GE 12CEYG51B(-)D, Instructions Manual

Page 1: ...relay contacts are no longer protecect by a ei n unit the contacts must never inte rut curren or carv trip current for more than 16 milliseconds These instructions do not purport to cover all details or variations in equipmtnt nor to provide for every possible contingency to be met in connection with installation operation or maintenance Should further information be desired or should particular p...

Page 2: ...169 cV Bb vi2 0 M3 A 1 57 M1TOP UNIT M2 MIDDLE UNIT SHORT FINGER M3 BOTTOM UNIT FIG 1 0246A3351 O Internal Connection Diagram For The CEYG51B D Relay B Ml A 1 4 6 8 10 GENEtAL ELECTRIC COMPANY PHILADELPHIA PA ...

Page 3: ...GEK 26423D INSTRUCTIONS GROUND DISTANCE RELAY TYPE CEYG51A GE Protection and Control 205 Great Valley Parkway Malvern PA 19355 1337 ...

Page 4: ...ks 11 Electrical Checks 11 PORTABLE TEST EQUIPMENT 11 SERVICING 14 Restraint Circuit Angle Adjustment 15 Directional Characteristic 15 Maximum Torque Angle 15 Pickup 15 Clutch Adjustment 15 RENEWAL PARTS 16 APPENDIX I MINIMUM PERMISSIBLE REACH SETTING FOR THE CEYG51A 17 No Zero Sequence Current Compensation 17 With Zero Sequence Current Compensation 18 APPENDIX II MAXIMUM PERMISSIBLE REACH SETTING...

Page 5: ...ck are required at each terminal These relays operate in conjunction with a carrier channel to provide high speed protection against all single phase to ground faults in the protected line section One relay acts to stop carrier and trip for internal faults while the other initiates carrier blocking on external faults If zero sequence current compensation is used on the carrier stopping and trippin...

Page 6: ...51A relays covered by these instructions are available with potential circuits rated for operation on wye wye connected potential transformers which supply secondary voltage of 120 volts phase to phase Current coil ratings and ohmic ranges are as tabulated below BASIC MIN RANGE CONTIN ONE SEC OHMIC REACH OHMIC REACH CURRENT RATING CUR RATING N OHMS p N OHMS AMPERES AMPERES 1 2 3 1 30 5 225 0 5 1 0...

Page 7: ...he CEYG51A relay may be represented on the R X impedance diagram as shown in Fig 7 It should be noted that these steady state characteristics are for rather specific fault conditions described below The mho unit has a circular characteristic which passes through the origin of the R X diagram The diameter passing through the origin defines the angle of maximum torque of the unit which occurs when l...

Page 8: ...polarizing potential will remain quite high with the result that the relay will operate at considerably less current than tabulated For example with a one percent restraint voltage and 120 volts polarizing the unit will operate with less than 1 ampere operating current for the 3 ohm minimum reach setting OPERATING TIME For typical operating time characteristics see Figure 13A and 13B BURDEN The bu...

Page 9: ...n in the application for incorrect operation on faults behind the relay terminal a When zero sequence current compensation is iQi used if Co is equal to or less than C no further evaluation need be made See Appendix II equations Ha lIb and lIc b When zero sequence current compensation is used if 3K 1 Co is equal to or less than C no further evaluation need be made See Appendix III equations lila I...

Page 10: ...or the three ohm basic reach settings K 300 Thus for this basic tap setting the restraint tap I should be no larger than I 0 204K 61 percent Consider now a ground fault at Fl immediately behind the relay Appendix II indicatos the approach to calculate the maximum safe reach setting to eliminate the possibility of an incorrect operation on single or double phase to ground faults at this location As...

Page 11: ...maximum safe reach setting when using zero sequence current compensation CONSTRUCTION The Type CEYG51A relay consists of three mho type 4 pole induction cylinder units Each unit has an associated tapped autotransformer for controlling reach and adjustable resistors in the polarizing and restraint circuits for adjustment of angle and basic minimum ohmic reach Figures 1 and 2 show construc tion deta...

Page 12: ...on the seal in contacts With the cover fastened securely in place check that the target resets positively when the reset button at the bottom of the cover is operated 7 Check the location of the contact brushes on the cradle and case blocks against the internal connection diagram for the relay Be sure that the shorting bars are in the proper locations on the case blocks and that the long and short...

Page 13: ... that the ohmic reach of each unit is witifl 14 percent of the minimum reach as given on the nameplate These checks should be made with the E taps set at 100 percent and the voltage adjusted for the value shown in Table IV for the specific ohmic range and with the relay connected as shown in Figure 10 Set the phase shifter so that current leads voltage by 30 degrees check that the current required...

Page 14: ...ompletely deenergized 2 Examine the contact surfaces for signs of tarnishing or corrosion Fine silver contacts should be cleaned with a burnishing tool which consists of a flexible strip of metal with an etched roughened surface Burnishing tools designed specially for cleaning relay contacts can be obtained from the factory Do not use knives files or abrasive paper or cloth of any kind to clean re...

Page 15: ... to just close its contacts is given by equation 12 Z 1 cos 60 0 Tap z 100 12 L where Ohmic reach of the mho unit See Equation 5 in CHARACTERISTICS section ZL Test impedance in ohms 0 Angle of test impedance The portable test reactor Cat No 6054975 and test resistor Cat No 6158546 are normally sold as a set identified by a calibration curve number shown on the nameplate The test resistor taps have...

Page 16: ... similar approach can then be taken using a 300 combination of reactor resistor taps If a four wire test source is not available the mho unit characteristic can then be checked using a three phase three wire test source and the test circuit of Fig 17 Following the same procedure outlined above for the four wire test circuit the only difference in results if a 30 shif in the mho characteristic With...

Page 17: ...nit fails to perform properly at high current levels as outline under ACCEPTANCE TESTS the inner stator or core must be readjusted This can be accomplished by means of rotating the core slightly clockwise or counterclockwise as required to make sure that the contacts close and remain closed within specified currents with the special core adjusting wrench Cat No 0178A9455 Pt 1 See Fig 12 MAXIMUM TO...

Page 18: ...tock to enable the prompt replacement of ny that are worn broken or damaged When ordering renewal parts address the nearest Sales Office of the General Electric Company specify quantity required name of the part wanted and give the General Electric Requisition number on which the relay was furnished 16 ...

Page 19: ...ent compensation is NOT used the effective impedance as seen by the relay on the faulted phase for a single phase to ground fault at the far end of the line is z Z 1 C 0 ZI 1 2C C I o a Ia where Z 1 Positive sequence impedance of the protected line Z 0 Zero sequence impedance of the protected line Z Total zero sequence mutual impedance between protected line and parallel line I Zero sequence curre...

Page 20: ...es to I as well as l WITH ZERO SEQUENCE CURRENT COMPENSATION When zero sequence current compensation is used the effective impedance as seen by the relay on the faulted phase for a single phase to ground fault at the far end of the line becomes Zom o Z 1 1 a where Xo Xl K 3X 1 The per unit ratio of zero sequence current to be used for compensation To insure that the relay on the faulted phase pick...

Page 21: ...of the units to prevent them from picking up on reverse double phase to ground faults Equation Jic gives this limit K C C T 3Z 0 Cos 0 60 lic where K Design Constant 100 for 1 0 basic minimum tap 200 for 2 0 basic minimum tap 300 for 3 0 basic minimum tap 0 The angle of the system zero sequence impedance Z 0 All other terms are defined above Note that C 0 and C in equation Tic have the same values...

Page 22: ...n the non trip direction K L3K 1 C 0 C T Cos 9 60 IlIc 3Z 0 where Xo XI K 3X The per unit ratio of zero sequence current to be used for 1 compensation All other terms are as defined in Appendix II If the minimum permissible tap setting includinq suitable margins as determined from equations lila iIb or IlIc above are positive and greater than the maximum permissible tap setting as determined fron ...

Page 23: ...GEK 26423 RESTRAINT TAP BLOCK Ml UNIT M2 UNIT M3 UNIT FIG 1 8039015 RELAY TYPE CEYGS1A OUT OF CASE 3 4 FRONT VIEW TARGET SEAL IN UNIT P11 21 ...

Page 24: ...GE K 2 6423 SftECTORS N FIG 2 8043301 RELAY TYPE CEYG51A GIlT OF CASE 3 4 REAR VIEW BASIC MINIMUM TAP 22 ...

Page 25: ...B B A 0 NIl 2 Q j M3 AçA a 0 a 6 8 10 1 TOP HT 12IDDLE UNIT SHORT FINGER r3 SQTTOM UN T FIG 3 0178A9106 1 INTERNAL CONNECTIONS DIAGRAN FOR THE CEYG51A RELAY GEK 26423 15 17 19 ii 13 1 TI1 T 23Ts1 Ml 1 2 4 23 ...

Page 26: ... 10 OF PIE CEY CEYG iT J3 FOP CARRIER TO TPAIISFERPED TRIPPING OR STARTING DIRECTIONAL AUXILIARIES CCPAPISON TABULATION OF DEVICES IN L DEVICE INTEPAL OUTLINE C 51 O178ASO6 017NA7336 efI BT EN ST S 4 A N 4 PEThEEN T DS 3 1 j367A02660 2 36726G2 C2O7AI 465 A 7 ARE A4E 1 IDE TRY N EXT J N4 2 E S I CFPO6A 0127A94NN K 9272 LD RE F I AAJA _BUN 4 NASXI EXT AliT IE USING CURRENT POL ARIZATION USE TNt CCA ...

Page 27: ...GEK 26423 FIG 5 0208A5544 O TYPICAL TRANSMISSION SYSTEM 138KV I 38KV H 30 MILES F I2MILES H F2 J Ft 36 MILES I 38KV 25 ...

Page 28: ...GEK 26423 FIG 6 0208A5545 O TYPICAL SCHEMATIC OF MHO UNIT BACK Io E 23 IN FRONT 26 ...

Page 29: ...GEK 26423 x R SHADED AREA S TRIPPING AREA FIG 7 0208A5543 O TYPICAL R X DIAGRAM OF MHO UNIT M1O UNIT 27 ...

Page 30: ...GK 264 23 C A FIG 8 0208A5541 Q TYPICAL RELATION OF I E 8 c AND 28 B ...

Page 31: ...ARITY TEST FIG 9 0127A9562 1 POLARITY TEST GEK 26423 2 1 3 TER1IINALS UNIT r Mi M2 M2 15 15 16 16 17 17 18 18 18 18 18 18 16 16 17 17 15 15 17 17 15 15 16 16 4 10 6 10 8 10 3 95 9 7 9 67 VOLTS RES 10 ft 29 ...

Page 32: ...GEK 26423 FIG 10 0195A4970 o Sh 4 TYPICAL TEST CONNECTIONS DIAGRAM 03 2 S t A R S C FIGURE 7 D 30 ...

Page 33: ...NGAGING AUXILIARY BRUSH CONNECTING PLUG TRAVELS 1 4 INCH BEFORE ENGAGING THE MAIN BRUSH ON THE TERMINAL BLOCK FIG 11 8025039 CROSS SECTION DRAWOUT CASE SHOWING POISITION OF AUXILIARY BRUSH CONNECTING BLOCK MAIN BRUSH _J L AUXILIARY BRUSH TERMINAL BLOCK 31 ...

Page 34: ...GEK 26423 FIG 12 0208A3583 O CURE ADJUSTMENT A A INNER STATOR OR CORE B MAGNET A COILS C WAVE WASHERS D OCTAGON NUT FOR CORE ADJUSTMENT E FLAT WASHER F CORE HOLD DOWN NUT HEXAGON F 32 ...

Page 35: ... 13A 0273A9031 O TYPiCAL TIME CURRENT CHARACTERISTIC WHEN TYPE CEYG51A IS USED WITH ZERO PERCENT COMPENSATION GEK 26423 4 0 3 5 1 0 0 5 3fLTAP 0 2 ft TAP 0 15 IJI TAP 0 15 5 22 5 0 15 20 25 30 30 75 45 AMPERES 30 37 5 60 45 90 33 ...

Page 36: ...0273A9030 O TYPICAL TIME CURRENT CHARALTERISTIC WREN TYPE CEYG51A IS USED WITH 50 PERCENT COMPENSATION GEK 26423 4 0 3 5 3 0 LI 4 Lfl w j Q 2 O z Lii I 1 5 l 0 0 5 3J1TAP 0 2 fl TAP 0 IJLTAP 0 5 7 5 I0 15 15 I5 30 20 25 AMPERES 30 34 ...

Page 37: ...NSATION GEK 26423 3 1 f 12 C w I I 5 EEEEEEEEHHHLIIWHH E TYpF CEYG5IA RELAY TIME CuRENT CHAACTER STC F DR PHASE CR Th UND FAULTS C PENSATI N IDD FFAULT HMS ZFSELY REACH SETTING l H1S E H HE E H E E E E E H E __ r s z I F1 3RTAP 0 5 10 15 20 25 2JLTAF 0 L5 5 22 5 3D 37 5 45 IJLTP 0 3 45 60 75 9 M P RE S 35 ...

Page 38: ... n C 0D Co U m c cy 1 1 9 f C Lj TIThE EVALUATI ON OF K AND A VS Z 0 Z 1 F M F CEYG5IA ...

Page 39: ...L LOCATION H 4 157MM SURFACE MID 32 STUDS 5 16 18 STUDS SCREWS 4 FOR SURFACE MTG 6 625 168MM 20 312 516MM 6 HOLES 6MM 6 MT 1917151311 OOQQ OOOO 20 18 16 14 1 GLASS 1 9 875 5 05MM S TUB NUMBER 1 ND 1 0 32 STUDS OR SCREWS _I 9753t OOQQ 0000o 10 8 6 4 2 BACK VIEW CUTOUTS MAY REPLACE DRILLED ROLES CUTbUT 218 5MM 1 33MM 74 DRILL 500 12MM TYPICAL 76MM VIEW SHOWING ASSEMBLY OF HARDWARE FOR SURFACE MTG ON...

Page 40: ...CHEMATIC DIAGRAM OF TEST CIRCUITS FOR CEYG51A RELAYS 120V 3 LOAD BOX 3 3 WIRE TEST CIRCUIT STARTING UNIT TA C f F I I G COMPENSATING WINDING CENTER TAPPED 5 KVA AUTO TRANSFORMER zç cç 1 VAR IAC RATED 20 AMPERES 3 4 WIRE TEST CIRCUIT LOAD BOX N 10 D B F 1 F H 6 COMPENSATING WOG 38 ...

Page 41: ...FOR TOP UNIT SEE TABLE VII FOR OTHER UNITS CENTER TAPPED KVA AUTO TPANSFOFR VAPIAC RATED AT 20 AMPERES FIG 17 0227A7004 2 TEST CIRCUIT FOR FIELD TESTING THE STARTING UNITS OF THE CEYG51A RELAY USING A 3 PHASE 3 WIRE TEST SOURCE 0 R 39 ...

Page 42: ...TARTING UNITS A 3 PHASE 4 WIRE TEST SOURCE OF THE CEYG51A RELAY USING ØA LOM 60 X øC II F D C EXT JUMPER IL1 L SEL ECTORN SWITCH 1 FAULT SFL a OUTPLW lit N SELECTOR XL RL ri JUMPER 13 I4 J AH Z 600 CONNECTIONS SHOWN FOR TOP UNIT CHECK TABLE VII FOR MIDDLE AND BOTTOM UNITS 8 93 600 GENERAL ELECTRIC PROTECTION AND CONTROL BUSINESS DEPT MALVERN PA 19355 ...