Answer / elangovan t

You can use Type2 coordination table to find out the
contactor rating and OLR rating.
Normally the OLR should be set at the Full load current
rating of the motor. Hence the OLR may be selected such that
the motor flc lie in the mid range of the relay span

Answer / ashish

FOR 30 KW MOTOR CONTACTOR RATING IS AS PER KW MENS 1 KW FOR
1 AMP CONTACTOR FOR SD STARTER FOR 30 KW MOTOR 30 AMP
CONTACTOR AND RELAY SET ON MOTOR FULL LOAD AMP. MULTIPLY BY
(.64).

Answer / aksx

how to find relay range and relay setting of three phase induction motor of 30kw ratting.

Answer / thakur

Full Load Current of Motor-52Ampas per(415.1.732.0.8)

Usually we are using any protective divece/conducter 1.5
time of higher side.then Contactor Carrying Capacity Will
be-80amp and Over Load relay Capaciry wil be-80 Amp and its
over load setting will be-30 amp as per (LI/1.732)

Answer / abhijit

as 30kw is rating flc=52 bmr relay setting will be 50 as it
should be slightly less than flc,contactor should be more
than flc but it depends upon the application coupling

Answer / sanjay

40 hp motor full load current appx 52amps so we have use
2.5 times relay rating and power contactor rating.

how to connect generators in parallel and what are the required equipment to do so?

2 Answers   MSEB,

how is motorized megger operate?

2 Answers  

If you touch at the end welding machine, will you have shock ?

1 Answers  

how can we minimize the off load losses of a distribution transformer which is required to be energized 24x7 ?? capacity of the T/F is 1250 KVA and off load losses are around 2.0 KW.. can we use capacitor bank at the secondary of such a T/F to overcome off load losses? please elaborate briefly...thanks

2 Answers  

How to protect sensitive loads such as Dosing pumps inside a factory from voltage surge/voltage fluctuation.

0 Answers  

why the neutral line is not giving shock to us if we touch it ?

0 Answers   GPREC,

what is a pf factor in generator.

3 Answers   CSEB,

What is meant by rotor?

0 Answers  

why asa method ZPF method is more accurate than ASA method?

0 Answers  

one KVAR takes how much amps, and how to add power capacitors to electrical panels, for example if one of the MCC drawn 800amps means how much KVAR required

1 Answers  

Transfer of electric power from primary to secondary in a transformer takes place A electrically B magnetically C electro-magnetically D conductively

2 Answers  

What is the function of RCBO? What are the different sensitivity ratings & each application?

0 Answers   L&T, Legrand,