' ""'"00010' ........ _·, Ie'I( .. OOT~_ .. O.

16C5805 408C350 Fig. 2. Transducar usad with HI Shock

Fraquancy Matar.

Fig. 3. VR-825 Extarnal Ras/stor. o Fig. 4. Phasa Shifting Transformar usad with 3-phasa, 3-wlra and 3-phasa 4-wlra Varmatar.

o Fig. 5. VAR Compansator usad with Singia Phasa Varmatar.

REAR VIEW

120V

RANGES

240V

RANGES

837A406

Fig. 7. Typa KR3-241 Salf Cant. Fra quancy Matar.

~ ~ ~J 1- SECTION 2-$£CTlOH

~ :Jf 'J 0, . , CENTER TAPPED 3- SECTION

3515All o Fig. 6. Typa VR825 Raslstor Connac tlons.

REAR VIEW

1805481

Fig. 8. Typa KX-241 Ammatar and Milliamatar (salf-contalnad).

K-241 LINE SWITCHBOARD IHSTRUMENTS ____________________ _

REAR VIEW

18O!i082

Fig. 9. Type KX-241 Ammeter with Edemel Shunt.

REAR VIEW

z

FOR C-241

TERM NOS

AM 3-e

1805467

REAR VIEW

1805483

Fig. 10. Type KX -241 Voltmeter.

REAR VIEW

FOR C-241

TERM HOS

ARE 3-15

18OM68

Fig. 11. Type KA-241 and KC-241 Ammeter.

REAR VIEW

LIME METOI

lasA708

Fig. 12. Type KA-241 and KC-241 Voltmeter.

Fig. 13. Type KX-241 Frequency Meter, HI· Shock, with Edemal Transducer.

REAR VIEW

11054n

Fig. 14. Type KP-241 Single Phase WaHmeter.

REAR VIEW

1805475

Fig. 15. Type KP-241 2 Current Call WaHmeter.

REAR VIEW

N • 2 I

SL

11 t 1 r" • ~ ..

~~ f~

11105478

Fig. 16. Type KP-241 3 Current Coil WaHmeter.

K·241 LINE SWITCHBOARD INSTRUMENTS _____________________ _

REAR VIEW

TYPE MV 832

PHASE SHifTING

> 2 I ~ ROTATIQHI-2.a TRANSFORMER\

5~ ,~ .. \., ~J:: :)

~ '-11 ~- f--

VAR .. ETERSWILL Dl- FLEeT TO TH! RieHl fOIl:

LAOIIMO VUI now

1805455 o Fig. 17. Type KP·241 2 Current Call Varmeter with phase shifter.

REAR VIEW

1805485

Fig. 20. Type KI·241 3 Phase·3 Wire Power Factor Meter.

REAR VIEW

186A373

Fig. 23. Type KP2·241 Indicating WaN Transducer Single Phase.

REAR VIEW

'" J 2 1

VARl«TEFIIJ 'I'I.!.

~~O~Q I 'AU! n.ow , (NUMIl£RfO THIoIII0.1.S Of; INSTIIJIoIENT ~PPLl ro Tm: i'J'-HI ON..Y)

18D5459 .

o Fig. 18. Type KP·241 3 Current Coil Varmeter with phase shifter.

REAR VIEW

2 I

U_

185A917

Fig. 21. Type KI·241 Synchroscope.

REAR VIEW

• 2 I n-':'TIU.I_en IITtIlUL COIL co.t:CTI.1 .T sa-. .....-nn WI LL Df:R.ECT ~ nIf IIIIl Fl. LUI ... YU Fl.OW

186A374

Fig. 24. Type KP2·241 Indicating WaN Transducer 2 Current Call.

REAR VIEW

1a5A920 o Fig. 19. Type KI·241 and KJ·241 Single Phase Power Factor Meter.

REAR VIEW

220,1991

OFlg.22. Type KP·241 Single Phase Varmeter.

REAR VIEW

fill S 2 I

186A375

Fig. 25. Type KP2·241 Indicating WaN Transducer 3 Current Coil.

K·241 LINE SW1TCHBOARD INSTRUMENTS, ____________________ _

o Fig. 26. Type KP2·241 Indicating VAR Transducer Single Phase.

REAR VIEW

862A987 o Fig. 29. Type KI241 3 Phase 4 Wire Power Factor Meter.

REAlI V'EW

.-om ~"-__ ...J 50!:400 ____ ...J

8_468

Fig. 32. Type KR241 Speed Indicator.

o Fig. 27. Type KP2-241 Indicating VAR Transducer 2 Current Call with phase shllter.

REAlI VIEW

1805481

Fig. 30. Type K P241 Single Element WaNmeter for 3 Phase 3 Wire.

REAR V'EW

878A484

Fig. 33. Type KR4-241 Frequency Meter.

" J 2 1 o Fig. 28.

+OUl'PUT-

187A043

Type KP2-241 Indicating VAR Transducer 3 Current Coli with phase shllter.

REAR VIEW

~o-ru----J

", TflLmt' " I ,1 ~ 1;11 L~ +-~

J " FOR MV DlV1C£

ALTER .... Y

50 TO 400

Hz

I[ URD

878A46l1

Fig. 31. Type KR2-241 Speed Indica tor.

REAR VIEW

1SD5475

Fig. 34. Type KV-241 Two Current Coli Self Contained Varmeter. For single phase test connection see I.L. 43-241.1.

CI

Construction Features

Primary Opening The large primary opening is adequate for bus bar or cable and is particularly suitable for extra turns when required in multiple ratio applications.

Core and Coils The ring type core is assembled within an insulating shell and is toroidally wound with a distributed secondary winding. The whole assembly is then completely enclosed in molded rubber insulation.

Secondary Terminals The secondary terminals are stud type.

Markings Complete identification along with ratings and polarity marker are permanently molded into the body of the transformer.

Mounting The ECI can be flush mounted to panel or platform by means of bolts through any pair of mounting holes provided in the body of the transformer. Steel mounting feet with hardware are also available, as a separate item. to mount the transformer in an upright position with secondary terminals in either a vertical or horizontal plane.

Product Bulletin 44-112 Page 1

Type ECI Current Transformers

600 Volts, Indoor, 10 Kv BIL Primary Amperes: 100 Through 800 25 Through 400 Hertz

Application The Type ECI is a rubbermolded indoor current transformer for use with indicating instru ments for switchboards and other industrial applications. It is not recommended for use where a high degree of accuracy is required.

Ratings ANSI Metering Accuracy (60 Hertz) 100 through 250 Amperes - 1.2 Class for B-O.l

300 through 800 Amperes - 0.6 Class for B-O.l and B-0.2

Continuous Current Rating Factor:

1.33 at 30'C Ambient

1.00 at 55'C Ambient

Selector Guide Primary I Style Numbers Ampere Rating<D

100 237A970GOl 150 237A970G02 200 237A970G03

250 237A970G04 300 237A970G05 400 237A970G06

500 237A970G07 600 237A970G08 800 237A970G09 Note: Mounting feet. when required, must be ordered as a separate item. A complete set for one transformer includes feet. nuts, baits, and washers. They are not furnished assembled on the transformer.

Style Number 447C337G03

Q) Secondary current rating is 5 <Jmperes.

Further Information Prices: Price List 44-020

June 18,1974 Supersedes DB 44-112. dated April. 1970

E. D, C/2046/DB

Product Bulletin 44-112 Page 2

<I Performance Curves

---··~--·~--lr- ---- -~--.

D

'" C ...

o S;

0.. .,.

c V o

40'-~

:~~L __ _ o 10 20 --40

Percent Rated Current

300 through 800 Amperes l~ ~~l;=-_~ a::

C '" 0..

20 40 60 eo Percent Rated Current t <I>

'" C ..

if '" c '0 .. ~,-.

'" ...J

40 60

Percent Rated Current

__ .. _1 100 I~O

(Chango Scalo)

:-l I I

I . J

100 150

(Change Scale)

Dimensions and Weights Identification Morkino

8 Molal-Cal

Nome Plale

2~ , Bolls 4-Totol Mounling Feel

Primary Ampere Rating

Max. Dimensions:

Inches

Approx.

Wt.: Lbs.

A B c Net Ship.

Without Mounting Feet

100 thru I 5'11. 4'~. 2 I 4

With Mounting Feet

100thru 15'''' 4'M. 4"11. 14%

Eel with Mounting Feat Assembled ping

5%

Instructions for Use of Eel as a Variable Ratio Transformer The nameplate rating of the Type ECI current transformer is based on the condition that the primary conductor will be passed once through the transformer opening. The rating can be reduced in even multiples by looping this conductor two or more times through the opening. A transformer having a rating of 200 to 5 amperes will be changed to 50 to 5 amperes if four loops or turns are made with the primary cable as illustrated in Figure 1.

Changes in rating can also be accomplished by means of external turns added to or sub tracted from the secondary winding. Due to the relatively large number of turns in this winding, these changes occur in small steps.

Figure 2 shows how turns may be added to the secondary winding by connecting to the "non-polarity" (X2) terminal stud and wind ing on turns in the direction of the arrow.

Figure 3 shows how turns can be subtracted from the secondary winding by connecting to the "polarity" (Xt) terminal stud and winding on turns in the direction of the arrow.

A frequent application of the window type current transformer is for use with'a 5 amp ammeter in motor load measurements. The same meter can be used for different size motors by making ratio adjustments as de scribed above. The table on page 4 can be used to select the desired ratio and to deter mine the necessary primary and/or second ary turns for converting one of the standard rated transformers to this value.

Calculations for this application are illus trated in the example below:

1. Determine the full load current of the motor, Le., 140 amperes.

2. Determine full scale marking'of meter dial, Le., 0-150%.

3. Determine primary current by multiplying the motor full-load current by the full scale meter marking, then dividing by 100.

Example: 140 X 100 = 210 Amperes

4. Use the table on right to determine the number of primary and secondary turns needed for the particular transformer available.

Example: 200:5 ampere transformer - use 1 -turn primary and add two turns to secondary; 400:5 ampere transformer use two turns primary and add four turns to secondary.

[ Primary Turn 2 Primary Turns

Figure 1

Product Bulletin 44-112 Page 3

Type ECI Current Transformers

600 Volts, Indoor. 10 Kv Bil Primary Amperes: 100 Through 800 25 Through 400 Hertz

4 Primary Turns

1 Primary Turn 2 Primary Turns 4 Primary Turns

Name- Actual Name- Actual Name- Actual plate Ratio plate Ratio plate Ratio Ratio Ratio Ratio

100:5 100:5 100:5 50:5 100:5 25:5 150:5 150:5 150:5 75:5 150:5 37.5:5

200:5 200:5 200:5 100;5 200:5 50:5 300:5 300:5 300:5 150:5 300:5 75:5

400:5 400:5 400:5 200:5 400:5 100;5 500:5 500:5 500:5 250:5 500:5 125:5

600:5 600:5 600:5 300:5 600:5 150:5 800:5 800:5 800:5 400:5 800:5 200:5

Figure 2: "To Add Secondary Turns Figure 3: To Subtract Secondary Turns r---"'To Meter To Meter

Product Bulletin 44-112 Page 4

Type ECI Current Transformers

600 Volts, Indoor. 10 Kv BIL Primary Amperes: 100 Through 800 25 Through 400 Hertz

Table to Determine Needed Number of Primary and Secondary Turns Primary Current IOf Secondary CummI of 5 Am.-es

100/5 150/5 200/5 300/5 400/6 500/6 600/6 RaUo Ratio Ratio Ratio Ratio Ratio Ratio

150 200 250 350 450 550 650 145 195 245 345 446 545 645 140 190 240 340 440 540 640 135 185 235 335 435 535 635 130 180 230 330 430 530 630 125 175 225 325 425 525 625 120 170 220 320 420 520 620 115 165 215 315 415 515 615 110 160 210 310 410 510 610

105 195 205 305 405 505 605 100 150 200 300 400 500 600

95 145 195 295 395 495 595 90 140 190 290 390 490 590 85 135 185 285 385 485 585 80 130 180 280 380 480 580 75 125 175 275 375 475 575 70 120 170 270 370 470 570 65 115 165 265 365 465 565

60 110 160 260 360 460 560 55 105 155 255 355 455 555 50 100 150 250 350 450 650

75 100 125 175 225 275 325

72.6 97.5 122.5 172.5 222.5 212.5 322.5 70 95 120 170 220 270 320

67.5 92.5 117.6 167.5 217.5 267.6 317.5 65 90 115 165 215 265 315

62.5 87.5 112.5 162.5 212.5 262.5 312.5 60 85 110 160 210 260 310

57.6 82.5 107.5 157.5 207.5 257.5 307.6 55 80 105 165 205 255 305

52.6 77.5 102.5 152.5 202.5 252.5 302.5 50 75 100 150 200 250 300

47.5 72.6 97.5 147.5 197.5 247.5 297.5 45 70 95 145 195 245 295

42.5 67.5 92.5 142.5 192.5 242.5 292.5 40 65 90 140 190 240 290

37.5 62.5 87.6 137.5 187.5 237.5 287.5 35 60 85 135 185 235 286

32.6 57.5 82.5 132.6 182.5 232.5 282.5

30 95 80 130 180 230 280

27.5 52.6 77.5 127.5 177.5 227.5 277.5 25 50 75 125 175 225 275

50 56.7 83.3 116.7 150 183.3 216.7

48.3 65 81.7 115 148.3 181.7 215

48.7 63.3 80 113.3 146.7 180 213.3 45 61.7 78.3 111.7 145 178.3 211.7

43.3 60 76.7 110 143.3 176.7 210

41.7 58.3 75 108.3 141.7 175 208.3 40 56.7 73.3 106.7 140 173.3 206.7

38.3 95 71.7 105 138.3 171.7 205

36.7 53.3 70 103.3 136.7 170 203.3

35 51.7 68.3 101.7 135 168.3 201.7

33.3 50 66.7 100 133.3 166.7 200

31.7 48.3 65 98.3 131.7 165 198.3 30 46.7 63.3 96.7 130 163.3 196.7

28.3 45 61.7 95 128.3 161.7 195

28.7 43.3 60 93.3 126.7 160 193.3 25 41.7 58.3 91.7 125 158.3 191.7

23.3 40 58.7 90 123.3 156.7 190

21.7 38.3 95 88.3 121.7 155 188.3

20 36.7 53.3 86.7 120 153.3 186.7

18.3 35 51.7 85 118.3 151.7 185

16.7 33.3 50 83.3 116.7 150 183.3

Westinghouse Electric Corporation Sharon Transformer Division. Sharon. Pa. 16146 Printed in USA

I Pri- Sec· Primary Current f01 Secondary mary ondary Current of 5 Amperes Turns Tums

100/5 150/5 200/5 300/5 Ratio Ratio Retio Ratio

1 + 10 35 47.5 60 85 1 + 9 33.7 46.2 58.7 83.7 1 + 8 32.5 45 57.5 82.5 1 + 7 31.2 43.7 56.2 81.2 1 + 6 30 42.5 55 80 1 + 5 28.7 41.2 53.7 78.7 1 + 4 27.5 40 ,52.5 77.5 1 + 3 26.2 38.7 51.2 76.2 1 + 2 25 37.5 50 75

1 + 1 23.7 36.2 48.7 73.7 1 0 22.5 35 47.5 72.5 1 - 1 21.2 33.7 46.2 71.2 1 - 2 20 32.5 45 70 1 - 3 18.7 31.2 43.7 68.7 1 - 4 17.5 30 42.5 67.5 1 - 5 1 - 6 26 36 46 66 1 - 7 25 35 45 65

24 34 44 64 1 - 8 23 33 43 63 1 - 9 22 32 42 62 1 -10 21 31 41 61

20 30 40 60 2 +10 19 29 39 69 2 + 9 18 28 38 58 2 + 8 2 + 7 17 27 37 57 2 + 6 16 26 36 56 2 + 6 15 25 35 65 2 + 4 2 + 3 20.8 29.2 37.5 54.2 2 + 2 20 28.3 36.7 53.2

19.2 27.5 35.8 52.5 2 + 1 18.3 26.7 35 51.7 2 0 17.5 25.8 34.2 50.8 2 - 1 16.7 25 33.3 50 2 - 2 15.8 24.2 32.5 49.2 2 - 3 15 23.3 31.7 48.3 2 - 4 14.2 22.5 30.8 47.5 2 - 5 13.3 21.6 30 46.7 2 - 6 2 - 7 17.1 24.3 31.4 45.7

16.4 23.6 30.7 45 2 - 8 15.7 22.9 30 44.3 2 - 9 15 22.1 29.3 43.6 2 -10 14.3 21.4 28.6 42.9

13.6 20.7 27.9 42.1 3 +10 12.9 20 27.1 41.4 3 + 9 12.1 19.3 26.4 40.7 3 + 8 11.4 18.6 25.7 40 3 + 7 3 + 6 14.4 20.7 26.9 39.4 3 + 5 13.8 20.1 26.3 38.8 3 + 4 13.1 19.4 25.6 38.1 3 + 3 12.5 18.8 25 37.5 3 + 2 11.9 18.2 24.4 36.9

11.2 17.6 23.8 36.3 3 + 1 10.6 16.9 23.1 35.6 3 0 3 - 1 12.8 18.3 23.9 35 3 - 2 12.2 17.7 23.3 34.4 3 - 3 11.7 17.2 22.8 33.9 3 - 4 11.1 16.7 22.2 33.3 3 - 5 10.5 16.1 21.7 32.8 3 - 6 10.0 15.5 21.1 32.2 3 - 7 9.4 15 20.5 31.7

3 - 8 11.5 16.5 21.5 31.5 3 - 9 11.0 16 21 31 3 -10 10.5 15.5 20.5 30.5

10.0 15 20 30

9.5 14.5 19.5 29.5

9.0 14 19 29

8.5 13.5 18.5 28.5

Pri- Soc· mary ondary

400/5 500/5 600/5 Turns Turns

Ratio Ratio Ratio

110 135 160 4 +8

108.7 133.7 158.7 4 +7

107.5 132.5 157.5 4 +5

106.2 131.2 156.2 4 +5 105 130 155 4 +4

103.7 128.7 153.7 4 +3

102.5 127.5 152.5 4 +2

101.2 126.2 151.2 4 +1 100 125 150 4 0

98.7 123.7 148.7 4 -1

97.5 122.5 147.5 4 -2

96.2 121.2 146.2 4 -3 95 120 145 4 -4

93.7 118.7 143.7 4 -5

92.5 117.5 142.5 4 -6

86 106 126 5 +6 85 105 125 5 +6 84 104 124 5 +4 83 103 123 5 +3 82 102 122 6 +2 81 101 121 5 +1 80 100 120 5 0 79 99 119 5 -1 78 98 118 5 -2

77 97 117 5 -3 76 96 116 5 -4 75 95 115 5 -5

70.6 87.5 104.2 6 +6 70 86.7 103.3 6 +4

69.2 85.8 102.5 6 +3

68.3 85 101.7 6 +2

67.5 84.2 100.8 6 +1

66.7 83.3 100 6 0

65.8 82.5 99.1 6 -1 65 81.7 98.3 6 -2

64.2 80.8 97.5 6 -3

63.3 80 96.7 6 -4

60 74.3 88.6 7 +4

59.3 73.6 87.9 7 +3

58.6 12.9 87.1 7 +2

67.9 72.1 86.4 7 +1

67.1 71.4 85.7 7 0

66.4 70.7 85 7 -1

55.7 70 64.3 7 -2 55 69.3 83.6 7 -3

54.3 68.6 82.9 7 -4

51.9 64.3 76.9 8 +3

51.3 63.7 76.3 8 +2

50.6 63.1 75.6 8 +1 50 62.5 75 8 0

49.4 61.9 74.4 8 -1

48.8 61.2 73.8 8 -2

48.1 60.6 73.1 8 -3

46.1 57.2 68.3 9 +3

45.5 56.7 67.8 9 +2 45 66.1 67.2 9 +1

44.4 55.6 66.7 9 0

43.9 55.0 66.1 9 -1

43.3 54.4 65.5 9 -2

42.8 53.9 65.0 9 -3

41.5 51.5 61.5 10 +3 41 51 61 10 +2

40.5 50.5 60.5 10 +1 40 50 60 10 0

39.5 49.5 59.5 10 -1 39 49 59 10 -2

38.5 48.5 58.5 10 -3

November 5, 1974 Supersedes DB 44-200 Pages 1 and 2, dated November, 1969

E,D,C/2047/DB

Westinghouse Electric Corporation Sharon Transformer Division Sharon, Pa., U.S.A. 16146

600 Volts, 10Kv Bil Primary Volts: 240 through 600 Indoor/Outdoor, 60 Hertz

44-200 D WE A

Product Bulletin

Type EMP Voltage Transformers

44-200 D WE A

Product Bulletin

Application The type EMP is a small, light-weight molded voltage transformer specifically designed for light metering burdens in applications where size and weight are at a premium.

Accuracy ANSI Metering Accuracy Class (60 Hz):

0_6 Class for W Burden 1_2 Class for X Burden

Type EMP will maintain 0.3 metering accu racy for most single meter applications.

Ratings Thermal Rating 150 va at 30· C ambient, 100 va at 55· C ambient

Temperature Rise 55· C at 30· C ambient, 30· Cat 55· C ambient

Construction Features Core and Coils Premolded forms are used for the winding spool and terminal brackets. A wound type core is assembled with the coil by banding the two securely into a cradle form_ This rigid assembly is then completely enclosed in rubber.

Primary and Secondary Terminals The terminals are stud type. Polarity mark ings and high and low voltage identification are molded In raised letters in the body of the transformer. Sealable terminal covers can be supplied for high and low voltage.

Base Mounting A detachable aluminum base comes with all ratings.

Selector Guide Without Terminal

Primary Winding Covers Volts Ratio Style Number

240/416Y 2,1 254A476GOI

288/500Y 2.4,1 254A476G02

JOO/S20Y 2.5:1 254A476G05

480/480Y 4:1 254A476GOJ

600/600Y 5:1 254A476G04

Further Information Prices: Price List 44-020

With Terminal Covers Style Number

254A478GOI

254A478G02 254A478G05

254A478GOJ

254A478G04

Westinghouse Electric Corporation Sharon Transformer Division Sharon, Pa .. U.S. A. 16146

Dimensions and Weights-T-1691-65

/"-===-7-- Nameplate .--+--.' P-"c!-±--HI Polarity Mark

.190-32 Stud Type Terminal

Maximum Dimensions: Inches

A B c

Ibs.

r- 2f2 4;t =------1 di~~'r-'=1==~:Y~r---t-t?HV7r[[@~o ~¥I

Removable Terminal Cover

Performance Curve

3~ A j j

Typical ratio correction factors and phase angle values plotted for standard burdens, using the Farber Method ("The Analytical and Graphical Determination of Complete Potential Transformer Characteristics", Settles, Farber, Conner, AlEE Transaction Paper 60-1246, October, 1960.)

1.006 r;:;:iiiii_;=""'i;:-=~iiiii;::-:===;:'{""''''''''=~r==''''''"'i'''===ii'i

1.000 o U 0.998 c o

'" ! 0.996

.3

& 0.994 -30 -10 o +10 +20 +30

Phose AnQle in Minutes

SECTION 1 ~_GENERAL INFORMATION

TYPE W-2 WESTINGHOUSE ROTARY SWITCHES

1-5 CONSTRUCTION

Instrument and control switches are similar in construction and space requirements and differ only in the method of operating the contacts. Contacts on all switches are of the direct acting type, which have gained an enviable record for reliability.

The body of the switch is of unit construction and uses glass polyester insulating material as a housing for the contacts. This insures maximum electrical insulation between contacts, requires a minimum of space, and yet allows ample room for wiring.

The first unit of every switch includes a snap action posi tion locator in the instrument switch, or a spring return assembly in the control switch. The terminals are separated by barriers which are a part of the unit housings and con sists of screws which match standard switchboard eqUipment •.

SHAFT - A steel operating shaft runs through the various units.

CONTACTS - Both the moving and stationary contacts are made of bronze alloy combining high conductivity with mechanical strength. They are silver plated and of ample cross sec tion to dissipate heat quickly and effectively, thereby preventing welding. Tests have proved these contacts to have an exceptionally low resistance, even after interruption of high currents. Good contact pressure is assured by means of compression springs which carry no current. Because the contacts are enclosed, there is little possibility of dirt or dust affecting the operation of the switch.

.'~-'--~ v-,v- v,' ,_ .... ,.)-" '. , ! ..•

SECTION 1 - GE~~RAL INFORMATION

1 - 6 INSTRUMENT SWITCHES

DESCRIPTIVE INFORMATION

e Application The Type W-2 switch is designed for use as an instru ment. control or general purpose switch. It is compact. yet of sufficient size to provide long. trouble-free service when ap plied within the specified ratings.

Design flexibility of internal parts and con tacting. plus external jumpering 01 the con tact studs affords almost limitless switching combinations for relatively few standard components. The design flexibility is pro vided in the basic switch styles. A complete switch is made up of a basic switch style.

one of several styled handles. a nameplate connector diagram style and a nameplate.

The W-2 switch may be ordered as a single style unit where such a style meets a specific application. Where a single listed style does not meet a specific application. the desired switch may be ordered by specifying the re quired styled components.

Instrument Switches: Maintained con tact type for use with all classes of electrical instruments. relays. meters. and for perform ing various circuit combinations. Designed for panel mounting and equipped with handles for manual operation.

Control Switches: Momentary contact type being spring return to the original or "off" position. For use with circuit breakers and other electrically controlled apparatus.

Panel mounting. Handles for manual oper ation.

The Type W-2 switch can be furnished with a tumbler pin keylock. Such lock can be assembled either to the right or to the left of the switch unit on the horizontal center line, or, as is considered standard, above the switch unit on the vertical center line as shown in the illustration. The unit is so de signed as to permit locking the switch in anyone or in each of several positions. The position or positions in which a switch is to be locked must be specified on order.

The style nUrT]bers shown in this bulletin apply to switches for mounting on l' - Yo inch thick panels only. Switches for mount ing on thicker panels may be ordered as "similar to" a desired style except for thick panel.

Advantages Small Size Variable Circuitry by "You Wire It" More Contacts per Unit Volume Roller-Wipe Spring Actuated Contacting Momentary and Maintained Contact De signs. or in Combination Greater Availability of Contacts with Termi nal Identification for Automated Wiring or Application Changes in Field. See Page 23 Double Break Contacts per Stage

DB 34-251 Page 1

Instrument and Control " Switches, Type W-2

600 Volts. 20 Ampere Continuous Capacity

In This Bulletin Instrument and Control Switches

Application Design Features Operation Construction Details Standard Switches Position Tabulations Basic Switches Additional Position Tabulations Dimensions Ordering Information

February, 1968 Superoedes DB 37-150 doted November. 1963

E. 0, C/1976/DB

Page

6-17

19-22

23-24

DB 34-251 Page 2

CI

Design Features General Construction The W-2 switch consists essentially of an operating handle, face plate, control hous ing, contact frame assembly and rotor assem bly. It can be built upin any number of stages from 1 to 9, which stages are clamped to· gether and to the control housing by two tie bolts. A steel operating shaft ties the con tact rotors together. A metal cover on the rear holds the position stop pins, retains the shaft and provides basic switch identifica tion. For push or pull switches, the metal cover is replaced by a polycarbonate cover which houses the pull-out mechanism.

Switch Positions Each switch has a minimum of two and a maximum of twelve rotary positions with a 30· throw between positions, irrespective of the number. Each rotary position coin cides precisely with the nameplate markings.

The degree of throw between positions is fixed and cannot be changed. The number of positions of each switch can be altered by removing the rear cover and changing the position of the "stop" pin or pins located in the rear housing spacer. I n addition to rotary motion, the W-2 switch can be provided with a lateral movement (push-pull) of the rotor.

Contact Frames Two contact frame sizes are available; the half frame with six sets of contacts; three sets on the top at 11, 12 and 1 o'clock posi tions and three sets on the bottom at 5, 6 and 7 o'clock positions. The full frame with 12 sets of contacts, each set located at 30· intervals around its perimeter as are the numbers on a clock. The contact frames are made of glass polyester insulating matarial.

Contacts Switches are usually referred to as "so many stages long". For a W-2 switch, a stage of contacts consists of a contact frame (either 6 or 12 contact sets) and a rotor.

At every position location on the frame, there are two contact terminal studs in line (a set) per stage. Each of thase studs is one piece, made of bronze alloy and silver plated.

Rotors The rotors are standard in design and hold the roller contacts. Each rotor, made of glass polyester insulating material, rotates inde pendently between the stage spacer plates.

The rotor assembly is equipped with one to six rollers (as determined by the required circuitry) each of which makes contact with two adjacent stationary terminal studs to complete a circuit and so affording a double, series break contact. The silver-plated bronze alloy roller contacts provide a rolling, wiping action, are self-aligning on assembly and require no adjustment of contact pressure for the life of the switch.

Contact Flslllblllty Basic "you wire it" flexibility is available in the Type W-2 switch. While the internal con tacting is standardized for each basic type of switch; such as ammeter, voltmeter, circuit breaker, etc., by using available insulated jumpers, connections between external switch terminals can be made to obtain the desired contacting for a specific application.

This minimizes the number of basic styled switches that otherwise would be required.

Switch Dial The Type W-2 switch dial consists of two parts; i.e., a dial plate and a nameplate.

The standard control switch dial plate is die cast aluminum, with rad and green target parts, where required, and serves as the base for mounting the nameplate. The nameplate is made of a white ABS material on which is stamped in black the desired position mark ings.

Handles Handles for the Type W-2 switch are made of a phenolic insulating material designad to afford a smooth, easy, and comfortable grip of pleasing appearance. Each handle has a recessed arrow molded into it as a visual aid in positioning.

The handles are made in four shapes, i.e., oval, round, pistol grip, and large pistol grip.

Each of the shapes can be obtainad in the fixed type or the removable key type. The fixed handles are fastened to the switch shaft by a screw through the front of the handle.

There is also available a combination remov able key type handle in the pistol grip shape that can be used to operate both the Type W-2 and the Type W switches designed for removable key operation.

Oval Fixed S# 501 B787H01

Round Notched Fixed

S # 31 OC624H01

~ ltu Pistol Grip Fixed S#310C624H02

Large Platol Grip Fixed S#677C101HOl

Removable

W·2 Switch KeyShoft

W Switch

Combination

Operetion The Type W-2 switch is a rotary roller action switch. Rotation of the shaft causes the rotor rollers to roll from one set of stationary contacts to another. The number of roller contacts can vary from 1 to 6 dependi ng on the number of rotary positions required for the switch application. Each roller contact, moving radially, is held in and guided by a slot in the rotor arm. The rollers are pushed outward by spring pressure. Between roller and spring there is an insulated spring seat to reduce friction and wear. On standard potential contacts, an insulated wheel is used on both ends of the roller contact which wheels roll inside the switch stator frame.

This arrangement reduces the friction of the spring-loaded roller in riding up on the stationary contact and also results in an in creased air gap as a result of faster contact separation.

Overlapping contacts are obtained by in creasing the diameter of the contact rollers of the shorting bar. At mid-position the roller spans the space between the station ary contacts. Such rollers provide a make before-break contact in going from one position to an adjacent one.

The Type W-2 switch is available in both the maintained and the spring return types.

Both types use a housing that is ~" deep, located between the back surface of the dial plate and the frame-rotor unit. This feature permits conversion from one type to another with a minimum of parts, time and experience.

Maintained Type: On a switch of this type, the switch is held in rotary position by a starwheel mechanism. The mechanism consists of a notched, molded wheel rotating between two metal rollers mounted on spring loaded arms. This arrangement provides a positive snap action as the handle is turned.

Momentary Type: This type uses a rotor that is returned to its original position by a double coil wound spring. The spring offers minimum opposition to movement of the switch handle, but is sufficiently strong to operate the rotor for all required contacting.

For current circuits, there is available an assembly of normally closed contact be tween front -end rear terminals at each posi tion on a stage. The assembly consists of a shorting bar across the two terminals and held closed by spring pressure.