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DI R ECTIONAL OVERCU R R ENT GROUND R E LAYS

of back contacts of the directional unit, or 26 ms total

operating time for overcurrent unit. The total time for

*

directional unit is 56 ms; and, since this is the long

e st time, 5 1 ms is the total operating time o f the re

lay.

Example 2:

Let: Ipol = 20 amps.

lop = 23. 1 amps.

T (tap) = 1 amp.

¢

i = 0

•

MPP = lop Ipol Cos ¢

. 25

MPP = ( 20 ) ( 23 . 1 )

=

1850

. 25

*

Entering Fig. 5 , the directional unit closing time

is 12 ms, and the opening time of its back contacts is

1 ms. The total operating time for the directional unit

is 12 ms.

*

For overcurrent unit:
Multiples of plckup = lop = 23 . 1 = 23. 1

T

Referring to Fig. 6, the overcurrent unit co ntact

closing  time  is  about  10  ms.  Therefor e,  the  total  op er
ating  time  for  this  unit  is  1 3   plus  1  or  14  ms.  In  this
case  the  total  operating  time  of  relay  is  14  ms.

Tri p C i rcuit

The main contacts will safely close

30

amperes

at

250

volts d-e and the seal-in contacts of the in

dicating contactor switch will safely carry this cur
rent long enough to trip a circuit breaker.

The indicating contactor switch has a pickup of

approximately

1

ampere .

Its

d-e

resistance is

0. 1

ohms.

C y l i n de r U n i t C o n t a c t s

The moving contact assembly has been factory

adjusted for low contact bounce performance and
should not be changed.

The set screw in each stationary contact has

been shop adjusted for optimum follow and this ad

justment should not be disturbed.

S E T T I N G S

O vercurrent U n i t ( I )

The only setting required i s the pickup current

setting which is made by m eans of the connector
screw located on the tap plate. By placing the con

nector screw in the desired tap , the relay will just
close its contacts at the tap value current .

For carrier relaying the carrier trip overcurrent

unit  located  in  the  type  KRP,  KRC  or  KRD  relay
should  be  set  on  a  higher  tap  than  t he  c arrier  start
overcurrent  unit  located  in  the  type  KA  relay  at  the
opposite  end  of the  line.

C A U T I O N

Since the tap block connector screw car

ries operating current, be sure that the screw is

turned tight .

I n order t o avoid opening the current transformer

circuits when changing taps under load, connect the
spare tap screw in the desired tap position before

removing the other tap screw from th e original tap
position.

D i rect ional U n i t ( D )

N o s etting i s required.

I N S T A L L A T I O N

The rel ays shoul d b e mounted on switchbo ard

panel s or their equival ent in a l ocation free from dirt,

moisture, excessive vibratio n and h e at. Mount the
relay vertically by means of the two mounting studs

for projection mounting or by m eans of the four mount

ing hol e s on the flange for the semi-fl ush mounting.

5

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. ElectricalPartManuals

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Содержание KRD-4

Страница 1: ...PERSEDES I L 41 l37 3C Denotes chan ge from superseded issue The cylinder unit consists of three basic assem blies an electromagnet assembly a moving element assembly and a stationary closing assembly The electromagnet assembly consists of an elec tromagnet an adjustable magnetic core two magnetic adjusting plugs lower bearing pin and a die casted aluminum frame The moving element assembly con sis...

Страница 2: ...L OVERCURRENT GROUND RELAY DECOU PLER TRANSFORMER Fig 1 Type KRD 4 Relay Front View OVERCU RR ENT UNIT OVERCUR RENT TAP BLOCK Dl RECTIONAL UNIT INDICATING CONTACTO R SWI TCH w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 3: ...______________________________________________________ L 4 1 13 7 3 o Fig 2 Type KRD 4 Relay Rear View __ POLARIZING REACTOR SATURATING TRANSFORM ER 1 VARISTOR SATURABL E SHUNT DECOUPLER CAPACITOR 3 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 4: ...d to the pro tected transmission line as shown in Fig 4 In such a connection the relay operates to disconnect the line for ground faults of a definite magnitude that are flowing in a specified direction 4 The directional unit of the relay compares the phase angle between the fault current and the polari zing quantities of the system and either produces a contact closing torque for faults in the tr...

Страница 5: ...les of pickup 3 6 0 5 Entering the curve in Fig 6 at multiples of pickup equal to 6 the closing tim e for the overcurrent is 14 ms However the total operating time for the overcurrent unit is 14 plus 4 ms which is the opening time of back contacts of the directional unit or 18 ms total operating time for the overcurrent unit The total operating time for the directional unit is 33 ms and since this...

Страница 6: ...Ttl OIHCTIOIAL n U IT lEO IAIIIU TUT ITCI c l ll TUT IAa ff IIAL 629A509 Fig 3 Internal Schematic of the Type K RD 4 Relay in the Type FT3 1 Case 6 TABL E I I DIR ECTIONAL UNIT CALI B RATION I n t 1 Adjustment All Ranges ious torque in Right front view I tact closing direction Plug Screwed out left front view until spurious tor I que is reversed All Ranges 8 0 lspurious torqu in j Left front view ...

Страница 7: ...ay at the opposite end of the line CAUTION Since the tap block connector screw car ries operating current be sure that the screw is turned tight In order to avoid opening the current transformer circuits when changing taps under load connect the spare tap screw in the desired tap position before removing the other tap screw from the original tap position ENERGY REQUIREMENTS BURDEN DATA OF OPERATIN...

Страница 8: ...d then turning the proper nut with a wrench For detailed information refer to I L 4 1 076 A D J U S T M E N T S A N D M A I N T E N A N C E The proper adjustments to insure correct opera tion of this relay have been made at the factory Up on receipt of the relay no customer adjustments other than those covered under SETTINGS should be required Acceptance Check The following check is recommended to...

Страница 9: ...KUP EpoL POLARIZING VOLTAGE IPOL PQLARI Z lNG CURRENT Iop OPERATING CUR ENT ANGLE B t WHI CH lop LlGS EPOL f ANGLE B t WH CH l qp L AGS lpQL UNIT CLOSING TIMES A l CURRENT VOLTAGE OR DUAL POLARIZED Bl VOLT VOLTAGE POL AR I ZED DIRECTIONAL U N I T OPENING TIMES r _ CURRENT VOLTAGE OR DUALPOLI RIZEO I I I I 4 5 6 1 1910 20 30 40 so eo ao 100 200 3oo 400 6oo aoo tooo tOOO 3000 MULTIPLES OF PRODUCT PI...

Страница 10: ...contact in po sition 3 The sensitivity adjustment is made by vary ing the tension of the spiral spring attached to the moving element assembly The spring is adj usted by placing a screwdriver or similar tool into one of the notches loc ated on the periphery of the spring ad juster and rotating it The spring adjuster is located on the underside of the bridge and is held in place by a spring type cl...

Страница 11: ... cylind er unit _EJ _ P I ug Adjustment Apply current to terminals 8 and 9 with all other terminals open circuited Plug adjustment is then made per Table II such that the KRD 4 RELAY TEST CIRCUIT A _ ______ B __ I PHASE SHIFTER c A I _ 6 PHASE ANGLE A METER VARIAC W M spurious torques are reversed The plugs are held in po sition by upp er and lower plug clips These clips need not be disturbed in a...

Страница 12: ...IOLES 14 011 CUTOUT PAIIEL CUTOUT DRILLIIIG FOR SEMI FLUSM NT PAIIEL DRI L L I NG OR CUTOUT FOil PRO Jf CTIOII MTG FROIIT VIEW DI A HOLES FOil 190 32 MTG SCIEWS 1 1e DIA 2 MOLES TEJioiiiiAL IIUMBER 57 D 7902 Fig 1 Outline and Drilling Plan for the Type KRD 4 Relay in the F T3 1 Case WESTINGHOUSE ELECTRIC CORPORATION RIILAY INSTRUMIINT DIVISION NIIWARK N J Printed In u s A w w w E l e c t r i c a l...

Страница 13: ...ode of each diode is connected to the cathode of N EW I NF ORMATION the followin g diode to droduce a m aximum outf ut voltage of 1 4 volts or two diodes forward voltage drop Amplifier The amplifier consist of the two NPN transistors 1 Q l and 1 Q3 The second stage of the amplifier is an emitter follower which provides an output to the next stage The turn on timer consists of a potentiometer 1R14 ...

Страница 14: ...DUAL POLARI ZED GROUND DIR ECTIONAL RELAY __________________ _ Fig 1 R elay s Front Picture Fig 2 Relay s Rear Picture 2 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 15: ...o the relay case by two hinges and a slotted strap from the bottom and can be closed by two screws which are located at the top of the door The slotted straps in the bottom allows the door to be opened up to 90 degrees and stops the door from sliding to the left and right The door can be removed by unscrewing the slotted st ap from the door The front panel consists of 2 parts 1 The circuit boards ...

Страница 16: ...ppear across resistor 2R7 Overcurrent Unit Operation The overcurrent unit is also a st atic device and produc es a de volt age output when t he input current 4 exceeds t he set value The component s of t he overc urrent unit are con nect ed as shown in Fig 3 with no input to t he relay transistors 3Q 1 and 3Q 2 are in t he nonconducting condition and no output is obt ained f rom t he relay Zener d...

Страница 17: ... ms Current Reversal Reset Time When a fault current reversal occurs the relay is reversed and the directional unit resets in 1 2 ms or l ess Both the directional unit and overcurrent unit must operate before a trip output can be obtained Hence the unit which takes the longer time to op er ate determines when an output will occur The over current unit cannot operate until the short circuit in its ...

Страница 18: ... to zero This angle should be 150 3 degrees Circulate 5 amperes into Terminal Block ter 6 minal 4 and ou t 3 into terminal 1 a nd out 2 in phase The voltage outpu t should be obta ined Apply 10 amperes into 4 out 3 into 1 out 2 Apply 100 volts to terminals 7 and 8 cu rrent la gs voltage by 60 Voltage output should be obtained Reverse terminal connections 7 a nd 8 the output should read zero Tak e ...

Страница 19: ... Terminal Block terminals 1 and 2 1 is polarity The rel ay should pick up at maxi mum sensitivity current lags 60 16 Disconnect the voltage termi nal 7 and 8 and circulate 0 5 amperes through Terminal Block terminals 1 and 2 and through 4 and 3 The relay should op erate at 20 volts de which is obtained between Jack Terminal 2JR and 2JB Also check a 20 volts de out put between printed circuit bo ar...

Страница 20: ...ondition Set the relay for voltage pol arizing apply 100 volt to the voltage terminal and 10 amp eres to the op erating current transformer terminal block 1 and 2 with the proper polarity Set the phase shifter on 0 check the test point number 1 by an oscillo scop e and comp are them with the given waveforms If the ring modul ator output is obtained but there is no final output the trouble would be...

Страница 21: ...NIT OUT PUT 6 II DUAL DIRECTI ONAL CIRCUIT 80 I 5317020001 I IOH OVERCURRENT C I R C U I J BO 5309033G02 Fig 3 Internal Schematic 2 I L 41 137 4 D I R EC T IONALLY SUPERVISED OYERCURRENT OUTPUT 4 5317034 9 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 22: ...IJill SINSITlVITY POUNTIAL POLAJIIZATION NO OUTl UT Iop OUTPUT roo lPOL RE I RIENCE NO OUT T PHASOR DIAIRAII FOR IIIAXIIIUIII SENSITIVITY CURRENT POLAJIIZ ATION OUTPUT Fig 4 External Schematic lO SIU o Pil OT AUXILIAJIY r oo Plc5 202 C493 I c c r 0 r tD N m c C tD 0 c z c 2 tD m n 1 0 z r g m r E l e c t r i c a l P a r t M a n u a l s c ...

Страница 23: ...H I PQ ARIIEO MPP poL I OP COS 8 60 IIPOL IOPCOS IJ 0 l1 t r I MAXIMUM OPENATIN8 TIME 2 0 k 1 MI NIMUM Ol f RATIN8 TIME r t 3 4 s a T I I IO 20 30 40 10 0 10 100 zoo 100 400 100 100 1000 MULTIPLE OF PRODUCT PICKUP Fig 5 Operating Timing Curve For Directional Unit 1 t MAXIMUM O P E R AT I NG TIMES M INIMUM O PERATING TIMES K _ r 2 4 6 8 1 0 1 2 14 16 18 20 M U LT I PLE S OF PIC K UP VALUE 876A3 50 ...

Страница 24: ... 1 4 6 8 1 0 1 2 I 4 I 6 I 8 2 0 2 2 24 2 6 2 8 M ULTI PLES O F PICKUP C URRENT Fig 7 Reset Timing Curve For Overcurrent Unit 4 Ia Ic 4 4 VOLTAGE POLARIZED TEST CIRCUIT I R I 4 Fig 8 Testing Circuit 551 876A348 30 32 34 38 876A353 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 25: ... 41 C 2 rnJ e ufr F e o IDJJ l JI BJQ ITIJ il ill em D ciD e GD LQI 14 i c n_ F ig 9 Printed Circuit Board 88 3 0 ill 1IIT IH lllin ill J l 6 C2 ml I y 1 R I 8 rr m I um 1 1 0 J I I ill I lJ lliT il QliJ illt I I 53 1 7D20 5317D22 5309D33 c c r 0 r o N m c C o 0 c z c 52 o m n 1 0 z r o m r r w E l e c t r i c a l P a r t M a n u a l s c ...

Страница 26: ... _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 14 Fig 10 Waveforms Sweep 2 msl em Voltage 1 1 R ing Modulator O utput 1 2 Transistor Output 1 3 C 1 Output 1 4 Filter Output 2 volt em 10 volt em 10 volt em 2 volt em w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 27: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 28: ...W E S T I N G H O U S E E L E C T R I C C O R P O R A T I O N RE LAY I N STR U M ENT D IVI S I O N N EWAR K N J Printed in U S A w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 29: ...REW 1 1 lf FOR TH I CK I ANEL USE I 32 STUD _ I I I 1 1 I I t t T I 1 J I J I 1 V I 1 2 r si 1 PANEL CUTOUT DRI LLI NG FOR SEMI FLUSH MTG r r i6 s e I _ PANEL DRI LLI NG OR CUTOijT FOR PROJECT I014 MTG FRONT V I EW _J 32 DI A 2 HOLES 16 mu4 1 UL NUMBER 57 D 7902 Fig 1 1 Outline and Drilling Plan for the KRP KR C an d KRD R e lays in the FT3 1 Cbse W E S T I N G H O U S E E L E C T R I C C O R P O ...

Страница 30: ...OUND R ELAYS I L 4 1 1 37K B c ss S l i H k V F P C t J I t I I I t p I I I rl k t I _ I I I d c c O b Figure 10 Test Connections lCRC 1 9 I t I _ c c KR l 9 I 9 I b A b d c 1 5 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 31: ...s Torque In Contact Closing Direction Left Front View 80 Spurious Torque In Contact Opening D irection Right Front View Contacts remain open PHASE ANGLE RE LAT IONSH I P I lagging V by 60 7r I in phase with V I lagging V by 60 Yr I in phase with V I 0 leading IP by 40 7r In phase Ia leading 1v by 40 7r In pnase ADJUSTMENT Right Front View Plug Screwed Out Until Spurious Torque is Re versed Left Fr...

Страница 32: ...0 Close the main relay contacts and check to see that the relay picks up and the target drops between 1 and 1 2 amperes d e To increase the pickup current remove the molded cover and bend the springs out or away from the cover To decrease the pickup current bend the springs in toward the cover R E N E W A L P A R T S Repair work can be done most satisfactorily at the factory However interchangeabl...

Страница 33: ...g can be adjusted when the phase angle relationship between the operating circuit and the polarizing circuit is at the maximum torque angle or when the circuit relationship has the operating and polarizing circuits in phase 12 STATUM IUS SATURUIIICi nusronu 1 2 l SfC DEVICE IIUNIER CIIA RJ I OS Ul 671t DIRECTIOUL OHIICUIIIIUH OM0 110 IUL U DC TIIP IUS I 1 0 TYf E KRP 1 I I II V DlllECTI IJfiiAL UM...

Страница 34: ...by a neon lamp in the contact circuit when energized with the required current The pick up of the overcurrent unit with the tap screw in any other tap should be within 5 of tap value If adjustment of pick up current in between tap settings is desired insert the tap screw in the next lowest tap setting and adjust the spring as described It should be noted that this adjustment results in a slightly ...

Страница 35: ...s may be dic tated by experience to be suitabl e to the particular application All contacts should be periodically cleaned A contact burnisher S1tl82A836H01 is recommended for this purpose The use of abrasive m aterial for clean ing contacts is not recommended because of the danger of embedding small particles in the face of the soft silver and thus impairing the contact Cal i brat i o n Use the f...

Страница 36: ...y have been made at the factory Upon receipt of the relay no customer adjustments other than those covered under MSETTINGS should be required Acceptance Check The following check is recommended to insure that the relay is in proper working order Overcurrent Unit I 1 Contact Gap The gap between the stationary and moving contacts with the relay in th e de ener gized position should be approximately ...

Страница 37: ...44 16 9 9 09 3 1 0 2 78 1 2 14 70 30 0 2 58 16 25 00 30 0 2 40 10 10 5 30 0 2 60 15 22 0 29 5 2 40 20 37 8 29 0 2 35 10 40 24 55 2 29 0 2 30 30 84 0 28 5 2 25 40 149 0 28 0 2 24 Degrees current lags voltage TT Voltages taken with Rectox type voltmeter OVERCU RRENT UNIT BU RDEN DATA AT H I GH CURRENTS TYP E K R D REL AY AMPE R E R A N G E Tap Value Current Multiples of 20 Tap Value Current VA TT 65...

Страница 38: ...6 37 9 5 90 37 4 3 0 1 92 38 4 5 34 38 1 4 0 3 06 39 6 4 77 39 1 2 1 68 39 8 10 50 38 8 3 2 58 37 3 7 03 3 6 5 2 8 4 3 75 36 1 5 87 35 8 5 5 19 35 8 5 1 7 35 7 6 7 07 35 8 4 88 36 1 8 1 1 30 35 7 4 5 1 36 8 4 2 17 42 2 3 3 7 42 0 6 3 20 38 0 2 22 37 8 4 1 6 8 4 64 35 5 1 80 36 0 9 5 37 35 8 1 67 35 7 1 2 8 52 34 8 1 46 35 0 16 13 8 33 7 1 33 35 0 10 6 08 34 0 1 52 33 9 15 12 2 32 6 1 34 34 1 20 20...

Страница 39: ...8 2 2 0 0 96 28 7 6 09 27 8 1 4 2 5 1 25 28 7 5 04 28 1 3 0 1 63 29 6 4 57 28 9 4 0 2 55 30 1 3 99 30 0 2 1 55 38 3 9 54 37 6 3 2 26 35 5 6 25 34 8 4 3 20 33 2 4 98 33 1 2 8 5 4 39 32 8 4 40 32 7 6 5 78 32 4 4 05 32 1 8 9 31 31 8 3 62 32 4 4 2 05 42 8 3 24 42 0 6 2 94 38 5 2 03 38 0 8 4 09 35 7 1 59 35 7 4 16 9 4 77 34 8 1 46 35 5 12 7 30 33 3 1 24 34 3 16 11 5 32 0 1 1 1 34 2 10 5 23 30 9 1 33 30...

Страница 40: ... e and should not b e c hanged The set screw in eac h stationary c ontact has been shop adju sted for optimu m follow and this ad ju stment shou ld not b e disturb ed S E T T I N G S Overcurrent Uni t I The only setting required is the pic kup current setting whic h is made by m eans of the c onnector sc rew loc ated on the tap plate By pla c ing the c on nector screw in the desired tap the relay ...

Страница 41: ... 4 to 16 and the 10 to 40 ampere range relays the minimum pick up is 1 ampere for the cur rent polarized directional unit and 1 volt and 4 4 amperes for the voltage polarized directional unit T I M E C U R V E S The time curves for the KRD relay are shown in Fig 5 and 6 Fig 5 consists of three curves which are 1 Directional Unit opening times for current and volt age polarized 2 Directional Unit c...

Страница 42: ...ore upon energization of the switch When the switch clos es the moving contacts bridge two stationary contacts completing the trip circuit Also during this operation two fingers on the armature deflect a spring located on the front of the switch which allows the operation indicator target to drop The target is reset from the outside of the case by a push rod located at the bottom of the J r W I CA...

Страница 43: ...ECTIONAL UNIT DIRECTIONAL UNit PHASE SHIFTER INDICATING CONTACTOR SWITCH 1 p ICS I K R P OVERCURRENT TRIP CONTACT HIGH SPEED OVERCURRENT UNIT DIRECTIONAL TORQUE CONTROL CONTACT DIRECTIONAL TRIP CONTACT D VOLTAGE POLARIZED DIRECTIONAL UNIT DIRECTIONAL TRIP CONTACT D DIRECTIONAL TORQUE CONTROL CONTACT D CURRENT POLARIZED DIRECTIONAL UNIT i l INDICATING CONTACTOR r SWITCH ICS K R D 2 0 m n t 0 z r 0 ...

Страница 44: ...ue The electromagnet has two s eries connected polarizing coils mounted diametrically opposite one another two series connected operating coils mounted diamEtrically opposite one another two magnetic adjusting plugs upper and lower adjustin g plug clips and two locating pins The locating pins are used to accurately position the lower pin bearing which is threaded into the bridge The electromagnet ...

Страница 45: ...EDES I L 41 1 37 30 Denotes change from superseded 1 ssue The cylinder unit consists of thre e basic assem blies an electromagnet assembly a moving element assembly and a stationary closing assembly The electromagnet assembly consists of an elec tromagnet an adjustable magnetic core two magnetic adj usting plugs lower bearing pin and a die casted aluminum frame The moving element assembly con sist...

Страница 46: ... RELAY DECOU P L E R TRANSFORMER Fig 1 Type KRD 4 R elay Front Vi ew DECOUPLER CALIBRATION R ESISTOR OYERCURR ENT UNIT OVERCURRENT TAP BLOCK DIR ECTIONAL UN I T INDICATING _ CONTACTO R SWI TCH w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 47: ...__ __ __ __ __ __ ____ __ ______ ________ __ __ ____ ____ ___ _ L _ _ 41 _ 1 3 7 3E Fig 2 Type KRD 4 Relay Rear View POLARIZING REACTOR SATU RATING TRANSFO RMER VARISTO R SATURABLE SHUNT DECOUPLER CAPACI TOR 3 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 48: ...lay is connected to the pro tected transmission line as shown in Fig 4 In such a connection the relay operates to disconnect the line for ground faults of a definite magnitude that are flowing in a specified direction 4 The directional unit of the relay compares the phase angle between the fault current and the polari zing quantities of the system and either produces a contact closing torque for f...

Страница 49: ...ples o p1ckup 3 6 0 5 Entering the curve in Fig 6 at multiples of pickup equal to 6 the closing time for the overcurrent is 1 4 m s However the total operating time for the overcurrent unit is 14 plus 4 ms which is the opening time of back contacts of the directional unit or 18 ms total operating time for the overcurrent unit The total operating time for the directional unit is 33 ms and since thi...

Страница 50: ...rnal Schemati c of the Type KRD 4 Relay in the Type FT3 1 Case 6 TABL E I I DIR ECTIONAL UNIT CALI BRATION Relay Cur rent eres Both Plugs In Condition Rating Amp Adj ustment All Ranges 8 All Ranges 8 0 Spurious torque in con Right front view tact closing direction Plug Screwed out left front view until spurious tor que is reversed 1 0 Spurious torque in Left front view contact opening di PIug scre...

Страница 51: ... the typ e KA 4 relay at the oppo site end of the line CAUTION Since the tap block connector screw car ries operating current be sure that the screw is turned tight In order to avoid opening the current transformer circuits when changing taps under load connect the spare tap screw in the desired tap position before removing the other tap screw from the original tap position ENERGY REQUIREMENTS BUR...

Страница 52: ...nuts on the studs and then turning the proper nut with a wrench For detailed information refer to I L 4 1 076 A D J U S T M E N T S A N D M A I N T E N A N C E The proper adjustments to insure correct opera tion of this relay have been made at the factory Up on receipt of the relay no customer adjustments other than those covered under SETTINGS should be required Acceptance Check The following che...

Страница 53: ...PERAT I N G CURRENT 8 ANGLE BY W H I CH 1 oP LlGS EpoL ANGLE BY WHI CH l Q_P l AGS lpQ K DIRE CTIONAL UNIT CLOSING TIMES A l CURR E N T VOLTAGE OR D U AL POLARIZED B l V OLT VOLTAGE P OL AR IZED 1 r r DIRECT I ONAL UNIT OPENING TIMES r CURRENT VOLTAGE OR DUAL POLARIZED I I I I l l I l l 4 5 6 7 8 9 10 20 30 40 50 80 10 100 200 300 00 600 100 1000 2000 3000 MULTIPLES OF PRODUCT PICKU P Fig 5 Typ i ...

Страница 54: ...tivity adjustment is made by vary ing the tension of the spiral spring attached to the moving element assembly The spring is adjusted by placing a screwdriver or similar tool into one of the notches located on the periphery of the spring ad juster and rotating it The spring adjuster is located on the underside of the bridge and is held in place by a spring type clamp that does not have to be loose...

Страница 55: ...nit 6 Pl ug Adjustment Apply current to terminals 8 and 9 with all other terminals open circuited Plug adjustment is then made per Table II such that the KRD 4 RELAY TEST CIRCU IT ___ ______ ___ I v v PHASE I i v SHIFTER A I 0 PHASE ANGLE r METER VARIAC u j spurious torques are reversed The plugs are held in position by upper and lower plug clips These clips need not be disturbed in any manner whe...

Страница 56: ...I 1t loo P EL CUTOUT DRI LL I NG FOR SEMI FlUstl MT 2 16 1 PANEL DRI LL I NG 0 CUTOUT FOR PIIOJf CTI011 MTG FROIIT V I EW DI A HOLES FOR 190 32 MTB SCREWS 1 I I DIA 2 NOLES TEIINIIIAL IIUMBEl 57 D 7902 Fig 1 Outline and Drilling Plan for the Type KRD 4 Relay in the FT3 1 Case WESTINGHOUSE ELECTRIC CORPORATION RKLAY INSTRUMKNT DIVISION NKWARK N J Printed In U S A w w w E l e c t r i c a l P a r t M...

Страница 57: ...Denotes change from superseded 1 ssue The slectromagnet has two series connected polarizing coils mounted diametrically opposite one another two series connected operating coils mounted diametrically opposite one another two magnetic ad justing plugs upper and lower adjusting plug clips and two locating pins The locating pins are used to accurately position the lower pin bearing which is mounted o...

Страница 58: ... _ RI DGE RECTIFIER CS 1 UNIT ICS UNIT Fig 1 Typ e KRV Relay Without Case Front Vi ew UNIT RESISTOR Fig 2 Type KRV Relay Without Case Rear View 1 tl m a a m r E l e c t r i c a l P a r t M a n u a l s c ...

Страница 59: ... to insure coordination be tween the directional contact D and the I contact to prevent tripping on reversed faults where the directional contact was closed on load I nd i ca t i n g Con t a c to r S w i tc h I C S The d e indicating contactor switch is a small clapper type device A magnetic armature to which leaf spring mounted contacts are attached is at tracted to the magnetic core upon energiz...

Страница 60: ... e KRV relay is intended for phase fault pro tection and the directional unit has its maximum torque wh en the current leads the voltage by approx imately 30 The directional unit minimum pickup at its maximum torque angle is shown in Table 1 4 TABLE 1 RELAY RANGE DIR UNIT PICKUP 0 5 to 2 Amps 1 2 Volts and 2 Amps 1 4 1 2 Volts and 2 Amps 2 8 1 2 Volts and 2 Amps 4 16 1 2 Volts and 4 Amps 10 40 1 2...

Страница 61: ... 35 5 6 25 2 8 4 3 20 33 2 4 98 5 4 39 32 8 4 40 6 5 78 32 4 4 05 8 9 31 3 1 8 3 62 4 2 05 42 8 3 24 6 2 94 38 5 2 03 8 4 09 35 7 1 59 4 1 6 9 4 77 34 8 1 46 12 7 30 33 3 1 24 1 6 1 1 5 32 0 1 1 1 10 2 5 29 63 1 5 4 2 25 47 20 6 3 22 40 10 40 24 8 2 21 35 30 1 1 1 9 31 40 18 1 9 28 20 10 32 60 30 17 28 45 40 25 24 38 20 80 48 32 23 34 60 45 2 2 30 80 70 21 27 c J Degrees current lags voltage tt Vo...

Страница 62: ...l tap pos ition D i re c t i o n al U n i t D No setting is required I n d i ca t i n g Cont o c ta r S w i t c h U n i t I C S No setting i s required A u x i l i a ry S w i tc h C S 1 N o setting required o n the CS 1 unit except for the selection of the required 24 48 1 25 or 250 volt age on the tapped resistor This connection can be made by referring to Fig 6 6 I N S T A L L A T I O N The rela...

Страница 63: ...unit can be check ed by inserting the tap screw in the desired tap hole and applying rated tap value current The contact should close within 5 of tap value current Directional Unit D 1 Contact Gap The gap between the station ary contact and moving contact with the relay in the de energized position should be approximately 020 2 Sensitivity The directional unit should pick up at its maximum torque ...

Страница 64: ...gap of ap proximately 020 The clamp holding the stationary contact housing need not be loosened for the adjust ment since the clamp utilizes a spring type action in holding the stationary contact in position 3 The sensitivity adjustment is made by vary ing the tension of the spiral spring attached to the moving element assembly The spring is adjusted by placing a screwdriver of similar tool into o...

Страница 65: ...piral sp ring attached to the mov ing element assembly The spring is adjusted by plac ing a screwdriver or similar tool into one of the notches located on the periphery of the spring adjust er and rotating it The spring adjuster is located on the underside of the bridge and is held in place by a spring type clamp that does not have to be loosened prior to making the necessary adjustments The sprin...

Страница 66: ...de of the Micarta disc Connect lead A to proper terminal per Fig 6 Block directional unit D and I contacts close and e nergize trip circuit with rated voltage Contacts of 1 0 auxiliary switch CS 1 should make as indicated by a neon lamp in the contact circuit I n d i cati n g Conta cto r S w i t th I C S Adjust the contact gap for approximate ly 5 64 1 64 0 Close the main relay contacts and check ...

Страница 67: ...sed Then screw in for slight opening 10 40 150 6 torque 20 80 Plugs should be fully in prior to core adjustment t Slight re adjustment may be necessary of core or plugs if contact closes at these check points 6 150 Amps may be obtained by using a 1 0 5 CT as shown below connect CH ECK POINTS 80 50 and 20 Amps 120 7 5 and 30 Amp s 0J r PRI ____J T D Dir Unit operating c i rcuit on ly 1 20 OR 220 VA...

Страница 68: ...A i OR CU 0 JT TE RM I NAL AN D MOUNT I N3 DE AI L O k DIA 4 1 0L n R 190 32 MIG u WS PANEL C UTDUT t DRILL IWQ FOR SEt 11 l LU H Ml PA Nt _ DI I LL G OR C JTOI J FOR PRO H CT I CN MTGr FP ONT VIEW 3 SR 57 D 7902 Fig 8 Outline and Drilling Plan for the Type KRV Relay in the Type FT3 1 Case W E S T I N G H O U S E E L E C T R I C R E LAY I N STR U M E NT D IVI S I O N C O R P O R A T I O N N EWAR K...

Страница 69: ... 2A Denotes change from superseded i ssueo The slectromagnet has two series connected polarizing coils mounted diametrically opposite one another two series connected operating coils mounted diametrically opposite one another two magnetic ad justing plugs upper and lower adjusting plug clips and two locating pins The locating pins are used to accurately position the lower pin bearing which is moun...

Страница 70: ...CTIFIER 1 UNIT TAP BLOCK D UNIT CS 1 UNIT ICS UNIT Fig 1 Type K R V Re lay Without Case Front View UNIT RESISTOR Fig 2 Type KRV Relay Without Case Rear View t m a a m r E l e c t r i c a l P a r t M a n u a l s c ...

Страница 71: ...on is to insure coordination be tween the directional contact D and the I contact to prevent tripping on reversed faults where the directional contact was closed on load I n d i ca t i n g Conta c to r S w i tc h I CS The d e indicating contactor switch is a small clapper type device A magnetic armature to which leaf spring mounted contacts are attached is at tracted to the magnetic core upon ener...

Страница 72: ...The KRV relay is intended for phase fault pro tection and the directional unit has its maximum torque when the current leads the voltage by approx imately 30 The directional unit minimum pickup at its maximum torque angle is shown in Table 1 4 TABLE 1 RELAY RANGE DIR UNIT PICKUP 0 5 to 2 Amps 1 2 Volts and 2 Amps 1 4 1 2 Volts and 2 Amps 2 8 1 2 Volts and 2 Amp s 4 16 1 2 Volts and 4 Amps 10 40 1 ...

Страница 73: ...3 0 1 63 29 6 4 57 28 9 4 0 2 55 30 1 3 99 30 0 2 1 55 38 3 9 54 37 6 3 2 26 35 5 6 25 34 8 2 8 4 3 20 33 2 4 98 33 1 5 4 39 3 2 8 4 40 32 7 6 5 78 32 4 4 05 32 1 8 9 3 1 3 1 8 3 62 32 4 4 2 05 42 8 3 24 42 0 6 2 94 38 5 2 03 38 0 4 16 8 4 09 35 7 1 59 35 7 9 4 77 34 8 1 46 35 5 12 7 30 33 3 1 24 34 3 16 1 1 5 32 0 1 1 1 34 2 10 2 5 29 63 29 15 4 2 25 47 25 10 40 20 6 3 22 40 22 24 8 2 21 35 21 30...

Страница 74: ... pos ition D i rec t i o n a l U n i t D No setting is required I n d i ca ti n g Contocto r S w i t c h U n i t I CS No setting is required A u x i l i a ry S wi tch C S 1 N o setting required o n the CS 1 unit except for the selection of the required 24 48 1 25 or 250 volt age on the tapped resistor This connection can be made by referring to Fig 6 6 I N S T A L L A T I O N The relays should be ...

Страница 75: ...esired tap hole and applying rated tap value current The contact should close within 5 of tap value current Directional Unit D 1 Cont act Gap The gap between the station ary contact and moving contact with the relay in the de energized po sition should be approximately 020 2 Sen sitivity The directional unit should pick up at its m aximum torque angle current leading the voltage by 30 when energiz...

Страница 76: ...ecommended for this purpose The use o f abrasive material for clean ing contacts is not recommended because of the danger of embedding small particles in the face of the soft silver and thu s impairing the contact C al i b ra t i o n Use the following procedure for calibrating the relay if the relay has been taken apart for repairs or the adjustments have been disturbed This procedure should not b...

Страница 77: ...uster is located on the underside of the bridge and is held in place by a spring type clamp that does not have to be loosened prior to making the necessary adjustments The spring is to be adjusted such that the con tact will close when the unit is energized at its maximum torque angl e current l eading the voltage by 30 with the value of current and voltage shown in Table 1 4 The magnetic plugs an...

Страница 78: ...just the contact clearance for 3 64 by m eans of the two small nuts on either side of the Micarta disc Connect lead A to proper terminal per Fig 6 Block directional unit D and I contacts clos e and energize trip circuit with rated voltage Contacts of 10 auxiliary switch CS 1 should make as indicated by a neon lamp in the contact circuit l nd i eati n g Ca n ta cto r S w i t th I C S Adjust the con...

Страница 79: ...tact closing direction 2 8 Amp left front view screw out right magnetic plug until direction of spurious torque Magnetic is reversed Plugs If spurious torque is in the contact opening direction screw out left plug until spurious 4 16 Amp 100 Amp torque is slight contact opening 80 50 20 Amps 1 0 40 Amp 1 50 Amp 1 20 75 30 Amps 20 80 Amp t Short circuit the voltage polarizing circuit at the relay t...

Страница 80: ..._ t jJF T RM INAL AN D MOUNT I N J DEIAI L i rAA 1 0 H i E S OR C U 0 JT PANEL C UTCUT DRILL WGr FOR SEMI FLUC H MTQ PANE _ D I LLI G OR C JTO J FOR PROJF CT I ON MTGr F ONT JIE N 57 D 7902 Fig 8 Outl ine and Drilling Plan for the Type KRV Relay in the Type FT3 1 Case W E S T I N G H O U S E E L E C T R I C R E LAY I N STR U M E N T D IVI S I O N C O R P O R A T I O N N EWAR K N J Printed in U S A...

Страница 81: ...e e lectromagnet has two s eries connected polarizing coils mounted diametrically opposite one another two series connected operating coils mounted diametrically opposite one another two magnetic adjusting plugs upper and lower adjustin g plug clips and two locating pins The locating pins are used to accurately position the lower pin bearing which is threaded into the bridge The electromagnet is s...

Страница 82: ...NETIC o o ADJUSTING PLUGS DIRECTIONAL UNIT DIRECTIONAL UNit PHASE SHIFTER INDICATING __ CONTACTOR SWITCH ICS K R P OVERCURRENT TRIP CONTACT HIGH SPEED OVERCURRENT UNIT r SPARE TAP SCREW l DIRECTIONAL TORQUE CONTROL CONTACT D DIRECTIONAL TRIP CONTACT D DIRECTIONAL TORQUE CONTROL CONTACT D CURRENT POLARIZED DIRECTIONAL UNIT i II DICATING CONTACTOR l t SWITCH ICS K R D 2 m n t 0 z r 0 m n c m z t 0 c...

Страница 83: ...n of the switch When the switch closes the moving contacts bridge two stationary contacts completing the trip circuit Also during this operation two fingers on the armature deflect a spring located on the front of the switch which allows the operation indicator target to drop The target is reset from the outside of the case by a push rod located at the bottom of the IIID ICATII I_ COtiTACTOR SWITC...

Страница 84: ...ange relays the minimum pick up is 1 ampere for the cur rent polarized directional unit and 1 volt and 4 4 amperes for the voltage polarized directional unit T I M E C U R V E S The time curves for the KRD relay are shown in Fig 5 and 6 Fig 5 consists of three curves which are 1 Directional Unit opening times for current and volt age polarized 2 Directional Unit closing time for current and volt a...

Страница 85: ...ct bounce performance and should not be changed The set screw in each stationary contact has been shop adjusted for optimum follow and this ad justment should not be disturbed S E T T I N G S Overcurrent U n i t I The only setting required i s the pickup current setting which is made by m eans of the connector screw located on the tap plate By placing the con nector screw in the desired tap the re...

Страница 86: ... 28 2 1 4 2 0 0 96 28 7 6 09 2 7 8 2 5 1 25 28 7 5 04 28 1 3 0 1 63 29 6 4 57 28 9 4 0 2 55 30 1 3 99 30 0 2 1 55 38 3 9 54 37 ff 3 2 26 35 5 6 25 34 8 4 3 20 33 2 4 98 33 1 2 8 5 4 39 32 8 4 40 3 2 7 6 5 78 32 4 4 05 3 2 1 8 9 31 31 8 3 62 32 4 4 2 05 42 8 3 24 42 0 6 2 94 38 5 2 03 38 0 8 4 09 35 7 1 59 35 7 4 16 9 4 77 34 8 1 46 35 5 12 7 30 33 3 1 24 34 3 16 1 1 5 32 0 1 1 1 34 2 10 5 23 30 9 ...

Страница 87: ...10 37 1 6 84 36 8 2 5 1 46 37 9 5 90 37 4 3 0 1 92 38 4 5 34 38 1 4 0 3 06 39 6 4 7 Z 39 1 2 1 68 39 8 10 50 38 8 3 2 58 37 3 7 03 36 5 2 8 4 3 75 36 1 5 87 35 8 5 5 19 35 8 5 17 35 7 6 7 07 35 8 4 88 36 1 8 11 30 35 7 4 51 36 8 4 2 17 42 2 3 37 42 0 6 3 20 38 0 2 22 37 8 4 16 8 4 64 35 5 1 80 36 0 9 5 37 35 8 1 67 35 7 12 8 52 34 8 1 46 35 0 16 13 8 33 7 1 33 35 0 10 6 08 34 0 1 52 33 9 15 12 2 3...

Страница 88: ...75 42 0 6 10 7 1 42 0 7 45 42 0 8 18 40 42 0 7 15 4 2 86 40 0 4 45 40 0 6 4 8 3 34 0 3 34 34 0 8 7 58 32 0 2 90 31 0 44 16 9 9 09 3 1 0 2 78 3 1 0 12 14 70 30 0 2 58 30 0 16 25 00 30 0 2 40 30 0 10 10 5 30 0 2 60 30 0 15 22 0 29 5 2 40 29 5 20 37 8 29 0 2 35 29 5 10 40 24 55 2 29 0 2 30 29 5 30 84 0 28 5 2 25 29 5 40 149 0 28 0 2 24 29 5 Degrees current lags voltage 7T Voltages taken with Rectox t...

Страница 89: ...pera tion of this relay have been made at the factory Upon receipt of the relay no customer adjustments other than those covered under SETTINGS should be required A cceptance Check The following check is recommended to insure that the relay is in proper working order Overcurrent Unit I 1 Contact Gap The gap between the stationary and moving contacts with the relay in the de ener gized position sho...

Страница 90: ...d be periodically cleaned A contact burnisher S1tl82A836H01 is recommended for this purpose The use of abrasive material for clean ing contacts is not recommended because of the danger of embedding small particles in the face of the soft silver and thus impairing the contact C al i brat ion Use the following procedure for calibrating the relay if the relay has been taken apart for repairs or the a...

Страница 91: ...ated Qy a neon lamp in the contact circuit when energized with the required current The pick up of the overcurrent unit with the tap screw in any other tap should be within 5 of tap value If adjustment of pick up current in between tap settings is desired insert the tap screw in the next lowest tap setting and adjust the spring as described It should be noted that this adjustment results in a slig...

Страница 92: ... 1 This table in dicates that the spring can be adjusted when the phase angle relationship between the operating circuit and the polarizing circuit is at the maximum torque angle or when the circuit relationship has the operating and polarizing _circuits in phase 12 I i DEVICE MIIMI I CtWU 671 OIR ECTIOIAL O i ERCUlllElll liROIIIO REU Y TYPE KRP OVEICUII EMT UMIT GF TYP E UP p DIRECTIOIAL li l T O...

Страница 93: ... 64 1 64 0 Close the main relay contacts and check to see that the relay picks up and the target drops between 1 and 1 2 amperes d e To increase the pickup current remove the molded cover and bend the springs out or away from the cover To decrease the pickup current bend the springs in toward the cover R E N E W A L P A R T S Repair work can be done most satisfactorily at the factory However inter...

Страница 94: ...e In Contact Closing Direction Left Front View All Ranges 80 Spurious Torque In Contact Opening Direction Right Front View Contacts remain open PHASE ANGLE RELAT IONSH I P I lagging V by 60 TT I in phase with V I lagging V by 60 TT I in phase with V 1a leading by 40 TT In phase 1a leading 1u by 40 TT In pnase ADJUSTMENT Right Front View Plug Screwed Out Until Spurious Torque is Re versed Left Fron...

Страница 95: ...Z SCREW FOR T H I CK w L US E 190 3 51UD OIA T RMII IAL AW D MOUHT I NCI DEIAI LC DIA 4 0LE S FOR 1 90 32 MT OCR EWS PANEL CUTOUT t DRILLIWGo FOR SEt 1 f L J C H MTQ PANEL DRILLING OR CUTOUT PROJ C T ON MTC r FRm lT 1 EW TERMINAL N UMeER 57 D 7902 Fig JO Outline anJ Drilling Plan for the KRP KRC anJ KRD Relays in the FTJ J Case 15 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 96: ...W E S T I N G H O U S E E L E C T R I C C O R P O R A T I O N R E LAY I N STR U M E NT D IVI S I O N N EWAR K N J Printed in U S A w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 97: ...SEDES I L 4 1 1 37 3 Denotes change from superseded i ssue The cylinder unit consists of three basic assem blies an electromagnet assembly a moving element assembly and a stationary closing assembly The electromagnet assembly consists of an elec tromagnet an adjustable magnetic core two magnetic adjusting plugs lower bearing pin and a die casted aluminum frame The moving element assembly con sists...

Страница 98: ... line as shown in Fig 4 In such a connection the relay operates to disconnect the line for ground faults of a definite magnitude that are flowing in a specified direction 4 The directional unit of the relay compares the phase angle between the fault current and the polari zing quantities of the system and either produces a contact closing torque for faults in the trip direction or produces a conta...

Страница 99: ...f pickup P 3 6 0 5 Entering the curve in Fig 6 at multiples of pickup equal to 6 the closing time for the overcurrent is 14 ms However the total operating time for the overcurrent unit is 14 plus 4 ms which is the opening time of back contacts of the directional unit or 18 ms total operating time for the overcurrent unit The total operating time for the directional unit is 33 ms and since this is ...

Страница 100: ...Rating Amperes Condition Crnccoc tOip loch PIog m Adjustment All Range r JO Sp ious rque in con Right front view 4 do iog dicwioo left front view All Ranges ISo Spuri que in Plug Screwed out until spurious tor que i s reversed Left front view 0 E a z t _ x _____ contact opening di PIug screwed out rection Right front until spurious tor view Contact que is in contact remain Open closing directions ...

Страница 101: ...the line CAUTION Since the tap block connector screw car ries operating current be sure that the screw is turned tight In order to avoid opening the current transformer circuits when changing taps under load connect the spare tap screw in the desired tap position before removing the other tap screw from the original tap position ENERGY REQUIREMENTS BURDEN DATA OF OPERATING CURRENT CIRCUIT 60 CYCLE...

Страница 102: ...nd then turning the proper nut with a wrench For detailed information refer to I L 4 1 076 A D J U S T M E N T S A N D M A I N T E N A N C E The proper adjustments to insure correct opera tion of this relay have been made at the factory Up on receipt of the relay no customer adjustments other than those covered under SETTINGS should be required Acceptance Check The following check is recommended t...

Страница 103: ...POL POLAR I Z I NG CURRENT Iop OPERAT I N G CURIUNI 9 ANGLE BV W H I C H lop LA dS EpQL I ANGLE BY WHI CH l _OP L AGS Ipo r UNIT CLOSiNG TIMES A CURRENT 1 VOLTAG E OR DUAL POLARIZED K Bl VOLT V O LTAGE P O L AR I ZED r r 1 DIRECTIONAL UNIT OPENING TIMES ARENT VOLTAGE OR DUAL POLA RIZ ED I I I I I 4 5 6 1 1 9 10 20 30 40 so 10 10 100 200 300 400 100 100 1000 2000 sooo MULTIPLES OF PRODUCT PICKUP Fi...

Страница 104: ...ationary 1 0 contact in position 3 The sensitivity adjustment is made by vary ing the tension of the spiral spring attached to the moving element assembly The spring is adj usted by placing a screwdriver or similar tool into one of the notches located on the periphery of the spring ad juster and rotating it The spring adjuster is located on the underside of the bridge and is held in place by a spr...

Страница 105: ... in the slots in the bottom of the cylinder unit 6 P l ug Adj ustment Apply current to terminals 8 and 9 with all other terminals open circuited Plug adjustment is then made per Table II such that the spurious torques are reversed The plugs are held in position by upper and lower plug clips These clips need not be disturbed in any manner when making the necessary adj ustment I ndi cating Contact S...

Страница 106: ...I LLIRG FOR SO ti FLUSII MT PAIIEL DRI LLING OR CUTOUT FOR PRO If CTIOR NTG FROIIT V I EW D I A HOLES FOR 190 32 MT SCIDS 1 II DIA 2 NOlES TE1141Ul IIUM8ER 57 D 7902 Fig 7 Outline and Drilling Plan for th e Type KRD 4 Relay in the FT3 1 Case WESTINGHOUSE ELECTRIC CORPORAT I ON RI LAY INSTRUMI NT DIVISION N I WAR K N J Printed In U S A w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 107: ...s S e ns i t j i t y with 2 v olt s l i n a t o l i n e for any t a p i s d e f i n e d by t h e fo l lowin equa t i o n I S S Amner e s 1 D _ C h _ VD I l 3 r I T l S 2 l C e j _ ct c t e l S v l C l c lf 1 e e tJ l G _ 1 6 S2fll as pe L L o i 1r 1 1 l T 8 I o r ra c ic rioi __ _ t _e u 1 C vE ric s fro 1 10 2 0 c c e ct o __ t _ 0 1lue for a T s et t i ng of 8 7 a nd 7 5 d ezre e s t o 1 1 5 per...

Страница 108: ... w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 109: ... lld b 2 7 5 2 92 2 ITipS Rout ine Ma int ena n c e a s per I L 41 491 4A l i Jtot r2 r sfo r o C h s c a s p I L 41 49l l D exc e Jt t h e voJ t c g e drc o ro r 1A ir c r 1 rc___ ta s c o t sr i Jc l s s hould read 66 6 6s 6 71 0 6 le 6 volt s 1 volt I h i s volt a g e i s c or 1pu v e d 3 fol J c s lOO c 2j3 1 t h e sum of valu bet re en R le J d a nd t h e t p b e i r g l i lsured Ex a raple 1...

Страница 110: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 111: ...per I L 4l 491 4A exc ept us e following pickup 1imitsi 0r r p ss un it v1TC 2 c L and v 2F3F 10 volt s I lin 30 volt s I 1ilax 1 2 2 a 1 5 8 f o r KD lr for KD J_ l 3 42 a KD 4 3 50 a KI 41 ___________ __ _ _ v___ __________ __ __ ____ _ _ _ _ __ ____ _ _ _ fi ____ c I 70 volt s 7 1 5 7 7 a both relays Limit s for P 3 s 6 t o Pha s s unit t i c F Q Lfo t z i E L __ 5 6 7 5 0 48 52 30 2 80 3 00 70...

Страница 112: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Страница 113: ... 6 __ L LII II_ 06 I I I 0 06 0 0 2__l I j I I i l I I I l I 1 i 1 l I I i l I 1 2 7 c c 2 1 1 2 o c t J 2 I 5 o J r f 1 1 1 nn 16 9 I 2 5 1 I t 1 0 1 1 1 f _ __ __ _ L U c t i__ 2_ t_ u _ _ 2U 0 v j l _ 1 _1_ __ __ _ 1 i i i I j i I I i i 1 I H I l I I i 1 r r r I t I r l r l l j l l 1 I I J L e Lu _2_ 0 _ 3 6 tO JLJ_J 12 1 7 1 1_ 1_ __l 26 1 _Q_ 0 0 J 0____1 i I 1 j l I l l l 1 I c l 1 j J I r I...

Страница 114: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

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