Page 334 - CITS - Electrician - Trade Practical

ELECTRICIAN - CITS

EXERCISE 114 : Identify the parts of circuit breaker,

check its operation

Objectives
At the end of this exercise you shall be able to
• identify the external parts of air circuit breaker
• identify the internal parts of air circuit breaker
• test the manual tripping of air circuit breaker.

Requirements

Tools/Equipments/Instruments
• Trainees tool kit - 1 No.
• Multimeter/ohm meter - 1 No.
• Air circuit breaker 3 phase 415V
maximum capacity 400 KA with
instruction manual - 1 No.
Procedure

TASK 1 : Identify the external parts and control switches of air circuit breaker
1 Verify the specifications of air circuit breaker with instructions manual. (Fig 1)

Note: Different makes of circuit breakers are available in the market. The air circuit breaker
mentioned here is only a sample model for your guidance. The instructor may arrange the available
model with necessary instructions if necessary.
2 Identify the label numbers of the external part mentioned in Fig 1.

3 Write the corresponding label numbers against the corresponding external parts names only given in Table 1.

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