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    Materials System Specification

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    Florante Nobleza

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    © All Rights Reserved
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    Materials System Specification

    Uploaded by

    Florante Nobleza
    130 views5 pages

    Original Title

    16-SAMSS-515

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    © © All Rights Reserved

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    Copyright:

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    130 views5 pages

    Materials System Specification

    Uploaded by

    Florante Nobleza

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    © All Rights Reserved
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    of 5

    Materials System Specification

    16-SAMSS-515 29 June 2005


    Design and Fabrication of
    High Resistance Grounding Systems
    Electrical Substations Equipment Standards Committee Members
    Ghamdi, Mohammed A., Chairman
    Carlson, Ron W., Vice Chairman
    Fayez, Hamad A.
    Gopal, Uarutharaja
    Hartman, Ralph A.
    Helfrich, Cory H.
    Lowe, John L.
    Maghrabi, Ibrahim M.
    Nazzawi, Abdullah O.
    Ojan, Jawad A.
    Ramadhan, Mohammed J.
    Refaee, Jubran A.
    Rewatkar, Jayesh K.
    Stansbury, M.C. "Chip" (ABQ PLANTS)

    Saudi Aramco DeskTop Standards


    Table of Contents

    1 Scope............................................................. 2
    2 Conflicts and Deviations................................ 2
    3 References.................................................... 2
    4 Qualification................................................... 3
    5 Modifications to Industry Standard................ 3

    Data Schedule...................................................... 5

    Previous Issue: 30 September 2003 Next Planned Update: 1 October 2008


    Page 1 of 5
    Primary contact: Mohammad A. Ghamdi on 874-7954
    Document Responsibility: Electrical Substations Equipment 16-SAMSS-515
    Issue Date: 29 June 2005 Design and Fabrication of
    Next Planned Update: 1 October 2008 High Resistance Grounding Systems

    1 Scope

    This specification defines the mandatory requirements for design, fabrication, and
    testing of a high resistance grounding system for indoor installation in non-hazardous
    locations.

    This specification can be used as follows:


    a) With Process Industry Practices ELSGS01 for specifying high resistance
    grounding systems for use on new or existing wye-connected 480 V power
    systems.
    b) With Process Industries Practices ELSGS02 for specifying high resistance
    grounding systems for use on existing delta connected 480 V power systems.

    Process Industry Practices ELSGS01 is a part of this specification when the data sheet
    indicates purchase of a high resistance grounding system for a wye-connected 480 V
    power system. Process Industry Practices ELSGS02 is part of this specification when
    the data sheet indicated purchase of a high resistance grounding system for a delta-
    connected 480 V power system.

    If specified, the high resistance grounding system may be integrated into a Motor
    Control Center or low voltage switchgear lineup. In this case this specification shall
    accompany the low voltage controlgear specification or the low voltage switchgear
    specification.

    2 Conflicts and Deviations

    2.1 If there are any conflicts between this Specification and associated purchasing,
    project or engineering documents, this specification shall take precedence.

    2.2 Direct all requests to deviate from this Specification in writing to the Company
    or Buyer Representative, who shall follow internal company waiver procedure.

    2.3 The designation "Commentary" is used to label a sub-paragraph that contains


    comments that are explanatory or advisory. These comments are not mandatory,
    except to the extent that they explain mandatory requirements contained in this
    SAMSS.

    3 References

    The following is a summary of all the documents which have been mentioned within
    this Specification. The specific part(s) of these documents which are applicable have
    been identified throughout this Specification.

    Industry Codes and Standards

    Page 2 of 5
    Document Responsibility: Electrical Substations Equipment 16-SAMSS-515
    Issue Date: 29 June 2005 Design and Fabrication of
    Next Planned Update: 1 October 2008 High Resistance Grounding Systems

    Process Industry Practices


    ELSG01 Design and Fabrication of High-Resistance
    Grounding System, (600 Volts and below)
    ELSG02 Design and Fabrication of High-Resistance
    Grounding System, (delta system, 600 Volts
    and below)

    4 Qualification

    4.1 At least 10 similar high resistance grounding units designed for operation at
    600 V or less must have been manufactured at the proposed location of
    manufacture and these units must have satisfactorily operated for at least
    2 years.

    4.2 Evidence that the requirement in 4.1 has been met shall be furnished with the
    vendor's proposal.

    5 Modifications to Industry Standard

    The following paragraph numbers refer to PIP ELSGS01 or PIP ELSGS02which is a


    part of this specification. The text in each paragraph is an addition, modification,
    exception, or deletion to the requirements of ELSGS01 or ELSGS02. Except as noted
    the modifications apply to both PIP specifications.

    3.2 (Deletion) Delete entire paragraph.

    3.3 (Addition) Saudi Aramco data sheet will be used rather than the PIP data
    sheet.

    4.1.5 (Deletion applying to ELSG02 only): Delete phrase "of 5 amperes" in first
    sentence.

    4.2.1(b) (Exception): For indoor applications in an air-conditioned environment, the


    system shall be designed for a maximum ambient of 40ºC and a minimum
    ambient of 0ºC. For indoor applications in an non-air-conditioned
    environment, the system shall be designed for a maximum ambient or 50ºC
    and a minimum ambient of 0ºC.

    4.2.2 (Addition): The grounding system shall be designed for and located in an
    indoor, non-classified location. Operation outdoors or in a classified
    (hazardous) location is not permitted.

    4.4.1(g) (Exception applying to ELSGS01): A white light shall be used to indicate


    control power available.

    Page 3 of 5
    Document Responsibility: Electrical Substations Equipment 16-SAMSS-515
    Issue Date: 29 June 2005 Design and Fabrication of
    Next Planned Update: 1 October 2008 High Resistance Grounding Systems

    4.4.1(h) (Exception applying to ELSGS02): A white light shall be used to indicate


    control power available.

    4.4.1(p) (Deletion applying to ELSGS02 only): Delete entire subparagraph.

    4.4.1(l) (Addition to ELSGS01): The pulse current shall be 5 to 7 amperes greater


    than the ground fault current.

    4.4.1(m) (Addition to ELSGS02): The pulse current shall be 5 to 7 amperes greater


    than the ground fault current.

    4.6.2 (Deletion to ELSGS02 only): Delete Phrase "and 7 amperes for fault
    detection".

    4.8.1.4 (Addition): All additional relay contacts for external buyer connection shall
    be wired to a dedicated terminal block(s) that are separate from terminal
    block(s) provided for power and transformer neutral connections.

    4.8.1.8 (Revision to ELSG01 only): Revise to read: "Wiring to the resistors shall
    be rated for high temperature or shall be protected with high-temperature,
    heat-shrink tape within 6 inches of the resistor terminals."

    4.8.2.6 (Addition to ELSG01 only): A separate suitable marked terminal strip shall
    be provided for all resistor taps and to allow changing of taps from the front.
    An engraved nameplate indicating various tap connections shall be provided
    near this terminal strip.

    4.8.3.1 (Addition): Wire labels shall be embossed, slip-on or heat-shrinkable type.


    Wrap-around, rigid snap-on, or adhesive type markers are not permitted.

    Revision Summary
    30 September 2003 Revised the "Next Planned Update". Reaffirmed the contents of the document, and
    reissued with no other changes.
    29 June 2005 Minor revision.

    Page 4 of 5
    Document Responsibility: Electrical Substations Equipment 16-SAMSS-515
    Issue Date: 29 June 2005 Design and Fabrication of
    Next Planned Update: 1 October 2008 High Resistance Grounding Systems

    Data Schedule
    16-SAMSS-515

    Type System [ ] Wye (attach ELSGS01) [ ] Delta (attach ELSGS02)


    Enclosure:
    Site Conditions:
    … Mfr.'s Standard z Type:________
    Altitude (if above 1000m)__________
    … Indoor NEMA 1 … Indoor NEMA 12
    Indoor Conditions:
    … Integrated in switchgear or MCC
    … Air-conditioned
    Space Heaters:
    … Non-air-conditioned
    … Not Required … Required
    120 VAC Control Power/Heater Source:
    … Thermostat Not Required
    … Internal source by Vendor
    z Space Heater Load ____Watts
    or
    Portable Detectors:
    … External source by Buyer
    … Not Required
    z VA Required ____________
    … Required Number Required: _______

    z Data to be provided by Vendor with proposal.

    Commentary Note:

    (Note for Saudi Aramco requisition initiator or Saudi Aramco contractor specifying high
    resistance grounding system.) Prior to specifying a high resistance grounding system, it
    must be reviewed and approved in accordance with SAES-P-111, "Grounding."

    Page 5 of 5

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