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by GScrim - no comments

Wow, this could be a real bugger to find for the electrician… When the starting torque required is very close to the available rated starting torque of the motor… Aaahhh, YES OFFCOURSE, In star we drop by 0.58 percent and that relates to a third of the available torque and voila there the motor sits […]

by GScrim - one comment

So Mr. E. came back from the auction with a old “new” machine. Placed in the workshop and looks around for an electrical point to connect the machine. Ahh, here is one closest to this electrical board. Oh damn, need a circuit breaker! Excited for the new machine the electrical holesaler gets called.

by GScrim - 3 comments

Is it the product causing the pollution they are talking about or is it that the product is limited to these environments, I don’t know? You check it out:

in Other -
by GScrim - no comments

Shooo, another relay revelation I never expected…operating temperature 52-55DegC just with the coil powered. “Our products are designed to safely work way above the rated values”, the manufacturer says.

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by GScrim - no comments

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by GScrim - no comments

What does a star/delta starter do: Imagine a connected big hosepipe and the tap is opened – the full  pressure will be available(delta), but what if the pipe is stretched such that the diameter decreases and the pipe grows longer…its the same pipe just differently configured.(star). That’s exactly what it is. When a motor starts […]

in Other -
by GScrim - no comments

Hi guys, How many people know how to reset a circuit breaker? Just push it up you say.

by GScrim - no comments

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 adequate? In the mean time I cannot resist sharing this trick: Since it is currently […]

by GScrim - no comments

Been working with star/delta starters for many years and not once did this cross my mind…I guess those were the days when energy conservation was not an issue. ===>>>>>>>>OOPS…TO CONTINUE READING PLEASE LOGIN/REGISTER……Login button on top.

in Other -
by GScrim - no comments

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 lever inside and trip the unit, does it only test the mechanics or the electrics as well…what […]

by GScrim - no comments

When we have an electrical storm the earth leakage trips[1. This is another footnote1.]. In my assessment it does trip when one can feel it is a strike with some energy behind it.

by GScrim - no comments

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 – I can’t use these for motors and the like, they will trip for nothing, or will they? So where […]

by GScrim - no comments

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by GScrim - no comments

Traditionally circuitbreakers were meant to protect the reticulation / plant (wires, contactor, overload, and even the wiring to the motor) but not the motor itself – in other words for SHORT CIRCUITS and NOT OVERLOADS. It is for this reason, depending on who you talk to, it was overrated by a factor of 2 to […]