Turbine trips

Question 1

State Low Main Shaft Oil Pump Discharge Pressure Trip

Answer 1

100# 2/3, only if Turbine is >1350 RPM

Question 2

State Low Bearing Oil Header Pressure trip

Answer 2

12# 2/3

Question 3

Low EHC pressure trip

Answer 3

1100# 2/3

Question 4

Low ETS trip

Answer 4

> 200# 2/3

Question 5

Loss of Generator Stator winding coolant trip

Answer 5

After 2 min of runback if generator armature current is not less than 25,000 amps or
after 3.5 min of runback if generator armature current is not less than 7,000 amps then the turbine will trip

Question 6

High MSR/ Drain tank level

Answer 6

if level is 3” below top of shell for >10 seconds 2/3 thne the turbine will trip

Question 7

High LP exhaust hood temp

Answer 7

2/3 @ 225F

Question 8

Low Exhaust hood vacuum

Answer 8

2/3 @ 22.4” HgV

Question 9

State Turbine trip on High vibrations

Answer 9

11 mils on 2/2 for >3 seconds

Question 10

State turbine trip on High thrust wear position

Answer 10

2/3 @ 35 mils

Question 11

State turbine trip on Turbine Overspeed

Answer 11

110% or 110.5% primary/emergency overspeed

Question 12

Turbine speed probe failure

Answer 12

Any speed probe failure

Question 13

Discuss Manual turbine trip

Answer 13

Both Manual push buttons on the front standard or MCB