Energy Tab

220V DC FAILURE IDENTIFICATION: Boiler and Turbine will trip. 220V DC failure alarm will appear in facia & DCDB voltage will read 0V Generator will start motoring & motoring alarm will appear. CONSEQUENCES:   Boiler will trip on “ 220V DC failure ” protection by FSSS. HOTV & LOTV will close. All running mills CAD’S & HAG’S will close. All running mills feeders will trip . SADC will full open . All HT ( 11kv & 3.3kv) drives will continue to run . All mills, PA fans, CC pumps, ID&FD fans will continue to run . Turbine will trip on boiler trip protection through MFT. all stop valves & control valves will close . TDBFP A&B will trip. MDBFP if not in service will not take start. Extraction FC NRV will close. Vacuum breaker remains close. Generator will start motoring & will not trip (All electrical protection will not work) Field breaker inoperative. All HT breakers protection is not available. All ...

POST SHUTDOWN IMMEDIATE UCB OPN  1. Check & ensure GCB IS open. 2. Check & ensure Starting of AOP of main turbine after 2850 RPM. 3. Ensure HPT evacuation valve opens after turbine tripped provided condenser vacuum is better than - 0.4ksc and closes at 2000 rpm. 4. Put FRS low level controller in service and maintain drum level. In case of difficulty in maintaining drum level or at low CC pump DPs, CC pumps may be tripped . 5. Maintain Furnace Pressure & Put Master in auto. 6. Check & ensure All ESVs, & IVs and HPCVs & IPCVs get closed. 7. Maintain Seal Steam Pressure for maintaining Vacuum. Close Leak-off bypass if open. Keep watch on seal steam temperature. 8. Raise turbine oil temperature set point to 60 o C during turbine coasting down & maintain temp. If needed, isolate MOT cooler. 9. Check & ensure CRH NRV and All Extraction V/Vs get closed. 10. Maintain Hot well & D/A levels. 11. Check & ensure Starting of JOP (510RPM) and Barring ge...

Main Turbine Oil Injection Procedure Communicate to senior persons such as AGM(O) & AGM(MM ) regarding the test  plan. Ensure the presence of TMD person near Governing rack at 17 Mtr. Rotate the knob of Governing rack filter ( daily once in Evening shift)    Open the Top cover of pilot valves KA02 and KA03 of MAX62AA001 . Press the pilot valve KA02 fully and observe the Aux. start-up fluid pressure is developing or not . lf pressure is ok , slowly release the valve . If the pressure does not build-up, abort the test. Release the valve after checking .Inform to TMD. Press the pilot valve KA03 fully to isolate the Auxiliary trip fluid (going to over speed bolts through over speed trip test device) from main trip valve and keep in pressed down till the completion of the test . Note down the Auxiliary trip fluid pressure Rotate the hand wheel KA01 of over-speed trip test device in clockwise direction for admitting the test fluid to the over speed...

TDBFP Oil Injection Test Procedure Communicate  to senior persons such as  AGM (O) & AGM (TMD)  regarding the test plan. Ensure the  presence of TMD person near TDBFP Governing rack  at 17 Mtr. Ensure that  MDBFP  is in  auto  and its start permissive is  available . TDBFP  speed  should be  greater than 5300 rpm  and it may be  increased through  biasing.  During biasing  care has to be taken  that  other TDBFP may not get unloaded. First of all Press the Test Valve lever and lock it by rotating hand wheel in clockwise  direction . It will isolate the trip fluid ( going to over speed bolts through the test valve ) from main tripping device and keep in pressed condition till the completion of the test   Open the manual isolating valve of test oil line . Now slowly increase the test oil pressure through test oil regulating valve. When test oil ...

PROCEDURE FOR PERFORMING OVERSPEED TRIP OIL INJECTION TEST FROM LOCATION: STEP-1: Press the RHS knob and ensure build up of startup oil pressure (>8.5 ksc), Note down and release the lever. STEP-2: Press the LHS Knob and hold it in the pressed condition till completion of test. Not down Aux trip fluid pressure (>5.0 ksc). STEP-3: Rotate the testing device hand wheel in clock wise direction to build test oil pressure. STEP-4: Note down the test oil pressure at which the Over speed trip device strikers act, Aux trip fluid pressure (0 ksc) and primary oil pressure. STEP-5: Rotate the testing device hand wheel in anti clock wise direction to reduce test oil pressure till 0 ksc. STEP-6: Press the RHS knob to buildup startup oil pressure and reset the trip device and then release it after ensure resetting of both strikers. STEP-7: Release the LHS knob and note down Aux. trip fluid pressure (>8.5 ksc). Resp: UCE PROCEDURE FOR ACTUAL OVERSPEED ...