ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3154)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3310)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13485)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2395)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (424)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (166)
 Instrumentation interview questions  Instrumentation Interview Questions (2409)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (109)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (81)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1207)
Question
what's float charger and boost charger? why it's used?
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
The difference between a float charger and a trickle
charger is that the float has circuitry to prevent
overcharging. It senses when the battery voltage is at the
maximum level and temporarily shuts off the charge (floats
voltage at zero or a very minimal charge until it senses
that the battery output voltage has fallen, then resumes
charging ). You can keep it connected indefinitely.
A trickle charger, on the other hand, will charge no matter
whether the battery is fully charged or not. So it needs to
be connected and disconnected periodically. If left in
place too long it'll eventually boil the electrolyte out of
the cells or damage the plates. Trickle chargers will work
to keep the battery charged if used once a month or so for
a day or 2, but the float chargers can be left connected
indefinitely without potential harm to the battery.
For example, a 24 volt battery pack, comprising 12 2-volt
flooded lead-acid cells, which has been deeply discharged,
would normally be restored by a boost charge of
approximately 2.4 volts per cell for a short time (perhaps
around 72 hours). Once the collective cell voltage reaches
a surface charge of 28.8 volts (2.4 volts x 12 cells), the
charge rate would be switched to the sustained lower float-
charging rate of typically 2.23 volts.
Eventually, with the Boost charge removed, the surface
charge will diminish slightly and the battery-bank voltage
will stabilise at a preset float voltage, in the case of
the example above to approximately 27 volts (2.23 volts x
12).
 
Is This Answer Correct ?    103 Yes 10 No
Sudheer
 
Answer
# 2
Float voltage is the voltage applying to the cells to prevent self discharge. boost voltage is the voltage applying to the cells for charging after a discharge. 
Is This Answer Correct ?    29 Yes 14 No
Anil Vasu
 
 
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
is dc shunt moter oprate on ac? if no why? if yes how? IOCL 8
What is the relation between the Peripheral speed(N) , no.of poles(P) and diameter(D) of a cylindrical rotor alternator ? NTPC 3
wht do u mean by load in circuit.wht dp u mean by inductive load SGS 6
Differene between KVA and KW. Bharti 6
you have an automatic voltage regulator at home for your appliances,if the voltage in your area drops from 220v to 190v,does the output of the automatic voltage regulator drops?or does it retains the 220v output?   4
in alternator permanent magnet generator is also connected on the alternator shaft,then y that PMG voltage is very low as compared to alternator?   1
How to calculate the electrical load for a standard telecom BTS shelter and capacity of DG set required to cater to this load?   2
to improve the existing power factor whether capacitors have to be added in series or parallel.and why   3
what is the operation of Control Module(CM),MONITOR Module(MM), MONITOR Module DUAL (MM2),Signal Module(SM),Isolator Module(IM), please some one reply me.. the operation and application of these in FIRE ALARM SYSTEMS...   1
how we calculate fault current& load factor or fault level&also the leakage current   1
at present how many 765 kv lines are there in india? Emco 5
Why do we twist copper to make cable? MR-Cables 1
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com