Specifications_Amendment_0002_Camp_Buehring.pdf

Underground Electric Lines, Camp Buehring, Kuwait 474411

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 11 16

PACKAGE SUBSTATION Revised by Amendment 0002

02/10

PART 1 GENERAL

1.1 REFERENCES

1.2 RELATED REQUIREMENTS

1.3 DEFINITIONS

1.4 SUBMITTALS

1.4.1 Coordinated Submittal Reviews

1.5 QUALITY ASSURANCE

1.5.1 Drawing Requirements

1.5.1.1 Unit Substation Drawings

1.5.1.2 Transformer Drawings

1.5.2 Paint Coating System

1.5.3 Transformer Losses

1.5.4 Substation Product Data

1.5.5 Test Reports

1.5.6 Regulatory Requirements

1.5.7 Standard Products

1.5.7.1 Material and Equipment Manufacturing Date

1.6 MAINTENANCE

1.6.1 Assembled Operation and Maintenance Manuals

1.6.2 Operation and Maintenance Data

1.7 WARRANTY

PART 2 PRODUCTS

2.1 PRODUCT COORDINATION

2.2 PACKAGE SUBSTATION

2.2.1 General

2.2.2 Enclosure

2.2.3 Interior Compartments

2.2.4 Kiosk Doors

2.2.5 Grounding

2.2.6 Ring Main Unit (RMU)

2.2.6.1 Ring Main Switches

2.2.7 Low Voltage Switchgear

2.2.7.1 General

2.2.7.2 Metering

2.2.7.3 Additional Salient Features

2.3 Incoming Cable Terminations

2.3.1 Surge Arresters

2.3.2 Load Interrupter Switch

2.3.3 Primary Protective Device Connection

2.4 Transformer (Liquid-Filled) Section

2.4.1 Transformer Ratings

2.4.2 Transformer Accessories

2.4.3 Insulating Liquid

SECTION 26 11 16 Page 1 W912ER18R0024 Amendment 0002

2.5 Instruments

2.5.1 Ac Ammeters

2.5.2 Ac Voltmeters

2.5.3 Instrument Control Switches

2.6 Insulated Barriers

2.7 Terminal Boards

2.8 Wire Marking

2.9 Grounding and Bonding

2.10 Padlocks

2.11 Cast-in-Place Concrete

2.12 MANUFACTURER'S NAMEPLATES

2.13 FIELD FABRICATED NAMEPLATES

2.14 WARNING SIGNS

2.15 SOURCE QUALITY CONTROL

2.15.1 Equipment Test Schedule

2.15.2 Load Interrupter Switch Production Tests

2.15.3 Transformer Design Tests (Liquid-Filled)

2.15.4 Transformer Routine and Other Tests (Liquid-Filled)

PART 3 EXECUTION

3.1 INSTALLATION

3.2 GROUNDING

3.2.1 Grounding Electrodes

3.2.2 Substation Grounding

3.2.3 Connections

3.2.4 Grounding and Bonding Equipment

3.3 INSTALLATION OF EQUIPMENT AND ASSEMBLIES

3.3.1 Interrupter Switchgear

3.3.2 Field Applied Painting

3.3.3 Field Fabricated Nameplate Mounting

3.3.4 Warning Sign Mounting

3.3.5 Galvanizing Repair

3.4 FOUNDATION FOR EQUIPMENT AND ASSEMBLIES

3.4.1 Exterior Location

3.4.2 Cast-in-Place Concrete

3.5 Padlocks

3.6 FIELD QUALITY CONTROL

3.6.1 Performance of Acceptance Checks and Tests

3.6.1.1 Interrupter Switchgear (Air Switches)

3.6.1.2 Transformers (Liquid-Filled)

3.6.1.3 Current Transformers

3.6.1.4 Metering and Instrumentation

3.6.1.5 Grounding System

3.6.2 Pre-Energization Services

3.6.3 Follow-Up Verification

-- End of Section Table of Contents --

SECTION 26 11 16 Page 2

SECTION 26 11 16

PACKAGE SUBSTATION

Revised by Amendment 0002

02/10

PART 1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by the basic designation only.

The Contractor is responsible to comply with the requirements of the Kuwaiti codes and standards as applicable and in effect at the time construction permits are requested.

If those requirements do not encompass all electrically related aspects and material of the facilities being installed, then the requirements referenced and specified in all 260000 series and 337102 series specifications issued with this Contract shall be followed. U.S.

(American) standards (e.g., ASTM, ASME, NEMA, ANSI, IEEE, UL, etc.)

referenced herein for electrical work and material, is made to establish a minimum level of electrical quality and standardization. Other internationally recognized standards such as British Standards (BS), and International Electrotechnical Commission (IEC) standards can be used to define equivalent quality and standardization in compliance with the specifications, if acceptable to the Contracting Officer (C.O.)

If the contractor chooses to use such substitute material, he must demonstrate that equipment complying with foreign standards meet or exceed the same level of quality and standards provided by the referenced standards in these specifications. The Contractor shall submit data sheets for the proposed equipment meeting those standards for approval by the C.O. prior to the material procurement.

If a conflict between the codes and standards required herein, is identified, contractor shall generate a Request for Information (RFI) complete with suggested/recommended course of action for approval by the C.O. prior to commencement of work or procurement of products.

In references to NFPA 70, interpret the "Authority having jurisdiction" or words of similar meaning to refer to the Contracting Officer.

AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI)

ANSI C39.1 (1981; R 1992) Requirements for Electrical Analog Indicating Instruments

ASTM INTERNATIONAL (ASTM)

ASTM A167 (2011) Standard Specification for Stainless and Heat-Resisting Chromium-Nickel Steel Plate, Sheet, and Strip

ASTM A780/A780M (2009; R 2015) Standard Practice for

SECTION 26 11 16 Page 3

Repair of Damaged and Uncoated Areas of Hot-Dip Galvanized Coatings

ASTM D117 (2010) Standard Guide for Sampling, Test Methods, Specifications and Guide for Electrical Insulating Oils of Petroleum Origin

ASTM D3487 (2016) Standard Specification for Mineral Insulating Oil Used in Electrical Apparatus

ASTM D709 (2016) Standard Specification for Laminated Thermosetting Materials

INSTITUTE OF ELECTRICAL AND ELECTRONICS ENGINEERS (IEEE)

IEEE 100 (2000; Archived) The Authoritative Dictionary of IEEE Standards Terms

IEEE 386 (2016) Separable Insulated Connector Systems for Power Distribution Systems Rated 2.5 kV through 35 kV

IEEE C2 (2017) National Electrical Safety Code

IEEE C37.20.3 (2013) Standard for Metal-Enclosed Interrupter Switchgear

IEEE C57.12.00 (2015) General Requirements for Liquid-Immersed Distribution, Power, and Regulating Transformers

IEEE C57.12.29 (2014) Standard for Pad-Mounted Equipment

- Enclosure Integrity for Coastal Environments

IEEE C57.12.80 (2010) Standard Terminology for Power and Distribution Transformers

IEEE C57.12.90 (2015) Test Code for Liquid-Immersed Distribution, Power, and Regulating Transformers

IEEE C57.98 (2011) Guide for Transformer Impulse Tests

IEEE C62.11 (2012) Standard for Metal-Oxide Surge Arresters for Alternating Current Power Circuits (>1kV)

INTERNATIONAL ELECTRICAL TESTING ASSOCIATION (NETA)

NETA ATS (2013) Standard for Acceptance Testing Specifications for Electrical Power Equipment and Systems

INTERNATIONAL ELECTROTECHNICAL COMMISSION (IEC)

IEC 60076-1 (2011) Power transformers – Part 1: General

SECTION 26 11 16 Page 4

IEC 60282-1 (2014) High-voltage fuses – Part 1:

Current-limiting fuses

IEC 60947-1 (2014) Low-voltage switchgear and controlgear – Part 1: General rules

IEC 62271-1 (2017) High-voltage switchgear and controlgear – Part 1: Common specifications for alternating current switchgear and controlgear

IEC 62271-202 (2006) High-voltage switchgear and controlgear - Part 202: High-voltage/low voltage prefabricated substation

IEC 62271-103 (2011) High-voltage switchgear and controlgear- Part 103: Switches for rated voltages Above 1 kV up to and including 52 kV

IEC 62271-105 (2012) High-voltage switchgear and controlgear – Part 105: Alternating current switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV

NATIONAL ELECTRICAL MANUFACTURERS ASSOCIATION (NEMA)

NEMA LI 1 (1998; R 2011) Industrial Laminating Thermosetting Products

NATIONAL FIRE PROTECTION ASSOCIATION (NFPA)

NFPA 70 (2017) National Electrical Code

UNDERWRITERS LABORATORIES (UL)

UL 467 (2013) Grounding and Bonding Equipment

1.2 RELATED REQUIREMENTS

Section 26 08 00 APPARATUS INSPECTION AND TESTING applies to this section, with the additions and modifications specified herein.

1.3 DEFINITIONS

Unless otherwise specified or indicated, electrical and electronics terms used in these specifications, and on the drawings, shall be as defined in IEEE 100 .

1.4 SUBMITTALS

Government approval is required for submittals with a "G" designation;

submittals not having a "G" designation are for information only. When used, a designation following the "G" designation identifies the office that will review the submittal for the Government. Submit the following in accordance with Section 01 33 00 SUBMITTAL PROCEDURES:

SECTION 26 11 16 Page 5

Submit the following:

a. A certification, from the manufacturer, that the technical requirements of this specification shall be met.

b. An outline drawing of the transformer with devices identified (paragraph entitled "Transformer Drawings," item a).

c. ANSI nameplate data of the transformer (paragraph entitled "Transformer Drawings", item b).

d. Routine and other tests (paragraph entitled "Routine and Other Tests"), shall be conducted by the manufacturer and may be witnessed by the government (paragraph entitled "Source Quality Control").

Provide transformer test schedule required by submittal item "SD-11 Closeout Submittals". Provide certified copies of the tests.

e. Provide acceptance test reports required by submittal item "SD-06 Test Reports".

f. Provide operation and maintenance manuals required by submittal item "SD-10 Operation and Maintenance Data".

1.4.1 Coordinated Submittal Reviews

SD-02 Shop Drawings

Package Substation Drawings; G M

Include wiring diagrams and installation details of equipment indicating proposed location, layout and arrangement, control panels, accessories, piping, ductwork, and other items that must be shown to ensure a coordinated installation. Wiring diagrams shall identify circuit terminals and indicate the internal wiring for each item of equipment and the interconnection between each item of equipment. Drawings shall indicate adequate clearance for operation, maintenance, and replacement of operating equipment devices. Submittals shall include the nameplate data, size, and capacity. Submittals shall also include applicable federal, military, industry, and technical society publication references.

SD-03 Product Data

Package substation; G M

Package substation (liquid-filled); G M

Submittal shall include manufacturer's information for each component, device, and accessory provided with the transformer.

SD-06 Test Reports

Acceptance checks and tests; G M

SD-07 Certificates

Paint coating system; G M

Transformer Losses; G M

SECTION 26 11 16 Page 6

SD-09 Manufacturer's Field Reports

Load Interrupter Switch production tests; G M

Package substation transformer design tests (liquid-filled); G M

Unit substation transformer routine and other tests (liquid-filled);

G M

1.5 QUALITY ASSURANCE

1.5.1 Drawing Requirements

1.5.1.1 Unit Substation Drawings

Drawings shall include, but are not limited to the following:

a. An outline drawing, with front, top, and side views showing incoming, medium voltage Ring-Main-Unit (RMU) transformer, and outgoing sections. Include switchboard as part of the total unit substation.

b. One-line diagram showing load interrupter switch, current transformers, meters, and ampere rating of bus bars.

c. Elementary diagrams and wiring diagrams with terminals identified, and indicating prewired interconnections between items of equipment and the interconnection between the items.

d. Provisions for future extension.

1.5.1.2 Transformer Drawings

Drawings shall include, but are not limited to the following:

a. An outline drawing, with front, top, and side views.

b. ANSI nameplate data.

c. One-line diagram showing high side RMU, transformer section and secondary side of distribution cabinet.

1.5.2 Paint Coating System

Submit IEEE C57.12.29 coating system performance requirement tests. When interrupter switchgear and transformer are provided by two different manufacturers, each one shall provide certification.

1.5.3 Transformer Losses

Submit certification from the manufacturer indicating conformance with the paragraph entitled "Specified Transformer Losses".

1.5.4 Substation Product Data

Submittal shall include manufacturer's information for each component, device, and accessory provided with the equipment.

SECTION 26 11 16 Page 7

1.5.5 Test Reports

Submit report of acceptance test results as specified by paragraph entitled "Field Quality Control."

1.5.6 Regulatory Requirements

In each of the publications referred to herein, consider the advisory provisions to be mandatory, as though the word, "shall" had been substituted for "should" wherever it appears. Interpret references in these publications to the "authority having jurisdiction," or words of similar meaning, to mean the Contracting Officer. Equipment, materials, installation, and workmanship shall be in accordance with the mandatory and advisory provisions of NFPA 70 unless more stringent requirements are specified or indicated.

1.5.7 Standard Products

Provide materials and equipment that are products of manufacturers regularly engaged in the production of such products which are of equal material, design and workmanship. Products shall have been in satisfactory commercial or industrial use for 5 years prior to bid opening. The 5-year period shall include applications of equipment and materials under similar circumstances and of similar size. The product shall have been on sale on the commercial market through advertisements, manufacturers' catalogs, or brochures during the 5-year period. Where two or more items of the same class of equipment are required, these items shall be products of a single manufacturer; however, the component parts of the item need not be the products of the same manufacturer unless stated in this section.

1.5.7.1 Material and Equipment Manufacturing Date

Products manufactured more than 2 years prior to date of delivery to site shall not be used, unless specified otherwise.

1.6 MAINTENANCE

1.6.1 Assembled Operation and Maintenance Manuals

Manuals shall be assembled in durable, hard covered, water resistant binders. The manual shall be assembled and indexed in the order noted in a table of contents. The contents of the assembled operation and maintenance manuals shall be as follows:

a. Manufacturer's O&M information required by the paragraph entitled, "SD-10 Operation and Maintenance Data."

b. Catalog data required by the paragraph entitled, "SD-03 Product Data."

c. Drawing required by the paragraph entitled, "SD-02 Shop Drawings."

d. Price for spare parts and supply list

e. Routine and field acceptance test reports

1.6.2 Operation and Maintenance Data

Submit operation and maintenance data in accordance with Section 01 78 23

SECTION 26 11 16 Page 8

OPERATION AND MAINTENANCE DATA and as specified herein.

1.7 WARRANTY

The equipment items shall be supported by service organizations which are reasonably convenient to the equipment installation in order to render satisfactory service to the equipment on a regular and emergency basis during the warranty period of the contract.

PART 2 PRODUCTS

2.1 PRODUCT COORDINATION

Products and materials not considered to be secondary unit substations and related accessories are specified in Section 33 71 02 UNDERGROUND

ELECTRICAL DISTRIBUTION.

2.2 PACKAGE SUBSTATION

2.2.1 General

The units are to be supplied as fully equipped package substations, including:

1) Outer housing

2) High voltage switching cubicles

3) Distribution transformers

4) Low voltage panel

5) Accessories

Package Substations shall be a packaged type unit, consisting of Primary Side Ring-Main-Unit (RMU), oil-filled Transformer Section and Secondary Side Distribution Cabinet. Complete packaged unit shall be a standard product by a manufacturer, factory fabricated and delivered on construction site as one unit. Unit shall be provided in a weatherproof outer housing or enclosure to be installed on a concrete pad. Package Substation assembled on site shall not be acceptable. Substation shall comply with IEC 62271-202 . Per Cent impedance shall be no more than 5% or as required by the MEW codes and standards if less.

2.2.2 Enclosure

Substation shall be completely self-contained, mounted upon a 3mm thick galvanized steel baseframe, factory assembled in a totally enclosed, aesthetically acceptable metal clad, vandal-proof and weatherproof housing ready for placing into position upon a concrete base. The complete housing assembly shall be provided with four lifting eyes located on the sloping roof for easy lifting and positioning of the whole unit at the site by crane. The substation shall be able to be lifted without damage or distortion. The transformer shall be located in the middle of the substation while the high voltage (HV)and low voltage (LV) compartments are located at both ends of the substation adjacent to the corresponding bushings of the transformer. The housing of the kiosk shall be made of corrosion resistant 2mm ALUZINK steel sheets. The four corner posts of the substation shall be made of minimum 3mm galvanized steel sheets to enhance the strength of the whole assembly. Finish coat shall be powder paint of polymer resin base color to RAL 7032.

SECTION 26 11 16 Page 9

2.2.3 Interior Compartments

The transformer, LV and HV compartments shall be completely separated by ALUZINK steel sheet. The barrier between LV and transformer compartment shall be provided with a small door for access to the transformer thermometer. HV and LV compartments are individually accessible by their own double leaf doors from outside. The transformer compartment shall also be provided with one single leaf louvered door at the side for access to the transformer tap changer and thermometer. Labyrinthine louvers with sand traps at the bottom shall form the sidings of the transformer compartment to assure free entry and exhaust of air to maintain the inside temperature within limits. Openings shall be located at the lower and upper sides of the slanted roof to allow air circulation as part of the ventilation design. Ensclosure shall have a thermostatically controlled exhaust fan.

Each compartment shall be equipped with internal lighting consisting of a minimum 10 watt LED lamp controlled by their respective door micro-switches. HV and LV compartments shall be minimum IP43 rated and transformer compartment shall be minimum IP23 rated.

2.2.4 Kiosk Doors

The outer doors of the kiosk shall be wide and provided with pneumatic stoppers. They shall be provided with heavy-duty hinges to prevent distortion and misalignment. Locks shall be provided with door swing handles in such a way that the key for the LV door can open only the LV door while the key for the HV door can open both the LV and HV doors. When closed, the doors shall be firmly locked to prevent entry of dust, vermin and rainwater.

The HV doors shall be provided with a drawing pocket on the inside and a weatherproof nameplate showing the substation number on the outside.

2.2.5 Grounding

The substation shall form a complete metallic structure bolted together and each compartment shall be provided with grounding busbars. Bonding and interconnection of the grounding buses shall be made of 70mm2 bare stranded copper conductors. The ring main unit shall have a 25x3mm grounding bus while the low voltage switchgear shall have a 50x10mm grounding bus to which connection to the grounding system at the site shall be made.

2.2.6 Ring Main Unit (RMU)

The RMU shall be non-extensible, type tested, SF6 insulated type and have the following salient features:

a. Weather proof enclosure for switching devices

b. 12/15kV 630 Amps 50/60Hz Ring Switch - 2 Nos

c. 12/15kV 200 Amps 50/60Hz Fuse Switch - 1 No

d. Ring Earthing Switches - 2 Nos

e. Transformer Earthing Switch - 1 No

f. Cable Testing device - 2 Nos

g. Safety Interlocks

h. P.F. Withstand up to 38 kV

i. Impulse withstand up to 95 kVp

j. Short Circuit capacity 20 / 21 / 25 kA

k. Common operating handle for all switches

l. Tripping facility based on command from transformer protective device.

SECTION 26 11 16 Page 10

m. Rated short circuit making current, kA 52.5

n. Rated short time current, 3 sec., kA 21

o. Closed loop breaking current, A 630

p. Peak withstand current, kA 52.5

RMU shall comply with IEC 62271-1 , IEC 62271-103 , IEC 62271-105 . HV Fuses shall comply with IEC 60282-1 .

2.2.6.1 Ring Main Switches

The General Technical data of the switches are as follows:

a. The 3-way ring main unit shall have three vacuum circuit breakers.

Mechanically interlocked earthing switches shall be provided in all switches.

b. Provide sealed tank filled with SF6 gas at nearly atmospheric pressure containing busbars and standard IEC/DIN bushing for connection of cables.

c. Provide pressure gauge connected to the tank along with a refilling valve.

d. Provide capacitive voltage indication test points for the three phases of incoming and outgoing switches.

e. Each circuit breaker shall be operated by a spring-operated mechanisms. These mechanisms shall be situated outside the tank, behind the front cover, and easily accessible. Padlocking features shall be included in the design of these mechanisms. The stored energy spring mechanism for the breakers shall be operated by means of an operating handle.

f. RMU shall have a nameplate showing the manufacturer's name, manufacturer's serial number, voltage rating in kV, current rating in amperes, rated frequency and the rated withstand current in kA.

g. RMU shalll have mechanical interlocks that operate in such a way that the switches must be open first before closing the earthing switch and vice versa.

h. RMU operating handles shall be provided.

2.2.7 Low Voltage Switchgear

2.2.7.1 General

The low voltage switchgear shall be located in its own compartment. The access to the panel will be through the front doors. The compartment shall be provided with removable gland plates with knockouts located at the bottom part. LV cable clamps suitable for 3 x 185/95-mm² copper or 4 x 300 mm² shall be mounted just above the gland plates. Low voltage switchgear shall comply with IEC 60947-1 .

2.2.7.2 Metering

Provide meters to indicate votage and current for each phase. Meters shall be flush mounted on the metering swing door. Current transformers shall be accessible from the front. A side wall mounted lockable kilowatt-hour meter box with kWh meter, 1600/5A, shall be provided on the right outside the HV compartment.

2.2.7.3 Additional Salient Features

a. 1600 Amps Busbars (or sized for kva rating)

b. Short Circuit withstand up to 50kA/0.5 sec.(per MEW requirements)

SECTION 26 11 16 Page 11

c. 1600 Amps 50Hz Off-Load Isolator / ACB for Transformer Control(or sized for kva rating)

d. 6 Nos 500 Amps 50Hz feeder control MCCBs for Low Voltage Board or as specified on the drawings.

2.3 Incoming Cable Terminations

Provide medium voltage cable terminations as specified in Section 33 71 02

UNDERGROUND ELECTRICAL DISTRIBUTION.

a. 630 ampere deadbreak connector ratings: Voltage: 12 kV, 95 kV BIL 25 kV, 125 kV BIL. Short time rating: 40,000 rms symmetrical amperes.

Connectors shall have 200 ampere bushing interface for surge arresters.

b. Provide one set of three grounding elbows for each secondary unit substation. Grounding elbows and feed-thru inserts shall be delivered to the contracting officer.

2.3.1 Surge Arresters

IEEE C62.11 , rated 15. Arresters shall be intermediate class. Arresters shall be equipped with mounting brackets suitable for the indicated installations and installed on every unit.

2.3.2 Load Interrupter Switch

IEEE C37.20.3 , UL or equivalent listed and labeled load interrupter switchgear. Provide a three-pole, single-throw, deadfront, metal-enclosed, load interrupter switch with manual stored energy operator. Switch shall be non-fused and designed for easy inspection. The switch shall be operated by a manually charged spring stored energy mechanism which shall simultaneously disconnect or connect ungrounded conductors. The moveable blade of the switch shall be deenergized when in the open position. The mechanism shall enable the switch to close against a fault equal to the momentary rating of the switch without affecting its continuous current carrying or load interrupting ability. A ground bus shall extend the width of the switch enclosure and shall be bolted directly thereto. Connect frame of unit to ground bus. The door shall have an inspection window to allow full view of the position of the three switch blades through the closed door. Switch shall have provision for padlocking in the open and closed positions. Switch ratings shall be as follow:

Rated Maximum Voltage, kV

Rated Withstand Impulse Voltage, kV BIL

Continuous and Load Interrupting Current, A

Short-Circuit Current kA rms Sym

Short-Time / Fault-Close Current kA

15 95 630 25 40

2.3.3 Primary Protective Device Connection

Connections between the primary protective device and transformer shall be bus mounted on porcelain insulators, and sized and braced to withstand the specified short-circuit and short-time currents.

SECTION 26 11 16 Page 12

2.4 Transformer (Liquid-Filled) Section

IEC 60076-1 . Mineral oil liquid-filled. Transformer base,including the tank, radiators, flanges, base, lifting provisions, and hardware, shall be fabricated of ASTM A167 type 304, 304L, or 316 stainless steel.

Transformer base shall include any part of the transformer that is within 75 mm of concrete pad. Paint coating system shall comply with IEEE C57.12.29 . Transformers shall be 3-phase hermetically sealed units with oil-immersed copper windings and natural cooling (ONAN type), and be made with corrugated sheet steel tank.

2.4.1 Transformer Ratings

a. Cooling Class: ONAN-Liquid-filled, self-cooled.

b. Frequency: 50 Hz.

c. Phases: Three phase.

d. Rated Kilovolt Amperes: As indicated on the drawings kVA

e. Voltage Rating: 11 kV 415/240

f. Impedance: Minimum tested impedance shall not be less than 5 percent at 85 degrees C.

g. Insulation Level: 95 kV BIL

h. Temperature Rise: 65 degree C average winding temperature rise above a 30 degree ambient.

i. Audible Sound Levels: Audible sound levels shall comply with the following:

kVA Range DECIBELS (MAX)

225-300 55

301-500 56

501-700 57

701-1000 58

1001-1500 60

1501-2000 61

2001-2500 62

2501-3000 63

3001-4000 64

SECTION 26 11 16 Page 13

2.4.2 Transformer Accessories

The transformer shall have the following accessories:

a. Four 2.5 percent full capacity taps, two above and two below rated primary voltage.

b. Tap changer, with external, pad-lockable, manual type operating handle, for changing tap setting when transformer is de-energized.

c. Dead-front high-voltage bushings; IEEE 386 . 15 kV, 95 kV BIL.

Provide 600 ampere one piece deadbreak apparatus bushings.

d. Parking stands: Provide a parking stand near each dead-front bushing.

e. Insulated low-voltage neutral bushing with lugs for ground cable and removable ground strap.

f. Ground pads.

g. Liquid-level indicator.

h. Pressure-vacuum gage.

i. Liquid temperature indicator.

j. Drain and filter valves.

k. Pressure relief device, top mounted, Qualitrol series 208.

l. Diagrammatic stainless steel or laser-etched anodized aluminum nameplate in accordance with IEEE C57.12.00 and as modified or supplemented by this section.

m. Transformer base with provisions for jacking and for rolling in either direction.

n. Lifting provisions.

o. Bolted transformer top or welded top with bolted handhole access.

2.4.3 Insulating Liquid

a. Mineral oil: ASTM D3487, Type II, tested in accordance with ASTM D117.

Provide identification of transformer as "non-PCB" and "Type II mineral oil" on the nameplate.

2.5 Instruments

ANSI C39.1 for electrical indicating switchboard style instruments, with 2 percent accuracy. The ac ammeters and voltmeters shall be minimum of 50.8 mm square, with 4.36 rad scale. Provide single phase indicating instruments with flush-mounted transfer switches for reading three phases.

2.5.1 Ac Ammeters

Self-contained 50 Hz and standard product of manufacturer.

SECTION 26 11 16 Page 14

2.5.2 Ac Voltmeters

Self-contained.

2.5.3 Instrument Control Switches

Provide rotary cam-operated type with positive means of indicating contact positions. Switches shall have silver-to-silver contacts enclosed in a protective cover which can be removed to inspect the contacts.

2.6 Insulated Barriers

Where insulated barriers are required by reference standards, provide barriers in accordance with NEMA LI 1 , Type GPO-3, 6.35 mm minimum thickness.

2.7 Terminal Boards

Provide with engraved plastic terminal strips and screw type terminals for external wiring between components and for internal wiring between removable assemblies. Terminal boards associated with current transformers shall be short-circuiting type. Terminate conductors for current transformers with ring-tongue lugs. Terminal board identification shall be identical in similar units. External wiring shall be color coded consistently for similar terminal boards.

2.8 Wire Marking

Mark control and metering conductors at each end. Provide factory-installed, white, plastic tubing, heat stamped with black block type letters on factory-installed wiring. On field-installed wiring, provide white, preprinted, polyvinyl chloride (PVC) sleeves, heat stamped with black block type letters. Each sleeve shall contain a single letter or number, shall be elliptically shaped to securely grip the wire, and shall be keyed in such a manner to ensure alignment with adjacent sleeves. Provide specific wire markings using the appropriate combination of individual sleeves. Each wire marker shall indicate the device or equipment, including specific terminal number to which the remote end of the wire is attached.

2.9 Grounding and Bonding

Provide as specified in Section33 71 02 UNDERGROUND ELECTRICAL

DISTRIBUTION.

2.10 Padlocks

Padlocks shall be provided for secondary unit substation equipment.

Padlocks shall be keyed alike.

2.11 Cast-in-Place Concrete

Concrete associated with electrical work for other than encasement of underground ducts shall be 30 MPa minimum 28-day compressive strength unless specified otherwise. All concrete shall conform to the requirements of Section 03 30 00 CAST-IN-PLACE CONCRETE.

SECTION 26 11 16 Page 15

2.12 MANUFACTURER'S NAMEPLATES

Each item of equipment shall have a nameplate bearing, as a minimum, the manufacturer's name, address, model number, and serial number securely affixed in a conspicuous place; the nameplate of the distributing agent will not be acceptable. Include additional information as applicable to fully identify the equipment. Nameplates shall be made of noncorrosive metal. Equipment containing liquid dielectric shall include the type of dielectric on the nameplate. Sectionalizer switch nameplates shall have a schematic with all switch positions shown and labeled. As a minimum, provide nameplates for transformers, circuit breakers, meters, switches, and switchgear.

2.13 FIELD FABRICATED NAMEPLATES

ASTM D709. Provide laminated plastic nameplates for each secondary unit substation, equipment enclosure, relay, switch, and device; as specified in this section or as indicated on the drawings. Each nameplate inscription shall identify the function and, when applicable, the position. Nameplates shall be melamine plastic, 3 mm thick, white with black center core. Surface shall be matte finish. Corners shall be square. Accurately align lettering and engrave into the core. Minimum size of nameplates shall be 25 by 65 mm. Lettering shall be a minimum of

6.35 mm high normal block style.

2.14 WARNING SIGNS

Provide warning signs for the enclosures of secondary unit substations having a nominal rating exceeding 600 volts.

a. When the enclosure integrity of such equipment is specified to be in accordance with IEEE C57.12.29 , such as for secondary unit substations, provide self-adhesive warning signs on the outside of the high voltage compartment door(s). Sign shall be a decal and shall have nominal dimensions of 178 by 255 mm with the legend "DANGER HIGH VOLTAGE" printed in two lines of nominal 50 mm high letters. The word "DANGER" shall be in white letters on a red background and the words "HIGH VOLTAGE" shall be in black letters on a white background. Decal shall be Panduit No. PPSO710D72 or approved equal.

2.15 SOURCE QUALITY CONTROL

2.15.1 Equipment Test Schedule

The Government reserves the right to witness tests. Provide equipment test schedules for tests to be performed at the manufacturer's test facility. Submit required test schedule and location, and notify the Contracting Officer 30 calendar days before scheduled test date. Notify Contracting Officer 15 calendar days in advance of changes to scheduled date.

Test Instrument Calibration

1. The manufacturer shall have a calibration program which assures that all applicable test instruments are maintained within rated accuracy.

2. The accuracy shall be directly traceable to the National Institute of Standards and Technology.

SECTION 26 11 16 Page 16

3. Instrument calibration frequency schedule shall not exceed 12 months for both test floor instruments and leased specialty equipment.

4. Dated calibration labels shall be visible on all test equipment.

5. Calibrating standard shall be of higher accuracy than that of the instrument tested.

6. Keep up-to-date records that indicate dates and test results of instruments calibrated or tested. For instruments calibrated by the manufacturer on a routine basis, in lieu of third party calibration, include the following:

(a) Maintain up-to-date instrument calibration instructions and procedures for each test instrument.

(b) Identify the third party/laboratory calibrated instrument to verify that calibrating standard is met.

2.15.2 Load Interrupter Switch Production Tests

IEEE C37.20.3 . Furnish reports of production tests performed on the actual equipment for this project. Required tests shall be as follows:

Production Tests

1. Dielectric

2. Mechanical operation

3. Grounding of instrument transformer case

4. Electrical operation and control wiring

2.15.3 Transformer Design Tests (Liquid-Filled)

In accordance with IEEE C57.12.00 and IEEE C57.12.90 . Additionally, IEEE C57.12.80 section 5.1.2 states that "design tests are made only on representative apparatus of basically the same design." Submit design test reports (complete with test data, explanations, formulas, and results), in the same submittal package as the product data and shop drawings for the specified transformer. Design tests shall have been performed prior to the award of this contract.

a. Tests shall be certified and signed by a internationally recognized testing agency and signed.

b. Temperature rise: "Basically the same design" for the temperature rise test means a unit-substation transformer with the same coil construction (such as wire wound primary and sheet wound secondary), the same kVA, the same cooling type (ONAN), the same temperature rise rating, and the same insulating liquid as the transformer specified.

c. Lightning impulse: "Basically the same design" for the lightning impulse dielectric test means a unit-substation transformer with the same BIL, the same coil construction (such as wire wound primary and sheet wound secondary), and a tap changer, if specified. Design

SECTION 26 11 16 Page 17 lightning impulse tests shall include both the primary and secondary windings of that transformer.

1. IEEE C57.12.90 paragraph 10.3 entitled "Lightning Impulse Test Procedures," and IEEE C57.98 .

2. State test voltage levels.

3. Provide photographs of oscilloscope display waveforms or plots of digitized waveforms with test report.

d. Lifting and moving devices: "Basically the same design" for the lifting and moving devices test means a transformer in the same weight range as the transformer specified.

e. Pressure: "Basically the same design" for the pressure test means a unit-substation transformer with a tank volume within 30 percent of the tank volume of the transformer specified.

2.15.4 Transformer Routine and Other Tests (Liquid-Filled)

In accordance with IEEE C57.12.00 and IEEE C57.12.90 . Routine and other tests shall be performed by the manufacturer on the actual transformer prepared for this project to ensure that the design performance is maintained in production. Submit test reports, by serial number and receive approval before delivery of equipment to the project site.

Required tests and testing sequence shall be as follows:

a. Cold resistance measurements (provide reference temperature)

b. Phase relation

c. Ratio

d. Insulation power-factor by manufacturer's recommended test method.

e. No-load losses (NLL) and excitation current

f. Load losses (LL) and impedance voltage

g. Dielectric

1. Impulse: Per IEEE C57.12.90 paragraph 10.3 entitled "Lightning Impulse Test Procedures," and IEEE C57.98 . Test the primary winding only.

(a) State test voltage levels

(b) Provide photographs of oscilloscope display waveforms or plots of digitized waveforms with test reports. As an alternative, photographs of oscilloscope display waveforms or plots of digitized waveforms may be hand-delivered at the factory witness test.

2. Applied voltage

3. Induced voltage

h. Leak

SECTION 26 11 16 Page 18

i. Sample insulating liquid. Sample shall be tested for:

1. Dielectric breakdown voltage

2. Acid neutralization number

3. Specific gravity

4. Interfacial tension

5. Color

6. Visual condition

7. Water in insulating liquid

8. Measure dissipation factor or power factor

j. Perform dissolved gas analysis (DGA)

PART 3 EXECUTION

3.1 INSTALLATION

Electrical installations shall conform to IEEE C2 , NFPA 70 , and to the requirements specified herein.

3.2 GROUNDING

NFPA 70 and IEEE C2 , except that grounds and grounding systems shall have a resistance to solid earth ground not exceeding 5 ohms or as per MEW regulations, whichever is smaller. .

3.2.1 Grounding Electrodes

Provide driven ground rods as specified in Section 33 71 02 UNDERGROUND ELECTRICAL DISTRIBUTION. Connect ground conductors to the upper end of the ground rods by exothermic weld or compression connector. Provide compression connectors at equipment end of ground conductors.

3.2.2 Substation Grounding

Provide bare copper cable not smaller than No. 4/0 AWG not less than 610 mm below grade interconnecting the indicated ground rods. Surge arrester and neutrals shall be bonded directly to the transformer enclosure and then to the grounding electrode system with bare copper conductors, sized as shown. Lead lengths shall be kept as short as practicable with no kinks or sharp bends. Substation transformer neutral connections shall not be smaller than No. 1/0 AWG. When work in addition to that indicated or specified is directed to obtain the specified ground resistance, the provision of the contract covering "Changes" shall apply. Fence and equipment connections shall not be smaller than No. 4 AWG. Ground fence at each gate post and cornerpost and at intervals not exceeding 3050 mm.

Bond each gate section to the fence post through a 3 by 25 mm flexible braided copper strap and clamps.

SECTION 26 11 16 Page 19

3.2.3 Connections

Make joints in grounding conductors and loops by exothermic weld or compression connector. Exothermic welds and compression connectors shall be installed as specified in Section 33 71 02 UNDERGROUND ELECTRICAL DISTRIBUTION, paragraph regarding "Grounding".

3.2.4 Grounding and Bonding Equipment

UL 467 , except as indicated or specified otherwise.

3.3 INSTALLATION OF EQUIPMENT AND ASSEMBLIES

Install and connect unit substations furnished under this section as indicated on project drawings, the approved shop drawings, and as specified herein.

3.3.1 Interrupter Switchgear

IEEE C37.20.3 .

3.3.2 Field Applied Painting

Where field applied painting of enclosures is required to correct damage to the manufacturer's factory applied coatings, provide manufacturer's recommended coatings and apply in accordance with manufacturer's instructions.

3.3.3 Field Fabricated Nameplate Mounting

Provide number, location, and letter designation of nameplates as indicated. Fasten nameplates to the device with a minimum of two sheet-metal screws or two rivets.

3.3.4 Warning Sign Mounting

Provide the number of signs required to be readable from each accessible side, but space the signs a maximum of 9 meters apart.

3.3.5 Galvanizing Repair

Repair damage to galvanized coatings using ASTM A780/A780M , zinc rich paint, for galvanizing damaged by handling, transporting, cutting, welding, or bolting. Do not heat surfaces that repair paint has been applied to.

3.4 FOUNDATION FOR EQUIPMENT AND ASSEMBLIES

3.4.1 Exterior Location

Mount unit substation on concrete slab. Unless otherwise indicated, the slab shall be at least 200 mm thick, reinforced with a 152 by 152 - MW19 by MW19 mesh placed uniformly 100 mm from the top of the slab. Slab shall be placed on a 150 mm thick, well-compacted gravel base. Top of concrete slab shall be approximately 100 mm above the finished grade. Edges above grade shall have 15 mm chamfer. The slab shall be of adequate size to project at least 200 mm beyond the equipment. Provide conduit turnups and cable entrance space required by the equipment to be mounted. Seal voids around conduit openings in slab with water- and oil-resistant caulking or

SECTION 26 11 16 Page 20 sealant. Seals shall be of sufficient strength and durability to protect all energized live parts of the equipment from rodents, insects, or other foreign matter. Cut off and bush conduits 75 mm above slab surface.

3.4.2 Cast-in-Place Concrete

Cast-in-place concrete work shall conform to the requirements of Section

03 30 00 CAST-IN-PLACE CONCRETE.

3.5 Padlocks

Provide padlocks for secondary unit substation equipment.

3.6 FIELD QUALITY CONTROL

3.6.1 Performance of Acceptance Checks and Tests

Perform in accordance with the manufacturer's recommendations and include the following visual and mechanical inspections and electrical tests, performed in accordance with NETA ATS.

3.6.1.1 Interrupter Switchgear (Air Switches)

a. Visual and Mechanical Inspection

1. Compare equipment nameplate data with specifications and approved shop drawings.

2. Inspect physical and mechanical condition.

3. Confirm correct application of manufacturer's recommended lubricants.

4. Verify appropriate anchorage and required area clearances.

5. Verify appropriate equipment grounding.

6. Verify correct blade alignment, blade penetration, travel stops, and mechanical operation.

7. Verify that fuse sizes and types correspond to approved shop drawings.

8. Verify that each fuse holder has adequate mechanical support.

9. Inspect all bolted electrical connections for high resistance using low-resistance ohmmeter, verifying tightness of accessible bolted electrical connections by calibrated torque-wrench method, or performing thermographic survey.

10. Test interlocking systems for correct operation and sequencing.

11. Verify correct phase barrier materials and installation.

12. Compare switch blade clearances with industry standards.

13. Inspect all indicating devices for correct operation

b. Electrical Tests

SECTION 26 11 16 Page 21

1. Perform insulation-resistance tests.

2. Perform over-potential tests.

3. Perform resistance measurements through all bolted connections with low-resistance ohmmeter, if applicable.

4. Measure closed contact-resistance across each switch blade.

5. Verify heater operation.

3.6.1.2 Transformers (Liquid-Filled)

a. Visual and mechanical inspection

1. Compare equipment nameplate data with specifications and approved shop drawings.

2. Inspect physical and mechanical condition. Check for damaged or cracked insulators and leaks.

3. Verify operation of all alarm, control, and trip circuits from temperature and level indicators, pressure relief device, and fault pressure relay.

4. Inspect all bolted electrical connections for high resistance using low-resistance ohmmeter, verifying tightness of accessible bolted electrical connections by calibrated torque-wrench method, or performing thermographic survey.

5. Verify correct liquid level in transformer tank.

6. Perform specific inspections and mechanical tests as recommended by manufacturer.

7. Verify correct equipment grounding.

8. Verify the presence of transformer surge arresters.

b. Electrical Tests

1. Perform resistance measurements through all bolted connections with low-resistance ohmmeter, if applicable.

2. Perform dissolved gas analysis (DGA).

3. Verify that the tap-changer is set at specified ratio.

4. Verify proper secondary voltage phase-to-phase and phase-to-neutral after energization and prior to loading.

3.6.1.3 Current Transformers

a. Visual and Mechanical Inspection

1. Compare equipment nameplate data with specifications and approved shop drawings.

SECTION 26 11 16 Page 22

2. Inspect physical and mechanical condition.

3. Verify correct connection.

4. Verify that adequate clearances exist between primary and secondary circuit.

5. Inspect all bolted electrical connections for high resistance using low-resistance ohmmeter, verifying tightness of accessible bolted electrical connections by calibrated torque-wrench method, or performing thermographic survey.

6. Verify that all required grounding and shorting connections provide good contact.

b. Electrical Tests

1. Perform resistance measurements through all bolted connections with low-resistance ohmmeter, if applicable.

2. Perform insulation-resistance tests.

3. Perform polarity tests.

4. Perform ratio-verification tests.

3.6.1.4 Metering and Instrumentation

a. Visual and Mechanical Inspection

1. Compare equipment nameplate data with specifications and approved shop drawings.

2. Inspect physical and mechanical condition.

3. Verify tightness of electrical connections.

b. Electrical Tests

1. Verify accuracy of meters at 25, 50, 75, and 100 percent of full scale.

2. Calibrate watthour meters according to manufacturer's published data.

3. Verify all instrument multipliers.

4. Verify that current transformer and voltage transformer secondary circuits are intact.

3.6.1.5 Grounding System

a. Visual and Mechanical Inspection

1. Inspect ground system for compliance with contract plans and specifications.

b. Electrical Tests

SECTION 26 11 16 Page 23

1. Perform ground-impedance measurements utilizing the fall-of-potential method. On systems consisting of interconnected ground rods, perform tests after interconnections are complete.

On systems consisting of a single ground rod perform tests before any wire is connected. Take measurements in normally dry weather, not less than 48 hours after rainfall. Use a portable ground testing megger in accordance with manufacturer's instructions to test each ground or group of grounds. The instrument shall be equipped with a meter reading directly in ohms or fractions thereof to indicate the ground value of the ground rod or grounding systems under test.

2. Submit the measured ground resistance of each ground rod or grounding system, indicating the location of the rod or grounding system. Include the test method and test setup (i.e., pin location) used to determine ground resistance and soil conditions at the time the measurements were made.

3.6.2 Pre-Energization Services

Calibration, testing, adjustment, and placing into service of the installation shall be accomplished by a manufacturer's product field service engineer or independent testing company with a minimum of 2 years of current product experience. The following services shall be performed subsequent to testing but prior to the initial energization. The equipment shall be inspected to ensure that installation is in compliance with the recommendations of the manufacturer and as shown on the detail drawings. Terminations of conductors at major equipment shall be inspected to ensure the adequacy of connections. Bare and insulated conductors between such terminations shall be inspected to detect possible damage during installation. If factory tests were not performed on completed assemblies, tests shall be performed after the installation of completed assemblies. Components shall be inspected for damage caused during installation or shipment to ensure packaging materials have been removed. Components capable of being both manually and electrically operated shall be operated manually prior to the first electrical operation. Components capable of being calibrated, adjusted, and tested shall be calibrated, adjusted, and tested in accordance with the instructions of the equipment manufacturer.

3.6.3 Follow-Up Verification

Upon completion of acceptance checks, settings, and tests, the Contractor shall show by demonstration in service that circuits and devices are in good operating condition and properly performing the intended function.

Test shall require each item to perform its function not less than three times. As an exception to requirements stated elsewhere in the contract, the Contracting Officer shall be given 5 working days' advance notice of the dates and times for checks, settings, and tests.

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SECTION 26 11 16 Page 24

SECTION TABLE OF CONTENTS

DIVISION 26 - ELECTRICAL

SECTION 26 20 02

MINISTRY OF DEFENCE MILITARY ENGINEERING PROJECTS ENGINEERING

DEPARTMENT GENERAL SPECIFICATIONS AND REQUIREMENTS FOR ELECTRICAL

WORKS Revised by Amendment 0002

1. Scope of Work:

-- End of Section Table of Contents --

SECTION 26 20 02 Page 1

SECTION 26 20 02

MINISTRY OF DEFENCE

MILITARY ENGINEERING PROJECTS

ENGINEERING DEPARTMENT

GENERAL SPECIFICATIONS

AND

REQUIREMENTS FOR ELECTRICAL WORKS

Revised by Amendment 0002

1. Scope of Work:

This specification covers the functional and technical requirements for supplying and installing all electrical Works complete in accordance with the requirement of the contract documents, basically:

a. Provide all Electrical Works complete in accordance with the requirements of the Contract Documents.

b. Electrical Works shall be executed by an approved specialist Contractor.

2. MATERIAL DESCRIPTION

2.1 GENERAL

a. Provide complete distribution equipment which shall comprise main low tension switch boards, main and sub-main switch boards, isolators, switch fuses etc..

b. The supply and distribution arrangement shall be as indicated on the schematic diagrams Drawings

2.2 MAIN LOW TENSION PANEL

A. GENERAL:

1. The Main low tension switch boards shall be of indoor construction cellular type, dead front, metal enclosed, multi-cubicle type, free standing, dust and vermin protected, factory fabricated front operated and of clean and modern appearance. The board shall be suitable for operation on 415 Volts, 3 phase/5OHz supply and 3 1MVA rupturing capacity.

2. The switch boards shall be assembled and coordinated by one manufacturer and shall be constructed in accordance…