Kindly help with this querry!

Discussion in 'Electronics Resources' started by Anirudh Sharma, Apr 18, 2016.

  1. Anirudh Sharma

    Thread Starter New Member

    Mar 11, 2016
    4
    0
    what is the difference between a SPN RCBO and a double pole RCBO...
    It is actually confusing me and the proper answer could not be found anywhere..
    kindly help me...
     
  2. Papabravo

    Expert

    Feb 24, 2006
    10,135
    1,786
    What is an RCBO? What is an SPN?
     
  3. MrChips

    Moderator

    Oct 2, 2009
    12,414
    3,353
    Once you tell us what "SPN RCBO and a double pole RCBO..." mean surely you can come up with a better subject title for your thread.
     
  4. prof328

    New Member

    Apr 15, 2016
    10
    20
    Probably spam as he didn't look very hard at all, in one minute I found the following :

    RCBO (Residual Current Breaker with Overcurrent)

    The following terms are sometimes used to describe the manner in which conductors are connected and disconnected by an RCD:

    • Single-pole / SP / one-pole - the RCD will disconnect the energized wire only.
    • Double-pole / DP / two-pole - the RCD will disconnect both the energized and return wires.
    • 1+N and 1P+N – non-standard terms used in the context of RCBOs, at times used differently by different manufacturers. Typically these terms may signify that the return (neutral) conductor is an isolating pole only, without a protective element (an unprotected but switched neutral), or that the RCBO provides a conducting path and connectors for the return (neutral) conductor but this path remains uninterrupted when a fault occurs (sometimes known as "solid neutral"),[2] or that both conductors are disconnected for some faults (such as RCD detected leakage) but only one conductor is disconnected for other faults (such as overload).[3]
     
  5. Anirudh Sharma

    Thread Starter New Member

    Mar 11, 2016
    4
    0
    Sir,

    With Due Respect,

    Thank you for your reply, it was convincing, but i have yet another doubt,
    if it is a 1P+N then how is the differential current detected,
    if it is just as a DP RCBO then i can co-relate that only the phase trips and
    neutral is just an isolator.

    Kindly clarify,

    Thank you.
     
  6. Anirudh Sharma

    Thread Starter New Member

    Mar 11, 2016
    4
    0
    Sir,

    Can you please explain the working of an electrical and a mechanical interlock,
    both in manual and remote changeover of power for a MCCB or any LV switchgear.

    Genuine interest to know the working principles of electrical engineering

    And i am not a spam sir... :)

    Thank you,
    Anirudh.
     
  7. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,498
    2,364
    With a 1ph (L1 + N) the GFCI detects the difference in current between the L and N if ground current exists from the L to GND.
    Need more info as to the type of equipment you want to interlock?
    Electrical and mech. interlocks take many forms.
    Max.
     
  8. Anirudh Sharma

    Thread Starter New Member

    Mar 11, 2016
    4
    0
    Sir,

    TY for your reply...

    Last friday i was going through a SLD which had this interlock between an EB supply and the DG supply,
    they were interlocked between two 250A MCCB,
    so wanted to know how it would work..
    And Sir if you share any learning manual or link would be great..

    Regards,
    Anirudh
     
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