In which of the following transformers, is the secondary winding always kept closed?
Current transformer
Therefore, it is absolutely crucial that the secondary winding of a current transformer is always kept closed, either through a connected instrument or a shorting link, whenever current is flowing in the primary circuit. Based on this analysis, the Current Transformer is the type where the secondary winding must always be kept closed to prevent dangerous overvoltage and damage.
Important Questions from Instrument Transformers
A 100 : 5 current transformer is used in conjunction with a 5 A ammeter. If the later reads 3.5 A, find the line current.
Up to a voltage of __________, Potential Transformers (PTs) are usually of dry type.
A potential transformer of 12000/112 V and current transformer of 80/6 A are used to measure voltage and current in a transmission line. If the voltmeter indicates 120 V and current reads 5 A, what is the voltage and current in this line?
- In which of the following transformers, secondary winding is always kept closed?
The table lists two instrument transformers and their features:
Instrument Transformers Features P) Primary is connected in parallel to the grid X) Current Transformer (CT) Q) Open circuited secondary is not desirable Y) Potential Transformer (PT) R) Primary current is the line current S) Secondary burden affects the primary current The correct matching of the two columns is
