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My latest install - low usage loadshedding solution


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Very nicely done! -  why is there a UPS out and Plugs breaker?

 

EDITED LOL

 

This is a sub DB in the garage, 20m from the Main DB, the "Main switch" is a SP+N isolator on the incoming line from the Main DB. The "Plugs" circuit is connected after the isolator and services a plug socket (on utility power) close by. The "UPS OUT" breaker is the breaker on the output of the inverter just before the "UPS/Inverter E/L". From the "UPS/Inverter E/L" it goes back to the Main DB into another SP+N (isolator) on the Main DB. From that SP+N the new neutral bus-bar, CBs and panel lamp (on the Main DB) are fed.

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This is a sub DB in the garage, 20m from the Main DB, the "Main switch" is a SP+N isolator on the incoming line from the Main DB. The "Plugs" circuit is connected after the isolator and services a plug socket (on utility power) close by. The "UPS OUT" breaker is the breaker on the output of the inverter just before the "UPS/Inverter E/L". From the "UPS/Inverter E/L" it goes back to the Main DB into another SP+N (isolator) on the Main DB. From that SP+N the new neutral bus-bar, CBs and panel lamp (on the Main DB) are fed.

 Got it,

 

So mine as per the other thread didn't need the Main switch because it is next to the main DB.  

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Yes, those are the zener diodes, but I've modified the circuit a bit since those are 8V batteries and I only had 6.8V zeners. I have 7 x 2A schottky diodes in each "balancer" as well. I played around on the workbench and fiddled the circuit until it gave what I needed. Those batteries were at 9.7 V each at the time the photo was taken and that is why the LEDs are dimly lit. I still have to make my own balancers for my 16  :( batteries.  :)

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Good looking, professional install.

 

What lamps are you using on the DB boards and are there any special requirements?

 

Do you make up your own battery leads and if so could you please explain what tools you use and whether you also solder the connections.

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Good looking, professional install.

 

What lamps are you using on the DB boards and are there any special requirements?

 

Do you make up your own battery leads and if so could you please explain what tools you use and whether you also solder the connections.

 

I'm not aware of any special requirements, but if you come across anything, please share.

 

Yes, I've made up my own battery cables. I don't have a crimping tool for those 35mm2 lugs so I've made a punch and die set for the 25mm2 and 35mm2 lugs. I don't solder them, I only punch them and then add some heat-shrink.

 

post-594-0-69996600-1438767190_thumb.jpg

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Was just wondering if you used an LED light for the indicator?

 

Am only aware of the following requirements from SANS 10142

 

7.12.2 Requirements for alternative sources of supply

 

7.12.2.1 Where any form of alternative supply (emergency supply, UPS, etc.), is connected to an electrical installation, a notice to this effect shall be displayed at the main switch of the installation, and where such supply

  • a) supplies power only to certain circuits in a distribution board, a power-on indicator (visible or audible) shall be provided on each such distribution board as well as a notice indicating that the standby power main switch shall also be switched off in an emergency,
  • B) only supplies a part of the electrical installation, the notice shall also be displayed on each distribution board in that part of the installation (see 6.6.1.1(d)).
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