Overcurrent and earth fault protection

Identify the condition shown in the picture

• overload

• short circuit

• earth fault

• wrong polarity

Which of the following is NOT an overcurrent ?

• earth leakgea

• earth fault

• short circuit

• overload

When the phase conductor in a circuit touches the neutral conductor , it is known as

• short circuit

• grounded

• earth fault

• bonding

Identify the type of protective device shown.

• Rewirable fuse

• High breaking capacity fuse

• cartridge fuse

• high rupturing capacity fuse

Fuse or circuit breaker shall be installed in the

• phase conductor

• neutral

• cpc

• main bonding conductor

The term MCB commonly used refers to

• miniature circuit breaker

• manual circuit breaker

• metallic circuit breaker

• moulded circuit breaker

MCCB or moulded case circuit breaker as compared to MCB are generally of higher

• capacity

• voltage

• frequency

• temperature class

identify the fuse shown

• cartridge

• rewirable

• HBC

• HRC

Which of the following will operate in the event of earth leakage?

• Fuse

• MCB

• RCCB

• MCCB

The bimetallic strip in MCB cause it to trip when there is

• overload

• earth leakage

• short circuit

• earth fault