DRPI

Question 1

Describe DRPI

Answer 1

• 42 coil assemblies split into two groups (21 A coils, 21 B coils)
• as stainless steel rod drive shaft passes between coil, impedance changes (resis->up, current->down)
• coil info sent to data cabinet (A or B)(53 encoder cards, one per Rod)(cabinet A for A coils……)
• data cab info->3 central control cards
• every six steps, LED’s moves

Question 2

What is accuracy of DRPI?

Half accuracy?

Answer 2

+/- 4 steps, both coils

A only= +4, -10 steps

B only= -4, +10 steps

Question 3

How many coils penetrated when rods fully inserted into core?

Answer 3

2 coils per Rod ===> 106 (53 x 2)

Question 4

Power supply to DRPI?

Answer 4

F , normal

G, backup

Question 5

What does top LED mean

Answer 5

General warning urgent and non-urgent conditions