Interconnecting Thyristors Questions and Answers

SCRs are connected in parallel to fulfill the ___________ demand

The term used to measure the degree of utilization of SCRs connected in series & parallel is

When an extra SCR is connected in series with a string

SCRs are connected in parallel to fulfill the ___________ demand

When an extra SCR is connected in series with a string

The most practical way of obtaining a uniform distribution of series connected SCRs is to

To have maximum possible string efficiency

The measure of reliability of string is given by the factor

Two parallel connect SCRs have same voltage drop (Vt) having rated current = 2I1. SCR-1 carries a current of I1=2.6 A whereas SCR-2 carries a current of I2=1.4 A. Find the string efficiency.

Two parallel connect SCRs have same voltage drop (Vt) having rated current = 2I1. SCR-1 carries a current of I1=2.6 A whereas SCR-2 carries a current of I2=1.4 A. Find the string efficiency.

To have maximum possible string efficiency

3 SCRs are connected in series. The string efficiency is 91%. SCRs 1, 2 & 3 have leakage currents 4 mA, 8 mA & 12 mA. Which SCR will block more voltage?

3 SCRs are connected in series. The string efficiency is 91%. SCRs 1, 2 & 3 have leakage currents 4 mA, 8 mA & 12 mA. Which SCR will block more voltage?

SCRs with a rating of 1000 V & 200 A are available to be used in a string to handle 6 KV & 1 KV. Calculate the number of series & parallel units required in case the de-rating factor is 0.1. (Round off the fraction to the greatest & nearest integer)

The most practical way of obtaining a uniform distribution of series connected SCRs is to

The measure of reliability of string is given by the factor

The term used to measure the degree of utilization of SCRs connected in series & parallel is

SCRs with a rating of 1000 V & 200 A are available to be used in a string to handle 6 KV & 1 KV. Calculate the number of series & parallel units required in case the de-rating factor is 0.1. (Round off the fraction to the greatest & nearest integer)

For a string voltage of 3300 V, let there be six series connected SCRs each of voltage 600V. Then the string efficiency is

For a string voltage of 3300 V, let there be six series connected SCRs each of voltage 600V. Then the string efficiency is