Exam Question
(a) The current transformer (CT) and potential transformer (PT) or voltage transformer are both measuring devices. List their shipboard application. (6)
(b) Sketch and describe any one type of current transformer. (10)
Class 4 (4th Engineer)
MET
📅 Dec 2025
Reference Answer
### (a) Shipboard Applications of Current and Potential Transformers (6 Marks)
Instrument transformers, which include Current Transformers (CTs) and Potential Transformers (PTs, also known as Voltage Transformers or VTs), are essential for the safe and efficient operation of a ship's electrical power system. Their primary function is to step down high currents and voltages to standardized, safe, and measurable levels for instrumentation, protection, and control.
#### 1. Applications of Current Transformers (CTs)
CTs are connected in series with the main power conductor to step down high currents to a standard secondary rating, typically 5A or 1A.
Instrument transformers, which include Current Transformers (CTs) and Potential Transformers (PTs, also known as Voltage Transformers or VTs), are essential for the safe and efficient operation of a ship's electrical power system. Their primary function is to step down high currents and voltages to standardized, safe, and measurable levels for instrumentation, protection, and control.
#### 1. Applications of Current Transformers (CTs)
CTs are connected in series with the main power conductor to step down high currents to a standard secondary rating, typically 5A or 1A.
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