Exam Question
With reference to the condition monitoring of electrical machinery:
(a) State TWO important parameters that may be recorded; (8)
(b) Explain how the parameters are measured and what defects may be revealed. (8)
Class 4 (4th Engineer)
MET
📅 Feb 2026
Reference Answer
### (a) TWO Important Parameters for Condition Monitoring of Electrical Machinery
Two primary and critical parameters for the condition monitoring of electrical machinery are **Temperature** and **Vibration**. These parameters provide non-invasive, real-time indicators of the machine's internal health, allowing for predictive maintenance and prevention of catastrophic failures.
1. **Temperature:** The operational temperature of an electrical machine is a fundamental indicator of its efficiency and health. Heat is an unavoidable byproduct of energy conversion, generated primarily by:
* **I²R Losses (Copper Losses):** Resistance in the stator and rotor windings causes heat generation proportional to the square of the current.
Two primary and critical parameters for the condition monitoring of electrical machinery are **Temperature** and **Vibration**. These parameters provide non-invasive, real-time indicators of the machine's internal health, allowing for predictive maintenance and prevention of catastrophic failures.
1. **Temperature:** The operational temperature of an electrical machine is a fundamental indicator of its efficiency and health. Heat is an unavoidable byproduct of energy conversion, generated primarily by:
* **I²R Losses (Copper Losses):** Resistance in the stator and rotor windings causes heat generation proportional to the square of the current.
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