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GScrimES wrote a new post, Circuit breaker:- Can this small thing really carry 6000Amp? 8 years ago

What is the kA rating on a circuit breaker, can it really carry thousands of amps?

The rated current of the circuit breaker is the current it can handle under normal working conditions.

The Rated […]
GScrimES wrote a new post, Circuit breaker for my compressor keeps tripping? 8 years ago

Selecting a circuit breaker for the motor protection: Is this circuit breaker faulty?
I have this compressor with motor pulling 11,5A and I put a 15A CB curve D…why does it still trip?

First of all, pulling […]
GScrimES wrote a new post, Motor starter: Softstarter panel design considerations. 8 years ago

Motor starter: Softstarter panel design considerations.

Generally, we are quick to consider only the dimensional space and then wireways and other components that might be added.

We might even confirm the […]
GScrimES wrote a new post, Motor starting:- Star delta starter will not work here, really? 8 years ago

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…in other words the motor available torque at s […]
GScrimES wrote a new post, Motor starting with a limited supply generator 8 years, 6 months ago

So I get called to confirm if changing from DOL to a softstarter will get a motor started with limited generator power.

Is it unfair to respond and say I don’t know – It all depends on the dynamics of the l […]
GScrimES wrote a new post, Motor starting:-Star delta – It saves money/energy in many ways.(A) 8 years, 6 months ago

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 […]
GScrimES‘s profile was updated 8 years, 6 months ago
GScrimES created the group Members[BP] 8 years, 6 months ago
GScrimES wrote a new post, Motor starting:- Star-Delta saving more money… 8 years, 7 months ago

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.

Thanks to a doc I came across from […]
GScrimES wrote a new post, Earth-leakage: Don’t know about yours, but mine trips… 8 years, 7 months ago

When we have an electrical storm the earth leakage trips and in my assessments it always does when some serious lightning energy is behind it.

It hasn’t always been like that, so it is either something […]
GScrimES wrote a new post, Motor overloads:-I called everyone, no-one knows…What class they are? 8 years, 7 months ago

The thermal overload relays(used for motor protection) – What is the unwritten rule for stockists…class 10 because it is the most common requirement.

If no one asks…it is class 10. If you purchase a […]
GScrimES wrote a new post, Circuit-breaker:-Can it be mounted upside down? 8 years, 7 months ago

Is this serious? No, there is not one code in the world that allows for this.

Mounting it horizontally though is another matter…I suspect in Britain and the USA they do this as a norm (Bear me out here […]
GScrimES wrote a new post, Motor starting:- Softstarter -Do I protect it with circuit breaker or fuses? 8 years, 7 months ago

I got this call regarding softstarter protection: Do I protect it with circuit breakers or fuses?

I say it is your choice – In the manual it is there – Protection can be fuses OR circuit b […]
GScrimES wrote a new post, Motor starting:- Softstarters and power factor correction systems… 8 years, 7 months ago

Lovato says: DISCONNECT During startup/deceleration.
GScrimES wrote a new post, Motor starting:- Softstarter -Why did the starting time stay the same? 8 years, 7 months ago

I was commissioning this Lovato ADX softstarter and it baffled me that the starting time parameters setting simply made no difference?

Only thing that worked in terms of time was “starting period too long “ ala […]
GScrimES wrote a new post, Motor starting:- ONE Softstarter for multiple motors…that’s cool. 8 years, 7 months ago

Why can I not use a softstarter on multiple motors?

Ok, what do you mean, do you want to parallel the motors?

Well the manual says I can use it on multiple motors. He even gives me the page […]
GScrimES wrote a new post, Softstarter: So I can’t use this softstarter in a forward/reverse application? 8 years, 7 months ago

This was my question of the week!

This 3phase softstarter has phase sequence (rotation) sensing check/protection , so what to do when forward / reverse control is required?

The manufacturer says:- Put the […]
GScrimES wrote a new post, Motor starting:- A jerky starting softstarter? 8 years, 7 months ago

Ok, in all fairness personally I have never experienced or even heared about this before but…

If a starting softstater behaves erratic like the motor starts with jerkiness or irregular this could be […]
GScrimES wrote a new post, Motor starting:- Softstarter, can it control the current from ZERO to start the motor? 8 years, 7 months ago

I could not convince this guy any otherwise…The more I explain that a motor cannot start with less current then the FLC the more he claims he bought a softstarter and it worked from 0 AMPS starting the m […]
GScrimES wrote a new post, Circuit-breaker:- You did know has different kA ratings, right? 8 years, 7 months ago

What to make of the two kA ratings one find on MCB (Miniature Circuit Breakers)

Why is there 6 and 10kA for same circuit breaker?(sales)

The famous question that causes much confusion: The BS 60898 […]
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