contactor or fuse position in circuit rules - WHY??

4 posts / 0 new
Last post
Ampy
Offline
Last seen: 4 years 5 months ago
Joined: Thursday, March 27, 2014 - 00:15
Points: 52
contactor or fuse position in circuit rules - WHY??

Manuals advise contactors and fuses to be put on the B+ end of the circuit not the B-
Why does it make any difference, the whole lot is connected in series so I can't see how in physics it matters
Theres obviously something about electronics I don't understand, grateful if someone can explain?

Ampy
Offline
Last seen: 4 years 5 months ago
Joined: Thursday, March 27, 2014 - 00:15
Points: 52
Re: contactor or fuse position in circuit rules - WHY??

This is the question thread if anyone can help, maybe mod can remove the other one which was double post

Johnny J
Johnny J's picture
Offline
Last seen: 6 months 1 day ago
Joined: Tuesday, July 8, 2008 - 17:02
Points: 377
Re: contactor or fuse position in circuit rules - WHY??

As you say it really doesn't matter, but when it comes to vechicles minus earth (ground) has been the standard for a long time and therefore it's easier to put fuses and such on the plus wires.

MEroller
MEroller's picture
Offline
Last seen: 1 week 6 days ago
Joined: Monday, September 26, 2011 - 09:24
Points: 847
Re: contactor or fuse position in circuit rules - WHY??

Though of course a high-voltage traction battery should have no business at all with ANY pole connected to the vehicle frame/body! Traction batteries should be completely isolated within the vehicle for obvious safety reasons.
But as Johnny J wrote, that does not stop electric vehicle manufacturers from placing fuses and the likes on the positve pole of the traction battery, just out of good old familiarity...

My rides:
2017 Zero S ZF6.5 11kW, erider Thunder 5kW

Log in or register to post comments


Who's online

There are currently 0 users online.

Who's new

  • taylorrachel89
  • Ranch Hands Con...
  • MIAkansascityrehab
  • RanchHandsConst...
  • eidreif

Customize This