Nhóm 5

What is the purpose of testing on overcurrent relays?

• their ability to withstand various conditions during working operation and electrical systems.

• Check their sensitivity

• Check for protection 

• both B and C are correct

What kind of relay is the test performed on?

• Digital relay

• Solenoid relay

• Electromechanical relays

• It's all true

If the relay istuned to break the circuit after a second, if we have tested it and we believethat it breaks the circuit after a second, what is this test with the relay?

• Check the protection function

• Accuracy test 

• Set test limits

• Check the power supply

What is the ability of digital relay contacts to withstand the current passing through it?

• 10A trong khoảng thời gian 200 giây.

• 5A trong khoảng thời gian 100 giây.

• 15 A trong khoảng thời gian 200 giây.

• 5A trong khoảng thời gian 200 giây.

What is the purpose of testing the user interface in a digital

• Check how easily the person can handle the digital relay

• Check the handling capacity of the relay

• Relay tolerance test

• Check the signal of the relay

Want to know what test does a digital relay store events in an electrical network?

• Check the protection function

• Set test limits

• Ability to withstand the largest current and voltage levels

• Ability to store events in the electrical network

What is the effect of the electromagnetic field that surrounds the relay?

• Affects the readings of the relay or it can cause the relay to malfunction.

• Affects the sensitivity of the relay

• All is true

• It's all wrong

What device supplies power to the control circuit of the digital relay?

• PI provides the circuit with the necessary power supply

• PU provides the circuit with the

• Taken directly from the power supply

• It's all true

Which part will send a signal to the relay if an error current is detected?

• Relay contacts

• Cutter 

• Current transformer

• It's all true

Standard line value that a digital relay can withstand?

• 5A

• 4A

• 10A

• 7A