Operations

Question 1

SNLNE Sequence 1

Answer 1

Initial condition OK

Question 2

SNLNE Sequence 2

Answer 2

Apply Brakes
Unit Cooling sys starte
GSU trf oil station started
Carbon dust exhauster started
Oil injection system started
Oil mist exhauster started

Question 3

SNLNE Sequence 3

Answer 3

Gov oil station started
MIV oil station started

Question 4

SNLNE Sequence 4

Answer 4

MIV opening Sequence as follows
1. Activate complete opening TLTE > MIV oil station on > Wicket gate opened
2. Open By pass valve
3. MIV open
4. CLose By pass valve
5. Reset complete opening TLTE

Question 5

SNLNE Sequence 5

Answer 5

Brakes released
No braking residual press

Question 6

SNLNE Sequence 6

Answer 6

Turbine speed > 90%

Question 7

SNLNE Sequence 7

Answer 7

Turbine safety device in service
Oil injection sys stopped

Question 8

SNLE Sequence 8

Answer 8

Excit FB closed & not open
Excit power factor regul off
Gen nominal voltage

Question 9

SNLE Sequence 9

Answer 9

Synchro auto selected
Unit CB closed & not open

Question 10

SNLE Sequence 10

Answer 10

Excit power factor regul ON

Question 11

NSD 1

Answer 11

Speed Gov pulse ctrl mode off
wicket gate opening < SNL

Question 12

NSD 2

Answer 12

Unit CB open & not closed

Question 13

NSD 3

Answer 13

Excit FB open & not closed

Question 14

NSD 4

Answer 14

Stop governor
Seq closing MIV
Turbine speed <90%

Question 15

NSD 5

Answer 15

Injection sys started
Tur safety device out of service
Wicket gate closed
Turbine speed < 15%

Question 16

NSD 6

Answer 16

Brakes applied
MIV closed
Unit speed <0.5%

Question 17

NSD 7

Answer 17

MIV oil station stopeed
Gov oil station stopped
Unit cooling sys stopped
Oil Injection sys stopped
Oil mist exhauster off
Carbon dust exhauster off
GSU trf oil sys stopped
Brakes released