+ Post New Thread
Results 1 to 6 of 6

5th June 2008, 18:23 #1
 Join Date
 Jun 2006
 Posts
 259
 Helped
 16 / 16
 Points
 3,270
 Level
 13
how to safely discharge a capacitor
How to discharge Large Capacitor Safely ?
:)

5th June 2008, 18:23

5th June 2008, 19:00 #2
 Join Date
 Jan 2008
 Location
 Bochum, Germany
 Posts
 39,735
 Helped
 12126 / 12126
 Points
 230,196
 Level
 100
how to discharge a capacitor safely
With a current limiting resistor of sufficient power capacity.

5th June 2008, 19:00

6th June 2008, 16:36 #3
 Join Date
 Mar 2006
 Location
 Culiacán, Sinaloa, Mexico
 Posts
 479
 Helped
 71 / 71
 Points
 3,875
 Level
 14
how to discharge a capacitor
Adding to the response of FvM at small current in the resistor, the safer or long live to the capacitor.

6th June 2008, 16:36

12th June 2008, 08:02 #4
 Join Date
 Nov 2007
 Posts
 33
 Helped
 1 / 1
 Points
 1,155
 Level
 7
discharge large capacitor
you should have a rsistor parallel to your capacitor and this resistor is usually called the bleeder resistor since the stored energy is being discharge to the resistor this in turn prevents voltage spike during startup.

12th June 2008, 10:31 #5
 Join Date
 Jul 2007
 Posts
 110
 Helped
 0 / 0
 Points
 2,055
 Level
 10
how to discharge a large capacitor
The larger value of resistor, the slower the capacitor discharged and vice versa, but with too small value of resistor, the capacitor discharges so fast causes explosion sound (it doesn't mean something bad with capacitor), the proper value is about 100Ohm

12th June 2008, 10:31

12th June 2008, 19:05 #6
 Join Date
 Dec 2005
 Posts
 36
 Helped
 4 / 4
 Points
 1,497
 Level
 8
safely discharge capacitor
Originally Posted by smiles
The 'safe' thing to do is to calculate one for your situation. The calculation will need to know how fast of discharge is needed (in addition to the capacitors specs). Some can wait an hour, some may need in < 1 second... ??
+ Post New Thread
Please login