Interconnecting Thyristors Questions and Answers

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

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

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

SCRs are connected in parallel to fulfill the ___________ demand

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

To have maximum possible 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.

The measure of reliability of string is given by the factor

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

When an extra SCR is connected in series with a string

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

To have maximum possible string efficiency

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)

When an extra SCR is connected in series with a string

The measure of reliability of string is given by the factor

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)