Selenium rectifiers india, Selenium rectifiers manufacturer, Selenium rectifier

Flash Light

Product

Isolating Transformer
(for airfield lighting)

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	2.22E Ve

Centre- tap	VL= 2.22			2.22 Ve
	(E=2nVf)	0.80	48	2.22 Ve

Bridge	VL= 1.11			1.11E Ve
	( E=4nvf)	1.125	48	1.11E Ve


THREE PHASE

Half Wave	VL= 1.48			1.48E Ve
	( E+3nVf)	0.60	18.3	1.48E Ve

Bridge	VL= 0.742			0.742E Ve
	(E+6nVf)	0.80	4.2	0.742E Ve


	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)

Height(W)

F.L

(Cx2) +PXN

Pitch(P)

Spindle

Dia(D)

Projections on both sides mm

100

152

100

381

100

122

100

185

100

32+PxN

20+PxN

45+PxN

51+PxN

2.5

3. 35

5.8

7.1

7.0

8.5

7.0

8.5

9.9

12.2

17.3

9.9

12.2

9.9

12.2

17.3

12.2

17.3

12.2

17.3

9.9

12.2

3/16

3\16

1/4

3/8



Semi Conductors : Selenium Rectifiers \| Thyristors \| Bridge Rectifiers \| Modules \| Silicon Diode