md1-0-v-111!33!00852-a generator protection relay setting calculation

A 13.01.14 Issue for approval M.J.OH Y.J.SHIN M.D.SEO

REV. DATE DESCRIPTION DSGN CHKD APPD

SUB-CONTRACTORS DOCUMENT NUMBER: MD1-0-V-111-33-00852

A 13.01.14 Issue for approval J.A.SEO M.K.LEE J.Y.KIM

REV. DATE DESCRIPTION DSGN CHKD APPD

PROJECT :

TWO(2) x 500 MW MONG DUONG 1 THERMAL POWER PLANT

EMPLOYER :

CONSULTANT :

CONTRACTOR :

SUB-CONTRACTOR :

DESIGNED BY DATE TITLE :

M.J.OH 13.01.14 GENERATOR PROTECTION RELAY SETTING CALCULATION CHECKED BY DATE

Y.J.SHIN 13.01.14 APPROVED BY DATE PROJECT NUMBER DOCUMENT NUMBER REV.

M.D.SEO 13.01.14 ADB/MD1-TPIP/EPC150911 MD1-0-V-111-33-00852 A

FOR APPROVAL

0800783INFORMATION

0800783 Issue for information

MD1-0-V-111-33-00852 2 of 22

TABLE OF CONTENT

1.0 PURPOSE ..................................................................................................................... 3

2.0 REFERENCES .................................................................................................................. 3

3.0 CONSIDERATION FOR RELAY SETTING ....................................................................... 3

4.0 COMMENTS ...................................................................................................................... 3

5.0 CALCULATIONS ............................................................................................................... 4

MD1-0-V-111-33-00852 3 of 22

1.0 PURPOSE The purpose of this protection relay co-ordination setting study is to analyze and give the functional settings of the protection relays necessary for the operation of the protection system and for selective clearance of faults for Mong Duong1thermal power plant.

2.0 REFERENCES

1) IEEE Std C37.91: IEEE Guide for Protective Relay Applications to Power Transformers. 2) IEEE Std. C37.102 IEEE Guide for AC Generator Protection. 3) IEEE Std 242: IEEE Recommended Practice for Protection and Coordination of Industrial

and Commercial Power System. 4) IEC International Standard 60255-3 : Electrical Relays part3 Single input energizing

quantity measuring relays with dependent or independent time 5) IEC International Standard 60255-8 : Electrical Relays part8 Thermal electrical relays 6) IEC International Standard 60076-5 : Power Transformer part 5 Ability to withstand short

circuit 7) NEMA MG1-1998 Rev.2 2001 8) SIEMENS 7UM62XX Relay Technical Manual 9) Relay Co-ordination Guide BookKorea Electric Power Corporation

3.0 CONSIDERATION FOR RELAY SETTING

1) 27/59N (100% Stator Earth ground fault Relay) settings are applied after the actual measurement.

2) The permissible Negative sequence constants(K) of the generator is assumed to be 10. (K=10)

4.0 COMMENTS 1) If all of vendor technical data are provided report will be review and revised in the next

revision stage.

MD1-0-V-111-33-00852 4 of 22

5.0 CALCULATIONS

MD1-0-V-111-33-00852 5 of 22

5.1 Generator Protection Relay 1) Basic Information and Data

1-1) Relay Data Relay Maker SIEMENS Relay Model 7UM6225

Function

87G Differential Protection 21G Impedance Protection 32G Reverse Power Protection 40G Under excitation (Loss-of-Field) Protection 46G Unbalanced Load (Negative Sequence) Protection 49S Thermal Overload Protection 81G Frequency Protection 27G Undervoltage Protection 59G Overvoltage Protection 50BF Breaker Failure Protection 24G Over excitation (Volt/Hertz) Protection 59GN 90-%-Stator Earth Fault Protection 27/59TN 100-%-Stator Earth Fault Protection with 3rd Harmonics 60G Fuse Failure Monitor

1-2) Generator Data

Parameter Data Unit Remark Rated MVA 650.52 MVA Power Factor (Overexcited) 0.85 - Direct axis synchronous reactance (Xd) 2.10 PU Saturation Direct axis transient reactance (Xd) 0.225 PU Saturation Direct axis sub-transient reactance (Xd) 0.160 PU Saturation Negative sequence reactance (X2) 0.160 PU - Zero sequence reactance (Xo) 0.140 PU - Rated voltage 21 kV Rated current 17884.7 A Calculation a.

a. Rated current

][ 7.17884213

650520 AINS

MD1-0-V-111-33-00852 6 of 22

2) Protection Diagram

2-1) Device Configuration Parameters address blocks 1

a. Setting group change option

Setting group change option is Enabled Address Parameter Setting Value Remark

0103 0104 0112 0113 0114 0116 0117 0120 0130 0131

Setting Group Change Option Fault values 50/51 Overcurrent Protection I> 50/51/67 Overcurrent Protection I>> 51V Inverse O/C Time Protection 49 Thermal Overload Protection 46 Negative Sequence Protection 87G/87TDifferential Protection 40 Under excitation Protection 32R Reverse Power Protection

Disabled Instantaneous values Disabled Disabled Disabled Enabled Enabled Generator/Motor Enabled Enabled

0132 0133 0140 0141

32F Forward Power Supervision 21 Impedance Protection 27 Undervoltage Protection 59 Overvoltage Protection

Disabled Enabled Enabled Enabled

MD1-0-V-111-33-00852 7 of 22

Address Parameter Setting Value Remark

0142 0143 0144 0150 0151 0152 0154 0155 0160 0165 0166 0170 0171 0180 0181 0182 0185 0186 0187 0188 0189 0190 0191

81 Over / Under frequency Protection 24 Over excitation Protection (U/f) 27 Inverse Undervoltage Protection Up< 59N/67GN Stator Ground Fault Protection 50N/51G Sensitive Ground Current Protection 27/59TN Ground Fault Prot. 3rd Harm. 50N/51G Sensitive Earth Current Protection B Interturn Protection 64 Rotor Ground Fault Protection (R, fn) 48 Motor Starting Time Supervision 66 Restart Inhibit for Motors 50BF Breaker Failure Protection 50/27 Inadvertent Energisation 60FL Fuse Failure Monitor Measured Values Supervision 74TC Trip Circuit Supervision Threshold Supervision External Trip Function 1 External Trip Function 2 External Trip Function 3 External Trip Function 4 External Temperature Input Ext. Temperature Input Connection Type

Enabled Enabled Disabled Non-directional only V0 Disabled Enabled Disabled Disabled Disabled Disabled Disabled Side 2 Disabled Enabled Enabled Disabled Enabled Disabled Disabled Disabled Disabled Disabled 6 RTD simplex operation

2-2) Power System Data address blocks 2


0242 0244 0270 0271 0272

0274A 0276

- Group Power System - Starpoint of Side 1 is Starpoint of Side 2 is Rated Frequency Phase Sequence Scheme Configuration Storage of th. Replicas w/o Power Supply Unit of temperature measurement

Isolated Isolated 50 Hz A B C Direct connected to busbar NO Degree Celsius

0251 0252

0201 0202 0203 0204 0205 0210 211 212 213

221 222 223

224

- Group Generator/Motor Rated Primary Voltage Generator/Motor Rated Apparent Power of the Generator - Group CTs CT-Strpnt. Side1 in Direct. of Object CT Rated Primary Current Side 1 CT Rated Secondary Current Side 1 Correction Angle CT W0 CT Ratio Prim./Sec. Iee1 CT-Strpnt. Side2 in Direct. of Object CT Rated Primary Current Side 2 CT Rated Secondary Current Side 2 CT Ratio Prim./Sec. Iee2 - Group VTs Rated Primary Voltage Rated Secondary Voltage (Ph-Ph) UE Connection VT Ratio Prim./Sec. Neutral VT

21.00 kV 650.52 MVA YES 21000 A 5 A 0.00 60.0 YES 21000 A 5 A 1.0 21.00 kV 110 V VN connected to neutral transformer 87.5

Not relevant

MD1-0-V-111-33-00852 8 of 22


225

280 281

295 296 297

Matching Ratio Ph.-VT to Broken-Delta-VT - Group Breaker Minimum TRIP Command Duration Closed Breaker Min. Current Threshold - Group Transducer Transducer 1 Transducer 2 Transducer 3

1.73 0.15 sec 0.20 A 10V 10V with filter

Not relevantNot relevant

Not relevantNot relevantNot relevant

2-3) Settings for Power system data 2 address blocks 11


1108 Measurement of Active Power for Generator

MD1-0-V-111-33-00852 9 of 22

2-4) Settings for Unbalance load Protection(46G) address blocks 17 a. Setting continuously permissible current calculation

- Setting criterion : Pickup value shall be set at I2 = 8% and K = 10, because generator is cylindrical-rotor generator.

81.621,000

17,884.78II

II I2

prim CT N

Nmach

mach N

machmax 2 [%]

Continuously Permissible current setting is 6.8 [%] b. Setting warning stage time delay(Alarm)

- Setting criterion : Setting value shall be set at 3sec for Alarm

Warning stage time delay is 3 [sec] c. Setting negative sequence factor K calculation

- Setting criterion : Setting value K shall be set at 8, Considering 20% margin .

[s] 5.80)21,000

17884.7(8)II(K K 22

prim CT N

Nmachprimsec

Negative sequence factor K setting is5.8 [s] d. Setting time for cooling down calculation

- Setting criterion : downc Coolt ' value shall be set at according to the manufacturer's recommended formula.

[s] 1,5620.08

10)/I(I

K t 22

Nperm 2

primdownc Cool

Time for cooling down is 1,562 [s] e. Setting 46-2 pickup calculation

- Setting criterion : Pickup value shall be set at 60% of rated current for operating for line-to-line short-circuit fault.

[%] 51.1021,000

17,884.760%II

II I2

prim CT N

mach N

mach N

machmax 2

Continuously Permissible current setting is 51 [%] f. Setting 46-2 time delay

-Setting value shall be set at 3sec.

46-2 time delay setting is 3.00 [sec]

MD1-0-V-111-33-00852 10 of 22

g. Setting Table


1701 1702 1703 1704 1705 1706 1707

46 Negative Sequence Protection 46 Continuously Permissible Current 12 46 Warning Stage Time Delay 46 Permissible Negative Sequence Time K 46 Time for Cooling Down 46-2 Pickup 46-2 Time Delay

ON 6.8 % 3.00 sec 5.8sec 1,562 sec 51% 3.00 sec

2-5) Settings for Differential Protection (87G-1,2) address blocks 20 a. Setting I-Diff> calculation

- Setting criterion

Setting value shall be set at a range that does not operation by the differential current with

CT error and relay error.

CT error : The current of minimum operating current side is very small, so ct error is

ignore.

Relays error : Errors guaranteed by Publisher 5%(Reference by SIEMENS 7UM62 Manual)

Margin : 5%

Relays error + margin = 5.0% + 5.0% = 10.0 [%]

87-1pick-up setting is 0.1I/InO b. Setting I-DIFF> time

- Setting criterion : Correct setting of the minimum possible.

87-1 time delay is 0.00 [sec] c. Setting I-DIFF>> calculation

- Setting criterion :Setting value shall be set at greater than 1/Xd(Transient reactance) of generator.

777.513.0225.01 2-78 I/InO

87-2pick-up setting is 5.8I/InO

MD1-0-V-111-33-00852 11 of 22

d. Setting table


2001 2005

- Group General - 87G/87T Differential Protection 87 Increase of Trip Char. During Start

ON OFF

2021

2026A 2031

2036A

2041A 2042A 2043A 2044A 2051A 2052A 2053

2061A 2062A 2063A

- Group I-Diff - 87-1 Pickup Value of Differential Curr 87-1 T I-DIFF> Time Delay 87-2 Pickup Value of High Set Trip 87-2 T I-DIFF>> Time Delay - Group Characteristic - 87 Slope 1 of Tripping Characteristic 87 Slope 1 of Tripping Characteristic 87 Slope 2 of Tripping Characteristic 87 Base Point for Slope 2 of Charac. 87 I-RESTRAINT for Start Detection 87 Factor for Increasing of Char. At Start 87 Maximum Permissible Starting Time 87 Pickup for Add-on Stabilization 87 Duration of Add-on Stabilization 87 Time for Cross-blocking Add-on Stabiliz.

0.10I/InO 0.00sec 5.8I/InO 0.00sec 0.25 0.00I/InO 0.50 2.50 I/InO 0.10I/InO 1.0 5.0sec 4.00I/InO 15Cycle 15 Cycle

2-6) Settings for Underexcitation (Loss-of-Field) Protection (40) address blocks 30 a. Setting 1/xd CHAR.1 pickup calculation

- Setting criterion :Setting value shall be set at 105% of 1/xd.

Char.1 ].[43.0000,21

7.884,1705.110.21/1 UPXd

Susceptance Intersect characteristic 1 is 0.43 b. Setting Angle 1

- Setting criterion :Setting angle shall be set at 60~80.

Inclination angle of characteristic 1 is 80 [] c. Setting CHAR.1 time delay

- Setting criterion :Setting time shall be set at 2~10 sec.

Characteristic 1 time delay is 5.00 [sec]

MD1-0-V-111-33-00852 12 of 22

d. Setting 1/xd CHAR.2 pickup calculation

- Setting criterion :Setting value shall be set at 90% of CHAR.1.

Char. 2 = ].[ 387.09.043.09.01. UPChar

Susceptance Intersect characteristic 2 is 0.39[P.U] e. Setting Angle 2

- Setting criterion :Setting angle shall be set at 90.

Inclination angle of characteristic 2 is 90 [] f. Setting CHAR.2 time delay

- Setting criterion :Setting time shall be set at 2~10 sec.

Characteristic 2 time delay is 5.0 [sec] g. Setting 1/xd CHAR.3 pickup calculation

- Setting criterion :According to manufacturer recommendations, Setting value shall be set at greater than

1.0[[P.U] and smaller than 1/Xd(Transient reactance) of generator.

].[ 79.3A 000,21V 000,21

V 000,21A 7,884.71

225.01

'1

sec

UPX d

Susceptance Intersect characteristic 3is 3.79[P.U] h. Setting Angle 3

- Setting criterion :Setting angle shall be set at 80~110.

Inclination angle of characteristic 3 is 110 [] i. Setting CHAR.3 time delay

- Setting criterion :Setting time shall be set at manufacturer recommendations.

Characteristic 3 time delay is 0.50 [sec] j. Setting table


3001 3011 3012 3013

3014A

3002 3003 3004 3005 3006 3007 3008 3009 3010

- Group 40 Underexcit. - 40 Underexcitation Protection 40 T-Short Time Delay (Char.&Uexc) 40 State of Excitation Volt. Supervision Excitation Voltage Superv. Pickup Undervoltage blocking pickup - Group Characteristics - 40 Susceptance Intersect Characteristic 1 40 Inclination Angle of Characteristic 1 40 Characteristic 1 Time Delay 40 Susceptance Intersect Characteristic 2 40 Inclination Angle of Characteristic 2 40 Characteristic 2 Time Delay 40 Susceptance Intersect Characteristic 3 40 Inclination Angle of Characteristic 3 40 Characteristic 3 Time Delay

ON oo sec OFF 2.00 V 25.00 V 0.43 80.0 5.00 sec 0.39 90.0 5.0 sec 3.79 110.0 0.50 sec

Not relevant

Not relevant Not relevant

MD1-0-V-111-33-00852 13 of 22

2-7) Settings for Reverse power Protection (32-1G) address blocks 31

a. Setting P> Reverse Pick-up calculation (After obtain data, the recalculation is needed.)

- Setting criterion: Setting value shall be set at less than 50% of the Motoring Power that required for the synchronous speed.

][% 425.021,000

17884.721.021.0%5.0

II

UU%5.0

SP

pri N

mach N

pri N

mach N

SEC N

sec

32R P> Reverse pick-up setting is -0.42 [%] b. Setting time delay

- Setting criterion: Setting time shall be set at 10 sec.

32R Trip delay long is 10.00 [sec] c. Setting table


3101 3102 3103 3104

3105A

32R Reverse power protection 32R P>Pickup 32R Time delay long(without stop valve) 32R Time delay short(with stop valve) 32R Pickup holding time

ON -0.42% 10.00 sec oo sec 0.00 sec

Not active

MD1-0-V-111-33-00852 14 of 22

2-8) Settings for Impedance Protection (21) address blocks 33

a. Setting fault detection I> pickup calculation

- Setting criterion :Setting value shall be set at 125% of the rated current of generator.

][ 32.5000,21525.17.884,17 AI

Fault detection I>is 5.32[A] b. Setting undervoltage seal-in pickup calculation

- Setting criterion: Setting value shall be set at 80% of the rated voltage of generator.

][ 0.888.0110 VV

Undervoltage seal-in pickup is 88.0 [V] c. Setting duration of undervoltage seal-in

- Setting criterion: Setting time shall be set at 4.0 sec. (Z2 operating time + 1.5sec)

Duration of undervoltage seal-in is 4.00 [sec] d. Setting impedance zone Z1 calculation

- Setting criterion: Setting value shall be set at 75% of step-up Tr. impedance.

][ 0.06072021

10013

10075

MVAkV

100u

100kZ

22kR

PRI

KR : Zone reach of zone Z1 in %

Uk : percent impedance voltage of the unit transformer

MD1-0-V-111-33-00852 15 of 22

][ 1.32190.904,2000.060

Ratio VTRatio CTZZ PRISEC

Impedance zone Z1 is 1.32 [] e. Setting impedance zone Z1 time delay

- Setting criterion: Setting time shall be set at 0.5 sec for back up protection of step up Tr.

Impedance zone Z1 time delay is 0.50 [sec] f. Setting impedance zone Z2 calculation

- Setting criterion:

1) Setting value shall be set at 150% of impedance for rated power of generator.

2) Step-up Tr. Impedance + (Next transmission line impedance Apparent Factor) 3) Set as a small value of 1) and 2), but Step-up Tr. Data is not received.

So setting value is1).

][02.15.152.650

215.122

MVAkVZPRI

Impedance zone Z2 is 1.02 [] g. Setting impedance zone Z2 time delay

- Setting criterion: Setting time shall be set at 0.5 sec for back up protection of step up Tr..

Impedance zone Z2 time delay is 2.50 [sec] h. Setting table


3301 3302 3303 3304 3305 3312

3306 3307 3308 3309 3310 3311

- Group General - 21 Impedance Protection 21 Fault Detection I> Pickup 21 State of Undervoltage Seal-in 21 Undervoltage Seal-in Pickup 21 Duration of Undervoltage Seal-in 21 T END: Final Time Delay - Group Zones - 21 Impedance Zone Z1 21 Impedance Zone Z1 Time Delay 21 Impedance Zone Z1B 21 Impedance Zone Z1B Time Delay 21 Impedance Zone Z2 21 Impedance Zone Z2 Time Delay

ON 5.32 A ON 88.0 V 4.00 sec oo sec 1.32 Ohm 0.50 sec 0.99 Ohm oo sec 1.02 Ohm 2.50 sec

Not active

Not active

3313 3314 3315

3316A 3317A

- Group Power swing - Power Swing Blocking Distance betw. Power Swing Trip-Pol. Rate of Change of dZ/dt Power Swing Blocking locks out Power Swing Action Time

OFF 1.60 Ohm 60.0 Ohm/s Zone Z1 3.00 sec

MD1-0-V-111-33-00852 16 of 22

2-9) Settings for Overvoltage Protection (59G) address blocks 41 a. Setting V> Pick-up calculation

- Setting criterion: Setting value shall be set at 120% of the rated voltage of generator.

][0.13220.1000,21

110000,21 VV

V> pick-up setting is 132[V] b. Setting V> time delay

- Setting criterion: Setting operating time shall be set coordination with operating time of

24G function.

V> Time delay is 1.80 [sec] c. Setting table


4101 4102 4103 4104 4105

4106A 4107A

59 Overvoltage Protection 59-1 Pickup 59-1 Time Delay 59-2 Pickup 59-2 Pickup 59 V>, V>> Drop out ratio 59 Measurement values

ON 132V 1.80 sec 140.0 V oo sec 0.95 Voltage protection with V-Phase-Phase

Not active

MD1-0-V-111-33-00852 17 of 22

2-10) Settings frequency Protection (81G) address blocks 42(Requires consultation with the Client)

a. Setting 81-1 Pick-up calculation

- Setting criterion: Setting value shall be set at 49Hz of under frequency function.

81-1 pick-up setting is 49.00 [Hz] b. Setting 81-1 time delay

- Setting criterion: Setting operating time delay shall be set at 1.0sec.

81-1 time delay is 1.00 [sec] c. Setting 81-2 Pick-up calculation


81-2 pick-up setting is 48.00 [Hz] d. Setting 81-2 time delay

- Setting criterion: Setting operating time delay shall be set at 20sec.

81-2 time delay is 20.00 [sec] e. Setting 81-3 Pick-up calculation


81-3 pick-up setting is 47.00 [Hz] f. Setting 81-3 time delay


81-3 time delay is 1.00 [sec] g. Setting 81-4 Pick-up calculation

- Setting criterion: Setting value shall be set at 53Hz of over frequency function.

81-4 pick-up setting is 53.00 [Hz] h. Setting 81-4 time delay


81-4 time delay is 1.00 [sec] i. Setting minimum required voltage calculation

- Setting criterion: Setting value shall be set at 65% of the rated voltage for operating minimum voltage to frequency protection function.

[V] 71.50.6521,000

110000,21Vmin

Minimum required voltage is 71.5 [V]

MD1-0-V-111-33-00852 18 of 22

j. Setting table


4201 4203 4204 4206 4207 4209 4210 4212 4213 4214

4215

81Over/Under frequency protection 81-1 Pickup 81-1 Time delay 81-2 Pickup 81-2 Time delay 81-3 Pickup 81-3 Time delay 81-4 Pickup 81-4 Pickup Time delay 81 Handling of Threshold stage f4 81 Minimum required voltage for operation

ON 49.00 Hz 1.00 sec 48.00 Hz 20.00 sec 47.00 Hz 1.00 sec 53.00 Hz 1.00 sec Freq.prot.stage automatic 71.5 V

Alarm

2-11) Settings for Over excitation(volt/hertz) Protection (24G) address blocks 43 a. Setting 24-1 V/f Pick-up calculation

- Setting criterion: Setting value shall be set at 108% of the rated voltage/hertz for minimum operating .

24-1 V/f pick-up setting is 1.08 b. Setting 24-1 V/f time delay

- Setting criterion: Setting time shall be set at 10secforoperating time in warm stage.

24-1 V/f time delay is 10.00 [sec] c. Setting 24-2 V/f Pick-up calculation

- Setting criterion: Setting value shall be set at 118% of the rated voltage/hertz.

24-2 V/f pick-up setting is 1.18 d. Setting 24-2 V/f time delay

- Setting criterion: Setting time shall be set at 2.0sec.

24-2 V/f time delay is 2.00 [sec] e. Setting V/f time characteristic

- Setting criterion: Setting value shall be set by reference to the short-time over-excitation

curve of manufacturer.

24 V/f=1.15Time delay is 82[sec] 24 V/f=1.20Time delay is 36 [sec]

24 V/f=1.25Time delay is 26 [sec]




MD1-0-V-111-33-00852 19 of 22

f. Setting table


4301 4302 4303 4304 4305

4306 4307 4308 4309 4310 4311 4312 4313 4314

- Group Over excitation - 24 Over excitation protection(U/F) 24-1 V/f> Pickup 24-1 V/f Time delay 24-2 V/f Pickup 24-2 V/f Time delay - Group Characteristics - 24 V/f = 1.05 Time delay 24 V/f = 1.10 Time delay 24 V/f = 1.15 Time delay 24 V/f = 1.20 Time delay 24 V/f = 1.25 Time delay 24 V/f = 1.30 Time delay 24 V/f = 1.35 Time delay 24 V/f = 1.40 Time delay 24 Time for cooling down

ON 1.08 10.00 sec 1.18 2.00 sec 20000 sec 6000 sec 82 sec 36sec 26sec 18sec 5 sec 5 sec 3600 sec

2-12) Settings for Ground fault Protection (27/59TN) address blocks 60 "Address. 6006-6009 " function must be reset to the final correction for elements measured during the field test.


5201 5202 5204 5205 5206

27/59TN Ground Fault Prot. 3rd Harm. 27TN 3rdHamonic Pickup < 27/59TN 3rd H Release Threshould 27/59TN 3.H Release Threshold Pmin> 27/59TN 3.H Release Threshold V 1min >

ON 1.0V 2.0sec 20% 80V

2-13) Settings for Breaker failure Protection (50BF) address blocks 70 a. Setting supervision current pickup calculation

- Setting criterion: Setting value shall be set at 10% of the rated current of generator.

][ 425.0000,2157.178841.0 Pickup 0BF5 A

Supervision current pickup setting is 0.43 [A] b. Setting trip-timer

- Setting criterion: GCB operating time + Lock out relay reset time + margin

Trip-timer is 0.15 [sec]

MD1-0-V-111-33-00852 20 of 22

c. Setting table


7001 7002

7003 7004

50BF Breaker Failure Protection 50BF Start with Internal TRIP command 50BF Supervision Current Pickup 50BF TRIP-Timer

ON Start Breaker Failure with Bin.Outp.12 0.43 A 0.15 sec

2-14) Settings for Measurement Supervision address blocks 81


8101 8102 8103 8104 8105 8104 8105 8108 8109 8110 8111 8112 8113

Measurement Supervision Voltage Threshold for Balance Monitoring Balance Factor for Voltage Monitor Current Balance Monitor Side 1 Balance Factor for Current Monitor S1 Current Balance Monitor Side 2 Balance Factor for Current Monitor S2 Summation Thes. forVolt. Monitoring Factor for Volt. Sum. Monitoring Summated Cur. Mon. Threshold Side1 Summated Current Mon. Factor Side 1 Summated Cur. Mon. Threshold Side 2 Summated Current Mon. Factor Side 2

OFF 50 V 0.75 2.50 A 0.50 2.50 A 0.50 10 V 0.75 0.50 A 0.10 0.50 A 0.10

2-15) Settings for Ground Fault Prot. 59GN address blocks 50 a. Setting Stator Ground Fault Prot pickup calculation

- Setting criterion: Setting value shall be set at 8% of maximum zero Phase voltage,

because 59GN is detection 90% or more of the generator ground fault.

][ 2.1908.0240 VVoper Ground Fault Prot pickup current pickup setting is 19.2 [V]

b. Setting trip-timer

- Setting criterion: Setting time shall be set at 1.5sec.

Trip-timer is 1.5 [sec]

MD1-0-V-111-33-00852 21 of 22

c. Setting table


5001 5002 5005

59G/67GN Stator Ground Fault Prot. 59N V0 Pickup 59N/67GN Time delay

ON 9.6V 1.5sec

2-16) Settings for Thermal Overload Protection (49M) address blocks 16 a. Setting K-Factor calculation

- Setting criterion :Setting value shall be set at 105% of the rated current of motor.

8942.0000,21

7.1788405.1 K 49 K-Factor is 0.89 b. Setting Time constant

- Setting criterion: protection coordination with Stator overload curve.

1) Setting value shall be set at 115% of the rated current and operating time is 89sec.

[SEC] 5.38

]1

000,2193.015.17.884,17

)000,2193.0

15.17.884,17(ln[

89

]

1

)(ln[ 2

2

2

2

N

N

IkI

IkIt

2) Setting value shall be set at 125% of the rated current and operating time is 54sec.

[SEC] 5.73

]1

000,2193.025.17.884,17

)000,2193.0

25.17.884,17(ln[

54

]

1

)(ln[ 2

2

2

2

N

N

IkI

IkIt

3)Set as a small value of 1) and 2).So setting value is1).

Time constant is 37.5 sec

MD1-0-V-111-33-00852 22 of 22

c. Setting 49 thermal alarm stage

- Setting criterion: Setting value shall be set at 125% of the rated current and operating time

is 54sec.

%70.909070.0)05.11()1( 22 Factork 49 Thermal alarm stage is 90% d. Setting Maximum Current for Thermal calculation

- Setting criterion :Setting value shall be set at 3 times of the rated current of generator by reference to the recommendation value of relay manufacturer.

[A] 77.12000,2150.37.884,17THERM. MAX I 49 K-Factor is 12.77 [A] e. Setting table


1601 1602 1603 1604

1610A 1612A 1615A 1616A

1605 1607 1608

- Group 49 - 49 Thermal overload protection 49 K-Factor 49 Time Constant 49 Thermal Alarm Stage 49 Current Overload Alarm Setpoint 49 Kt-FACTOR when motor stops 49 Maximum Current for Thermal Replica 49 Emergency time - Group Temp. Input - 49 Temperature Rise at Rated Sec. Curr. 49 Temperature Input 49 Temperature for Scaling

ON 0.89 37.5 sec 90 % 5.00 A 1.0 12.77 A 100 sec 100 Disabled 100

Not relevant

Not relevant

2-17) Settings for Supervision Functions(60G) address blocks 81


8001 Fuse Fail Mon ON Fuse Failure Monitor

md1-0-v-111!33!00852-a generator protection relay setting calculation

Documents

protection system

g differential protection

g frequency protection

g impedance protection

g undervoltage protection

field protection

g reverse power protection

ac generator protection