GE CEY52B Instructions Manual
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GE CEY52B Instructions Manual

GE CEY52B Instructions Manual

Mho distance relay
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  • Page 2: Table Of Contents

    GEK-45495 CONTENTS PAGE DESC RIPTION.............. . AP PLI CATION ............. RAT I N GS .

  • Page 3: Description

    1.0 - 2.0 - 3.0 APPLICATION The CEY52B relay is a three-phase, single zone mho distance relay that is not meant to be used by itself, but rather is designed to used with a CEX20A or CEX20B reactance type relay.

  • Page 4: Operating Principles

    GEK-45495 TABLE II RANGE BASIC MIN REACH ANG L E OF ON E SECOND BASIC REACH TAPS ( 0-N OHMS ) * MAX TORQUE RATING ( 0-N OHMS) 60 ° 0. 5 0.5 - 2 . 0 6 0 ° 1.

  • Page 5: C Haracteristics

    GEK-45495 To prove that the equation defines a mho characteristic divide both side� by E and transpo�e. equation reduces to: Y cos - 9) Thus, the unit will pick up at a constant component of admittance at a fixed angle depending on the angle of maximum torque.
  • Page 6 GEK-45495 Underreach At reduced voltage the ohmic value at which the mho unit will operate may be somewhat lower than the calculated value. This "pullback" or reduction in reach is shown in Fig. for the 1 , 2 and 3 ohm basic minimum reach settings.

  • Page 7: Burdens

    GE K-45495 BURDENS CURRENT C I RC U I T S The maximum current burden imposed on each current transformer at 5 amperes is listed in Table TABLE V P . F . WATTS AMPS CYCLES . 043 . 026 0.

  • Page 8: Construction

    GEK- 4 5495 used in conjunction with a CEX20A to provide second zone protection and Assume that the CEY52 is to it is desired, after considering the effects of infeed, to set the relay to reach 3.6 4 /80.5 ° secondary ohms. The ohmic reach equation, For this application the three-ohm basic minimum reach setting should be used.

  • Page 9: Acceptance Tests

    GEK-45495 transit. If injury or damage resulting from rough handling is evident, file a damage claim at once with the transportation company and promptly notify the nearest General Electric Apparatus Sales Office. Reasonable care should be exercised in unpacking the relay in order that none of the parts are injured or the adjustments disturbed.
  • Page 10 GEK-45495 Use the following procedure in checking each unit. With the current set at five amperes and the voltage across 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 of maximum torque of the unit.

  • Page 11: Installation Procedure

    GEK-45 4 95 TABLE IX (CONTROL SPRING ADJUSTMENT) PHASE-ANGLE PICKUP AMPS VA-B UNIT l/2/3n UNIT METER 0.5/l.O/l.5n UNIT LOCA"'"ION SET FOR SETTING ln TAP 2n TAP 300 ° 6.0-7.0 3.0-3.5 1.5 Volts 300 ° 1.5 Volts 6.0-7.0 3. 0-3. 5 MIDDLE 300 °...
  • Page 12 GEK 45495 CONNECTIONS The internal connections of the CEY52B relay are shown in Fig. 10. An elementary diagram of typical external connections is shown in Fig. 4. VISUAL INSPECTION Remove the relay from its case and check that there are no broken or cracked component parts and that all screws are tight.
  • Page 13 GEK- 4 549 5 60 degrees. In determining the reactor tap setting to use, it may be assumed that the angl e of the test reactor impedance is dey,2eS. From the above, twice the relay reach at the angle of the test-reactor impedance is: 2Z relay 200X...

  • Page 14: Inspection

    GEK-4 549 5 When checking the mho unit at angles of more than 30 degrees off the maximum reach position, the error becomes relatively large with phase-angle error. This is apparent from Fig. where it is seen, for example, at the zero-degree position that a two or three degree error in phase angle will cause a considerably apparent error in reach.

  • Page 15: Servicing

    GEK-45495 SERVICING If it is found during the installation or periodic tests that the mho unit calibrations are out of limits, they should be recalibrated as outlined in the following paragraphs. It is suggested that these calibrations be made in the laboratory. The circuit components listed below, which are normal ly considered as factory adjustments , are used in recalibrating the units.
  • Page 16 GEK-45495 Note that an adjustment of the angle of maximum torque will have secondary effect on the reach of the unit, and vice-versa. Therefore, to insure 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" a-djustment routine of reach and angle of maximum torque until both are within the limits specified above.

  • Page 17: Renewal Parts

    GE K- 45 49 5 TABLE XV ANGLE METER READS SET AT PICKUP 0.5/1.0/1.5n UNIT 1/2/3Q UNIT AMPS UNIT ADJUST + 5% ln TAP 2n TAP LOCATION TORQUE TEST ANGLES 315 ° 285 ° 2 5 5 0 14 .4...
  • Page 21 GEK-45495 ------ . .,..- . ·:-- LINE - ---�-- OUTLINE DEVICE INTERNAL CEY5213 0269A3027 0171\A 7 336 0246"-&�30 020\\A31',24 CEX2013 S<\MI713 020�A 24 31 K 6209271 0104M523 \02L218 (d I RECTIFI OR G-12 (94) �OTE 1: WHEN USING AUXILIARY TRii' RELAY 'R'P TWO 8RF.,fRS.
  • Page 22 GEK-45495 ·-·-------· -------· - --D - r ·------o FLO.L TING WINDII· J G STRA INT Tt'v1C5 TING FRO��T (0208A5577-0) S CHEMATI C C ONNE CT I ONS OF FIC>. !:l L M2 UNIT...
  • Page 25 T Y P E C E Y 5 2 13 M H O U N I T O P E R AT I N G T I M E M A X I M U M T O R Q U E A N G L E (6 0 ° L A G2 A N D 1 0 0 °/o R E ST R A I N T T A P S E T T I N G tif)' ..,., ..
  • Page 26 GEK-45495 CO N N EC T I N G P L U G A UX I L I A R Y S H ORT I N G N OT E : A F T E R E N G A G I N G AU X I L I A R Y B R U S H , C O N N E CT I N G P L U G T R AV E L S I N C H...
  • Page 29 GEK-45495 TW I CE UN I T REACH AT TEST REACTOR ANGLE Z... J N F I G . 12 ( 0 195A4992 - 0 ) D I AGRAM SHOW I N G REACH O F MHO UN I T AT ANGLE O F T E S T REACTOR...
  • Page 30 GE K - 45 4 95 LEAD A VOLTS SYSTEM FREQ . LEAD B LEAD C LEAD D CON NECT LEAD TO RE LAY STUDS AS FOLLONS . J UMPER UN I T RE LAY LOCAT I ON LEAD A...
  • Page 31 G E K - 45 495 RE LAYS AN S TAT I ON ( 8 ) C ON N E C T I ON S TO PHASE A NG LE @ 2 0 ® 1 2 G) ® METER TO CHEC K PHASE 1 C U RRE N T TOP TEST PLUG A N D PHASE 1-2...
  • Page 33 GEK-45495 r-H:: L LO C AT I 0 t� :; 2 P ,\ ( 1 ()811/, M) SC R E W N U M B F R I N G Of� S T U D S (B A C K E ' N ) 1 9 1 7 1 5 1:;...
  • Page 34 GEK-45495 I N N ER STATOR OR CORE & MAG N E T CO I L S WAVE WASH E R S D. OCTACON N U T F O R C O R E ADJ U STh1ENT F LAT WASH E R CO R[ HOLD DOWN N U T ( H E XAGON ) 1 7 ( 02 0 8A358 3 - 0 ) CORE ADJ US TMENT...
  • Page 36 Meter and Control Business Department 2/92 General Electric Compan y ( 1 000) 205 Great Valle y Parkwa y Malvern, PA 79355...

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