Eskom issues blackout warning

Not electrically possible afaik.

Analogy wise: You can supply a house with water at half the usual pressure thereby limiting total water delivered, but in the case of elec devices they don't cope with the half pressure part.

Well you could control the disconnection device, set that down the power from 18,400 kW to about 9,000 kW. Which would mean you could still use some appliances while others that have upsurge will kill the power, thus making you more considerate about the times you want to run you fuel pump or heat elements.

Either way, I see the solar panel kits booming this Christmas season.

EDIT: This can be achieved with most prepaid and smart meters. It uses the same conditions to assist in stabilizing smart grids (along with other things).
 
Well you could control the disconnection device, set that down the power from 18,400 kW to about 9,000 kW. Which would mean you could still use some appliances while others that have upsurge will kill the power, thus making you more considerate about the times you want to run you fuel pump or heat elements.

Either way, I see the solar panel kits booming this Christmas season.

EDIT: This can be achieved with most prepaid and smart meters. It uses the same conditions to assist in stabilizing smart grids (along with other things).
oh the irony...

We had infrastructure in place to do exactly that during the apartheid years (Ripple control). Essentially they send a pulse (frequency) down the wires that doesn't affect anything...but the ripple switches pick it up and disable geyser heating during peak.

The tech was in place, simple and effective...but it got lost somewhere between '94 and now. My best guess is that back then ('94) we still had lots of spare capacity so they figured they can safely can this "unnecessary" extra complexity. Arguably poor planning in its own but obviously hindsight is 20/20.

I'm told its still in limited use in some area. My parents place still has a dedicated outside electric box where the ripple switch was installed...hasn't been active in years.

The smart meters are pretty much the same idea...but usually run via cellphone tech (but confusingly still get called "ripple signals").
 
I lived in an older house in S/West a few years ago and the ripple control was still working. The box was installed above the DB board in the kitchen and could be heard clicking on and off during the evening.
Sad to hear that some areas have the infrastructure and aren't taking advantage of it.
 
I lived in an older house in S/West a few years ago and the ripple control was still working. The box was installed above the DB board in the kitchen and could be heard clicking on and off during the evening.
Sad to hear that some areas have the infrastructure and aren't taking advantage of it.


I live in a 30 year old house in Somerset west and the ripple relay is still here but I have never heard it tick since I moved in 3 years ago.

Investing R100k on solar and batteries as a start to getting rid of Eskom. They will not be getting R1500 from me every month for electricity in the next few months. That's R18k in lost revenue from me. I don't know how much they losing to Vodacom in century city and the Black river park office complex that are producing more than what they need.

They are in a catch 22 position as more people are looking to produce their own electricity, the money they a getting in are getting less and they have less money for maintenance and expansion and to subsidise those not paying at all. those that can't afford to go solar are in for huge increases over the next few years as Eskom need to make up the lost revenue from home solar installations.

I probably need another R100k to go completely off grid and would not even want to feed in to the grid. At that point I will completely disconnect Eskom from my DB.
 
Am I the only one that thinks this title is a tad sensational click-bait? Load shedding is very different to a black out. A blackout could take weeks to recover from. Besides which the only real statement made by Eskom is that they don't expect load shedding this week.

A rolling blackout, also referred to as rotational load shedding or feeder rotation, is an intentionally engineered electrical power shutdown where electricity delivery is stopped for non-overlapping periods of time over different parts of the distribution region.

From Wikipedia.
 
The mine up here installed a radio type device that when a signal is received they can turn your geyser off. This was installed during the great blackouts from five years ago.
 
Can any of the fsck wits running this country do anything except get fat and steal.?
 
One of our ward councillors' newsletter about this farce:

Load-Shedding Last Weekend
Despite the City’s assurances that they would be ready for load-shedding after the shambolic 1st weekend, this past weekend’s performance ended up in an even worse shambles. MMC Mfikwe’s reply to my urgent load-shedding question (see last week’s email for more info) is the usual tactic of deny, deflect and play the blame game (see below). What is quite clear is that the current ANC administration is unable to cope with running a City plagued by years of neglect and maladministration.
The weekend load-shedding started off OK. Schedules were released in good time. Residents were prepared. Businesses hired generators. The City’s twitter accounts were primed and ready to go. But then it all started going to pot.
In my ward, load-shedding didn’t occur, despite most of it being scheduled from 10am-2’30pm. We were left wondering what was going to happen? Would we be load-shed later? Had City Power got its schedule wrong?
In other parts of Joburg it went as per schedule. In Blairgowrie, just across the Braamfontein Spruit, power went off promptly at 10am. But it didn’t come back on again. For 40-50 hours! No meaningful information was released by City Power. The Randburg Depot Manager was un-aware of the problem when I contacted him on Sunday morning. The repair team only arrived on Sunday night and power could only be restored in the early hours of Monday morning.
The same situation occurred in Linden, Robindale, Fontainbleu, Ferndale, Riverbend and Malanshof. All the outages were the result of technical faults, load-shedding and overloading. The power could not be restored after their load-shedding period was over.
In Bryanston, the Hobart Sub-Station blew up on Saturday night after their load-shedding ended and power was restored. Admittedly, it was in an Eskom area, but it took City Power several valuable hours while they argued between the entities as to who was responsible for repairing it.
So what was the response by the City to these outages?
There was only ONE operational team for the whole of the Northern Suburbs at the weekend. Thus, each outage had to be dealt with one at a time. This is why it took over 24 hours to get to Blairgowrie as they were busy fixing the other outages first.
This is also why there were no communication as to what the actual problem was and what the likely restoration times were going to be. There was just no way to know what the problems were until the team arrived at each outage. Residents were literally left in the dark with defrosting freezers, dead security systems and, in one case, dying pet fish.
Further compounding the problem is that the only City Power storeroom that is open after hours and at weekends is in Reuven, in south Joburg. So technicians have to schlepp from the repair site to the store and then back again.
City Power added to the confusion on Sunday, by claiming that they would be load-shedding at Stage 2 despite Eskom saying that they were load-shedding at Stage 1. At Stage 2, the City load-sheds two blocks per time frame and places a much heavier burdon on its residents and businesses. It turned out that City Power finally relented and load-shed on Stage 1.
So MMC Mfikwe, I do not accept your excuses and platitudes. Yes, Eskom imposes load-shedding on the City, but it is how the City handles it that is shambolic in the extreme.




City of Joburg says load shedding does not rest with the municipality
The City of Johannesburg has unequivocally distanced itself from the inaccuracies and logistical issues that impacted the public during load shedding on the weekend of 22 and 23 November.
MMC for Environment and Infrastructure Services, Matshidiso Mfikoe, says City Power cannot be held accountable for Eskom's internal issues.
This followed Ward 117 councillor Tim Truluck slamming the city council’s execution to load shedding last weekend, describing its communication plan as ‘shambolic’.
MMC for Environment and Infrastructure Services, Matshidiso Mfikoe, acknowledged the concerns about its communication regarding load shedding but said the municipality was only able to provide the information that was available to it.
According to Truluck, the City Power load shedding web page could not be opened by particular browsers, the website indicated that there was no load shedding for two out of the three days when in fact load shedding was being implemented.
“For most of Sunday it [the website] did not have any load shedding information; residents did not know that the schedule from Saturday would be repeated on Sunday; areas that were under load shedding on Saturday were also under load shedding on Sunday and no communication was issued to ward councillors.”
He added that on municipal communication platforms such as city council’s official twitter account, which did communicate information to the public, there was not sufficient information provided.
However, Mfikoe clarified that, “City Power does not load shed; it is an Eskom-driven process… City Power cannot be held responsible for Eskom’s internal issues.”
“If Eskom does not give us information in the time then how do we give information to our customers? That is one of the things we need to talk to them about and correct with them.”
According to Mfikoe, Eskom typically provided the municipality with load-shedding schedules, which indicated when load shedding would take place.
However, Eskom only announced the forced power outages at about 4pm on 21 November when they were set to implement the outages, despite previously denying that it would be load shedding, Mfikoe said.
Mfikoe said problems arose because Eskom announced it would be load shedding on 23 November when in fact there was no schedule for Sunday and as a result used Saturday’s schedule on the day without communicating this.
“We need to realise that Eskom has its own issues. We need the customers to understand that some of these things are way out of our control. I agree that we need to communicate in time the proper information, but that is only dependent on whether we have proper information from Eskom.”
Mfikoe noted that there were problems accessing City Power’s website, adding that in her personal capacity she could not access it using her cellphone. However, she said these issues had been addressed.
The council would be engaging with Eskom to establish a better communication strategy and more effective ways of executing load shedding, Mfikoe said.
Meanwhile, City Power has since said that it would use its twitter account to update customers about future load shedding programmes.
 
Ripple relays (or their modern counterparts) have been around for decades and have potential to work well. The problem I have seen is that if one or two units fail then the household gets an electrician to fix it, who rather just bypasses the unit. As more units are bypassed, the units that still work are switched off for longer periods and the water gets colder, and eventually whole areas have the units bypassed (in spite of attempts to make this illegal).

The idea of limiting each house has been tried in Grahamstown with a dual-tariff system. Part of your tariff determines the size of the breaker installed to the house. This encourages better self-management - mainly to spread the peak period rather than actually removing base load
 
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