Motor and Transformer Winding

Which material is used to insulate the winding lead connection and terminals?

• Fiber glass tape

• Millinex paper

• Empire sleeve

• Micanite paper

Which material is used for wedges in motor winding process?

• Hemp thread

• Fiber glass sleeve

• Bamboo

• Tesylene thread

Which type of winding are use in rotor?

• Armature

• stator

• Field coil

• Rotor

The figure shown the insulation scheme of the slot conductor in armature core, which protection of insulation is called 'packing streep'?

• A

• B

• C

• D

Which part is paper insulation ?

• A

• B

• C

• D

The insulating materials used for winding are classified according to their ability to withstand a particular range of temperature.

What is the maximum safe temperature of class "E"insulation?

• 90 deg

• 130 deg

• 120 deg

• 105 deg

Which one of following insulating materials belong to class "E "insulation ?

• Cotton

• Silicon elastomer

• Leatheroid paper

• Glass fiber

Which insulating materials belong to class "B "insulation.

• Cotton

• Silicon elastomer

• Leatheriod paper

• Mica

The permissible temperature rise of electrical machine is decidedby the type of

• Material used for winding wire

• Wedge used for winding

• Insulating varnish used

• Insulating materials used for winding

The electrical degree of 6 pole AC motor is .

• 1080

• 720

• 540

• 360