Interconnecting Thyristors Questions and Answers

The measure of reliability of string is given by the factor

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

When an extra SCR is connected in series with a string

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

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.

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

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

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

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?

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

The measure of reliability of string is given by the factor

SCRs are connected in parallel to fulfill the ___________ demand

When an extra SCR is connected in series with a string

SCRs are connected in parallel to fulfill the ___________ demand

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)

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.

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?

To have maximum possible string efficiency

To have maximum possible string efficiency