GE 12CEY 51B Instructions Manual Download Page 19 | Manualshive

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Courtesy of NationalSwitchgear.com

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Summary of Contents for 12CEY 51B

Page 1: ... Check figure 1 of this insert booklet for the contact circuit arrangement These instructions do not purport to cover all details or variations in equipment nor to provide for every possible contingency to be siet in connection with installation operation or Maintenance Should further inforsiation be desired or should particular problems arise which are not covered sufficiently for the purchaser 1...

Page 2: ... SI 0 i R f URI3 LnnnJ TR 01 2 R2I 03 1 AOPER C2I TR 02 3 Rjuun 02Z3 VOPER 023 JRI2 R22 C22 TR 01 2 TR 03 1 TR 02 3 TR 01 2 TR 03 1 TR 02 3 3 r Ax Ax l i V M l w v V V V 7 0 5 I o O o o 8 10 6 2 X SHORT FIBBER 01 2 TOP UNIT 02 3 MIDDLE UNIT 08 I BOTTOM UNIT FIG I 0227A7013 0 Internal Conm ctions Diagram For The CEY51B Relay Front View BC 12 98 100 GENERAL ELECTRIC METER AND CONTROL BUSINESS DEPT M...

Page 3: ...GEK 1275K INSTRUCTIONS MHO DISTANCE RELAY TYPE CEY51A GE Protection and Control 205 Great Valley Parkway Malvern PA 19355 1337 Courtesy of NationalSwitchgear com ...

Page 4: ...cal Checks Mho Unit Electrical Tests Target Seal in 14 14 15 18 18 INSTALLATION PROCEDURE Location Mounting Connections Visual Inspection Mechanical Inspection Portable Test Equipment Electrical Tests on the Mho Units 18 18 18 19 19 19 19 22 INSPECTION Target Seal in Unit Mho Units 22 22 23 PERIODIC CHECKS AND ROUTINE MAINTENANCE Contact Cleaning 23 23 SERVICING 23 Control Spring Adjustments Ohmic...

Page 5: ...arrier schemes When applying this relay for the protection of a given circuit i t is advantageous to set the relay on the highest basic minimum reach tap that will accomodate the desired reach setting operating torque level For first zone applications the relay may be set for as much as 90 of the distance to the remote terminal This will ensure the highest possible Since all forms of the CEY51A re...

Page 6: ...rent schemes including straight distance protection directional comparison carrier protection permissive overreaching permissive and di rect underreaching transferred tripping and many different back up schemes Figure 3 illustrates the external connections to the CEY51A when used in conjunction with a CEY52A a CEB52 A and an RPM21D for three zone protection of a transmission line against all multi...

Page 7: ...0 9 Percent Tap Setting Z Minimum Ohms 1 5 Z Zsec 2 19 ohms 0 80 50 The selection of the maximum torque angle for a first zone relay should depend primarily on accommodation of arc resistance Smaller maximum torque angles will accommodate more arc resistance than larger maximum torque angles Since arc resistance is independent of line length the shorter lines will provide the greatest problem on t...

Page 8: ...ms of arc resistance for a fault at the ori gi n A rough estimate of the arc resistance that a relay will see for a multi phase fault is given by RA 3 130 where 130 three phase fault current flowing in the relay Since the minimum three phase fault current in the relay for a close in fault was given as 11 amperes the maximum arc resistance is 0 27 secondary ohms RA 11 The 60 relay setting will acco...

Page 9: ... units can be adjusted in 1 steps over a 10 1 range for any of the basic minimum reach settings listed in Table II by means of autotransformer tap leads on the tap blocks at the right side of the relay CONTACTS The contacts of the CEY51A relay will close and momentarily carry 30 amperes DC However the circuit breaker t r i p circuit must be opened by an auxiliary switch contact or other suitable m...

Page 10: ...nimum reach of the unit for a particular tap setting of the transactor TR 0I _2 primary Assuming finite values of E and IZT1 TE the balance point torque 0 will occur where cos 0 that is where the angle P is 90o The locus of the terminus vector TE Point A in Figure 5 that will cause the angle to be always 900 in a circle passing through the origin and with the vector IZT1 as a diameter B Considerin...

Page 11: ... adjusted to have correct directional action under For faults in the non steady state low voltage and low current conditions tripping direction the contacts will remain open at zero volts between 0 and 60 For faults in the tripping direction the unit will close its contacts amperes between the current limits in Table IV for the three basic minimum reach settings see Table I I at the voltage shown ...

Page 12: ... setting regardless of the tap setting However under dynamic conditions when the memory action is effective Figure 2 shows that an mho unit with a 3 ohm basic minimum reach and 100 tap setting will operate if 130 is greater than 1 5 amperes Transient Overreach The operation of the mho unit under transient conditions at the inception of a fault is important because the relay is normally connected s...

Page 13: ... phase to neutral impedance expressed in secondary terms is determined by the following equation Tap Setting 100 Min Ohms Setting Cos 0 9 Z where Angle of maximum torque Power factor angle of fault impedance 9 0 Example 1 TAP SETTING DESIRED 91 Set one end of jumper lead to 95 Set the other end to 5 Set 1 on 1 Note the 4 setting of the 0 to 5 winding subtracts from the 95 setting Example 2 TAP SET...

Page 14: ...IT 9 8 0 89 8 7 Polarizing 1300 j680 4 5 4 5 1 0 3200 JO Restraint The restraint circuit burden and hence the total relay burden will decrease when the restraint tap setting is less than 100 The potential burden at tap settings less than 100 can be calculated from the following formula a jb c jd Tap Setting 2 VA 100 The terms a jb c jd etc represent the burdens of the mho unit potential circuit ex...

Page 15: ...ews holds the connecting plugs in place The target reset mechanism is part of the cover assembly The relay case is suitable for either semi flush or surface mounting on all panels up to two inches thick and appropriate hardware is available However panel thickness must be indicated on the relay requisition in order to make sure that proper hardware will be included A separate testing plug can be i...

Page 16: ...ined in shipment and that the relay calibrations have not been disturbed indicates that readjustment is necessary refer to the section on SERVICING I f the examination or the test VISUAL INSPECTION Check the nameplate stamping to make sure that the model number and rating of the rel ay agree with the requisition Remove the relay from its case and check that there are no broken or cracked molded pa...

Page 17: ...0 and position the restraint taps according to Table XII in its upright position Use the following procedure in checking each unit With the current set at 5 amperes and the voltage across the relay voltage studs at 120 volts set the phase shifter so that the phase angle meter reads the value shown in Table IX for the unit being tested that is so current lags voltage by an angle equal to the angle ...

Page 18: ...000 90V 14 5 15 4 Top 01 2 3 0 100 14 15 13 16 17 5 Middle 02 3 3 0 100 13 16 17 18 19 20 7 Bottom 03 1 3 0 100 18 19 20 14 15 9 7 9 5 6 8 10 3000 45V 29 1 30 6 6 8 10 3000 45V 29 1 30 6 6 8 10 3000 45V 29 1 30 6 75 100 75 100 75 100 14 15 13 16 17 5 13 16 17 18 19 20 7 18 19 20 14 15 7 Top 0l 2 Middle 02 3 Bottom 03 1 9 9 5 c Ohmic Reach With the relay still connected as shown in Figure 10 make c...

Page 19: ...he angle of maximum torque impedance characteristic in Figure 6 shows that the ohmic reach of the unit should be the same at both 330 and 2700 and should be 0 866 times the reach at the angle of maximum torque TABLE X ANGLE OF MAXIMUM TORQUE ADJUSTMENT TABLE 0 Anqle Meter Reading Connect Leads to Relay Reach Restraint Jumper Pickup Angle of Relay Studs Test VA B Set At Studs as Follows Tap Tap Uni...

Page 20: ...ng MOUNTING The relay should be mounted on a vertical surface drilling dimensions are shown in Figure 14 The outline and panel CONNECTIONS The internal connections of the CEY51A rel ay are shown in Figure 9 elementary diagram of typical external connections is shown in Figure 3 An VISUAL INSPECTION Remove the relay from its case and check that there are no broken or cracked component parts and tha...

Page 21: ...nd other equipment are similar to the schematic connections shown in Figure 12 except that the Type XLA test plug connections are now included Use of the source impedance R jXS simulating the conditions that would be encountered in practice is necessary only if the relay is to be tested for overreach or contact coordination which are not normally considered necessary at the time of installation or...

Page 22: ...21 0 934 0 951 24 88 87 12 86 6 85 3 83 2 81 1 78 0 5 From Table XI i t is seen that the angle of the impedance of the 6 ohm tap is Therefore 860 200 X 3 cos 86 60 5 4 ohms 2 Z relay 100 The calibration curve for the portable test reactor should again be referred to in order to determine the exact reactance of the 6 ohm tap at the current level being used For the purpose of this illustration assum...

Page 23: ...in the case of the previous tests the load box that serves as the source impedance should be adjusted to allow approximately 10 amperes to flow in the fault circuit when the fault switch is closed Tap When checking the mho unit at angles of more than 300 off the maximum reach This is position the error becomes relatively large with phase angle error apparent from Figure 11 where it is seen for exa...

Page 24: ...ho unit at low currents This effect is shown in Figure 2 Determine the impedance and phase angle seen by the relays The calculated value should take into A shorter test that will check for most of the possible open circuits in the AC portion of the relay can be accomplished by disconnecting the current circuits This can be done by removing the lower connection plug All units should have strong tor...

Page 25: ...e of maximum torque adjustment X13 03 1 NOTE Before making pickup or phase angle adjustments on the mho units the units should be allowed to heat up for approximately 15 minutes energized with rated voltage alone and the restraint tap leads set for 100 Also it is important that the relay be mounted in an upright position so that the units are level CONTROL SPRING ADJUSTMENTS Make connections to th...

Page 26: ...e relay as show in Figure 10 Set the restraint tap and the basic minimum reach taps in the positions shown in Table IX With current at 5 amperes and voltage at 120 volts set the phase shifter so that the phase angle meter reads the angle shown in the table for the unit to be checked Now reduce the voltage VAB to the set value shown in Table IX and adjust the appropriate rheostat so that the unit p...

Page 27: ... have a secondary effect on the reach of the unit and vice versa Therefore to ensure accurate settings it is necessary to recheck the reach of a unit whenever its angle of maximum torque setting is changed and to continue a cross adjustment routine of reach and angle of maximum torque until both are within the limits specified above As noted in Table II Under the section on RATINGS the angle of ma...

Page 28: ...cuited on itself the contacts must remain open over the range of 0 30 amperes Should the MB unit fail to pass either test the core must be adjusted The core and coil assembly is shown in Figure 1 By use of a special wrench 0178A9455 Pt l the core may be rotated 360 in either direction without having either to hold nut F or to retighten any parts after the final position of the core has been determ...

Page 29: ...MHO Unit in the CEY51A Relay Figure 8 8025039 Cross Section of Case and Cradle Block Showing Auxiliary Brush and Shorting Bar Figure 9 0178A7132 1 Internal Connection Diagram of the CEY51A Relay Front View Figure 10 0195A4991 1 Test Connections for Checking the Correct MHO Unit Operation Figure 11 0195A4492 Diagram Showing Reach of the MHO Units at Angle of Test Reactor Figure 12 0195A4994 MHO Uni...

Page 30: ...OUNIT ANGLE Of MAXIMUM TORQUE C60 LA i U L ii V i 90 it ii tt it tr i STEADY STATE CHARACTERISTIC DYNAMIC CHARACTERISTIC T MHO RESTRAINT TAR SETTING y THREE PHASE FAULT CURRENT Z I KTO U TT I I t lli lr i I 1 ii r 1 t H titi t u H m T t HT s ii i i fU r y j l 50 limit nt is miminim itmSfiililuttiuuimu T IF l T lOO 1 u i 1 o l t t 44 4 44t T 50 mi 40 ii ii ff 5 ii T 25 o II UJ Hi SO 1 Hi L 1it ttr ...

Page 31: ... r 10 20 1 14 6 CETvICEl DEVICE I NCI L M 0E5CS PTION 5Q NC TYPE TSI 21 Zl CFY 51A 1 3 PUACE 1ST CNF MHO RFIAY rt ix 0 1 2 M LTC TRl 2 I FHASE 1 2 TRANSACTOR 3L T 5Q r si TX 0 ETC RED 13 13 19 16 TARGET 4 SEAL IN JNIT MSI LAMP 3 PMAS 2ND ZONE MHO RELAY 21 Z2 i CEY52A HASE 1 2 UNIT ETC 1 1 2 11 11 11 ZI 2ix TARGET j FAI i fj ilNiT T A SI 7 21 Z3 3 PHASE 3R0 ZONE OFFSET MHO RELAY CE5S2A 21 Z2 TST T ...

Page 32: ...S 3 1 FRONT 5 Ft 3 R21 1 i 0 TR B OPER n Rll 01 2 w 9 5 E12 C21 15 OPER E B 1 POL POL TR 01 2 F h A 1 X2 X 2 Y T Figure 4 0195A4986 1 Schematic Connections of MHO Units in the CEY51A Relay Top View 30 Courtesy of NationalSwitchgear com ...

Page 33: ...WracTOP MGLE TT li Figure 5 0195A4987 Graphical Representation of MHO Unit Operating Principle 8 x 60 SETTIHG 0 75 0H S 7 e 5 4 3 1 8 OHMS 1 II I 4 Figure 6 0195A4988 Steady State Impedance Characteristic of the MHO Unit in the CEY51A Relay 31 Courtesy of NationalSwitchgear com ...

Page 34: ...503 2 5 Ui Z SETTING r I Z FAUG Z SETTING 25 o z 2 0 x l FAJLT 4 31 os a Z SETTING UJ p CL O J t I i 4 V 1 0 I 4 f t i t i B 4 i 1 4 4 I t t t r 4 4 1 I t 4 I 4 4 4 I 4 T i 5 t w f I 4 g EV iiSil 4 4 4 4 4 4 t 1 t r i I i 4 i ti t t 4 1 1 mi i mi t T 4 4 nil i t 4 A 1 4 tit I t It 4 mo t M I tin HI I I 1 t H t i t r t H t i ii 4 I I 4 f t I i i i i H I i l 4 I F F ti f i t M t f i I i i f o M 10 2...

Page 35: ...0 CD CO o 0 c h C J 00 O zr 3 O m OJ 7 l CD O 3 h CO Q rv o on 0O CD 3 CO o n AUXILIARY BRUSH TERMINAL BLOCK SHORTING BAR 3 C Cu 3 3 Q CQ O CD 3 CD CD 3 Q NOTE AFTER ENGAGING AUXILIARY BRUSH CONNECTING PLUG TRAVELS 1 4 INCH BEFORE ENGAGING THE MAIN BRUSH ON THE TERMINAL BLOCK CD CD O O XT 00 zr o 3 cO ...

Page 36: ... u TR till 03 1 1 13 01 AOPER 03 1 AOPER 02 3T 3 1 01 2 C2 TR 02 3 02 3 AOPCR r22 Ht Rl2 C22 TR01 2 TR 03 1 TR 02 3 TR 01 2 TR 03 1 TR 02 3 o 02 o 03 r O O OH r r y y y y y y t 1 V V 3 0 9 o o 2 8 10 01 2 TOP UK IT 02 3 MlDOLE UNIT 03 1 BOTTOM UNIT SHORT FINGER Figure 9 0178A7132 1 Internal Connection Diagram of the CEY51A Relay Front View 34 Courtesy of NationalSwitchgear com ...

Page 37: ...E VOLTAGE CONNECT LEAD TO RELAY STUDS AS FOLLOWS JUMPER RELAY STUDS UNIT LOCATION UNIT LEAD D LEAD A LEAD B LEAD C 6 8 10 7 5 TOP 01 2 14 15 13 16 17 6 8 10 9 18 19 20 7 MIDDLE 02 3 13 16 17 6 8 10 5 03 1 14 15 BOTTOM 18 19 20 9 Figure 10 0195A4991 1 Test Connections for Checking the Correct MHO Unit Operation 35 Courtesy of NationalSwitchgear com ...

Page 38: ...GEK 1275 TWICE UNIT REACH AT TEST REACTOR ANGLE ZMIN Rl TAP R Figure 11 0195A4992 Diagram Showing Reach of the MHO Units at Angie of Test Reactor 36 Courtesy of NationalSwitchgear com ...

Page 39: ...MPER RELAY STUDS UNIT CONNECT LEAD TO RELAY STUDS AS FOLLWS LOCATION LEAD A UNIT LEAD B LEAD C LEAD D 0 1 2 TOP 14 15 13 16 17 6 8 10 5 7 0 2 3 13 16 17 MIDDLE 18 19 20 6 8 10 9 7 03 1 18 19 20 6 8 10 5 9 BOTTOM 14 15 Figure 12 0195 A4994 Mho Unit Test Connections 37 Courtesy of NationalSwitchgear com ...

Page 40: ...T 11 19 12 20 TOP TEST PLUG fi 04 04 4 K3 A uA 8 3 uA U 1 04 T I i 3 A 6 S o in 04 9 3 O A O G C 0 04 I I rd I 5 m c CO 9 S m s LT CO o 1 0 2 BOTTOM TEST PLUG 9 OC A 04 4 04 o I 1 8 r i l10 J i 8 S o 8 O 1 04 c rd oc iS fi m ir ST A B 15 8 z tO in m is r CO A CO 1 n Q O cj 11 19 CONNECTIONS TO PHASE ANGLE METER TO CHECK PHASE 2 CURRENT AND PHASE 2 3 VOLTAGE Ui o 12 20 TOP TEST PLUG O Ui 3 O LU Ui ...

Page 41: ...LES O O 0 O 16MM 5 8 9 8 7 5 251MM 937 252MM 7 7 8 1 1 9 8MM 1 7 5 4 4MM 6 7 5 171MM L f L i i _ c 1 3 5 0 ItL _ 342MM 1 9 5 0 I 24lMM ifTi H x 0 0 t i 3 5 0 0 f F 19 75 502MM 15 562 396MM CUTbUT 1 9 8 7 5 5 0 4MM 8 8MM I i f 4 1 4 6 8 3 7MM 718 18MM 250 2 8 4 3 7 2MM 6MM 5 0 0 2 1 8 218 5 2 5 12MM TYPICAL 5MM 5MM 1 3 3MM 5 6 8 7 3 4 DRILL 2 0 HOLES 19MM 144MM PANEL PANEL DRILLING FOR SURFACE MOUN...

Page 42: ...å å å å 3RZHU 0DQDJHPHQW 215 Anderson Avenue Markham Ontario Canada L6E 1B3 Tel 905 294 6222 Fax 905 201 2098 www ge com indsys pm Courtesy of NationalSwitchgear com ...

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