Surge protection

[Blurock]

As far as load shedding is concerned, I'm still convinced that my fridge safe together with contactor is the answer.

My power comes on a couple of minutes after everyone else's and I'm sure the spikes caused by switching on are long gone by the time mine comes on.

I have noticed that led lights are prone to failure because of spikes from loadshedding. How do I know this you may ask.? I have had many clients complaining that led lamps were blowing left right and centre. I suggested that when there's loadshedding to switch off the lights and only to switch them on again after the power has been turned back on. End of problem.

The AUS-IoT Monitor (LoRa system) for electricity can be useful to prevent/reduce spikes. We can program the electricity meters in a complex to switch on in phases instead of all the units at the same time. That seems to work well for our customers.

[Dylboy]

Quick one on SPDs... I tried to look at manuals but can't find.

What size conductors do we use ??

So if the SPD does not have an integrated fuse then we need to have Circuit breaker before the SPD, so I then assume if we use a 20A then 2.5mm is fine, but that's not a lot of amps.... So then we do 50A CB and 10mm cable and then I assume same size for the Earth ?

I can not find any info on what size cable and then what size circuit breaker.


Same goes with the N E bridge on the other thread... What size relay/ contactor and what's size CB ?

Sent from my CPH2197 using Tapatalk

[GCE]

Quick one on SPDs... I tried to look at manuals but can't find.

What size conductors do we use ??

So if the SPD does not have an integrated fuse then we need to have Circuit breaker before the SPD, so I then assume if we use a 20A then 2.5mm is fine, but that's not a lot of amps.... So then we do 50A CB and 10mm cable and then I assume same size for the Earth ?

I can not find any info on what size cable and then what size circuit breaker.


Same goes with the N E bridge on the other thread... What size relay/ contactor and what's size CB ?

Sent from my CPH2197 using Tapatalk

Normal rules apply with regards to wire size - Manufacturers instruction will specify
If your CB is SP domestic 80Amps then that should protect most surge arrestors .

Relay size - same story - normal rules apply - If you have a 5Kw inverter the rating would be at least 20Amps with a surge of 7Kw on a 40 Amp CB protection on incomer and 20 Amp or 32 on output

Max PSSC is equal to Max Surge - rate accordingly

[kavesh]

The AUS-IoT Monitor (LoRa system) for electricity can be useful to prevent/reduce spikes. We can program the electricity meters in a complex to switch on in phases instead of all the units at the same time. That seems to work well for our customers.
[ATTACH=CONFIG]8670[/ATTACH]

Can these be installed in a private home? Please explain how this works if you don't mind.

[Blurock]

Can these be installed in a private home? Please explain how this works if you don't mind.

Yes, it can, providing there is LoRa cover in your area. It is ideal for residential and commercial complexes (including high-rise buildings) where one unit or section at a time is switched back on to prevent overload or spikes. We do not sell routers as it comes as part of the package where numbers warrant it. Routers are shared with the Worldwide LoRa Alliance. for a single user who is out of range, a mini LoRa wi-fi router is available. Unfortunately, at a cost.


The AUS-IoT System allows Managing Agents to manage their utilities (water, gas & electricity) on a dashboard and an Android app for the tenants. Meters are read online and alerts for leaks and faults are sent via the system and email.

[BEVIN]

Hi all a few months ago my. Customer calls and says big bang on db .I take voltage reading and find
380 volts between l and n instead of 230v
Neutral gone on trafo.will surge protector have helped
Because the earth leakage. And geyser timer
Didn't work any more?

[GCE]

Hi all a few months ago my. Customer calls and says big bang on db .I take voltage reading and find
380 volts between l and n instead of 230v
Neutral gone on trafo.will surge protector have helped
Because the earth leakage. And geyser timer
Didn't work any more?

I have had installations that have had no damage with a lost star point due to surge arrestors installed .

I also had one that the surge arrestors started smoldering due to the current that it was pulling down to earth

[Isetech]

I dont believe people realise how dangerous it is when the neutral cable/bar is stolen, not only from the voltage but also a fire hazard. It is EXTREMELY dangerous when the neutral is removed.

[ELECT 1]

In a single phase domestic installation we normally fit a CBI 2 pole arrestor. This will trip if it gets a 275v input either on neutral or live incoming.
So in your case i would like to know if this device will trip.
I always try to get the customer to also put external plug in surge arrestors especially on individual items like TV, computer and expensive appliances.

[ELECT 1]

I dont believe people realise how dangerous it is when the neutral cable/bar is stolen, not only from the voltage but also a fire hazard. It is EXTREMELY dangerous when the neutral is removed.

This is why here in the Cape we have to have our earthing spot on, all installations require their own earth spikes/mats and must have the correct readings. The Incoming N is linked to the Earth spike at the entry point in meter box

[shanecoll1982]

Good day

I currently import surge protection units, i have tried contacting the insurance companies to make an offer for these devices and nobody is interested.
It just doesnt make sense to me. They could save millions on surge claims.
I have been testing my units for roughly 8 months now and they work perfectly.

Keep well.