Insel Rectifiers- Semi Conductors, Rectifiers, Diodes, Thyristors, Selenium
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Selenium Rectifiers

 

Circuit
Formula
AC\DC
Current
Ratio (1)
Ripple 
Percent(2)
n (Approx)
         
  SINGLE PHASE
         
  Half Wave
VL= 2.22
2.22E

Ve
( E+nVf)
1.57
121 
  Centre- tap
VL= 2.22
2.22

Ve
(E=2nVf)
0.80
48  
  Bridge
VL= 1.11
1.11E

Ve
( E=4nvf)
1.125
48
 
  THREE PHASE
         
  Half Wave
VL= 1.48
1.48E

Ve
( E+3nVf)
0.60
18.3
  Bridge
VL= 0.742
0.742E

Ve
(E+6nVf)
0.80
4.2
     
  VL  =  on – load a.c. input voltage ( total secondary  voltage for single phase center – tap line- to line for three phase half wave and bridge)  
   
  E= mean d.c. output voltage .  
   
  Vf=  mean element forward voltage drop.  
   
  N= number of series elements .  
   
  Ve= Voltage of plate  
   
 

(1) =

a.c. input curre

d.c. output current
 
   
 
(2) 
a.c. ripple voltage – r.m.s. x 100

mean d.c. output voltage
 
     

Plate

Type

Mech

structure

Fig.

Ref.

Width(W)

mm

Height(W)

mm

F.L

(Cx2) +PXN

Pitch(P)

mm

Spindle

Dia(D)

      E

Projections on  both sides mm

C

D

E

F

G

K

M

Q

R

Y

S

N

T

P

L

L

LA

L

L

L

LA

L

LA

L

LA

L

LA

L

LA

L

LA

L

LA

L

LA

L

LA

L

LA

L

 

6

6

6

4

6

2

2

4

4

2

2

5

5

5

5

5

5

2

2

4

4

5

5

1

1

17

23

23

36

36

50

50

50

50

76

76

62

62

76

76

83

83

100

100

152

152

100

100

381

381

32

35

35

35

48

68

68

100

100

100

100

122

122

122

122

122

122

122

122

100

100

185

185

100

10

32+PxN

32+PxN

32+PxN

32+PxN

32+PxN

20+PxN

20+PxN

20+PxN

20+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

45+PxN

51+PxN

51+PxN

2.5

3. 35

5.8

5.8

7.1

7.0

8.5

7.0

8.5

9.9

12.2

12.2

17.3

9.9

12.2

9.9

12.2

12.2

17.3

12.2

17.3

12.2

17.3

9.9

12.2

3/16

3\16

3\16

3\16

3\16

1/4

1/4

1/4

1/4

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

3/8

 

10

10

10

10

10

15

15

15

15

20

20

20

20

20

20

20

20

20

20

20

20

20

20

20

20

N
=
Number of plates in stack
F.L.
=
Fixing Length
C
=
End assembly length
P
=
Plate Distance

RECTIFIERS WITH 4 OR LESS THAN 4 PLATES SHALL BE SCREW / BOLT MOUNTED