lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric Club Car
Electric Club Car Electric DS, and Precedent golf cars



Post New Thread  Reply
Thread Tools Display Modes
Unread 08-21-2014, 10:11 AM   #1
Not Yet Wild
 
Join Date: Aug 2014
Posts: 32
Default Relay for voltage reducer not working

Hello. I have a 1991 36-volt Club Car DS. Just installed a 20-amp voltage reducer. I tried to install the relay to turn off the power to the reducer through the key switch. I wired it per the picture in the "Switch for Voltage Reducer" thread. It wouldn't work. Checking the voltage from the blue wire at the key switch, I had a little over 31 vdc?? Battery pack is fully charged, reading ~ 38.7volts. Is the voltage at the switch (31 vdc) not enough to activate the relay, or do I have a negative-switched key switch? Right now, I have the voltage reducer wired through a 24 vdc marine switch and it seems to be working fine. I would really like to just use the key switch though. Any ideas?
cervus is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Unread 08-21-2014, 10:34 AM   #2
Gone Wild
 
scooterman's Avatar
Club Car
 
Join Date: Jan 2014
Location: Lafayette, Louisiana
Posts: 1,620
Default Re: Relay for voltage reducer not working

I can't find that thread but it looks like you do have Hot key switched. Check to make sure your relay is rated for at least 36v dc and it is rated for 30 amps. You would just need that wire from the switch to one side of the relay coil (+) and the other side of the relay coil to (-) from the battery. This should switch power with the key switch, thus allowing the contacts on the relay to close thus providing power to the converter. Make sure to wire the relay normally open shelf state (no power). The only other issue is the converter itself, usually they have a wire specifically for them to turn on so in reality you may not need a relay as it is built into the converter but it won't hurt to do it the way you're saying. I'd need your converter specific diagram to know that.
scooterman is offline   Reply With Quote
Unread 08-21-2014, 11:10 AM   #3
Not Yet Wild
 
Join Date: Aug 2014
Posts: 32
Default Re: Relay for voltage reducer not working

Quote:
Originally Posted by scooterman View Post
I can't find that thread but it looks like you do have Hot key switched. Check to make sure your relay is rated for at least 36v dc and it is rated for 30 amps. You would just need that wire from the switch to one side of the relay coil (+) and the other side of the relay coil to (-) from the battery. This should switch power with the key switch, thus allowing the contacts on the relay to close thus providing power to the converter. Make sure to wire the relay normally open shelf state (no power). The only other issue is the converter itself, usually they have a wire specifically for them to turn on so in reality you may not need a relay as it is built into the converter but it won't hurt to do it the way you're saying. I'd need your converter specific diagram to know that.
Thanks. I can't find that thread right now either, but here is the picture I used. It's the exact relay.

My converter only has 3 wires, so no switch wire. I'm also concerned about the voltage drop at the key switch. Not sure right now if the cart was in neutral or if the selector was between F/R when I measured, if that even makes a difference on this year cart.

cervus is offline   Reply With Quote
Unread 08-21-2014, 11:15 AM   #4
Gone Wild
 
Sergio's Avatar
Club Car
 
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 3,884
Default Re: Relay for voltage reducer not working

Which relay are you using? The one in that thread, Potter & Brumfield T9AP1D52 does not come in 36v coil. The 48v version has a minimum pickup of 36v.
Also, Your 20amp converter will need less than 10amps on the 36v switching side.
Switching DC is harder on the contacts as there is no 0v crossing to help break the contact connection, so as scooterman suggested, it is a good idea to underrate the capacity when switching DC.
Just FYI, that same relay rated for 30amps at 250VAC, is only rated for 20Amps at 28VDC.

Edit: Well, I see they actually have a part # for the 36v coil, but it is not listed in the datasheet so I am not sure about the specs.

When You say:
Quote:
I have the voltage reducer wired through a 24 vdc marine switch
You mean the 36v from the pack positive goes to that switch and then to the converter?
Sergio is online now   Reply With Quote
Unread 08-21-2014, 11:28 AM   #5
Not Yet Wild
 
Join Date: Aug 2014
Posts: 32
Default Re: Relay for voltage reducer not working

Quote:
Originally Posted by Sergio View Post
Which relay are you using? The one in that thread, Potter & Brumfield T9AP1D52 does not come in 36v coil. The 48v version has a minimum pickup of 36v.
Also, Your 20amp converter will need less than 10amps on the 36v switching side.
Switching DC is harder on the contacts as there is no 0v crossing to help break the contact connection, so as scooterman suggested, it is a good idea to underrate the capacity when switching DC.
Just FYI, that same relay rated for 30amps at 250VAC, is only rated for 20Amps at 28VDC.
This is the description "NEW RELAY, FOR 30AMP 36V BATTERY CHARGERS, POTTER & BRUMFIELD, P/N T9AP1D52-36-01" Mouser specs have it at 36V coil voltage. So not the exact relay, but the same part number in 36V version. I have no idea of the current draw on the converter. Are you saying it won't switch with less or more amps? Thanks.
cervus is offline   Reply With Quote
Unread 08-21-2014, 11:31 AM   #6
Not Yet Wild
 
Join Date: Aug 2014
Posts: 32
Default Re: Relay for voltage reducer not working

Here's the spec sheet on the relay. http://www.mouser.com/ds/2/418/NG_DS...T9A-196289.pdf
cervus is offline   Reply With Quote
Unread 08-21-2014, 11:33 AM   #7
Gone Wild
 
Sergio's Avatar
Club Car
 
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 3,884
Default Re: Relay for voltage reducer not working

That is the same spec sheet I saw, there is no reference to a 36v coil model.....

Anyway, we crossed posts. Are You getting the 36v for the converter directly from the pack positive?
Sergio is online now   Reply With Quote
Unread 08-21-2014, 11:37 AM   #8
Not Yet Wild
 
Join Date: Aug 2014
Posts: 32
Default Re: Relay for voltage reducer not working

Quote:
Originally Posted by Sergio View Post
When You say:

You mean the 36v from the pack positive goes to that switch and then to the converter?
Yes, exactly. Then 12vdc from converter to fuse block for lights, adapter, and future small amplifier for mp3. I'm also running a common ground block from pack for everything.

Edit: I only wired the switch after the coil wouldn't work. I originally had it wired directly from pack.
cervus is offline   Reply With Quote
Unread 08-21-2014, 11:40 AM   #9
Gone Wild
 
Sergio's Avatar
Club Car
 
Join Date: Sep 2012
Location: Charlotte, NC
Posts: 3,884
Default Re: Relay for voltage reducer not working

The weird part is not even the manufacture site lists a 36v model of that relay...
http://www.te.com/catalog/bin/TE.Con...BML=18110&LG=1

Does the part # printed on the relay shows the "-36" for coil voltage?
Sergio is online now   Reply With Quote
Unread 08-21-2014, 11:43 AM   #10
Not Yet Wild
 
Join Date: Aug 2014
Posts: 32
Default Re: Relay for voltage reducer not working

Quote:
Originally Posted by Sergio View Post
The weird part is not even the manufacture site lists a 36v model of that relay...
http://www.te.com/catalog/bin/TE.Con...BML=18110&LG=1

Does the part # printed on the relay shows the "-36" for coil voltage?
I see what you mean. I can't check the part number right now, but here is the link where I got it. Prolly the wrong relay?

http://www.ebay.com/itm/130669420528...84.m1497.l2649
cervus is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Electric Club Car


Thread Tools
Display Modes


Similar Threads
Thread Forum
Voltage regulator/relay Gas EZGO
What is the difference between a Voltage Reducer & Voltage Converter Electric Club Car
Voltage regulator and Relay Golf Carts and Parts
Hooking 48v to 12v Reducer to Keyswitch. Relay? Electric EZGO
Voltage Reducer / Relay Questions Electric Club Car


All times are GMT -5. The time now is 11:59 AM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO ©2011, Crawlability, Inc.