Help with exam question please!!!!!!

[soar]

State the effect on a three phase induction motor if the phase sequence is incorrect?

 

[Banjo]

State the effect on a three phase induction motor if the phase sequence is incorrect?

The three phase induction motor will run in the wrong direction. Swap any two phases to change this.

 

[soar]

thanks

The three phase induction motor will run in the wrong direction. Swap any two phases to change this.

 

[soar]

State the maximum rating of the BS EN 61009 RCBO which could be installed to provide additional protection? i am saying it is 30mA, but tables 41.5 is saying 30 100 300 and 500 mA. because it is saying additional protection it have me puzzle ,help pls

 

[Banjo]

State the maximum rating of the BS EN 61009 RCBO which could be installed to provide additional protection? i am saying it is 30mA, but tables 41.5 is saying 30 100 300 and 500 mA. because it is saying additional protection it have me puzzle ,help pls

I don't really understand what your asking for here...are you asking for the disconnection times or the maximum earth fault loop impedance?

 

[soar]

question paper 26

A general purpose ring final circuit has been installed in the fitness suite for cleaning and display purposes.

(a) State the maximum rating of the BS EN 61009 RCBO which could be installed to provide additional protection

 

[Banjo]

I would say 30ma

 

[soar]

thanks i would as well

I would say 30ma

 

[cr0ft]

Definitely 30mA.