VSP Chiller Motor data sheet and Calculations 29.05.10.

SIEMENS 6.6KV_SP3 1/7

338HP 6.6KV Condensor Water Pump Motor (6.6KV Vac. Contactor) TECO Motor Data Input CT Pri A CT Sec A Relay In FLC (A) HP k t-start Istart KW Duty SI

50 1 1 24.4 338 0.49 3.5 7 FLC 252.15 1.05PF 0.91 Efficiency 0.945 LRC (A) 170

Starting Time in Sec 80% Volts 100% V Safe stall time in s 100% RV 80% RV Permitted No of StartsWith load - 3.5 Hot condition 20 31 Hot ColdWith out load(driven equip coupled) Cold condition 46 72 1 2

Relay 7SJ 61 (Siemens)46 Unbalance Protection. Addr SettingsFCT 46 4001 ON46-1 settingContiniously permissible -ve sequence current 11% 0.05368 (set 0.1A min available)46-1 PICKUP (min. Available setting 0.1) 0.1 This corresponds to 20.49% 4002 0.1 A46-1 DELAY 20 sec Alarm 4003 20 sec DT46-2 PICKUP 0.20 A 4004 0.20 A46-2 DELAY 3 sec 4005 3 sec DT

E/F Protection. (50N)Ie> PU (50N-2 PICKUP) 0.488 say 0.5 1302 0.5 ATIe>Time Delay (50N-2 DELAY) 1303 0.01 sec DTIe> PU (50N-1 PICKUP) 0.0488 say 0.05 1304 0.05 ATIe>Time Delay (50N-1 DELAY) 1305 0.2 sec DT

Short Ckt Protection (50) By 100A Fuse

U/V Protection (27)27-1 pu (Fom BPT U/V Relay) 88 V27-1 delay 1.2 s

Starting Protection 48, Restart Inhibit 66 141 EnabledNominal Current Motor 24.4Starting Current 170At 80% Voltage start up current is reduced to 2.72 from motor data sheet.FLC 0.488Max Load current 0.5124I MOTOR START (detection of a motor startup) 1.604 1.6 (say) 1107 1.6 A

VSP Chiller Motor data sheet and Calculations 29.05.10.

SIEMENS 6.6KV_SP3 2/7

FCT 48 (Starting time supervision) 4101 ONStart Up Current 3.4 4102 3.4 AStart up Time 5.5 4103 5.5 sPermissible Locked Rotor Time 17 4104 17 sSTARTUP T WARM 5.5 4105 5.5 sTEMP.COLD MOTOR 50.00% 40% (say) 4106 40%FCT 66 (Restart inhibit for motors) 4301 ONIstart/In 6.97 4302 6.97T START MAX 15 4303 15 sT Equal (Temp equalisation Time-motor cannot be started) 1 (default setting) 4304 1 minI motor nominal 0.49 4305 0.49 AMax Warm Starts 1 4306 1#COLD - # WARM 1 4307 1

5 4308 52 4309 2

T min inhibit 6 4310 6 min

Load Jam Prot 4401 ONLoad Jam I> = 2 x IFLC x (CT Sec / CT Pri) 0.98 4402 0.98 ATrip Delay 1 4403 1 sT START Block 7 4406 7 s

Thermal Overload Protection 49FCT 49 4201 ON49 K-FACTOR 0.49 say = 0.49 4202 0.49TIME CONSTANT 16.18069 set 10 For Grading 4203 1049 Θ ALARM 90% 4204 90%I ALARM 0.49 4205 0.49

1 4207A 1T EMERGENCY 100 4208A 100

K t at stop K t at running

Kt-FACTOR

VSP 6.6KV Chiller Motor 29.05.10.

SIEMENS Motor TW data From Motor data sheet 3/7

Thermal withstand curve 6.6KV Chiller Motor.FLC Times FLC Act Amp Cold WT Times FLC Act Amp Hot WT24.4 1.125 27.45 1.125 27.4524.4 1.5 36.6 3000.00 1.5 36.624.4 1.75 42.7 800 1.75 42.724.4 2 48.8 360 2 48.824.4 2.5 61 150 2.5 6124.4 3 73.2 85 3 73.224.4 3.5 85.4 60 3.5 85.424.4 4 97.6 46.00 4 97.624.4 4.5 109.8 37 4.5 109.824.4 5 122 30.90 5 12224.4 5.5 134.2 27 5.5 134.224.4 6 146.4 24 6 146.424.4 6.5 158.6 21.5 6.5 158.624.4 7 170.8 20 7 170.8

VSP 6.6KV Chiller Motor 29.05.10.

SIEMENS Starting Trip Time 4/7

Start Up data Chiller Motor

CT In 50 AI MOTOR START 1107 1.6 InStart Up Current 4102 3.4 InStart up Time 4103 5.5 sec

Data for Start up current plotting.In Irms I start up T Startup t in sec50 80 170 5.5 24.84

100 170 5.5 15.89120 170 5.5 11.04136 170 5.5 8.59150 170 5.5 7.06160 170 5.5 6.21170 170 5.5 5.5

VSP 6.6KV CHILLER Motor. 29.05.10.

SIEMENS Relay Trip Time without Preload 5/7

CT Pri CT sec FLC of Setting Actual Motor A / Heating up Trip TimeCurrent Current Motor Factor Motor FLC T,C. min Trip Time

In pri In sec Inom k Current (I/K*Inom) (I/K*Inom)^2 (I/K*Inom)^2-1 LN(H/I) t = t = (J*K) min Sec50 1 24.4 0.49 24.4 1.00 1 1 0 #DIV/0! 10 #DIV/0! #DIV/0!50 1 24.4 0.488 30.5 1.25 1.25 1.56 0.56 1.02 10 10.22 612.9950 1 24.4 0.488 36.6 1.5 1.50 2.25 1.25 0.59 10 5.88 352.6750 1 24.4 0.488 42.7 1.75 1.75 3.06 2.06 0.40 10 3.95 237.1950 1 24.4 0.488 48.8 2 2.00 4.00 3.00 0.29 10 2.88 172.6150 1 24.4 0.488 54.9 2.25 2.25 5.06 4.06 0.22 10 2.20 132.0450 1 24.4 0.488 61 2.5 2.50 6.25 5.25 0.17 10 1.74 104.6150 1 24.4 0.488 67.1 2.75 2.75 7.56 6.56 0.14 10 1.42 85.1050 1 24.4 0.488 73.2 3 3.00 9.00 8.00 0.12 10 1.18 70.6750 1 24.4 0.488 79.3 3.25 3.25 10.56 9.56 0.10 10 0.99 59.6850 1 24.4 0.488 85.4 3.5 3.5 12.25 11.25 0.09 10 0.85 51.0950 1 24.4 0.488 97.6 4 4.00 16.00 15.00 0.06 10 0.65 38.7250 1 24.4 0.488 109.8 4.5 4.50 20.25 19.25 0.05 10 0.51 30.3950 1 24.4 0.488 122 5 5.00 25.00 24.00 0.04 10 0.41 24.4950 1 24.4 0.488 134.2 5.5 5.50 30.25 29.25 0.03 10 0.34 20.1750 1 24.4 0.488 146.4 6 6.00 36.00 35.00 0.03 10 0.28 16.9050 1 24.4 0.488 158.6 6.5 6.50 42.25 41.25 0.02 10 0.24 14.3750 1 24.4 0.488 170.8 7 7.00 49.00 48.00 0.02 10 0.21 12.37

Calculation for Trip Time without pre-load Chiller Motor

VSP 6.6KV CHILLER Motor. 29.05.10.

SIEMENS Relay Trip Time without Preload 6/7

VSP 6.6KV Chiller Motor_SP3 29.05.10.

SIEMENS Starting_ TW Relay_ Motor Curves 7/7

20 40 60 80 100 120 140 160 180 2001.00

10.00

100.00

1000.00

10000.00

Motor Current in Amps

Tim

e i

n s

ec

Motor TW Cold

Curve

Relay Cold

Curve

Relay Startup Curve