TURBINE PROTECTION | ||||||||||||
1) TG Lub oil pressure very low (< 1.2 ksc) | ||||||||||||
2) Axial shift high (+/-1.0mm) | ||||||||||||
3) HP exhaust temp. high (> 500 degc) | ||||||||||||
4) Condenser vaccum low(VSP) | ||||||||||||
5) Condenser vaccum low(FSP) (> -0.7 ksc) AND Turbine speed > 240 rpm | ||||||||||||
6) HP casing top/btm DT high (> 100 degc) AND Load >100MW | ||||||||||||
7) IP casing front top/ btm DT high (> 45 degc) AND Load >100MW | ||||||||||||
8) IP casing rear top/ btm DT high (> 45 degc) AND Load >100MW | ||||||||||||
9) MFT S/W & H/W | ||||||||||||
10) Generator electrical protection S/W & H/W | ||||||||||||
11) Liquid in Generator Main leads top (> 90 mm) | ||||||||||||
12) Cold gas temp after cooler A&B high (> 60 degc) | ||||||||||||
13) Cold gas temp after cooler C&D high (> 60 degc) | ||||||||||||
14) Primary water temp after cooler high (> 71 degc) | ||||||||||||
15) Seal oil temp after cooler high (> 55 degc) | ||||||||||||
16) Hot air main exciter temp high (> 80 degc) | ||||||||||||
17) Stator winding flow very low (< 48 tph) | ||||||||||||
18) Stator Main bushing R flow low (< 1.33 tph) | ||||||||||||
19) Stator Main bushing S flow low (< 1.33 tph) | ||||||||||||
20) Stator Main bushing T flow low (< 1.33 tph) | ||||||||||||
21) Turbine over speed trip (electrical) (> 3330 rpm) | ||||||||||||
22) Turbine over speed trip H/W | ||||||||||||
23) Oil tank level very low ( 1150 mm from top) | ||||||||||||
24) Turbine trip from desk operated | ||||||||||||
25) Turbine trip from console operated | ||||||||||||
26) Turbine trip from ATRS | ||||||||||||
27) Emergency trip from HMI | ||||||||||||
28) Fire protection 1 or 2 operated | ||||||||||||
29) Generator class B protection | ||||||||||||
30) Low Vacuum Trip Device operated | ||||||||||||
31) Manual Trip Device operated | ||||||||||||
1.2) ALARM LIMITS | ||||||||||||
1) TG Lub oil pressure very low (< 4.5ksc) | ||||||||||||
2) Axial shift high (+/-0.5 mm) | ||||||||||||
3) HP exhaust temp. high (> 485 degc) | ||||||||||||
4) Condenser vaccum low (FSP) (> -0.8 ksc) | ||||||||||||
5) HP casing top/btm DT high (> 90 degc) | ||||||||||||
6) IP casing front top/ btm DT high (> 30 degc) | ||||||||||||
7) IP casing rear top/ btm DT high (> 30 degc) | ||||||||||||
8) Cold gas temp after cooler A&B high (> 55 degc) | ||||||||||||
9) Cold gas temp after cooler C&D high (> 55 degc) | ||||||||||||
10) Stator winding flow very low (< 54 tph) | ||||||||||||
11) Stator Main bushing R flow low (< 1.4 tph) | ||||||||||||
12) Stator Main bushing S flow low (< 1.4 tph) | ||||||||||||
13) Stator Main bushing T flow low (< 1.4 tph) | ||||||||||||
14) Turbine over speed (> 3300 rpm) | ||||||||||||
Thursday, May 10, 2018
TURBINE PROTECTION
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