how to set the overload setting in the thermal overload
relay?? is there any calculation in that??
Answer Posted / elango k
it is based on the charaterstic of olr
100% to flc can be set it is normal
85% to flc can be set it is sharp
because an olr starts to work 115% of flc
for eg. if a motors flc is 100 amps
i am setting 85amps , the olr starts to work
at 100amps it trips the motor
| Is This Answer Correct ? | 13 Yes | 6 No |
Post New Answer View All Answers
What is the reason of polyphase induction motor tripping suddenly on high current during running at 70% laod? Motor IR , winding resistance & inductance balance. Motor no load current is balance and ok as per mgfr. data.
What do you mean by ratio correction factor of instrument transformer?
What is critical disruptive voltage?
If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?
What mean by MLTP
how to calculate the earth fault current
What should be the length of transmission line so that we can see/obtain the full sine wave of voltage??
How to calculate of maximum demand if given 628kw, 785kva, 0.8 p.f.
What type of a DC motor would you use for a lift?
how pt is using
What Is Sampling?
which protection function should measure RMS value of current&DFT value of current?
Why do we mostly prefer to generate and distribute electricity in 3 phase and not in 4 phase or 5 phase?
aternator every parts and its working
What is difference between Sample test and Routine test in safety standard?