Search found 14 matches

by sivagurunathan
Mon Jan 27, 2014 5:36 am
Forum: The Workshop
Topic: under voltage and over current trip
Replies: 15
Views: 27113

Re: under voltage and over current trip

thank u mr. Big pete...
by sivagurunathan
Sun Jan 26, 2014 8:36 pm
Forum: The Workshop
Topic: electric motor recondition.
Replies: 4
Views: 4119

Re: electric motor recondition.

thank u mr. Big pete....
by sivagurunathan
Sun Jan 26, 2014 8:31 pm
Forum: The Workshop
Topic: under voltage and over current trip
Replies: 15
Views: 27113

Re: under voltage and over current trip

thank u mr. Big pete......u r answer helps me in understanding better. one more doubt.... u have mentioned " This involves connected the low voltage, high current windings of a transformer across the breaker, the output current, delivered at only a few Volts, is adjusted until the breaker trips...
by sivagurunathan
Sun Jan 26, 2014 11:09 am
Forum: The Workshop
Topic: air circuit breaker not opening
Replies: 2
Views: 4244

Re: air circuit breaker not opening

thank u mr Big pete
by sivagurunathan
Sat Jan 25, 2014 8:37 am
Forum: Training Room
Topic: quantity of fixesd co2 fire fighting system
Replies: 2
Views: 7567

Re: quantity of fixesd co2 fire fighting system

thank u jolly jack...
by sivagurunathan
Sat Jan 25, 2014 8:26 am
Forum: The Workshop
Topic: air circuit breaker not opening
Replies: 2
Views: 4244

air circuit breaker not opening

this is one of the question i was asked during my oral examinations.... the scenario is we are offloading the generator when the load is 20 kw we are opening the acb from main switch board ( the open/ close handle) but the acb is not opening. my answer is i shall operate the open close button on the...
by sivagurunathan
Sat Jan 25, 2014 8:07 am
Forum: The Workshop
Topic: under voltage and over current trip
Replies: 15
Views: 27113

Re: under voltage and over current trip

some more doubts in primary and secondary current injection.....while injecting the current what should be the position of acb...should it be in test mode or disconnected mode( fully pulled out of main switch board). i read some where in the manual during test mode the control supply is still connec...
by sivagurunathan
Sat Jan 25, 2014 7:47 am
Forum: The Workshop
Topic: electric motor recondition.
Replies: 4
Views: 4119

Re: electric motor recondition.

to mr. Big pete.... thanx for ur answer. iam having some more doubt.... if the weight of the motor is same it indicates the amount of copper used is same as that of the original. but to check if the copper used in each phases are same shall we consider testing of ohmic value of each phase by using m...
by sivagurunathan
Sat Jan 25, 2014 7:34 am
Forum: The Workshop
Topic: under voltage and over current trip
Replies: 15
Views: 27113

Re: under voltage and over current trip

To mr. JK......sir thank u for ur reply. iam giving my class 2 examinations from chennai, india.
by sivagurunathan
Fri Jan 24, 2014 10:25 am
Forum: The Workshop
Topic: under voltage and over current trip
Replies: 15
Views: 27113

under voltage and over current trip

how to check the generator under voltage trip and over current trip onboard?
by sivagurunathan
Fri Jan 24, 2014 9:51 am
Forum: Training Room
Topic: quantity of fixesd co2 fire fighting system
Replies: 2
Views: 7567

quantity of fixesd co2 fire fighting system

for the purpose of calculating co2 required for fixed fire fighting system for enigne room..its mentioned in the FSS code that the largest of the following should be taken. 1) 40 % of the gross volume of the largest machinery space protected, excluding the casing 2) 35% of the gross volume of the la...
by sivagurunathan
Fri Jan 24, 2014 5:22 am
Forum: The Workshop
Topic: electric motor recondition.
Replies: 4
Views: 4119

electric motor recondition.

is there any way to check/verify the amount of copper used in a reconditioned motor is same as that of the original? if so how its tested.
by sivagurunathan
Fri Jan 24, 2014 4:39 am
Forum: The Workshop
Topic: co2 fixed fire fighting system for engine room
Replies: 5
Views: 7172

Re: co2 fixed fire fighting system for engine room

sir this question was asked during my oral examination. since i have not been to drydock iam looking for a practical answer.
by sivagurunathan
Thu Jan 23, 2014 8:45 pm
Forum: The Workshop
Topic: co2 fixed fire fighting system for engine room
Replies: 5
Views: 7172

co2 fixed fire fighting system for engine room

in the fixed co2 fire fighting system the pipeline sections need to pressure tested periodically for 190 bar till the main discharge valve; 80 bar after discharge valve till entry into engine room; 6 bar at lines inside engineroom. these pressure test is usually done at drydocks. my doubt is what is...