17-samss-515

Materials System Specification

17-SAMSS-515 14 October 2008 Auxiliary Electrical Systems for Skid-Mounted Equipment Electrical Substations Equipment Standards Committee Members Ishwait, Basel A., Chairman Ghamdi, Mohammed Ahmed, Vice Chairman Nazzawi, Abdullah Omar Fayez, Hamad Abdullah Gopal, Uarutharaja Ojan, Jawad Ali Helfrich, Cory Allan Refai, Jobran Ali Sheef, Jaafar Abdullah Ramadhan, Mohammad Jafar Maghrabi, Ibrahim Mohammad Hartman, Ralph August

Saudi Aramco DeskTop Standards Table of Contents 1 Scope............................................................ 2 2 Conflicts and Deviations............................... 2 3 References.................................................... 2 4 General......................................................... 3 5 Conduit and Cable Installation...................... 4 6 Power and Control Wiring............................. 4 7 Grounding..................................................... 5 8 Motors........................................................... 5 9 Switches and Receptacles........................... 5 Data Schedule - 1............................................... 6

Previous Issue: 17 May 2008 Next Planned Update: 17 May 2013 Revised paragraphs are indicated in the right margin of 6 Primary contact: Ghamdi, Mohammed Ahmed on 966-3-8760290

Copyright©Saudi Aramco 2008. All rights reserved.

Document Responsibility: Electrical Substations Equipment 17-SAMSS-515 Issue Date: 14 October 2008 Auxiliary Electrical Systems Next Planned Update: 17 May 2013 for Skid-Mounted Equipment

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1 Scope

This specification defines the mandatory requirements for auxiliary electrical systems provided on custom-engineered, factory-assembled, and pre-wired, equipment skids. It also applies, if specified, to other types of types of custom engineered, manufactured equipment. Unless specified, this specification does not apply to manufacturer's standard equipment built in conformance with standards recognized by Saudi Aramco.

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.

3.1 Saudi Aramco References

Saudi Aramco Materials System Specifications

16-SAMSS-512 Switchrack – Outdoor

16-SAMSS-518 Low Voltage Panelboards

17-SAMSS-502 Form-Wound Induction Motors 250 HP and above

17-SAMSS-503 Severe Duty Totally Enclosed Squirrel Cage Induction Motors to 250 HP

17-SAMSS-520 Form Wound Brushless Synchronous Motors

34-SAMSS-831 Instrumentation for Packaged Units

Saudi Aramco Inspection Requirements

Form 175-173700 Auxiliary Electrical Systems for Skid-Mounted Equipment

http://standards/docs/SAMSS/PDF/16-SAMSS-512.pdf






http://standards/docs/Inspection_Requirements/PDF/175-173700.pdf


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3.2 Industry Codes and Standards

National Fire Protection Association

NFPA 70 National Electrical Code (NEC)

National Electrical Manufacturers Association

NEMA ICS 6 Enclosures for Industrial Controls and Systems

NEMA MG 1 Motors and Generators

NEMA RN 1 Polyvinyl-Chloride (PVC) Externally Coated Galvanized Rigid Steel Conduit and Intermediate Metal Conduit

NEMA WD 6 Wiring Devices - Dimensional Requirements

NEMA 250 Enclosures for Electrical Equipment (1000 Volts Maximum)

Underwriters Laboratories

UL 698 Industrial Control Equipment for Use in Hazardous (Classified) Locations

UL 894 Switches for Use in Hazardous (Classified) Locations

UL 1010 Receptacle-Plug Combinations for Use in Hazardous (Classified) Locations

UL 1682 Plugs, Receptacles, and Cable Connectors of the Pin and Sleeve Type

4 General

4.1 The electrical installation shall be in accordance with NFPA 70 (NEC).

4.2 Unless otherwise modified by this specification, electrical equipment, electrical wiring systems, and electrical installation shall meet all requirements of Saudi Aramco Materials System Specification 16-SAMSS-512 except as follows:

Exceptions:

1) STRUCTURE section, is not applicable

2) LIGHTING section, is applicable only if lighting is specified for the skid.

4.3 Process instrumentation (including instrumentation wiring material requirements) shall be in accordance with 34-SAMSS-831.




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4.4 Panelboards shall be in accordance with 16-SAMSS-518.

4.5 Inspection requirements shall comply with form 175-173700.

5 Conduit and Cable Installation

5.1 Conduits and cables shall be supported from structural members or dedicated supports only. Process pipe, etc., shall not be used for support.

5.1.1 Structural members used for conduit support shall be coated as specified for the structure.

5.1.2 Channel erector system components (Unistrut or similar) used to support conduits, cable trays, enclosures, lighting fixtures, and other electrical equipment shall be made of steel, either hot dip galvanized (preferably), or zinc electroplated as supplied by the manufacturer. If the skid has been designated for applications in a "severe corrosive environment" in the data schedule, channel erector system components shall also be factory coated with PVC per NEMA RN 1 or be of stainless steel.

5.2 Conduits and cables shall not be installed within 150 mm of process piping which operates at temperatures in excess of 100°C, where subject to physical damage, within 75 mm of ladder rungs, or in areas subjecting personnel to tripping hazards. Conduit runs shall be installed parallel to or at right angles to equipment and/or skid structure lines.

5.3 Each continuous conduit run with a length in excess of 3 m shall be provided with a Type 300 Series stainless steel combination drain/breather fitting at the lowest point of the run.

5.4 Sealing for explosion containment shall be provided only at enclosures and devices which are required by the NEC to be sealed.

5.5 Armored cables shall be continuously supported by cable tray or structural steel except for lengths, not exceeding 2 m, at terminations to electrical equipment.

5.6 All open conduits shall be capped.

5.7 Conduit sealing fittings shall not be used.

6 Power and Control Wiring

6.1 Conductors shall be continuous, without splices, between termination points.

6.2 Power, lighting, and 120 V ac or dc control wiring shall be run in conduit or cable systems separate from instrumentation and communication systems.


http://standards/docs/Inspection_Requirements/PDF/175-173700.pdf


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6.3 Field wiring connections to skid wiring systems shall be at skid-mounted terminal boxes containing terminal blocks, except for equipment designated for direct connection. (e.g., Where a motor branch circuit is brought directly from a controller external to the skid to a motor mounted on the skid.)

7 Grounding

Provision for grounding the skid structure shall be made at diagonally opposite corners per the switchrack structure grounding requirements of 16-SAMSS-512.

8 Motors

8.1 Fractional horsepower motors, except for motors operating motor-operated valves, shall be NEMA Frame fractional horsepower totally-enclosed motors meeting the requirements of NEMA MG 1 with minimum NEMA Class B insulation system and suitable for operation in a 50°C ambient temperature.

8.2 Motors 0.746 kW and larger shall be in accordance with Saudi Aramco Materials System Specifications 17-SAMSS-502, 17-SAMSS-503, or 17-SAMSS-520 as applicable.

9 Switches and Receptacles

9.1 General-use snap switches shall comply with UL 894. Control switches shall comply with UL 698. Switch enclosures shall be cast or malleable iron per NEMA ICS 6 and Type 3/7 minimum in accordance with NEMA 250.

9.2 Receptacles, when required, shall be in accordance with NEMA WD 6, UL 1010, or UL 1682. Unless otherwise specified by the Saudi Aramco buyer or company representative or required because of the electrical area classification, 120 VAC receptacles shall be NEMA type 5-20R.

9.3 Receptacles shall meet the requirements of NEC Article 410 for wet locations and receptacles for 120 V AC shall be protected with a ground fault circuit interrupter (GFCI) circuit breaker.

Revision Summary 17 May 2008 Revised the "Next Planned Update". Reaffirmed the contents of the document and

reissued with no other changes. 14 October 2008 Editorial revision to replace Electrical Substations Equipment Standards Committee

Chairman and Vice Chairman.






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Data Schedule - 1

For 17-SAMSS-515 : Auxiliary Electrical Systems for Skid-Mounted Equipment

(Information to be Supplied by Buyer)

Quotation Request/ Purchase Order No.______________

B.I./J.O. No._________, Line Item No.______________

Service Information:

As Indicated on the Attached Reference Documents: ___________________ or as Follows:

Indoor ____, Outdoor_____

Area Classification: Unclassified _____

Classified _____: Class _____ Division/Zone _____ Group(s) _____

Commentary Note:

Vendor to indicate in quotation if skid mounted equipment will affect classification.

Severe Corrosive Environment: Yes ( ), No ( )

System Frequency: 60 Hz Nominal System Supply Voltage: _______

120VAC Utility Receptacle(s) Required: Yes ( ), No ( )

Arabic Warning Nameplates Supplied by: Manufacturer ( ), Buyer ( )