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Page 1: ...ay Check Figure 1 of this insert booklet for the 12CEY56A A internal connections These instructions do not purport to cover all details or variations in equipment nor to provide for every possible con...
Page 2: ...2 03 1 Cl I SI 53 10 95 15 15 95 0 135 ryrp LnrpairrpnJ rjrn i NC 01 2 03 1 FREST RTT REST 02 3 v REST rV J01 2 _ 302 3 rj j QJR22 J 1 303 1 _R23 I A a 0 A O 0 BC7 2 B X X y V V I o o o O 10 2 8 6 Xz...
Page 3: ...GEK 1289H INSTRUCTIONS MHO DISTANCE RELAY TYPE CEY52A GENERAL ELECTRIC Courtesy of store ips us...
Page 4: ...ks MHO Units Electrical Tests Target Seal in INSTALLATION PROCEDURE Location Mounting Connections Visual Inspection Mechanical Inspection Portable Test Equipment Electrical Tests on the MHO Units 9 9...
Page 5: ...ive for several cycles after the inception of a fault it will not provide time delay protection for any fault that results in zero voltage at the terminals of the relay When applying this relay for th...
Page 6: ...mum reach and adjustment ranges of the mho units are given in Table I TABLE I BASIC MINIMUM REACH 0 N OHMS RANGE 0 N 0HMS1 ANGLE OF MAXIMUM TORQUE ONE SECOND RATING AMPS 0 5 1 0 1 5 0 5 15 60 225 1 2...
Page 7: ...4 42 0 54 DC Resistive Interrupting Rating Amps 2 5 Amp 125 VDC OPERATING PRINCIPLES The mho units of the CEY52 relay are of the four pole induction cylinder construction in which torque is produced b...
Page 8: ...nit by means of the links on the rear providing a total range of up to 30 to one The circle will always pass through the origin and have a diameter along the 60 degree impedance line equal to the ohmi...
Page 9: ...of the curve The steady state curves of Fig 3 were determined by tests performed with no voltage supplied to the relay before the fault was applied The dynamic curves were obtained with full rated vol...
Page 10: ...ing is tapped in ten percent steps from 15 percent to 95 percent The other winding is tapped at zero percent one percent three percent and five percent The desired tap setting is made by the proper lo...
Page 11: ...r the 3 0 ohm basic reach tap setting and one ohm tap setting w i l l be lower The burden for the two ohm POTENTIAL CIRCUITS The maximum potential burden imposed on each potential transformer at 120 v...
Page 12: ...hms per mile Zpri 50 0 14 j0 80 7 j40 ohm total PT Ratio 230 000 115 2000 1 CT Ratio 600 5 120 1 CT Ratio zsec zpri PT Ratio 120 7 0 j40 0 0 42 j2 4 ohms zsec 2000 2 4 3 80 5 ohms zsec Assume that the...
Page 13: ...ng of important interlocking circuits The relay mechanism is mounted in a steel framework called the cradle and is a complete unit with all leads terminated at the inner block This cradle is held firm...
Page 14: ...relay in order that none of the parts are injured or the adjustments disturbed If the relays are not to be installed immediately they should be stored in their original cartons in a place that is free...
Page 15: ...rs are of course essential It is desirable to check the factory setting and calibration by means of the test described in the following sections The mho units were carefully adjusted at the factory an...
Page 16: ...the limits shown Note that the tap screws on the current tap blocks are set to the position which gives the basic minimum reach shown in the table Note that for the test conditions the mho units see a...
Page 17: ...300 1 300 5 TABLE X ANGLE OF MAXIMUM TORQUE 0 ANGLE METER READING ANGLE OF TEST SET PICKUP MAX TORQUE ANGLES AT AMPS CONNECT LEAD TO RELAY STUDS AS FOLLOWS JUMPER RELAY LOCATION UNIT LEAD A LEAD B LEA...
Page 18: ...CTION in the section on ACCEPTANCE TESTS PORTABLE TEST EQUIPMENT To eliminate the errors which may result from instrument inaccuracies and to permit testing the mho units from a single phase AC test s...
Page 19: ...with short reach setting is to be checked and it is suggested that a reactor of suitable value be used for this purpose since this will tend to limit harmonics in the fault current Since the reactance...
Page 20: ...From this calculation it is seen that the reactance and the impedance may be assumed the same for this particular reactor tap Actually the difference need only be taken into account on the reactor 3...
Page 21: ...N Before placing a relay into service the following mechanical adjustments should be checked and fault conditions corrected according to instructions in the ADJUSTMENTS subsection of this section or u...
Page 22: ...ystem it is important that a periodic test program be followed It is recognized that the interval between periodic checks will vary depending upon environment type of relay and the user s experience w...
Page 23: ...ter reads the value shown in Table XII Now reduce the voltage to the test voltage value and set the current at the value shown in Table XII for the unit being adjusted Insert the blade of a thin screw...
Page 24: ...est angles set voltages and the pickup amperes are shown in Table XIV First the reach of the unit at its angle of maximum torque should be checked and adjusted if necessary as described in OHMIC REACH...
Page 25: ...so that the unit just picks up Now check the pickup current at 255 degrees The pickup current at both test angles should be within the value listed in the table After the setting is made make sure the...
Page 26: ...W7 R 22 MHO UNIT 2 3 V 1 L LOWER TAP BLOCK RESTRAINT TAPS fh R 13 I MHO UNIT 3 1 i R 23 i Fig 1 8036590 MHO Distance Relay Removed from Case Front View t 1 2 TAP BLOCK BASIC MIN REACH 2 3 TAP BLOCK B...
Page 27: ...ES SHOW CURRENT XXX FOR 1 0 2 0 AND 3 0 OHM BASIC MINIMUM XI REACH SETTINGS DATA TAKEN WITH PHASE X TO PHASE FAULT AT UNIT ANGLE OF MAXIMUM TORQUE 600 LAGJ STEADY STATE CHARACTERISTIC DYNAMIC CHARACTE...
Page 28: ...ASF 1 ST 7QNF MHO RFI AY 1 2 P ASF 1 2 UNIT FTC SE 1 2 TRANSACTO Rl 2 PHA R ETC H l T A SI TARGET A SEAL IN UNIT 0 20 tgr irp T ll 4 SL 6 3 PHASE 2ND ZONE MHO RELAY CEY52A 21 Z2 TS1 J 1 2 PHASE 1 2 UN...
Page 29: ...RESTRAINT TAP SETTING O FRONT Fig 5 0208A5577 0 Schematic Connections of Typical M2 Unit x 1 25 75 SETTING 1 2 OHMS 1 0 600 SETTING 1 0 OHM I 7 75 I I i I 1 50 r I 25 X v R OHMS 50 25 75 Fig 6 0178A8...
Page 30: ...5 55 65 75 85 95 NO 1 r 3 1 0 NO 1 95 1 85 75 65 I 55 45 0 1 35 25 3 L 15 5 I PMq I 91 RESTRAINT TAP SETTING 89 RESTRAINT TAP SETTING FiQ a Fig 7 0208A3757 1 Tap Block Arrangement and Settings 28 Cour...
Page 31: ...MULTIPLY FAULT CURRENT BY 1 5 FOR 1 0 OHM MULTIPLY BY 3 4 4 f T n 44 t 00 2 f 00 t T t o o t 0 1 OO LU tt u t n o 44 r Z L4 44 t Z FAULT Z SETTING UJ f t 85 o Z FAULT Z SETTING 50 1 E 4 t t E f E C i...
Page 32: ...and Shorting Bar 19 17 15 13 II o o o o o I 4 12 16 A A A A A n A NT Nt 2 3 NT 2 y 3 r CM POLAR C12 f r TgSI NT 3 POLAR T S POLAR SO J_0 1 35 5 5 95 0 1 3 S Lpyn J lAyru r rp NO I N O l fill 2 REST h...
Page 33: ...8 19 20 18 19 20 14 15 7 9 BOTTOM 03 1 9 5 6 8 10 Fig 11 0195A4991 1 Test Connections for Checking the Correct MHO Unit Operation Fig 12 0195A4992 0 Diagram Showing Reach of MHO Unit at Angle of Test...
Page 34: ...ASE 3 CURRENT AND PHASE 3 1 VOLTAGE I 10 11 a 19 12 20 TOP TEST PLUG CM 2 A CM l 9 4 f 8 A c 0 CM i 9 in 8 CO m 8 1 0 2 ffllO BOTTOM TEST PLUG 0 9 5 4 I 8 1 5 CM 8 8 I m A 8 11 iig 12 20 TOP TEST PLUG...
Page 35: ...PIVOT ASSEMBLY CONTROL SPRING SPRING ADJUSTING RING STATIONARY CONTACT MOVING CONTACT BACKSTOP Fig 15 8034958 Four Pole Induction Cylinder Unit Typifying Construction in the CEY52A Relay 33 Courtesy o...
Page 36: ...3 0 76MM 6MM it it I r t 4 I6 HMjkniTL 5 8 9 875 251MM r 937 7 781 I 198MM I A r 6 75 I 252MM L L r 13 50 342MM t 3 500 f F i 50 Ii 88MM 19 75 502MM 15 562 396MM CUTtlUT 19 875 g 504MM 24 I I f 4 1 4...
Page 37: ...NER STATOR OR CORE B MAGNET COILS C WAVE WASHERS D OCTAGON NUT FOR CORE ADJUSTMENT E FLAT WASHER F CORE HOLD DOWN NUT HEXAGON r P 3 5 n Is E r X C D E F Fig 17 0208A3583 0 Core Adjustment 35 Courtesy...
Page 38: ...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 store ips us...
