Reverse polarity protection for 3-phase, 3-diode bridge?

C

cupoftea

Advanced Member level 5
Joined
Jun 13, 2021
Messages
2,953
Helped
59
Reputation
118
Reaction score
135
Trophy points
63
Activity points
15,670
Hi,
Whats the favoured way for rev pol protection on a 3 phase , 3 diode bridge? Ayk, if a phase goes into neutral connector by mistake, and the neutral to one of the phase connectors, the voltage goes high and the magic smoke comes.
LTspice and PNG attached
 

Attachments

  • 3 diode bridge.png
    32.9 KB · Views: 8
  • 3 diode bridge.zip
    820 bytes · Views: 3

Sort by date Sort by votes
Hi,

A little piece of documentation .. and a worker who can read.
Best if the "documentation" is printed on or close to the connectors.

I don´t feel responsible for the mistakes of others (anymore). It´s just my cost and the benefit for others.

Klaus
 
Upvote 0 Downvote
Hi,
The attached circuit is the "standard" and well known way to protect
against accidental misconnection of the 3 phase half wave diode bridge.
(ie a phase and neutral getting accidentally swapped)
But as can be seen, its a huge amount of componentry.
Any lower_component_count ways?

The attached just has an input relay...it doesnt turn on if any phase and neutral are misconnected.
 

Attachments

  • 3 phase diode bridge protection.png
    52.3 KB · Views: 3
  • 3 diode bridge protection.zip
    5.5 KB · Views: 0
Last edited:

Upvote 0 Downvote
You must log in or register to reply here.

Similar threads

Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…