Page 1 of 2 12 LastLast
Results 1 to 10 of 11
Like Tree20Likes

Thread: Shocks from HEQ5 and Mains

  1. #1
    tezzastroman's Avatar
    tezzastroman is offline Main Sequence
    Points: 1,691, Level: 24
    Level completed: 91%, Points required for next Level: 9
    Overall activity: 2.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Mar 2018
    Location
    Perth
    Posts
    86
    Points
    1,691
    Level
    24
    Thanks
    2
    Thanked 11x 11 Posts

    Exclamation Shocks from HEQ5 and Mains



    Hey all!

    When I use mains power with a standard 240V to 12V adapter, I sometimes get electric shocks when I accidentally touch the HEQ5 tripod legs. It's not the end of the world to me, because they aren't huge and wearing a sweater can fix it, but I'm more worried about the damage it could do the mount itself, I don't want to fry the electronics. I put my telescope on the tiles in the back, I don't know if this is the problem because the tripod legs aren't actually in contact with Earth? And if this is the case, if I leave it on the tiles does it have the potential to damage the equipment?

    Thanks.
    BABOafrica likes this.

  2. #2
    KathyNS's Avatar
    KathyNS is offline Super Moderator
    Points: 172,794, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 36.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience Points400+ Posts AchievementGot three Friends
    Awards:
    Reply Award
    Join Date
    Nov 2010
    Location
    Nova Scotia
    Posts
    25,165
    Points
    172,794
    Level
    100
    Thanks
    6,659
    Thanked 14,981x 9,540 Posts
    Blog Entries
    3

    Default Re: Shocks from HEQ5 and Mains

    Yes, static discharge can damage electronics. You need to get to the bottom of the problem and fix it.

    First, are you plugged into a GFCI outlet? You need to be! If your outlet is not a GFCI, go to your hardware store and buy one (about $20). There are instructions with it for installation - it's typically a DIY job - or you can hire an electrician to do it. The GFCI will shut off power if there is a leak of electricity to ground. It won't solve the leaky voltage, but it will protect you and your equipment.

    If you have a long extension cord and there are electrical storms in the area, the ground value at your scope may be significantly different from your home's electrical ground, causing a shock. You shouldn't be out in those conditions.

    Most likely, there is an electrical fault in your power supply. Try using a jump start battery for a while. If the problem disappears, then the fault is in your power supply. Replace it.

    If the problem persists with a battery pack, then the fault is probably in your mount. You need some detailed troubleshooting, and possibly some boards replaced.

    It could also be normal static electricity. What is the relative humidity? If it is low, then you could be generating static on your clothes (sweaters are notorious for this) and discharging it to the tripod legs. Try discharging your static electricity onto something else, like a metal table before touching the equipment. You will still get the shock, but the electronics will be spared.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    DSO AP:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (pier);
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    .

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  3. #3
    chartram's Avatar
    chartram is online now Silver Supporter
    Points: 33,301, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!50 Posts Achievement!5 Threads Achievement!200+ Posts Achievement!
    Join Date
    Mar 2013
    Location
    Warner Robins, GA
    Posts
    2,928
    Points
    33,301
    Level
    100
    Thanks
    2,206
    Thanked 1,213x 996 Posts

    Default Re: Shocks from HEQ5 and Mains

    Although I do not run my mount with an AC adapter...Plugging into a surge protector (power strip with surge protection circuit, much like a GFCI) can help. Also, if there is some type of voltage converter between the mount and the wall outlet, place it (and the power strip) in a box to keep it dry and away from the elements. Setting up on tiles should not matter- many people use bricks and tiles to keep the mount from settling in to the earth and throwing the PA off. Good luck!

    Mike
    BABOafrica and tezzastroman like this.
    Mike Chartrand
    Celestron 8" Edge HD, WO Star 71, Orion ED80 & ST-80 on a Skywatcher NEQ6 Pro
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    ZWO ASI1600MM, ASI120MC, Lodestar X2 & Orion TOAG
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    Baader LRGB & Astronomik L-3 UV-IR Cut
    Celestron Edge HD .7 Reducer, Hotech Flattener
    My Messier Count: 46
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  4. #4
    KathyNS's Avatar
    KathyNS is offline Super Moderator
    Points: 172,794, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 36.0%
    Achievements:
    200+ Posts Achievement!Ghost Achievement! Averaging 5+ posts a day!First 1000 Experience Points400+ Posts AchievementGot three Friends
    Awards:
    Reply Award
    Join Date
    Nov 2010
    Location
    Nova Scotia
    Posts
    25,165
    Points
    172,794
    Level
    100
    Thanks
    6,659
    Thanked 14,981x 9,540 Posts
    Blog Entries
    3

    Default Re: Shocks from HEQ5 and Mains

    Quote Originally Posted by chartram View Post
    Although I do not run my mount with an AC adapter...Plugging into a surge protector (power strip with surge protection circuit, much like a GFCI) can help. Also, if there is some type of voltage converter between the mount and the wall outlet, place it (and the power strip) in a box to keep it dry and away from the elements. Setting up on tiles should not matter- many people use bricks and tiles to keep the mount from settling in to the earth and throwing the PA off. Good luck!

    Mike
    I agree that a surge protector is a good idea. However, it is nothing like a GFCI. You need both! A surge protector that incorporated a GFCI function, if such a thing exists, would work.

    Electrical surges on the power line are an unlikely source of shocks, whereas ground faults are a likely source.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.


    DSO AP:
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    ; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome;
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    (pier);
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    .

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

  5. #5
    Pauls72's Avatar
    Pauls72 is offline HYPER GIANT
    Points: 19,200, Level: 95
    Level completed: 75%, Points required for next Level: 100
    Overall activity: 35.0%
    Achievements:
    First 1000 Experience Points365 Days+ Registered Achievement!750 Days+ Registered Achievement!1000 Days+ Registered Achievement!3 Years + Achievement
    Join Date
    Jul 2009
    Location
    LaPorte, IN USA
    Posts
    1,971
    Points
    19,200
    Level
    95
    Thanks
    6
    Thanked 660x 511 Posts

    Default Re: Shocks from HEQ5 and Mains

    Well if you receive a shock every time you touch the tripod legs when connected to the AC Mains power, you have one of two problems.
    1) If your AC mains connector is 3 pins, the center ground/earth pin is not connected or making a connection. So your power supply is floating with no reference to ground/earth. It could be the outlet you are plugging it into is not wired correctly or the power supply is at fault. If you have a GFCI outlet, I would expect it to trip with this condition.
    2) If your AC mains connector is 2 pins, then the 230V AC to 12V DC power supply is at fault. There is a voltage leak of some kind. The output should be isolated from the input and it is not.

    Do not try grounding the tripod legs or anything else, unless you know what you are doing.
    I would stop using the AC Mains power supply immediately.

    The floating ground/earth usually will not hurt anything, until something or someone completes the circuit. Tying it to ground will create a short and may cause something to burn up. A person completing the ground circuit will get shocked and could even electrocute themselves under the right conditions.

    Note: You will not feel a voltage shock below about 24V. So you should never feel the 12V.
    Last edited by Pauls72; 12-10-2018 at 11:31 PM.
    BABOafrica and tezzastroman like this.
    Mounts: EQ1, LXD55, Atlas EQ-G (one with Rowan belt mod, EQ6-Rail and one without)

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    C11, 8" Reflector, 102mm MCT, ST80, W.O. FLT98, 6" RC, Lunt LS50THa/B400
    Cameras: Canon XTi, DSI-C, DSI, ST402, QHY8L, QHY183C, QHY163M, ASI120MC-S (Allsky)
    Some of my Pic's http://www.astrobin.com/users/Pauls72/

  6. #6
    tezzastroman's Avatar
    tezzastroman is offline Main Sequence
    Points: 1,691, Level: 24
    Level completed: 91%, Points required for next Level: 9
    Overall activity: 2.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Mar 2018
    Location
    Perth
    Posts
    86
    Points
    1,691
    Level
    24
    Thanks
    2
    Thanked 11x 11 Posts

    Default Re: Shocks from HEQ5 and Mains

    Thanks for the replies, everyone!
    I guess I'll just go back to using my battery pack, as this didn't happen with it. The main problem with the battery pack is that it usually doesn't last very long, but I'll have to live with it for now.
    BABOafrica likes this.

  7. #7
    goldstar's Avatar
    goldstar is offline SUPER GIANT
    Points: 8,553, Level: 64
    Level completed: 35%, Points required for next Level: 197
    Overall activity: 14.0%
    Achievements:
    2 Posts Achievement5 Threads Achievement!20 Posts Achievement!50 Posts Achievement!First 1000 Experience Points
    Join Date
    Feb 2016
    Location
    plattsburgh
    Posts
    1,068
    Points
    8,553
    Level
    64
    Thanks
    2
    Thanked 294x 238 Posts

    Default Re: Shocks from HEQ5 and Mains

    Which battery pack are you using?
    Just about any 12 vdc standard car battery should last over a nights observing, if not several.
    As spoken of by Pauls72 and Kathy, shocks are usually caused by grounding differentials when it comes to household supply.
    Get a good 12 vdc (golf cart, boat, motor cycle) battery thereby eliminating grounding problems and have no cables to trip over (elbow over tea kettle) in the dark.
    Also means that someone in the house won't unplug you when you least expect it! (Hello-what's this cable plugged into the toaster outlet?)
    BABOafrica likes this.

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    CR 6 150 mm f8 refractor . AVX mount. 80mm guide
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    with Nexguide. Canon EOS rebel 3 Ti
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    . Canon Rebel XS DIY modified. I- Optron skytracker. Sky Watcher 8 inch collapsible Dob. 30 mm, 25 mm ,20 mm, 15 mm, 10 mm ,8.8 mm EPS plus plus plus. Cometron 12 x 70 binos plus a couple of 6X42 birders. Sky Watcher PRO ED 80 mm. UHC/LPR, OIII, UV/IR cut filters . Flip mirror. 5 mW green Laser pointer. Telrad donated to Rick18704-Lots of hope. Lousy skies.

  8. #8
    Star Dad's Avatar
    Star Dad is offline Bright Giants
    Points: 5,217, Level: 49
    Level completed: 34%, Points required for next Level: 133
    Overall activity: 8.0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!365 Days+ Registered Achievement!First 1000 Experience Points750 Days+ Registered Achievement!
    Join Date
    Feb 2015
    Location
    Norwich CT
    Posts
    465
    Points
    5,217
    Level
    49
    Thanks
    20
    Thanked 77x 70 Posts

    Default Re: Shocks from HEQ5 and Mains

    Um - did anyone catch "a standard 240V to 12V adapter"? 240 V? really? I do hope you mean 120V. 240 domestically is typically used for ovens, dryers, etc. At 240V I wouldn't wonder that you get zapped - but presuming it's 120V yep, there is something wrong.
    "To be good is not enough when you dream of being great"

    Orion 8" F4.9 1000mm FL, Coronado PST, Celestron 114mm F4.4 FL500mm (2x Barlow removed), Ioptron Mini-Tower, Ioptron iEQ30, Orion Atlas EQ-G, Canon 70D, ZWO ASI120MM, converted TASCO 114mm FL1000mm to Steam Punk, Coma Corrector, Meade 114mm Fl1000 on manual mount.

  9. #9
    jimminCT's Avatar
    jimminCT is offline HYPER GIANT
    Points: 96,630, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    50 Posts Achievement!2 Posts Achievement20 Posts Achievement!First 1000 Experience Points365 Days+ Registered Achievement!
    Join Date
    Apr 2012
    Location
    Connecticut
    Posts
    7,851
    Points
    96,630
    Level
    100
    Thanks
    3,929
    Thanked 2,969x 2,628 Posts

    Default Re: Shocks from HEQ5 and Mains

    Quote Originally Posted by Star Dad View Post
    Um - did anyone catch "a standard 240V to 12V adapter"? 240 V? really? I do hope you mean 120V. 240 domestically is typically used for ovens, dryers, etc. At 240V I wouldn't wonder that you get zapped - but presuming it's 120V yep, there is something wrong.
    120 is only in use in the US... mostly.
    The rest of the world uses 240volts...
    Gabby76 likes this.
    Jim
    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

    OTA's: Kson 1026-C, 4" Carbon Fiber ED Refractor, Celestron C6R, 150mm, Home-built, 6.1", f/2.? APO refractor... (In Progress) 8" Meade LX2 SCT Mounts: ASGT CG-5, CGX Imaging: ZWO ASI 1600MM, Canon 550D (T2i)

    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.
    :
    PixInsight, APT, PHD2, SharpCap, SGP, Stellarium, Registax,
    Stuff: Astro-Tech 0.8x FR/FF, Hotech SCA FF, ZWO 7nm 31mm LRGB-SHO filter set, ZWO 8 position EFWObsy: "Maybe Spaceship" Observatory

  10. #10
    UlteriorModem's Avatar
    UlteriorModem is offline HYPER GIANT
    Points: 84,068, Level: 100
    Level completed: 0%, Points required for next Level: 0
    Overall activity: 0%
    Achievements:
    2 Posts Achievement20 Posts Achievement!5 Threads Achievement!50 Posts Achievement!200+ Posts Achievement!
    Awards:
    Most Threads Award
    Join Date
    Oct 2015
    Location
    Tallahasse Florida
    Posts
    16,756
    Points
    84,068
    Level
    100
    Thanks
    2,316
    Thanked 4,195x 3,546 Posts
    Blog Entries
    4

    Default Re: Shocks from HEQ5 and Mains

    Quote Originally Posted by Star Dad View Post
    Um - did anyone catch "a standard 240V to 12V adapter"? 240 V? really? I do hope you mean 120V. 240 domestically is typically used for ovens, dryers, etc. At 240V I wouldn't wonder that you get zapped - but presuming it's 120V yep, there is something wrong.
    He is in Australia.

    Yea you have some leakage current from somewhere. It is potentially very hazardous. A GFCI protected receptacle or breaker is highly recommend for anything that is outdoors.

    Now you may find that once you install that GFCI device it is constantly tripping, what is called 'nuisance tripping' due to leakage current commonly found in long runs of extension cords or in ground conduit. In that case you may want to consider an extension cord with GFCI built in.

    Might also want to consider replacing that 'standard' power supply with something a little better
    Scopes: Orion 130mm APO Triplet, Orion 8" f4 astrograph, 10" RC Mount: Celestron CGX-L Guiding: Orion 60mm f4 scope, Starlight Loadstar, PHD2 software - Cams: Planetary: ASI120mc, DSO:Atik 383L+, SGPsoftware Processing : Regisax, Deep Sky Stacker, Star Tools, Pixinsight Assistant: One very large cat
    ~ Put your money where your mount is ~


    To view links or images in signatures your post count must be 5 or greater. You currently have 0 signatures.

 

 
Page 1 of 2 12 LastLast

Similar Threads

  1. AAS: solar atmosphere shocks
    By not_Fritz_Argelander in forum Astrophysics Forum
    Replies: 0
    Last Post: 07-25-2018, 09:54 PM
  2. gas shocks in galaxy collision
    By not_Fritz_Argelander in forum Astrophysics Forum
    Replies: 3
    Last Post: 05-01-2017, 10:15 PM
  3. 12v Mains PSU - is this suitable
    By Akwilliams in forum Astro Imaging Forum
    Replies: 9
    Last Post: 12-21-2016, 07:08 PM
  4. mains for celestron CPC
    By Gedan in forum Astronomy Beginners Forum
    Replies: 8
    Last Post: 04-15-2012, 01:00 PM
  5. Replies: 0
    Last Post: 12-29-2007, 08:36 PM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Powered by vBulletin® Version 4.2.0
Powered by vBulletin®
All times are GMT. The time now is 10:42 AM.