Medium voltage overhead transmission line capacitors discharge 2

[Mr zezo]

How can we discharge capacitors? I saw a lot of videos where they discharge medium voltage power capacitors by connecting it to ground (meaning touch each terminal lonely by grounding stick) is it true? My question here if capacitors are like batteries,so I can't just discharge a battery by connecting each terminal to ground for awhile separately ( meaning not grounding the two terminals at the Same time but individually) , so why capacitors should do that? I think that the best way to discharge capacitors is by shorting it's two terminals together or just using bleeding resistors between it's terminals, as that the discharge path must return to it's source which here is the capacitor.
OR
We can just say that charges which capacitors have are Excessive charges like static charges then we can neutralize it by just connecting it to ground , so which is correct?

 

[RRaghunath]

Capacitors generally come with discharge resistors built-in. This is the reason they also carry an instruction not to touch capacitor terminals for at least 10minutes after power is disconnected.

 

[Mr zezo]

That's not my question, I know that , but if the capacitors were without built in resistors, or I just want to decrease discharging time or just want to make sure that it's completely discharged?so , what's the concept here?

 

[bacon4life]

In order to discharge the capacitor, you are correct that connecting individual bushings to ground while the other bushing floats would not discharge the capacitor. Do you have an example video? It is possible that the capacitors are connected wye grounded, so one bushing would already be grounded.

Owning capacitors without built in resistors seems dangerous. Likewise, attempting to short the capacitor prior to 5-10 minute discharge period seems dangerous.

 

[RRaghunath]

If you don't have built-in discharge arrangement, you may ask the vendor to supply a tool with two leads and a high ohmic value resistor between them.
No doubt, the two leads of the capacitor need to be shorted to discharge the capacitor. This shall be done at measured pace, as recommended by the manufacturer to be sure that the capacitor as well as the person is safe.

 

[Palletjack]

Follow OSHA rules for capacitors..
De-energize the capacitors, wait 5 minutes, then ground them.