TATA POWER Jojobera U-4 Protocol Turbine Protection
SL NO
DESCRIPTION
TIME DELAY
ALARM VALUE
TRIP VALUE
REMARKS
AUTOMATIC
1
LUBE OIL PR V.LOW (2 OUT OF 3) Release N> 15 rpm (MAV42CP016-018)
TIME DELAY 3 SEC
(MAV42CP019) 2
<2.3 KG/CM2 <2.5 KG/CM2
LIVE STEAM TEMP V.LOW (2 OUT OF 3) <500°C BEFORE SYNCHRONISING
TIME DELAY 56 SEC <330°C (2 OF 3)
<320 C
>500°C AFTER SYNCHRONISING
SPEED >1980 RPM
<480°C (2 OF 3)
<450 C
>370°C
>380°C
SLIDING
SLIDING
>470°C
>480°C
IF SPEED >1980 RPM
<330°C
<320°C
IF LOAD > 37.5 MW
<445°C
<430°C
>90°C
>110°C
(LBA11CT001A-3A) 3
HP EXHAUST TEMP V.HIGH WITH (2 OUT OF 3) HR SURFACE TEMP IF HP Tm<100°C IF HP Tm>100°C& Tm<250°C
REFER CURVE #1
IF HP Tm>250°C (MAA50CT015A-17A,MAA50CT011A-13A) 4
IP I/L STEAM TEMP V.LOW (2 OUT OF 3)
TIME DELAY 56 SEC
(LBB11001A-3A) 5
LP EXHAUST TEMP V.HIGH (2 OUT OF 3) (MAC10CT011A-13A)
6
COND PR V.HIGH WITH (2 OUT OF3) LP INLET PR IF LP INLET PR < 0.7 KG/CM2
TIME DELAY 5MIN
IF LP I/L PR>0.7 KG/CM2&<4.7KG/CM2 (5MIN DELAY)
REFER CURVE #2
IF LP INLET PR >5.0 KG/CM2
IMMEDIATE
<-0.85 KG/CM2 Sliding after LP I/L SLIDING PR 2.2 Kg/cm2 <-0.7 KG/M2
540RPM) (MAG01CP004-006,MAC01CP001-003) 7
AXIAL DISP.V.HIGH (2 OUT OF 3)
IMMEDIATE
(MAD11CY011-013)
SL NO
DESCRIPTION
> +/- 0.5 MM
TIME DELAY
ALARM VALUE
> +/-1.0 MM
TRIP VALUE
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LIVE STEAM TEMP V.HIGH (2 OUT OF 3) HP SURFACE TEMP
REMARKS
