CEP Protection

CEP

START PERMISSIVE

  1.       CEP Suction valve open  AND

            Hotwell level not low (>-250 mm)  2/3  AND                                  

Swgr. available  AND

            Swgr. not disturbed  AND

            Thrust bearing temp  < 100 degc  AND        

            Motor bearing temp. < 85 degc   AND

            Motor winding temp.  < 125 degc  AND                                         

Recirculation valve  40% open  AND

            Vent valve open  AND

            [[CEP Standby selected AND Its disch v/v open ]  OR 

CEP  discharge valve closed ]

2)  TRIP PROTECTION

1)         Hotwell Level very low  ( < - 1850 mm )       2/3

2)         CEP ON AND  Discharge press. low ( < 18 ksc )

3)         CEP ON for 10 sec  AND  Flow through CEP low ( < 300 tph) TD5s

4)         Thrust bearing temp. very high ( > 105 degc)

5)         Motor bearing temp. very high ( > 90 degc)

6)         Motor winding temp. very high ( > 130 degc)

7)         Suction valve not open

8)         Electrical protection acted

3)  AUTO START

1)         Pump Selection  Standby AND

            Other Running pump Tripped

2)         Pump Selection  Standby    AND

            Any other pump  ON for 30 sec  AND

            Discharge header press. low (<20 ksc)

3)         Command from CEP startup sequence step # 103

4)  AUTO STOP

1)         Command from CEP shutdown sequence step # 201

CEP  DISCHARGE VALVE

1)  AUTO OPEN

1)         CEP ON   AND   Discharge press.   > 18 ksc  TD2s

2)         CEP Discharge press.  > 18 ksc   AND 

            Any other CEP ON   AND

            CEP Standby Selected  TD5s

3)         Command from CEP Startup sequence step # 106

2)  OPEN RELEASE

1)         Discharge Valve I.B.V Open

3)  CLOSE RELEASE

1)         CEP OFF

4)  AUTO CLOSE

1)         CEP Standby Selected AND             Discharge hdr. press.  < 20 ksc  TD2m

2)         CEP OFF

3)         Command from CEP Startup sequence step # 102

4)         Command from CEP Shutdown sequence step # 202

5)  DISCHARGE VALVE  I.B.V AUTO OPEN

1)         CEP ON  AND  Discharge press. > 18 ksc  TD2s

2)         CEP discharge press.  > 18 ksc   AND

            Any other CEP ON  AND

            CEP Standby Selected TD5s

6)  DISCHARGE VALVE  I.B.V AUTO CLOSE

1)         Discharge valve opened

CEP  VENT VALVE

1)  AUTO OPEN

1)         CEP discharge press.  > 18 ksc  AND

            Any other CEP ON AND CEP Standby Selected TD5s

2)         CEP OFF

3)         Command from CEP Startup sequence step # 103

4)         Command from CEP Shutdown sequence step # 202

2)  AUTO CLOSE

1)         CEP ON

3)  OPEN RELEASE

1)         CEP OFF