Answer / a.p

the thyristor will conduct in the forward direction and in
the reverse direction, it will show reverse recovery
voltage, thus a high resistance. Or we may put a diode in
parellel with the thyristor. The current gets diveded when
the thyristor is conducting. Else all the current flows
through the diode alone. In this way the thyristor could be
checkd.

Answer / saurabh

u can not test by ohmic value. u can test by bulb ,put in a
series. then u can test.sometimes ohmic value is worng.

Answer / engineering.force

initially increase the voltage across the anode-cathode
terminals of the thyristor. and note the value of current.
the current will be zero when scr is not fired. after a
certain value of voltage it will start conducting, the
current through the scr will start to increase and, the
voltage across the scr will drop near to zero.

Answer / alan jenkins

Peak Electronics make a handy Thyristor and Triac tester
it has 3 leads with croc clips you dont even have to connect it a certain way.. it will analyse and display which colour lead is connected to what terminal eg Red lead = Cathode, Blue lead = anode, Green lead = gate and it will also tell you if the Thyristor/Triac is working correctly.
Usually when triacs/thyristors fail, they fail short circuit

Answer / manikandan

BY CHECKING THE OHMIC VALUE

Size of the 60Hz and 400Hz transformers is a) same b) 60Hz Tr s larger than 400Hz Tr c) 400Hz Tr s larger than 60Hz Tr d) None of the above

5 Answers   Ecil,

what is the id1 & id2 setting in differential protection relay of CSPC?

0 Answers   Wartsila,

why motors are rated in HP?

3 Answers   HCL, ncpl,

IN 6.6KV 3 phase switch gear .i will give 6.6kv to R phase only to earth in during H.v testing (through H.v KIT).what happen remaining phases.how much voltage get remaining phases.why? explain.

1 Answers  

List the materials required for Pipe Earthing.

2 Answers  

How the electric train gets the supply of electricity? What is the return path of the current?

8 Answers   Siemens,

what is the use of choke on tube light fitting

37 Answers   Bhel, Dharma, HSBC, TCS,

how to reduce the initial starting amps which is equal to the running load amps

3 Answers  

What is value of earth resistance required for substation and equipment earthing and what are the reference guidelines

0 Answers   Glenmark,

Slip at maximum torque depends on A rotor resistance and reactance B stator reactance C load current D stator resistance

1 Answers  

If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

1 Answers   Focus,

what is earth-fault?when it occurs? to check where it occurs what type of test should we do?

0 Answers   ONGC,