Turbine Start up
1.Control values for axial displacement (the rotor being positioned by working pad, the movement of rotor toward generator is plus, the opposite is minus
Alarm value +0.6 -1.05mm
Shut down value +1.2 – 1.65mm
2.Control value for bearing vibration
(2.1) Vibration on bearing cover (peak-peak value)
a. Normal value ≤ 0.03mm
b. Alarm value 0.05mm
c. Shut down value 0.08mm .
(2.2) Shaft vibration (peak – peak value)
a. Normal value ≤ 0.076mm
b. Alarm value 0.125mm
c. Shut down value 0.25mm
3.Control values for oil pressure
(3.1) Normal value of mail oil pump outlet pressure 1.8MPa (17.7kgf/cm2)
(3.2) Lubricating oil pressure
Normal value 0.0785 ~ 0.118MPa (0.8 ~1.5kgf/cm2)
Alarm value 0.049 MPa (0.5kgf/cm2) automatically start up AC lube oil pump
AC oil pump starts automatically when turbine speed falls below2850rpm or Main oil pump discharge oil pressure low ≤ 1.8MPa
Turbine Shutdown value 0.039MPa(0.4kgf/cm2) automatically start up DC emergency oil pump
Value for stopping turning gear 0.03MPa (0.31kgf/cm2)
(3.3) EH anti-burning oil pressure
a. Normal value 13~14MPa
b. Alarm value 11.2 MPa
c. Shut down value 7.8MPa
4.Control values for oil temperature
normal value of bearing inlet oil 40～45℃
normal value of bearing housing return oil ＜65℃
alarm value of bearing housing return oil 65℃
shut down value of bearing housing return oil 75℃(manual)
EH oil temperature 40℃±5℃
5.Temperature of bearing tungsten metal
Temperature of support bearing tungsten metal
Alarm value 105 °C
Shutdown value 115 °C (manual)
Temperature of thrust bearing tungsten metal
Alarm value 100 °C
Shutdown value 110 °C
6.Oil level in oil tank (indicating value of oil indicator)
The max oil level +200mm
The alarm value of min oil level -180mm
The shut down value of min oil level -230mm
7.Condenser pressure
Normal value 0.015Mpa (0.147kgf/cm2)
Alarm value >0.05Mpa (0.49Kgf/cm2)
Shutdown value 0.055MPa (0.539kgf/cm2)
8.The unit is allowed to operate with30% ~ 100% load for long time.
The operation time in which the unit carries plant load after the trip-out should not exceed 15 minutes. And this operation should not exceed once a year. This operation mode will considerably consume the lifetime of the unit. It is better to avoid adopting this mode, except absolutely necessary.
The no load operation time after trip-out of the unit should not exceed 15 min, and this operation should not exceed once a year.
Usually, the unit is not allowed to operate in electric motor mode. In case it is absolutely required, this mode of operation can only be performed once a year, on condition that the back pressure is less than 0.05MPa and temperature of exhaust casing less than 85 °C
Each time of this operation is not to exceed 1 min.
9. Pressure limits for each section of steam extraction port and regulating stage.
10. Stop the unit if steam temperature goes less than 450°C
