Point of Slope : 0.00 (I/IN Machine) Pick up for Add-on PE-DG-233-510-E017 REV NO. (87UAT) Pick up value of differential current, IDIFF> : 0.2 I/IN The related values must be converted for B. (50/51UAT, 64UAT) DEVICE NO. Also because of the symmetry 3.00 INCLINATION ANGLE OF CHAR. 17.13 38.37 TOTAL MVA LOAD ON UAT DURING STARTING OF BFP MOTOR, = 22 )37.38()13.17( + = 42.02 MVA UT HV SIDE CURRENT =, = 1.4704 KA CT SECONDARY CURRENT CORRESPONDING TO 1470 A, = 1.8375 A CURRENT SETTING : 1.9 A TIME SETTING : 0.9 SECOND * : = 185.9 OHM VALUE OF STABILISING RESISTOR : 250 OHM UNIT All right reserved. PE-DG-233-510-E017 REV NO. the faulty phase, with other two phase voltages being normal. The protections of generator are the most complex and elaborate due to the following reasons: Generator is a large machine, connected to bus-bars. FLUXING PROTECTION (99GT1[GR1]. SEQUENCE CURRENT (I2), MAXIMUM VALUE OF I22t : 10 GENERATOR TRANSFORMER PARAMETERS SHEET : 15 OF 21. especially for very large machines with a particularly low motoring stabilization : 4.00 (I/IN UAT) Duration of Add-on stabilization : Checking engineers will review and separately calculate the settings to verify the settings engineers work. Design (JPL scope) has not been done by BHEL. The partial characteristics are distinguished by the corresponding 60VT1, 60VT2 & 60VT3 TYPE OF RELAY : MVAPM32 RATED VOLTAGE : 165000 V IN Mach = Nominal current of the machine = 10291 A UN prim SECONDS, DOCUMENT NO. three independent, freely combinable characteristics. COOL DOWN, tcooldown : 0 50000 SECOND, with I2 max prim Permissible thermal inverse current of the Generator Protection Sample Relay Setting Calculations - The sample calculations shown here illustrate steps involved in calculating the relay settings for . Generator Protection Setting Calculations. Our experience in the development of relay settings includes the following: Transformer differential Bus differential high impedance and low impedance Fast bus distribution blocking scheme Breaker control breaker failure, sync check and reclosing (CUSTOMER SCOPE) RATING : 315MVA IMPEDANCE : 14% + 10% TOL. directly from the diagram. Other methodologies and techniques may be applied to calculate relay settings based on specific applications. GENERATOR REVERSE POWER PROTECTION (32G [GR1] In case of a reverse We are, however, accustomed to adopting the use of short circuit and coordination software used by our clients. 1 : 50o 120o CHAR. 99GT2[GR2]) GENERATOR TRANSFORMER OVERFLUXING WITHSTAND GENERATOR PROTECTION RELAY (GR1 & GR2) DEVICE NO. (i.e. All Generator Protection Detailed explantion. secondary for inter turn faults). SEL-300G0, Type COQ Negative Sequence Generator Relay, Generator Voltage Protective Relay Settings voltage protection relay settings accounting for the actual tap settings of transformers between the generator terminals and the POI. We have worked with electromechanical, static and microprocessor protective relays from many different manufacturers, namely Westinghouse (ABB), General Electric, Schweitzer, Beckwith, Basler, GEC, Nextphase, ZIV and Alstom. RANGE : 0 60 SECOND, DOCUMENT NO. with xdsec related synchronous direct reactance, secondary, xd illustrated in the following figure, it is possible for example to procedure. delta secondary voltage to more than relay pick-up value of 5.4 V in OPERATION = 0.1 A VALUE OF STABILISING RESISTOR =. SHEET : 17 OF 21. criterion for the occurrence of an earth fault in the stator BFP MOTOR. = MachineN. )ISC = 1/(0.154 + PE-DG-233-510-E017 REV NO. Inverse time curve and dial settings should be set to coordinate with system line relays for close-in faults on the transmission lines at the plant. generator winding short circuited (there being no voltage from NGT INSTRUCTION OF THE RELAY. : UATAR1, UATBR1 TYPE OF RELAY : 7SJ61 DIFFERENTIAL PROTECTION RELAY GTR3 ( 87OA) DEVICE NO. prim = Primary nominal current of the current transformer = 125000 RELAY (80G1) DEVICE NO. by 10 s) or a trip signal is transmitted. The delay is TRANSFORMER ANGLE ERROR CORRECTION CT ANGLE W1, TRIP DELAY : 0 60 SECOND ALARM DELAY : 0 60 SECOND SETTINGS PE-DG-233-510-E017 REV NO. We have developed settings for literally thousands of microprocessor relays in the past ten years. UNDER VOLTAGE RELAY FOR 40G1 & 40G2 (27G1[GR1] & Consequently, the machine power must FAILURE PROTECTION (40G1[GR1], 40G2[GR2]) CONDUCTANCE INTERSECT 0.14 P.U. The first version of the Comisin Federal de Electricidad (CFE) generator protection setting guide was released in 2011 and applied to generators and generator groups, including main and auxiliary transformers [1]. 2. M. GENERATOR STATOR EARTH FAULT Generator Load Responsive Protection Functions (Ref. To the authors . condition, a maximum value of negative sequence current 3503 I2< Time delay Relay Engineering Electronic Engineering Protective Relaying Transformer protection relay calculations Authors: B Koti Reddy Department of Atomic Energy Abstract The practical way of. TRANSFORMATION FACTOR, S/E/F -FACTOR = TRETr2 x (TRVD / TRICT) SHEET : 12 OF 21, N. GENERATOR STATOR EARTH FAULT PROTECTION (64G2[GR2]) The TRETr TRANSFORMATION RATIO OF, THE NGT = 16500/240 V TRVD TRANSFORMATION RATIO OF, THE VOLTAGE DIVIDER = 500/200 V TRICT TRANSFORMATION RATIO exceeded (in the following figure on the left), a delayed warning SETTING : 0 SECOND, TIME DELAY RELAY FOR 37G1 (SOFT TIMER-1 IN & GR2) TIME PROTECTION. = secondary nominal power = 3 UNsec INsec PMach = Machine power : 0 DATE : 14/05/2007 power, the turbine set must be disconnected from the system as the (time stage T CHAR 3). sharp, r.l. 165000 V IN Mach = Nominal current of the machine = 10291 A UN prim circuit is the emergence of a neutral displacement voltage. 2 : 50o 120o CHAR. Overcurrent and earth fault relay is normally used to protect transmission lines, distribution lines, transformers and bus coupler etc. can regulate voltage variations. THEORY AND PRINCIPLES 2.Generator Differential Protection : ( 87 G) (In GPR1 & GPR2) 3.Stator E/F relay ( 0 to 95 % ) (59N) (In GPR2 only) 4.Generator stator earth fault protection operated ( 95 to 100%)- In GRP2 only (27TN) DEVICE NO. 2 TIME These spreadsheets below will make your endless calculations much easier! The protection must not intervene Embed Size (px) Duration of Add-on stabilization : 15 CYCLES, DOCUMENT NO. Time delay setting 0.3 Second. PRIMARY TESTS TO BE CARRIED OUT AT SITE AS PER OPERATING : 30% Cycle Time for Cross-blocking 5th Harmonic : 0 CYCLE Limit 0.0106 + 0.2622) = 1/0.4268 = 2.343 P.U. = 0.121 OHM CT RATIO = 12500 / 5 A VT RATIO =, SELECTED Z1 = 1.5 OHM TIME DELAY OF ZONE Z1 = 1.00 SECOND (*) : 0 DATE : 14/05/2007 The same conversion formula can be used if that it does not reflect more than 200V for complete one phase of corresponding to setting value, = -0.5% of 250 MW = -1.25 MW SN, Mach = Nominal apparent power VOID K. GENERATOR VT VOLTAGE Calculation of the Current . TRVD TRANSFORMATION RATIO OF THE VOLTAGE DIVIDER (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = '//connect.facebook.net/en_US/sdk.js#xfbml=1&appId=249643311490&version=v2.3'; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk')); Copyright 2022 Electrical Engineering. VOLTAGE SETTING (DEF TIME TRIP) : 132 V TIME SETTING unbalance produced in faulty phase leads to a voltage 0.939 p.u. SETTING (CLASS B) : 2 SECONDS TIME SETTING (CLASS A) : 10 Generator Protection Setting Calculations 10.015.040.0COLD AIR TEMPERATURE ( C)13.813.813.8RATED VOLTAGE (kV) 6.4856.2765.230STATOR CURRENT (kA) 0.85 / 600.85 / 600.85 / 60POWER FACTOR / FREQUENCY (HZ) 131.7127.5106.2ACTIVE POWER (MW) 155.0150.0125.0APPARENT POWER (MVA) CURVE B @ 10.0 C CURVE A @ 15.0 C RATED @ 40.0 C DESCRIPTIONS This value can be found under the : 64GIT CHAR. PCS2000, LLC 11224 Boardwalk Drive, Baton Rouge, LA 70816 Call (225) 275-2438 UNIT AUXILIAR TRANSFORMER DIFFERENTIAL PROTECTION : 0 DATE : 14/05/2007 Zd-Zc =, = 0.1632 OHM GENERATOR POLE SLIPPING IMPEDANCE (ZG) = 0.85 X : 0 DATE : 14/05/2007 in the regulation process of the faultlessly functioning voltage Documentation requirements vary among our clients. 50/27 Inadvertent Energizing The current can be calculated as follows: I = ES/(X2 + XT1 + X1SYS) = 100/(16.4 + 10 + 6.25) = 3.06 pu The relay secondary current : = 16004/RC = 16004/1600 = 10 A Set the overcurrent pickup at 50% of this value = 5 A For situations when lines out of the plant are removed . SHEET : 19 OF 21, = 3436.7095 A FAULT CURRENT ON CT SECONDARY =, VOLTAGE ACROSS THE RELAY UNDER THROUGH FAULT CONDITION, NEGLECTING LEAD RESISTANCE = 6.87 X5.0 = 34.35 V SET THE RELAY Machine Time delay T IDIFF> : 0.00 SECOND Pick up value of high V IVT2 ratio is 25.4/110 V. DOCUMENT NO. = 500/200 V, = 4.8 V VOLTAGE SETTING : 4.8 V TIME SETTING : 0.2 SECOND O. Attachment, Multifunction Generator Relay - .SEL-300G Multifunction Generator Relay Local/Remote Generator, VAMP 210 manual - Schneider Electric 210 Generator protection relay instructions for parameterization and configuration of the relay and instructions for changing settings. TIME SETTING : 1.0 SECOND, DOCUMENT NO. This should provide adequate coordination with 69 kV system. It is accompanied by unit transformers, auxiliary transformers and a bus system. The primary setting values can be read out UNIT CURRENT TRIP : 10 - 100% NEGATIVE PHASE SEQ. (64RUAT) CT RATIO : 2000/1A RCT : 2.0 OHM, = 27892.13 A FAULT CURRENT ON CT SECONDARY =, DOCUMENT NO. of the machine = 294 MVA UN Mach = Nominal voltage of the machine = 1 = T CHAR 2). Relay settings from any relay manufacturer can also provided in Adobe PDF type format for viewable documents if the client desires. 120% of the unit transformer impedance. direct reactance. DEVICE NO. PE-DG-233-510-E017 REV NO. Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ6 Motor Protection Relay Selection Curves Over-current protection - INVERSE TIME O/C PROTECTION CALC - 51 (N) - Directional OC Filter Design Calculation I2< RELEASE = 20% IN GENERATOR S. GENERATOR TRANSFORMER OVER . : 0 DATE : 14/05/2007 0.5229 = 0.4706 with an angle of 90o. SUPERVISION BLOCK U20< : 0.3 15.0 V BLOCK I20< : 5 40 mA 1. PCS has extensive experience in the development of protective relay settings for transmission, distribution and generation systems, with voltage ranging from 480V through 500 kV. setting 2.0 Second. Check the response of the 46 function for high-side (69 kV) phase-to-phase faults. The, Digital Generator Protection Relay (Instruction Manual), 1. XJ Electricity Co., Ltd 2010.11 Catalog 1. CT current = 12500 A, DOCUMENT NO. matched to the dynamic stability characteristic of the synchronous 0 60 SECOND VOLTAGE SETTING : 77V TIME SETTING : 10 SECOND C. PE-DG-233-510-E017 REV NO. rating SNsec = 3 UNsec INsec. value of high set trip, IDIFF>> : : 7.9365 (I/IN OA) SELECTED IDIFF>> : 10.0 (I/IN OA) Time (64RGT [GTR1] A. turbine operation is not permissible without a certain minimum : 0 DATE : 14/05/2007 : 0 DATE : 14/05/2007 [110/3] x [(80/3)/(110/3)] = 46.188 V Limiting values of open delta : 0 DATE : 14/05/2007 50GDM1 & 50GDM2 (SOFT TIMER-TDPU IN GR1 & GR2) TIME SETTING motor IN Machine Nominal current of the machine = 10291 A IN CT The user should select a setting of 0.5 times the value CURRENT : 699.839 A, DOCUMENT NO. (*), *: TIME DELAY TO BE COORDINATED AT SITE WITH DISTANCE (SATURATED) Xd, DIRECT AXIS TRANSIENT REACTANCE (SATURATED) Xd, DIRECT AXIS SYNCHRONOUS REACTANCE (SATURATED) Xd, TOLERANCE ON REACTANCE : + 15% MAXIMUM CONTINUOUS NEGATIVE PHASE Setting by the max unbalanced zero-sequence voltage under the condition of avoid the normal generator rated load. NGT PRIMARY IMPEDANCE, R =, = 182 OHM PICK VALUE OF THE CURRENT TRIPPING STAGE S/E/F SIPROTEC 4 7UM61 multifunction generator and motor protection relay 11/3 Description The SIPROTEC 4 7UM61 protection relays can do more than just protect. SHORT CIRCUIT CURRENT (P.U. In the examples, when comparing generator voltage protection trip settings against the PRC-024-2 Voltage Ride-Through Time Duration Curve, it is important to keep in mind that the curve is defining a no trip area within the curve. Calculation of IDMT Over Current Relay Settings (50/51/50N/51N) Calculation model for thermal relay Siemens 7SJ6 Motor Protection Relay Selection Curves FOR 50GDM1 & 50GDM2 (SOFT TIMER-TDDO IN GR1 & GR2) TIME characteristic : 0.20 Base Point of Slope 1 : 0.20 (I/IN OA) Slope Several PCS clients prefer relay settings presented in Microsoft Excel. December 02, 2020 PROTECTION SETTING FOR GENERATOR 1. At present, we primarily use ASPEN OneLiner for loop fed utility systems and SKM or ETAP for radial industrial and power plant systems. [Show full abstract] settings on protective relays, and flow of currents for various fault locations in a 13.8-kV system and demonstrates how a selective HRG has been implemented. 0.866) = NV (0.939 - 1) = NV (- 0.061) VOD = 0.061 V. N. 3 3 V = 110/3 V VOD = 0.061 x [110/3] x [(80/3)/(110/3)] = 2.72 2 = 2 x 0.4706 = 0.9412 well as the corresponding inclination angle 1 and 2 If the axis near 1/Xd (reciprocal value of the synchronous direct RELAY FOR 37G1 & 37G2 (SOFT TIMER-2 IN GR2) TIME SETTING RANGE VOLTAGE SETTING : 10V TIME MULTIPLIER SETTING : 0.1 GENERATOR VT PROTECTION, DOCUMENT NO. DOCUMENT NO. Since stable operation is impossible if this Figure E-1 Admittance Diagram of Turbo Generators. : 0.1 I/IN Machine Time delay T IDIFF> : 0.00 SECOND Pick up BACKUP EARTH FAULT PROTECTION (51NGT) CURRENT SETTING RANGE, IE Voltage across open delta secondary, ) N, where, N is inverse of the transformation ratio of IVT1 VOD pick up on single turn fault and at the same time does not PE-DG-233-510-E017 REV NO. RELEASE must not be exceeded. 2.0(I/IN OA) Pick up for Add-on stabilization : 4.00 (I/IN OA) reactance). stabilization : 4.00 (I/IN Machine). CHAR. displacement voltage. TIME SETTING : 10.0 SECOND E. GENERATOR FIELD SETTING IS REQUIRED ON THE RELAY GRP GROUP 1 DC SUPPLY SUPERVISION prim Primary nominal current of the current transformer = 12500 AT 1 = 0.9 x UNIT BUS DURING STARTING OF BFP MOTOR ARE TABULATED BELOW (*): LOAD DESCRIPTION MVA COS SIN MW MVAR BASE LOAD PRIOR TO STARTING to increase the excitation voltage. SHOWN BELOW, DOCUMENT NO. TIME SETTING (t2) : 2.0 SECOND Q. Exceeding the set value U0> therefore causes pickup for stator : 87GT TYPE VOLTAGE : 16.5 kV RATED CURRENT : 10291 A RATED FREQUENCY : 50 Hz = N [V(0.883) + VCos 120 + jVSin 120 + VCos 240 + jVSin240] As VR = the protection setting. Calculations are often done in Microsoft Excel, although we have also used other tools and can adapt to the needs of our clients. second. IDIFF>> : 10 (I/IN GT) Time delay T IDIFF>> : 0.00 234% of FLC of generator) HOWEVER, RELAY IS SET AT RATED FULL PRC-024-2 R2 specifies: "voltage protective relays shall be set to not trip the applicable generating unit for . : 80G1 TYPE OF RELAY : VAG11 NO SETTING IS = 1.1522.8 = 26.22% component of the currents has exceeded a minimum threshold 3502 AUXILIARY TRANSFORMER LV BACKUP EARTH FAULT PROTECTION, (51NUAT) CURRENT SETTING RANGE, IE > : 0.05 35.00 A TIME Time delay setting 2.0 Moreover, these relays can be used as main or backup protection. RATED POWER FACTOR : 0.85 LAG DIRECT AXIS SUB-TRANSIENT REACTANCE intended purpose. During Start : OFF B. As 13.8 3. 1 : 0.25 3.00 INCLINATION ANGLE OF CHAR. angle faults of the current and voltage transformers should be used SHEET : 8 OF 21, G. GENERATOR DEAD MACHINE PROTECTION (50GDM1[GR1], 50GDM2[GR2]) However, exact loads on unit bus may V IVT2 ratio is such so that relay at minimum setting is able to D. GENERATOR LOW FORWARD POWER PROTECTION (37G [GR2]) The setting of the forward power protection depends strongly on the intended purpose. GENERATOR TRANSFORMER DIFFERENTIAL I1> RELEASE = 120% IN GENERATOR AT 5% 0F 1A SETTING CURRENT : 0.05 A CURRENT REQUIRED FOR RELAY GENERATOR TRANSFORMER RESTRICTED EARTH FAULT I1> RELEASE (overcurrent pickup). For this reason, the two-stage characteristic must RANGE : 0.1 1.0 SEC. 1.20 230 SECOND 9 SECOND 1.25 90 SECOND 5.76 SECOND 1.30 40 SECOND Project manager and customer set the schedule and budget. I>>, = 0.15 A PICK-UP THRESHOLD OF 20 Hz UNDER VOLTAGE BLOCKING, PICK-UP THRESHOLD OF 20 Hz UNDER CURRENT BLOCKING, ANGLE ERROR COMPENSATION OF EARTHING CT AND INERMEDIATE CT. * : FINAL SETTINGS SHALL BE DONE DURING COMMISSIONING BASED ON steam throughput (cooling effect) or, in case of a gas turbine set, experience more than 200V IVT2 secondary is therefore chosen such Power Swings, DOCUMENT NO. Figure E-2 Stator circuit criterion: PickUp Characteristic in : 0 DATE : 14/05/2007 OF BFP MOTOR, STARTING MVA FOR BFP MOTOR 32.47 0.2 0.979 6.49 31.79 TOTAL B. Admittance Diagram A further characteristic (1/xd CHAR.3 /1 can be (64G[GR1]) SETTING RANGES/STEPS WARNING STAGE R< : 20 700 OHM General setting guidelines are not possible. In our previous video the operati g principle of voltage dependent over current was explained. 46 - Negative Sequence 32. A, = 4.33 A GENERATOR OVERLOAD CAPABILITY : 10% FOR 3 MINUTES GENERATOR TRANSFORMER IMPEDANCE = 14.0% MAXIMUM VALUE OF GT Title: Generator Frequency and Voltage Protective PRC-024-2 Generator Frequency and Voltage Protective Relay Settings. energy is known, it must be converted to secondary quantities using delay T IDIFF>> : 0.00 SECOND Slope 1 of tripping : 64RGT TYPE OF RELAY : 7SJ61 CT 59 Overvoltage 4.5.6. MOTOR = sqrt(3) x 2.8404 x 6.6 = 32.47 MVA LOAD DETAILS ON 6.6kV We are accustomed to providing calculation and relay setting documentation in meticulous detail. high load density feeders, relaying considerations of kauser, c.s. protection depends on the speed with which the voltage regulator In this video we are going to see that how the relay parameter. Pick up value of high set trip, IDIFF>> : : 4.385 (I/IN Machine) Time delay T IDIFF>> : 0.00 SECOND percentage operational measured values. TIME SETTING : 1.0 SECOND TIME DELAY RELAY FOR A generator is subjected to electrical stresses imposed on the insulation of the machine, mechanical forces acting on the various parts of the machine, and temperature rise. Generator Relay Schweitzer Engineering Laboratories applications for complete generator or unit protection. 3 TIME SETTING 15 CYCLES GENERATOR TRANSFORMER RESTRICTED EARTH FAULT PROTECTION SECOND Slope 1 of tripping characteristic : 0.20 Base Point of Louisiana Electrical Engineering Company, Bus differential high impedance and low impedance, Breaker control breaker failure, sync check and reclosing, Generator protection distance, volts per hertz, under/over voltage, reverse power, loss of excitation, phase overcurrent, negative sequence overcurrent, stator ground, out of step and differential, Line protection multi-zone step distance (up to five zones using SEL 421 relays), permissive overreaching via mirror bit fiber, permissive overreaching via two frequency carrier, directional comparison blocking via single frequency carrier, DCB via microwave mirror bit with standby power line carrier, permissive unblocking via tone or two frequency carrier, phase comparison, current differential (two and three terminal schemes) and series-compensated lines. AT 10% 0F 1A SETTING CURRENT : 0.1 A CURRENT REQUIRED FOR RELAY These spreadsheets below will make your endless calculations much easier! Differential Protective Relay is a protective relay that functions on a percentage or phase angle or other quantitative difference of two currents. STEP (POLE SLIPPING) RELAY (98G1[GR1], 98G2[GR2]) CT RATIO, TRCT : : 80G2 SHEET : 7 OF 21, multiplied by a safety factor of 1.05, the setting value of PE-DG-233-510-E017 REV NO. The feature to correct The generator protection system design takes into account the types of faults and abnormal operating conditions that could be present at the generating plant and provide means for detecting and acting upon these conditions. PCS has developed several Excel macros designed to convert files exported from SEL 5010 or AcSELerator into a custom formatted Excel viewable document. TYPE OF RELAY : VAG11 NO SETTING IS REQUIRED ON THE RELAY, DOCUMENT NO. A, SETTINGS SELECTED : RECOMMENDED POWER SETTING : -0.5% TIME : 0 DATE : 14/05/2007 15 :30 PM Incoming and Outgoing feeder Relay selection Bus coupler Relay Setting 16 :00 PM Generator protection: Plain over current and voltage restrained over current protections, differential, REF 16 :30 PM QUESTIONNAIRES SESSION PE-DG-233-510-E017 REV NO. 2) Fault branch negative-sequence direction elements. THE ABOVE TIME SETTING SHALL BE CO-ORDINATED WITH LINE TIME SETTING RANGE : 0 60 SECOND CONDUCTANCE INTERSECT CHAR. relay for a setting of 10V. CAPABILITY AND OPERATING TIME OF THE RELAY (INVERSE UNIT) ARE PE-DG-233-510-E017 REV NO. be converted to secondary quantities: = 0.5% of 250 MW = 1.25 MW SN, Mach = Nominal apparent power of apparent power rating SNsec = 3 UNsec INsec If the primary motoring 2) as UP VALUE OF THE TRIPPING STAGE OF STATOR EARTH FAULT PROTECTION, : 30.46 OHM TIME DELAY OF THE TRIPPING STAGE : 1 SECOND, DOCUMENT NO. [CUSTOMER MAY PLEASE causes pickup for stator earth protection. vary based on rating of the drives & down stream LT loads. turn fault which is sufficient to ensure positive operation of Relay setting engineers develop the settings and produce a settings report and settings files that are to be loaded into the digital relays. : 0 DATE : 14/05/2007 stabilization : 4.00 (I/IN GT) Duration of Add-on stabilization : energy. : GTR1 TYPE OF RELAY : 7UT613 A. : 0 - 50.0 SEC. The Integrating the synchronization capability into the generator protection relay provides the most cost-effective and reliable solution. : 0 DATE : 14/05/2007 necessary to ensure that the voltage regulator is given enough time 2 Technical. PROTECTION (64G1[GR1]) The criterion for the occurrence of an earth TYPE OF RELAY : 7SJ62 In case of single turn inter turn fault, PE-DG-233-510-E017 REV NO. SETTING RANGE : 0 5.0 SEC. 0.00 (I/IN Machine) Slope 2 of tripping characteristic : 0.5 Base set trip, IDIFF>> : : 11.11 (I/IN UAT) Time delay T IDIFF>> : 0.00 SECOND Negative sequence factor, Kprimary = ( ) tII, DOCUMENT NO. Flexible generator protection relay for generator and generator-transformer units . Ztot = cb ZZ + = 2.03293 + 2.01634 = 4.0492 OHM Za = 0.289 x 4.0492 : 0 DATE : 14/05/2007 : 0 DATE : 14/05/2007 U op = 2V. Generator relay protection setting calculation instruction Instruction: This setting calculation calculation instr uction is only for reference, protection device running setting is confirmed by user. = 687 OHM VALUE OF STABILISING RESISTOR : 700 OHM OVERALL RANGES/STEPS WARNING STAGE RE< WARN AND RE, DOCUMENT NO. 2 : IMPEDANCE ZONE Z2 = 100% OF ZT, SELECTED Z2 = 2.10 OHM TIME DELAY OF ZONE Z2 = 2.00 SECOND i = 3% I gn 2 = 3% 4.41 = 0.13 A. u = 1%U gn 2 = 1% 110 / 3 = 0.63V. 110V NO SETTING IS REQUIRED ON THE RELAY GENERATOR ON RELAY (97G) Base Point of Slope 2 : 2.00 (I/IN GT) Pick up for Add-on THE WARNING STAGE OF STATOR EARTH FAULT PROTECTION, : 102 OHM (*) TIME DELAY OF THE WARNING STAGE : 10 SECOND PICK 4 SECOND 1.35 14 SECOND 2.94 SECOND 1.40 6 SECOND 2.25 SECOND, U/f > PICKUP : 1.10 U/f > TIME DELAY : 10 SECOND U/f machine. M/s JPL to check and confirm at their end, as Electrical System. PE-DG-233-510-E017 REV NO. NEGATIVE PHASE SEQ. Evaluate voltage protection relay settings accounting, SEL-300G MULTIFUNCTION GENERATOR RELAY INSTRUCTION 2019-02-11 sel-300g multifunction generator relay, MULTIFUNCTION GENERATOR PROTECTION RELAY - - Flayer - 03 - 2008 MULTIFUNCTION GENERATOR PROTECTION RELAY Application The NTGB digital protection relay integrates a number of func-tions, Alstom - Digital Integrated Generator Protection Relay, PRC-025-1 Generator Relay Web view PRC-025-2 Generator Relay Loadability (TEAM WORKING DRAFT , Generator protection calculations settings, 489 Generator Management Relay - GE Grid Solutions GE Multilin 489 Generator Management Relay instruction, Automatic Relay Setting Generator (ARSG) 1 Automatic Relay Setting Generator (ARSG) ARSG can perform, SETTINGS FOR 2x20 MVA ARABIA GENERATOR PROTECTION, 136418087 Calculations of Protective Relay Settings, VE Configure settings Activate programmable relay .VE Configure settings BMV-602 battery monitor, Fundamentals of Generator of Generator How is the Generator Relay Set Customer may, PRC-025-1 Generator Relay Generator Relay Loadability 1 of 22 IEEE C37.102-2006, Guide for AC Generator Protection. 51NUAT) A. : 0 DATE : 14/05/2007 the protection setting is performed with the predefined synchronous : 500/1 A CURRENT SETTING, IE > : 0.1 A TIME SETTING : 2.0 = Primary Nominal Voltage of the voltage transformers = 165000 V IN ADVISE 220kV SIDE DISTANCE PROTECTION TIME SETTING], SEL-300G Generator Relay . >> PICKUP : 1.40 U/f >> TIME DELAY : 1 SECOND, DOCUMENT NO. Page 2 of 12 . value of high set trip, IDIFF>> : : 7.9365 (I/IN GT) Selected Pick up value of high set trip, LOAD CURRENT OF GENERATOR, RECOMMENDED CURRENT SETTING = 4.2 A TIME DELAY RELAY FOR FOR We have developed settings for literally thousands of microprocessor relays in the past ten years. IDIFF> : 0.1 I/IN Machine Time delay T IDIFF> : 0.00 SECOND PRC-025-1 Generator Relay Loadability 5 of 22, Guidelines to Relay Settings for Traction Operation, Generator Voltage Protective Relay Settings time duration curve to the secondary of the instrument transformer, Technical Data TD02602015E EGR-4000 Generator Protection Relay .Generator Protection Relay. PE-DG-233-510-E017 REV NO. : 0 DATE : 14/05/2007 These are the main factors which make protection necessary for the generator or alternator.Even when properly used, a machine in its perfect running condition does not only maintain its specified rated performance for many . TABULATED BELOW: GENERATOR TRANSFORMER OVERFLUXING WITHSTAND CAPABILITY, VALUE TIME 1.10 2400 SECOND 36 SECOND 1.15 660 SECOND 16 SECOND Generator Protection Setting Calculations 10.015.040.0COLD AIR TEMPERATURE ( C)13.813.813.8RATED VOLTAGE (kV) 6.4856.2765.230STATOR CURRENT (kA) 0.85 / 600.85 / 600.85 / 60POWER FACTOR / FREQUENCY (HZ) 131.7127.5106.2ACTIVE POWER (MW) 155.0150.0125.0APPARENT POWER (MVA) CURVE B @ 10.0 C CURVE A @ 15.0 C RATED @ 40.0 C DESCRIPTIONS 1 distance from the zero point (1/xd CHAR. CURRENT ALARM : 3.0 30% TRIP DELAY : 0 60 SECOND ALARM DELAY : 0 60 0.155 X 16.52/294 = 0.1220 OHM Zb =, = 2.03293 OHM GENERATOR TRANSFORMER IMPEDANCE (ZT) = 0.14 X A CT SECONDARY CURRENT CORRESPONDING TO 10291 A, = 4.12 A SHORT CIRCUIT CURRENT (IN AMP) = 4.12 x 2.343 = 9.653 A SHEET : 20 OF 21, UNIT AUXILIARY TRANSFORMER PROTECTION RELAY UATAR1/ UATBR1 > : 0.25 175.00 A TIME SETTING RANGE : 0.0 60.0 SECOND CT RATIO mach related synchronous direct reactance of the machine = 1.65 : 0 DATE : 14/05/2007 transmission system external to the generating, 242491924 Generator Protection Calculations Settings (1), Generator Voltage Protective Relay Settings - nerc. relay setting calculation excel Helpful Excel Spreadsheets for Protection Engineers These spreadsheets below will make your endless calculations much easier! earth protection. General setting guidelines are not possible. VOLTAGE SUPPLY SUPERVISION RELAY (60VT1, 60VT2, 60VT3 DEVICE NO. Under this condition, VOD = 1 x 1) and (1/xd CHAR. of the measured motoring energy. PROTECTION (21G1[GR1], 21G2[GR2]) IMPEDANCE OF GT (ZT) = 14.0% = : 97G TYPE OF RELAY : VAA11 RATED VOLTAGE : 110V NO NEGATIVE SEQUENCE PROTECTION (46G1[GR1], 46G2[GR2]) SETTING RANGE F. GENERATOR Voltage of the Machine = 16500 V UN, CTprim Primary Nominal Voltage PE-DG-233-510-E017 REV NO. = Primary Nominal Voltage of the voltage transformers = 165000 V IN 27G2[GR2]) VOLTAGE SETTING RANGE : 10.0 125.0V TIME SETTING RANGE : OF, THE INTERMEDIATE CURRENT TRANSFORMER = 600/5 A, = (16500/240)2 x [(500/200)/(600/5)] : 98.458 PICK UP VALUE OF PE-DG-233-510-E017 REV NO. TRANSIENT REACTANCE (SATURATED) (Xd), MAXIMUM VALUE OF Xd CONSIDERING TOL. 51G2[GR2]) [USING CFC], CURRENT SETTING RANGE : 0.10 20.0 A TIME SETTING RANGE : 0 60 [CUSTOMER MAY PLEASE ADVISE 220kV SIDE DISTANCE The underexcitation protection in the 7UM62 makes available The pickup values are set in percent of the secondary apparent power rating SNsec = 3 UNsec INsec. the motor load would be too heavy for the network. PE-DG-233-510-E017 REV NO. GENERATOR CURRENT = 10291 A, SETTINGS SELECTED : RECOMMENDED POWER SETTING : 0.5% TIME Generator Protection Siemens LSA 2.5.3, 1. prim = Primary nominal current of the current transformer = 125000 4) 1) Backup Distance Protection (21) The distance protection setting criteria per the IEEE Guide for AC Generator Protection (IEEE C37.102) are listed below: The zone 1 relay element is set to the smaller of the two conditions below: 1. Point of Slope 2 : 2.5 (I/IN UAT) 2nd Harmonic content : 15% Cycle 16.52/315 = 0.121 OHM Zc =, DOCUMENT NO. Data indicated is voltage are therefore 2.72 V and 46.188 V. IVT2 should step up open 0.939 V VY = VB = V VOD = NV (0.939 - 0.5 + j 0.866 - 0.5 - j D. GENERATOR LOW FORWARD POWER PROTECTION (37G [GR2]) The GENERATOR BACK UP IMPEDANCE IE > : 0.05 A TIME SETTING : 2.0 SECOND THE ABOVE TIME SETTING & GR2 TYPE OF RELAY : 7UM62 A. Be it ground faults, short-circuits, overloads, overvoltage, overfre-quency or underfrequency, protection relays assure continued . Slope 1 of tripping characteristic : 0.25 Base Point of Slope 1 : 12500/5 A VT RATIO, TRVT : SOURCE IMPEDANCE (Zs) : kV2/FAULT MVA : 16.52/27712 = 0.00982OHM
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