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GScrimES wrote a new post, Circuit breaker- You did know the tripping point changes, right? 8 years, 7 months ago
Would you believe a circuit breaker does not always trip at the same tripping point!
There are various reasons a circuit breaker tripping point deviates…one is temperature.
Well for some more then others – […]
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GScrimES wrote a new post, What everyone must know about circuitbreakers. 8 years, 7 months ago
What everyone must know about circuit-breakers.
When Mr. Edison and Mr. Tesla had their life-changing or more like civilization changing disagreement, circuit breakers did not exist yet, […]
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GScrimES wrote a new post, Fuses:- I never considered this – Using fuses in parallel, Really? 8 years, 7 months ago
Mmmm…So we got this feedback from a fuse supplier suggesting we use 2x400A fuses in parallel to make up 800Amp.
Why is there something that bugs me about this?
And since we are at this…What about using […]
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GScrimES wrote a new post, Circuit-breaker:- Grouping(neighbors) affect one another 8 years, 7 months ago
Did you know just grouping (next to one another) circuit breakers can change the tripping point.
Consideration should be given to the proximity heating effect of the breakers themselves when fully loaded and […] -
GScrimES wrote a new post, Motor starting: Softstarter with thermal overload CALCULATED! 8 years, 7 months ago
I bought this Lovato softstarter, I am commissioning it now and it trips on thermal overload BUT I NEVER INSTALLED A THERMISTER.
Ohh, but Lovato has got this nice feature…
and he rudely interrupts me […] -
GScrimES wrote a new post, Motor starting: Softstarters, are they all equal breeds? 8 years, 8 months ago
Things I will look for when deciding:
What kind of soft start control does it employ: – V/F curve, Voltage only, Current only, Torque control, programmable / intelligent curve control?
Does it have braking […]
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GScrimES wrote a new post, Earth leakages, how sensitive is it really? This 30mA one trips way too early. 8 years, 8 months ago
One day an electrician calls me saying the earth leakages he bought is “over sensitive”
I bought this new digital tester and they all trip around 22mA.
So I say: You do realize that ELD /RCD are subject to […]
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GScrimES wrote a new post, Circuitbreaker:- And we thought resetting is easy? 10 years, 6 months ago
Hi guys, How many people know how to reset a circuit breaker?
Just push it up you say.I guess electricians take a lot for granted when it comes to the general knowledge.
Electrician on the phone: “Hey […]
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GScrimES wrote a new post, Motor starting:- A neat trick to check if generator can take the starting current 10 years, 7 months ago
Why did I not think of this…
In another post I wanted to elaborate on the issue of a motor starting currents killing the generator so will it help to install a soft starter or might a star/delta starter be […]
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GScrimES wrote a new post, This current monitor will not work with a star delta starter… 10 years, 7 months ago
A customer wants to install a current monitor to monitor a motor and is convinced it will not work with a star delta starter.
The startup time is too long, by the time delta pulls in it would have tripped. What […]
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GScrimES wrote a new post, I bought this sensor – it says Namur – and it does not work? 10 years, 7 months ago
I connected but it does not work, what am I doing wrong?
Namur sensors works with specific controllers(amplifiers) only and cannot work with normal loads such as relays. Some PLC(programmable logic controller) […]
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GScrimES wrote a new post, Power factor:- I bet there is no better way to explain it. 10 years, 7 months ago
Nice anecdote to explain PF in electricity.
Equate electricity to a moving car.
The is the car driving on a level road.
Creating an upward slope / gradient equates to creating . The more i […]
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GScrimES wrote a new post, This is when a DIRECT current sensing device(meter) will pop on connection… 10 years, 7 months ago
The relay requires an auxiliary supply to operate the electronics then we are going to connect the current “reading” phase to the current measuring input terminals.
These might or might not be isolated from […]
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GScrimES wrote a new post, Why does this AC solid state relay(SSR) not work? 10 years, 7 months ago
I walk into the workshop and I see someone testing a solid state relay, but he is using the digital meter to confirm if the output is switching.
I walk up and ask what are you doing?
I notice the solid state […]
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GScrimES wrote a new post, This useless proximity sensor does not want to work… 10 years, 7 months ago
This guy is upset…”5 of your sensors I installed and not one of them is working”.
I still try and ask ..”What is the product number”…he says “No, I don’t know and I don’t care, I am coming there now, I am bri […] -
GScrimES wrote a new post, Earthleakage:- This button – what does it do? 10 years, 7 months ago
It is a test button to confirm the operation of the earth leakage…
“Duhuh (or something that sounds like that)” he says…I can see that…it is written on the unit…I ask what does it do. Does it push a […]
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GScrimES wrote a new post, Panel assembly considerations -We normally get too busy with the job and forget the simple things 10 years, 7 months ago
How much thought do we put into the design/layout of an electrical board?
The component layout, cable routes for cabling(comms, IO, high voltage, low voltage), the spacing and positioning according to air flow, […]
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GScrimES wrote a new post, Temperature probes…deciphering who is who. 10 years, 7 months ago
Temperature sensors, could we figure it out by just using a multimeter? Yes offcourse!
The color wires does not always help since they vary across different standards authorities across the world, but the […]
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GScrimES wrote a new post, Earth-leakage without a neutral…what’s up with that? 10 years, 7 months ago
Ahh, but they do exist…3pole earth leakages with no neutral.
Then where will one use such a thing?
But it gets worse:-
Why would ‘Hager have a 3pole earth leakage device BD364, BF364, BDC364, BTC364 – […]
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GScrimES wrote a new post, Design and select components:- Sparky, lets not reinvent the wheel…it is already done for you…remember! 10 years, 7 months ago
When I was researching some online references I noticed how many sites go into having to select the correct components for installations and the obvious just jumped to mind…
In this day and age, though it is […]
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