HVE CBM

Equipment with Polarization Index (PI) of less than 2.0 is still fit to use.

• true

• false

SFRA (Sweep Frequency Response Analysis)​ is used to test:

• Electrical condition of transformer windings

• Inductance level of the transformer

• Physical condiiton of transformer windings

Direct contact with equipment is needed for Thermal Imaging Test

• true

• false

The reading for Polarization Index (PI) are taken at :

• A. 5 minutes & 10 minutes

• B. 1 minute & 10 minutes

• C. 3 minute & 6 minutes

• D. 1 minute & 11 minutes

At what Degree of Polymerization does the paper insulation need to be replaced.

• 200

• 300

• 100

• 400

What is released during breaking of paper insulation?

• Glucose

• Cellulose

• Furan

How many form of Furan molecule that can be formed from the breaking of cellulose?

• 1

• 4

• 6

• 5

These elements are present in a pure insulator connection EXCEPT

• Total current, It

• Resistive current, Ir

• Capacitive current, Ic

The higher the magnitude of the loss angle δ, the higher the quality of the insulation

• true

• false

What is the maximum current leakage in a Class 1 handheld device Equipment?

• 0.75 mA

• 3.5 mA

• 0.25 mA