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Tg & blr protect

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tg protect

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Tg & blr protect

  1. 1. 20th January 2004 Date: 10th Jan 2004 Place: CPP Control Room A meeting was called on to discuss regarding the restoration of Protections of Turbines and Boilers. The following members were present during the meetings to discuss about the above subject and concluded to restore the following protections of turbines & Boilers with the values enclosed in a tabular form as below, the same will be implemented by Automation on a case-to-case basis at the earliest opportunity For CPP For Automation Sh.D.Bangabash Sh.H.P.Nanavati Sh.G.G.Goud Sh.Ajay Verma Sh.T.P.Krishnan Sr.GM (Elect) was also present and gave clearance for generator protections D.Bangbash Cc EP/JEP Sr.GM (Elect)/DGM (Elect) DGM (Auto) All Member Present
  2. 2. Protection for TG-1 (24.5 MW)
  3. 3. Protection for TG-1 (10.5 MW) Sr.No Particulars Alarm (Values) Trip (Values) 1 Turbine Front Shaft Vibration 120 microns 160 microns 2 Turbine Rear Shaft Vibration 120 microns 160 microns 3 Gear Box High Speed 120 microns 160 microns 4 Gear Box Low Speed 135 microns 180 microns 5 Generator Front 135 microns 180 microns 6 Generator Rear 135 microns 180 microns 7 Differential Expansion 1.2 mm  -0.8 mm 1.2 mm  -0.8 mm 8 Axial Shift 1.2 mm  -0.8 mm 1.2 mm  -0.8 mm 9 Hot Well Level Level Switch 10 Generator Trip Not Applicable 11 Extraction –1 Pressure 17 kg / cm² 22 kg / cm² 12 Extraction –2 Pressure 08 kg / cm² 11 kg / cm² 13 Turbine Speed High ≥ 5850 rpm ≥ 6050 rpm 14 Turbine Front Active Temp (Top) ≥ 100 ° C ≥ 120 ° C 15 Turbine Front Active Temp (Bot) ≥ 100 ° C ≥ 120 ° C 16 Turbine Front inactive Temp (Top) ≥ 100 ° C ≥ 120 ° C 17 Turbine Front Inactive Temp (Bot) ≥ 100 ° C ≥ 120 ° C 18 Turbine Front Journal Bearing ≥ 100 ° C ≥ 120 ° C 19 Turbine Rear Journal Bearing ≥ 100 ° C ≥ 120 ° C 20 Gear Box High Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 21 Gear Box Low Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 22 Gen Front Bearing Temp ≥ 100 ° C ≥ 120 ° C 23 Gen Rear Bearing Temp ≥ 100 ° C ≥ 120 ° C 24 Trip Oil Pressure ≤ 7.0 kg/cm ² ≤ 6.0 kg/cm ² 25 Lube Oil Pressure ≤ 1.2 kg/cm ² ≤ 0.8 kg/cm ² 26 Condenser Vacuum ≤ - 0.80 kg/cm ² ≤ - 0.5 kg/cm ²
  4. 4. Protection For TG- 2.85 MW Sr.No Particulars Alarm (Values) Trip (Values) 1 Turbine Front Shaft Vibration ≥ 120 μ ≥ 160 μ 2 Turbine Rear Shaft Vibration ≥ 120 μ ≥ 160 μ 3 Gear Box High Speed ≥ 140 μ ≥ 180 μ 4 Gear Box Low Speed ≥ 140 μ ≥ 180 μ 5 Generator Front ≥ 140 μ ≥ 180 μ 6 Generator Rear ≥ 140 μ ≥ 180 μ 7 Differential Expansion 1.2 mm  -0.8 mm 1.2 mm  -0.8 mm 8 Axial Shift > + 0.5 mm < - 0.5 mm > + 0.8 mm < - 0.8 mm 9 Hot Well Level Level Switch 10 Generator Trip Not Applicable 11 Turbine Speed High > 5650 rpm ≥ 5850 rpm 12 Turbine Front Active Temp (Top) ≥ 100 ° C ≥ 120 ° C 13 Turbine Front Active Temp (Bot) ≥ 100 ° C ≥ 120 ° C 14 Turbine Front inactive Temp (Top) ≥ 100 ° C ≥ 120 ° C 15 Turbine Front Inactive Temp (Bot) ≥ 100 ° C ≥ 120 ° C 16 Turbine Front Journal Bearing ≥ 100 ° C ≥ 120 ° C 17 Turbine Rear Journal Bearing ≥ 100 ° C ≥ 120 ° C 18 Gear Box High Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 19 Gear Box Low Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 20 Gen Front Bearing Temp ≥ 100 ° C ≥ 120 ° C 21 Gen Rear Bearing Temp ≥ 100 ° C ≥ 120 ° C 22 Trip Oil Pressure ≤ 7.0 kg/cm ² ≤ 6.0 kg/cm ² 23 Lub Oil Pressure ≤ 1.2 kg/cm ² ≤ 0.8 kg/cm ² 24 Condenser Vacuum ≤ - 0.80 kg/cm ² ≤ - 0.5 kg/cm ²
  5. 5. Protection For TG- 12.5 MW Sr.No Particulars Alarm (Values) Trip (Values) 01 Turbine Speed High > 6400 rpm ≥ 6600 rpm 02 Turbine Front Active Temp (Top) ≥ 100 ° C ≥ 120 ° C 03 Turbine Front Active Temp (Bot) ≥ 100 ° C ≥ 120 ° C 04 Turbine Front inactive Temp (Top) ≥ 100 ° C ≥ 120 ° C 05 Turbine Front Inactive Temp (Bot) ≥ 100 ° C ≥ 120 ° C 06 Turbine Front Journal Bearing ≥ 100 ° C ≥ 120 ° C 07 Turbine Rear Journal Bearing ≥ 100 ° C ≥ 120 ° C 08 Gear Box High Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 09 Gear Box Low Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 10 Gen Front Bearing Temp ≥ 90 ° C ≥ 120 ° C 11 Gen Rear Bearing Temp ≥ 90 ° C ≥ 120 ° C 12 Trip Oil Pressure ≤ 7.0 kg/cm ² ≤ 6.0 kg/cm ² 13 Lub Oil Pressure ≤ 1.2 kg/cm ² ≤ 0.8 kg/cm ² 14 Back Pressure ≥ 28 kg/cm ² ≥ 34 kg/cm ²
  6. 6. Sr.No Particulars Alarm (Values) Trip (Values) 1 Vacuum Pressure ≤ - 0.75 kg/cm ² ≤ - 0.5 kg/cm ² 2 Inlet Steam Temp Low ≤ 350 ° C ≤ 300 ° 3 Hot well Level ≥ 70 % ≥ 90 % 4 Generator Trip Not Applicable 5 Turbine Front Active Temp (Top) ≥ 100 ° C ≥ 120 ° C 6 Turbine Front Active Temp (Bot) ≥ 100 ° C ≥ 120 ° C 7 Turbine Front inactive Temp (Top) ≥ 100 ° C ≥ 120 ° C 8 Turbine Front Inactive Temp (Bot) ≥ 100 ° C ≥ 120 ° C 09 Turbine Front Journal Bearing ≥ 100 ° C ≥ 120 ° C 10 Turbine Rear Journal Bearing ≥ 100 ° C ≥ 120 ° C 11 Gear Box High Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 12 Gear Box Low Speed Brg Temp ≥ 100 ° C ≥ 120 ° C 13 Gen Front Bearing Temp ≥ 95 ° C ≥ 120 ° C 14 Gen Rear Bearing Temp ≥ 95 ° C ≥ 120 ° C 15 Lube Oil Pressure ≤ 1.5 kg/cm ² ≤ 1.0 kg/cm ² 16 Turbine Over Speed ≥ 6600 rpm ≥ 7150 rpm
  7. 7. Boiler Protection (CFBC Boiler) Sr.No Particulars Alarm Trip 1 Furnace Draft (Low) < -90 mmWC < -150 mm WC 2 Furnace Draft (High) ≥ +75 mmWC ≥+100 mm WC 3 Bed Temperature > 880 °C > 975 °C 4 Drum Level Low ≤ -150 mm ≤ -325 mm 5 Drum Level High ≥ +100 mm ≥+ 250 mm Boiler Protection (AFBC Boiler) Sr.No Particulars Alarm Trip 1 Furnace Draft (High) ≥ 6 mmWC ≥ 30 mm WC 2 Drum Level Low ≤ 35 % ≤ 25 %

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