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ramydiab
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C.B. Current and Voltage Transformer

04/13/2012 3:52 AM

how can i know each of them. i have 4 wires into the trip unit but i can not have a look on them ( they are hidden). can i differentiate between them by any other way.
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PWSlack
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#1

Re: C.B. current and voltage transformer

04/13/2012 3:54 AM
  • Make?
  • Model?
  • Part number?
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ramydiab
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#2
In reply to #1

Re: C.B. current and voltage transformer

04/13/2012 4:02 AM

it is a merlin gerin C.B. ST 206D trip unit
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ramydiab
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#3
In reply to #2

Re: C.B. current and voltage transformer

04/13/2012 4:29 AM

thanks for that cataloge . but i need a wiring for the trip unit to know where could be the ct is connected.

if u have a site where i can download datasheets from it that would be very kind of u

Thanks
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PWSlack
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#4
In reply to #3

Re: C.B. current and voltage transformer

04/13/2012 4:36 AM

What about using the equipment manufacturer's telephone number, as stated on the equipment datasheet?

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Epke
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#5
In reply to #3

Re: C.B. current and voltage transformer

04/13/2012 4:38 AM

if you don't have a schematic, start measuring!

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ramydiab
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#6
In reply to #5

Re: C.B. current and voltage transformer

04/13/2012 4:44 AM

how can i measure each to differentiate.
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PWSlack
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#7
In reply to #6

Re: C.B. current and voltage transformer

04/13/2012 4:51 AM

So, we're in 1250A switching territory and the principles of operation are unknown? It's time to delegate this task to an appropriately-qualified local Electrician, for the sake of safety.

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ramydiab
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#8
In reply to #3

Re: C.B. current and voltage transformer

04/13/2012 5:15 AM

what could happen 4 the c.b if the current transformer had gone opened.
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PWSlack
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#9
In reply to #8

Re: C.B. current and voltage transformer

04/13/2012 5:40 AM

High voltages on the current transformer wiring. Please stop immediately and involve a qualified electrician in this matter before someone gets hurt/killed.

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ramydiab
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#10
In reply to #9

Re: C.B. current and voltage transformer

04/13/2012 4:13 PM

i understand well what u mean. open secondary of current transformer will lead to C.T. corruption and may explode. but what i need to know how can i cancel the operation of that trip unit of the C.B.?
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PWSlack
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#13
In reply to #10

Re: C.B. current and voltage transformer

04/16/2012 3:26 AM

Why is it there, then?

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Epke
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#11

Re: C.B. Current and Voltage Transformer

04/15/2012 8:57 PM

I agree with PWslack if you are not an certified high voltage engineer, then stay away from the live wires. i was assuming you would measure it in a powered down state and making sure that any lingering charge has been discharged.

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ramydiab
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#12
In reply to #11

Re: C.B. Current and Voltage Transformer

04/15/2012 9:13 PM

hey. it is a low vlotage circuit breaker. not a high voltage circuit breaker. and the client asked from me to cancel the work of that trip unit. and i had done that by removing its mechanism arm.
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