Zero Sequence CT

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I

Ingenieur

Senior Member
Location
Earth
trivia
what is the X0?
and what does 'X0' stand for?

op
I have extensive experience in this subject, but ignore me

set up a test on 1 ckt
install the ct on a ckt
program the plc
energize the ckt
see what i you have on the ct
thread a wire thru the ct and connect to a mA i source
ramp up from 0 til it trips
report back

better, contact a leader in the field (GE is now ABB btw)
they are more regular range gfp, not sensitive 100 mA range
try
Bender
Littelfuse
maybe SEL Schwiztzer Engineering Laboratory

all in jest
good luck
0 hard feelings or emotional content
peace
 
GeorgeB

GeorgeB

ElectroHydraulics engineer (retired)
Location
Greenville SC
Occupation
Retired
Besoeker said:
Good. But that would be an unusual system for household power.
:D
Click to expand...

In the USA ... That center tapped, center "ground" 240-1-60 exactly what well over 90% (no supporting reference, I suspect it is over 99% though) of single family residential has at the meter. I'd rather have "line" or "leg" used vs phase in the terminology.

A moderate amount of multi-family residential will be supplied with 2 legs of 208/120.

Substantially no household will have 120-1-60 at the meter.

edit: I see you object to his (you're correct) use of 120 RMS shown as peak ... I think showing 170 would confuse most non-engineers. MOST voltmeters will show that 120.
 
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I

Ingenieur

Senior Member
Location
Earth
Besoeker said:
I should have thought it obvious for an EE.
Difference between RMS and peak in a plot of instantaneous values.
Click to expand...

:thumbsup:
I did notice it
but we usually work in rms
start mixing in the sqrt2's and sqrt3's and all he!! breaks loose!!! lol

but point noted
usually peak is used for instantaneous and sine wave stuff
 
I

Ingenieur

Senior Member
Location
Earth
GeorgeB said:
In the USA ... That center tapped, center "ground" 240-1-60 exactly what well over 90% (no supporting reference, I suspect it is over 99% though) of single family residential has at the meter. I'd rather have "line" or "leg" used vs phase in the terminology.

A moderate amount of multi-family residential will be supplied with 2 legs of 208/120.

Substantially no household will have 120-1-60 at the meter.
Click to expand...

he was joking that it should show peak not rms values

and yes, it has 2 'phases' but not what we call 2 phase (90 deg shift?)
it is derived, not generated
 
roger

roger

Moderator
Staff member
Location
Fl
Occupation
Retired Electrician
ron said:
Guys, stand down.

Do what you want.

There is a lot of good information shared.
Click to expand...
I agree and if the OP wants to start over with a new thread he can but this one is closed.

Roger
 
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