Results 1 to 7 of 7

Thread: Ripple Control Relays

  1. #1
    Email problem
    Join Date
    Jan 2008
    Posts
    6
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Ripple Control Relays

    In 1994, my new Townhouse when I lived in Midrand, had an odd "box" just outside the front door. On enquiring with the complex electrician, he advised me that it was designed for a ripple control relay.

    This was apparently a device that could be used by the Local Municipality, to switch off just the geysers in a suburb, to prevent maximum demand charges.

    It might only be necessary to shed the geysers for 15 or 20 minutes, which would have absolutely no effect on hot water, but have a huge reduction on power demand, given that the average geyser is 3Kw per house.

    Went back to have a look. Box still there with loose wires.

    What ever happened to that simple principle of load shedding, without the need to shut down a suburb completely.

  2. #2
    just me duncan drennan's Avatar
    Join Date
    Jun 2006
    Location
    Cape Town
    Posts
    2,642
    Thanks
    119
    Thanked 94 Times in 77 Posts
    I know that in Gauteng these are widespread and I think that it is mandatory for new installations. There are plenty of people all over the country that have them installed.

    Who else has experience with these?

  3. #3
    Silver Member Graeme's Avatar
    Join Date
    Sep 2006
    Posts
    253
    Thanks
    73
    Thanked 19 Times in 18 Posts
    In Durban, many years ago, the City Council fitted ripple relays to houses in Durban North. Alas, the scheme collapsed because light aircraft wishing to land at Virginia Airport would radio in for landing instructions, the transmission would get picked up by the overhead electricity reticulation network, and the frequency was such that it would set off or on all the ripple relays. We still have ours in our distribution box and it intrigues any electrician we may call from time to time.

  4. #4
    Junior Member OldGoat's Avatar
    Join Date
    Jan 2008
    Location
    Gauteng
    Posts
    22
    Thanks
    1
    Thanked 0 Times in 0 Posts
    Quote Originally Posted by dsd View Post
    I know that in Gauteng these are widespread and I think that it is mandatory for new installations. There are plenty of people all over the country that have them installed.

    Who else has experience with these?
    In the far East (Benoni), we have ripple relays installed. You can hear the contactor switching on and off.
    They switch the geyser off for about an hour at a time and I have never had cold water (although some have complained).

    There is a drive from Eskom to have these relays installed in all houses.

  5. #5
    Email problem
    Join Date
    Jan 2008
    Posts
    6
    Thanks
    0
    Thanked 0 Times in 0 Posts
    I notice in the Star today, that the ripple control relays, are the big saviour for Gauteng.

    Question is why did it take so long.

  6. #6
    New Member
    Join Date
    Mar 2008
    Posts
    6
    Thanks
    0
    Thanked 0 Times in 0 Posts
    Hello

    I am doing a personal bit of research into the matter. My results so far can be found at http://www.anime-za.net/tech/ripple_index.html

  7. #7
    New Member
    Join Date
    Mar 2009
    Posts
    1
    Thanks
    0
    Thanked 0 Times in 0 Posts

    Ripple relay controls

    Hi, i am a South African Electrician living in New Zealand.I have been introduced to Ripple Relays when i started working in NZ and find them useful but also a pain in the you know where.They control our streetlights and hotwater (geysers)These relays get send signals from ripple plants in our substations and activate on these signals.There are areas where the signals dont activate relays and we then have to wire in a photocell or daylight switch.

Similar Threads

  1. What works to motivate your staff?
    By duncan drennan in forum Entrepreneurship and Business Management Forum
    Replies: 56
    Last Post: 22-Jul-11, 08:51 AM
  2. Organic pest control
    By duncan drennan in forum Pest Control Industry Forum
    Replies: 5
    Last Post: 08-Sep-10, 11:49 AM
  3. Top 5 unethical practices in pest control.
    By Dave A in forum Pest Control Industry Forum
    Replies: 1
    Last Post: 15-Jun-09, 05:56 AM
  4. Basic business principles - More control on expenses than income
    By Dave A in forum Entrepreneurship and Business Management Forum
    Replies: 0
    Last Post: 04-Dec-06, 06:16 AM
  5. UN sponsored meeting on control of the internet.
    By Dave A in forum Technology Forum
    Replies: 0
    Last Post: 30-Oct-06, 12:19 PM

Did you like this article? Share it with your favourite social network.

Did you like this article? Share it with your favourite social network.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •