004. DRAFT Attachment B - Technical Specifications.docx

Attachment B – Technical Specification of 15.5-KV through 245-KV Disconnect Switch, Grounding Air Switch, and Disconnect/Grounding Switch Combination

ATTACHMENT B

DRAFT Technical Specifications

15-kV though 245-kV

Disconnect Switches, Grounding Air Switch, Disconnect/Grounding Switch Combination

IEEE 693 Moderate and High Seismic Qualification Level

Table of Contents

I. SPECIFICATIONS FOR DISCONNECT SWITCHES, GROUNDING AIR SWITCH, AND DISCONNECT/GROUDING SWITCH COMBINATIONS

a. General

b. Ratings and Features

c. Tests

d. Support Structures

e. Support Structure Grounding

f. Seismic Requirements

II. ELECTRICAL DRAWINGS AND DATA TO BE FURNISHED BY THE CONTRACTOR

a. General

b. Table E—Drawing and Data Schedule

c. Final Drawings for Manufacturing/fabrication

d. Final As-built/As-Manufactured Drawings

e. Right to Use The Contractor’s Drawings

f. Mailing Addresses

III. DELIVERY CONTACTS & LOCATIONS, SAFETY AND HEALTH REQUIREMENTS, PACKING LISTS, MATERIAL SAFETY DATA SHEETS, AND WARRANTY

a. Delivery

b. Safety and Health Requirements

c. Packing Lists

d. Material Safety Data Sheets

e. Warranty

f. Inspection/Acceptance

IV. ATTACHEMENT C – DRAWING 31 1075k – SUBSTATIONS STANDARDS – SWITCH OPERATING AND EQUIPMENT PLATFORMS – ELECTRICAL DESIGN AND DETAILS

V. ATTACHEMENT D – REGIONAL COVERAGE MAP

VI. ATTACHEMENT E – OFFEROR’S TECHNICAL PROPOSAL QUALIFICATION DATA SUMMARY TABLE

I. Specification For Disconnect Switches

a. General: Each disconnect switch, free standing grounding air switch, disconnect/grounding switch combinations, and load and line switcher (a.k.a., disconnect switch or switch) shall be designed and tested and shall be capable of performing in accordance with these specifications, NEMA SG6 - Power Switching Equipment, and ANSI/IEEE C37, except as specifically required herein. The disconnect switch minimum clearance from live parts shall be in accordance with Table 124-1 (pages 52 through 56) of IEEE C2-2017 (National Electric Safety Code). In the event of contradictory requirements between ANSI, IEEE, NEMA, and these requirements, the terms of these requirements shall apply. Only new equipment of current manufacture shall be furnished. The equipment shall be outdoor type disconnect switch, grounding air switch, disconnect/grounding switch combinations, and load and line switcher that are single-pole or three-pole, single-throw, group-operated, 60 Hz, rotating insulator type. Each switch shall be complete with all accessories and fittings required to place the unit into operation.

b. Ratings and Features: The switches shall be rated as specified in Table A-D:

TABLE A - 15.5 – 48.3-kV Disconnect Switches Higher voltage switches may be quoted to provide the required elevation, continuous current and/or short-time and peak withstand current ratings (Note 1). The following ratings are the minimum specified ratings for 15.5-kV through 48.3-kV disconnect switches. The full manufacturer’s design ratings shall be provided in Attachment E – Offeror’s Technical Proposal Qualification Data Summary Table.

Pricing Schedule Item Number (PSIN) 11001 11002 11003 12001 12002 12003 12004 13001 13002 13003 13004 14001 14002 14003 14004

Power Frequency (rms kV) Dry (1 minute)

Power Frequency (rms kV) Wet (10 seconds)

Short-time Withstand Currents (kA) IEEE C37.30.1 Table 6

1200A 2000A 3000A 4000A

Peak Withstand Currents (kA) IEEE C37.30.1 Table 6

1200A (Momentary 61-kA) 2000A (Momentary 100-kA) 3000A (Momentary 100-kA) 4000A (Momentary 120-kA)

Ambient Temperature Minimum degrees C Ave. Maximum for 24 hours Maximum degrees C minus 50°C plus 45°C plus 55°C

Unusual Ambient Conditions (Note 6) Airborne Salt, Sand, Dust

Minimum Creepage for High Contamination. Inch (mm) IEEE C37.100.1-2018 Annex C

2. Mounting positions will be provided with the specific orders.

3. The Pricing Schedule will detail the current requirements for each voltage class.

4. Operating mechanism will vary with order.

5. Seismic Level will vary with order.

6. Unusual Conditions will be detailed with specific orders. Medium/High Contamination insulators, including creep requirements, will be identified on a per order basis.

TABLE B - 72.5 - 145-kV Disconnect Switches Higher voltage switches may be quoted to provide the required elevation ratings (Note 1).

The following ratings are the minimum specified ratings for 72.5-kV through 145-kV disconnect switches. The full manufacturer’s design ratings shall be provided in Attachment E – Offeror’s Technical Proposal Qualification Data Summary Table.

Pricing Schedule Item Number (PSIN) 15001 15002 15003

16002 16003

17002 17003 17004

Power Frequency (rms kV) Dry (1 minute)5

Power Frequency (rms kV) Wet (10 seconds)

Short-time Withstand Currents (kA) IEEE C37.30.1 Table 6

2000A 3000A 4000A

Peak Withstand Currents (kA) IEEE C37.30.1 Table 6

2000A (Momentary 100-kA) 3000A (Momentary 120-kA) 4000A (Momentary 120-kA)

8-0 ± 1-0

Ground blades for single phase switch are not applicable.

Ground blades for single phase switch are not applicable.

Mechanical Interlocks for single phase switch are not applicable.

Mechanical Interlocks for single phase switch are not applicable.

Key Interlocks for single phase switch are not applicable.

Key Interlocks for single phase switch are not applicable.

Ambient Temperature Minimum degrees C Ave. Maximum for 24 hours Maximum degrees C minus 50°C plus 45°C plus 55°C

Unusual Ambient Conditions (Note 6) Airborne Salt, Sand, Dust

Minimum Creepage for High Contamination. Inch (mm) IEEE C37.100.1-2018 Annex C

2. Mounting positions will be provided with the specific orders.

3. The Pricing Schedule will detail the current requirements for each voltage class.

4. Operating mechanism will vary with order.

6. Unusual Conditions will be detailed with specific orders. Medium/High Contamination insulators, including creep requirements, will be identified on a per order basis.

TABLE C - 170 - 245-kV Disconnect Switches Higher voltage switches may be quoted to provide the required elevation ratings (Note 1).

The following ratings are the minimum specified ratings for 170-kV through 245-kV disconnect switches. The full manufacturer’s design ratings shall be provided in Attachment E – Offeror’s Technical Proposal Qualification Data Summary Table.

Pricing Schedule Item Number (PSIN) 18001 18002 18003

19002 19003 19004 19005 19006

Power Frequency (rms kV) Dry (1 minute)5

Power Frequency (rms kV) Wet (10 seconds)

Short-time Withstand Currents (kA) IEEE C37.30.1 Table 6

2000A 3000A 4000A

Peak Withstand Currents (kA) IEEE C37.30.1 Table 6

2000A (Momentary 100-kA) 3000A (Momentary 120-kA) 4000A (Momentary 120-kA)

Approximate Terminal Height Low Bus (ft-in)

Approximate Terminal Height High Bus (ft-in)

Ground blades for single phase switch are not applicable.

Ground blades for single phase switch are not applicable.

Mechanical Interlocks for single phase switch are not applicable.

Mechanical Interlocks for single phase switch are not applicable.

Key Interlocks for single phase switch are not applicable.

Key Interlocks for single phase switch are not applicable.

Ambient Temperature Minimum degrees C Ave. Maximum for 24 hours Maximum degrees C minus 50°C plus 45°C plus 55°C

Unusual Ambient Conditions (Note 6) Airborne Salt, Sand, Dust

Minimum Creepage for Medium Contamination. Inch (mm) IEEE C37.100.1-2018 Annex C

Minimum Creepage for High Contamination. Inch (mm) IEEE C37.100.1-2018 Annex C

2. Mounting positions will be provided with the specific orders.

3. The Pricing Schedule will detail the current requirements for each voltage class.

4. Operating mechanism will vary with order.

6. Unusual Conditions will be detailed with specific orders. Medium/High Contamination insulators, including creep requirements, will be identified on a per order basis.

TABLE D – 72.5 – 245-kV Grounding Air Switches Higher voltage switches may be quoted to provide the required elevation ratings.

The following ratings are the minimum specified ratings for 69-kV through 245-kV Grounding Air Switches. The full manufacturer’s design ratings shall be provided in Attachment E – Offeror’s Technical Proposal Qualification Data Summary Table.

Pricing Schedule Item Number (PSIN) 15014 15015 16014 16015 17014 17015 18014 18015 19019 19020 19021 19022

Horizontal Horizontal Horizontal Horizontal

Or as required to meet Seismic Qualification Levels.

Ave. Maximum for 24 hours - plus 45°C Maximum degrees C - plus 55°C

Unusual Ambient Conditions (Note 3) Airborne Salt, Sand, Dust

Minimum Creepage for Medium Contamination.

Inch (mm) IEEE C37.100.1-2018 Annex C

Minimum Creepage for High Contamination. Inch (mm) IEEE C37.100.1-2018 Annex C

2. Ground switches shall be lockable in either the open or closed position.

3. Unusual Conditions will be detailed with specific orders. Medium/High Contamination insulators, including creep requirements, will be identified on a per order basis.

TABLE F – 72.5 – 245-kV Load and Line Switcher with Vacuum Interrupters Pricing Schedule Item Number (PSIN) 15040 15042

16042

19052 19051

TABLE G – 72.5 – 245-kV Load and Line Switcher with SF6 Interrupters

Pricing Schedule Item Number (PSIN) 15043 15045

16045

19054 19055

i. Switch Duty: As per ANSI/IEEE C37.30.

ii. Construction: Switches shall be suitable for the specified ratings.

1. Contacts: Main blade switch contacts shall be self-aligning, self-wiping, high pressure contacts. Fixed contacts shall be of the reverse current loop shape which eliminates contact burning under fault conditions. The current-carrying path shall not be through any spring. If the current path is through a moving pin, means shall be provided to maintain continuous positive contact pressure on the pin. The shape and material used for contacts shall be such that there will be no galling of contact metals when switch is subjected to 1,000 cycle (open-close) operations test.

2. Main Switch and Grounding Blades: The blades shall be of hard-drawn copper or aluminum alloy for carrying the specified continuous and short-time currents. If the blades are attached to castings, the blades and castings shall be connected by welding or by a bolted clamp. A press fit between blade and casting is not acceptable. Main blades of switches shall be counterbalanced to prevent them from falling closed from any position. If spiral springs are used on the hinge end of switch for counterbalancing, the housing shall be designed so that ice cannot build up on the spring(s) to impair switch operation. Pressed-fit joints shall not be subjected to spring pressure during any part of a switch operation.

The movement of all grounding blades shall be in a plane parallel to the main blades. When in the open position, the tip of the blades shall not extend beyond the base of the switch in a direction parallel to the main blades. The ground switch shall ground the clip end of the disconnect switch.

3. Hinge-End and Clip-End Assemblies: Pole unit castings shall be of bronze or aluminum alloy. Bearings in the hinge-end operating levers shall be of the ball, roller, Oilite®-sleeve, plastic, or ball-and-socket type. Bearings shall be firmly fixed in place and shall not require replacement or maintenance before performing at least 1,000 operations. Stops shall be provided in the clips-ends of vertical-break switches, and the switch adjustments shall provide for blades to rest against the stops in the closed positions.

4. Rotating Insulator Bearings: Bearings for the rotating insulator stacks shall be of the tapered-roller or double-ball type. If of the latter type, the bearings shall be of the combination radial and thrust type. Bearings shall be provided with a readily adjustable take-up adjustment.

5. Bearings: Ball or roller bearings shall be sealed, permanently lubricated type or of the type that does not require lubrication, with stainless steel balls or rollers and races.

6. Bases: The bases of switches shall be of metal members of sufficient stiffness to prevent excessive deflection when mounted and operated on supporting structures. Lattice-girder-type bases will not be permitted. Steel material required for the bases shall be galvanized.

7. Assembly: Each pole of each switch shall be completely assembled, adjusted, and bolted to their switch base, less insulators, at the factory prior to shipment.

The switches, insulators, and structures will be assembled and installed by WAPA’s installation/construction contractor(s).

8. Steel bolts, nuts, washers, and locknuts exposed to outdoor weather shall be galvanized in accordance with ASTM A 153-2016, or may be stainless steel material. All necessary bolts, nuts, and washers to complete the erection shall be furnished by the Contractor.

iii. Operating Mechanisms: Operating mechanisms shall affect a smooth, thoroughly controlled movement throughout the entire opening and closing cycles and all rods, shafts, pipe linkages, connectors, operating levers, supports, and fittings shall show no noticeable deflection. Cable connections in lieu of rigid inter-phase rods are not acceptable. Means shall be provided on each switch for taking up loose motion in each part of the mechanism and for adjusting the travel of each blade independently. The design of the mechanism shall be such that the main blades are positively toggled when in the fully open or fully closed position. The outboard or offset bearing of each mechanism shall include: a cast-metal or fabricated steel housing and crank arm, a steel shaft, and either ball or roller bearing. U-bolts and U-bolt type clamps will not be acceptable for final adjustment.

The location of the operating mechanisms shall be on the “outside” end of the support structure as viewed from the hinged side of the disconnect switch.

1. Manually Operated Swing Handle/Worm Gear Switches: The length of lever-type operating handles, when furnished, shall not exceed 3 feet 0 inch. The force required to operate any manual mechanism shall not exceed 50 pounds. Manually operated main blades, including those using gear mechanisms, shall be capable of being opened and closed under icing conditions when specified, and this capability shall be demonstrated by the ice breaking tests specified in paragraph C.i.3. If auxiliary swing handles are required to perform as required under the ice breaking tests, one such handle shall be furnished with each switch. The auxiliary handle shall be readily attachable and detachable, and the gearbox disengaged by a method other than removal of driven pins or set screws when the switch is operated by the ice breaking handle. The attachment points of operating handles to control rod or pipe and of cranks to operating mechanisms shall be at 40 inches above bottom of the base-supporting structure.

The vendor shall include the manufacturer’s actual guaranteed maximum force required to operate the worm gear operators and any auxiliary ice breaking handle operator - as part of the quotation/proposal data - to verify compliance with the above specified not-to-exceed maximum force.

2. Motor Operated Switches: All motor operator control cabinets shall be mounted with the lower edges at a minimum distance of 24 inches above the foundation. The control cabinets shall be NEMA Type 3, dust-tight and rain-tight. The motor operator control cabinet shall be furnished with the terminal blocks needed to terminate the Government’s installation contractor’s wiring to/from the auxiliary switches, as described under the auxiliary switch requirements. A manual handle socket shall be permanently installed, and a handle furnished, with means of disengaging the motor mechanism by movement of the manual handle.

Anticipated external cables that will be run to & terminated in the motor and/or common control cabinet include:

All motor operators:

Each 3-pole motor operable switch shall be operated by one motor for use in operating all three phases simultaneously.

The switch shall be operable by local and remote electrical control and by manual handle. Limit switches shall be provided to prevent over travel. During operation of a disconnecting switch, the control shall keep the motor loaded continuously to prevent the mechanism from alternately leading and lagging the motor. The electric control shall be completely wired. All auxiliary switch and local/remote switch contacts in the motor operator cabinet shall be wired to terminal blocks unless directly wired to other devices in control circuits.

The motor and control circuits shall reliably operate from voltage available at the motor operator, considering conductor voltage drop. The motor and control voltage source is the 125 V battery (located in the service building) that has a voltage range of 105 to 140 V at the battery terminals.

Motor-operated switches shall be capable of being opened by their motor under ice conditions and this capability shall be demonstrated by the ice test specified in paragraph c.i.3. It is desirable that the switches be capable of also being closed by the same mechanism under the iced conditions. However, closing by manual means under iced conditions will be permitted, provided that a readily attachable manual handle is furnished and means provided for easily detaching the motor mechanism.

The motor operator minimum available output torque shall be 20,000 inch-pounds at 90 Vdc input, available throughout the entire operation cycle.

The following features shall be included in the motor operator/control cabinet for single-motor 3-pole mechanically-ganged switches.

(1) Local control “OPEN”, “CLOSE”, and “STOP” switches.

(2) Local-remote [Device 43] Selector Switches: Each mechanism shall be equipped with a separately mounted, manually-operated, “Local-Remote” selector switch. Each “Local-Remote” switch shall be furnished with the following minimum numbers of electrically separate contacts wired in the control circuits or to outgoing terminal blocks are required:

a. A minimum of six contacts that close in the “Remote” and open in the “Local” position to disconnect the following circuits:

i. One contact in the remote closing circuit.

ii. One contact in the remote opening circuit (including remote red lamp).

iii. One contact for each opening coil.

iv. One contact wired to the “b” contact for the remote green lamp.

v. One contact wired to the motor mechanism auxiliary switch “a” and “b” contacts to provide for supervisory control (SCADA) position indication. One “a” contact and one “b” contact shall be wired together at one end, and that end connected to the “Remote” contact, allowing the “Remote” contact to disconnect both the “a” and “b” contacts. The “a” and “b” contacts are the motor mechanism position auxiliary switches required below.

vi. Two contacts for future use, wired to external terminal block points.

b. A minimum of four contacts that close in the “Local” and open in the “Remote” position:

i. One connected to the local close switch.

ii. One connected to the local open switch.

iii. Two contacts for future use, wired to external terminal block points.

(3) Auxiliary switches that follow motor operating mechanism position:

a. A minimum of eight contacts that close in the operator fully closed position for use by WAPA. The closing points of these switches shall be adjustable over the full travel of the motor operator.

b. A minimum of eight contacts that close in the operator fully opened position for use by WAPA. The closing points of these switches shall be adjustable over the full travel of the motor operator.

c. Any additional open or closed contacts necessary for proper operation of motor operator internal control circuits.

(4) Fused knife switches, readily detachable fuse clip assemblies, or circuit breakers shall be installed in each cabinet as over current protection and disconnect devices for the cabinet heaters, convenience outlet and the motor power circuit.

(5) Provide form “C” loss-of-voltage/under voltage alarm contacts to indicate loss of dc and ac control, heater, and motor voltage at the load side of any local fused-knife disconnect switches, detachable fuse clip assembly, or circuit breakers. Separate alarms shall be provided for ac and dc circuits. The ac alarm shall have a time delay of approximately 10 seconds.

(6) Outlet: Each motor-mechanism cabinet shall contain a convenience outlet. The outlet shall be weatherproof, separately fused, 20A, 125V, 2-pole, 3-wire, polarized duplex, grounded with a built-in ground-fault interrupter. The outlet shall have provisions for test and reset of the ground-fault interrupter and shall be protected with a weatherproof cover. The outlet shall be Pass & Seymour/Legrand Catalog No. 2087W, or equal, and mounted so it will be available for use from outside the cabinet without opening the cabinet door.

(7) Cabinet heaters shall be for use on a 240V, single-phase, ac power supply and be thermostatically controlled. The heaters shall have guards to protect personnel from burns and electrical shock.

3. Stops: Each switch shall be equipped with adjustable stops on the operating mechanism near the outboard or offset bearing and on each individual pole for both fully open and fully closed positions. The closed stops shall position each blade such that maximum contact pressure will be achieved between the moving and the fixed contacts. When the switch is in the fully closed position, the hinge-end and clip-end contacts on each side of the main blades shall be horizontal within plus or minus 5 degrees for vertical-break switches. The open stops shall position all three blades in their fully open position such that all blades are at the same angle relative to the base.

Stops shall be provided at bell cranks, independent of/in addition to stops provided at the motor or worm gear operating mechanism.

The stop adjustment methods for all stops shall include means to prevent unintentional change in the adjustment, such as by jam nuts and/or piercing set screws with locking jam nuts.

4. Indicators: Embossed or stamped-metal indicators shall be provided on each vertical operating rod showing when the switch is open or closed. The indicators shall be approximately 7-1/2 inches high and 1-1/2 inches wide, the “closed” indicator painted red and the “open” indicator painted green. The indicators shall be mounted at normal eye level and positioned so that the appropriate indicator directly faces the operator when the operator is in a normal position for operating the switch. If an auxiliary ice breaking handle is furnished, the open-close indicator shall be located above the disconnecting coupling in the vertical operating rod. Indication of the disconnecting switch position shall be readily visible from the ground, and means shall be furnished to prevent false indication if the blade fails to complete the opening or closing operation.

5. Locking: Provisions shall be included for locking the switch in either the open or closed position. Locking means shall be provided above (toward the switch blades) the motor operator disengaging mechanism.

iv. External Auxiliary Switches: When specified, switches shall be equipped with an external auxiliary switch or the equivalent thereof, having at least 10 independent single-pole auxiliary switches which can be changed readily to “Circuit opening” or “Circuit closing”. These switches are for use by WAPA. Each external auxiliary switch shall be mechanically actuated by the operating mechanism of its associated switch and shall follow the position of the switch. Each set of auxiliary switches shall be mounted in a weatherproof metal housing, NEMA Type 3, dust-tight and rain-tight, with a conduit entrance for 1 ½ inch rigid conduit. Auxiliary switches shall be insulated for 600 V, have contacts with a minimum continuous current rating of 10 amps, be readily adjusted without disassembly (either continuously or in not greater than 15 degree increments) from “circuit opening” to “circuit closing”, and have an interrupting capacity in an inductive circuit of at least 2 amps at 125 V dc and 20 amps at 120 Vac. The furnishing of 16 nonadjustable and two adjustable single-pole auxiliary switches is an acceptable equivalent to furnishing the 10 adjustable single-pole auxiliary switches described above.

v. Interlocks: A mechanical interlock, arranged so the main blades and grounding blades, mounted on the same switch base, cannot be closed at the same time, shall be provided. The mechanical interlock shall be of the type that is automatically positioned by the relative positions of the operating mechanisms. A chain type or cable type of mechanical interlock is not acceptable.

Key interlocks, when specified, shall be located on the vertical operating rods above the disconnecting couplings for any icebreaking handles and arranged so that the grounding blades on one switch and the main blades on a separately mounted switch cannot be closed at the same time. Key shall be removable in the open position only.

Key interlock systems (including the locks) are required to be provided for the switch & ground switch combinations. The interlocks shall be located on vertical operating rods above disconnecting couplings for any icebreaking handles and/or motor or worm gear operators and shall be arranged so that the grounding blades on one switch and the main blades on a separately mounted adjacent switch cannot be closed at the same time. Keys shall be removable only when the associated switch is in the open position.

1. The key codes used shall be documented in the final drawings and data submittals.

2. Key interlock locks are to be provided on all grounding switches and disconnecting/grounding switch combinations.

3. The key interlock locks for the ground blade mechanism and the specified adjacent disconnect switch shall be provided with the grounding switch, packaged and identified by key interlock grouping/keying.

4. The locks will be installed at the job site by WAPA’s construction/installation contractor onto the key interlock adapters.

5. Push on or Flip style dust covers shall be provided with each Key Interlock. The dust cover shall be designed to fit on the interlock regardless of the position of the key.

6. Key interlock adapters are to be provided on all switches.

vi. Supplemental Steel Members: The Contractor shall furnish supplemental steel members required to secure the switch-operating mechanism and the auxiliary switch to the switch support structure.

vii. Galvanizing: Exposed steel material required for the operating mechanisms and supplemental steel members required to secure the mechanisms to the support structures shall be galvanized according to ASTM A 123-2017.

viii. Operating Mechanism Bonding: A copper braid shall be furnished for bonding each switch operating shaft, handle, and mechanism to the switch support structure and to the Government-furnished switch-operating platform, according to paragraph 17.2 of IEEE Standard 80-2000 "IEEE Guide for Safety in AC Substation Grounding" and as shown on attached Western Area Power Administration drawing 31 1075 "Substation Standards - Switch Operating and Equipment Platforms - Electrical Design and Details".

ix. Insulators: All insulators shall be gray in color and in accordance with ANSI Standards C29 and/or NEMA publication No. HV1 for high-voltage insulators.

x. Porcelains: All porcelains shall be wet process, homogeneous, and free from cavities or other flaws. The glazing shall be uniform in color and free from blisters, burns, and other defects. The color of the porcelains shall be gray. Porcelain parts of each insulating column rated 450-kV BIL and above may be constructed of one piece or of multiple parts, provided the multiple parts are assembled by one of the following methods:

1. By flanged segments.

2. By placing suitable firing material in the joints between segments and the entire porcelain part fired in one piece.

3. By securely holding the parts together with a clamp device through the centerline of the porcelain.

4. By cementing or the joints. If the Contractor proposes to use this method, the Contractor shall submit for approval a complete description of the process and material used: bending test and dielectric test results on a completed joint; and results of aging tests on the joint showing mechanical strength and electrical strength.

xi. Terminal Connectors: The switches shall be furnished with NEMA Standard CC-1-2009, 2-hole or 4-hole terminal pads for 1200 – 2000 amp switches as shown by drawings. For 3000 amps and above, the switches shall have 3-sided pads with 4-hole NEMA on each side.

xii. Conduit and Conduit Fittings: Conduit and conduit fittings shall conform to NFPA 70 (NEC) and applicable UL and NEMA standards. Flexible conduit shall be liquid tight and sunlight resistant.

xiii. Spare Insulators: Spare insulators shall be the same as provided with the switches and furnished in the quantities listed with specific orders. For multi-section insulators the quantities listed are for a complete insulator, including all parts/components/hardware needed for a complete insulator.

xiv. Basic Spare Parts: Basic spare parts shall include one complete three phase set of each type of moving and stationary contacts

xv. Motor Operator Spare Parts: Motor operator spare parts shall include:

1. relays and contactors

2. auxiliary switch assemblies

3. local-remote switches

4. open, close, and stop switches

xvi. Support Structures: Support structures for the switches shall be furnished by switch supplier/manufacturer and shall comply with moderate/high seismic requirement of IEEE-693.

xvii. Wind Requirements: The disconnect switches shall be designed to meet or exceed the wind loads specified in the latest version of ASCE-7-10, using an importance factor of 1.15, Exposure C, and a minimum basic wind speed of 90 miles per hour.

xviii. Seismic Requirements: Seismic requirements will vary by order. Moderate and high seismic qualifications will be required under this contract. See section f below for further seismic requirements.

xix. Load and Line Switchers: All outdoor load and line switchers shall be designed, manufactured, assembled, and tested in accordance with the latest applicable ANSI, NEMA, IEEE, and ASTM standards and guidelines. If there are any conflicts between the ANSI, NEMA, IEEE, or ASTM standards and this specification the specification shall govern.

1. The load and line switcher shall be suitable for outdoor installation in electric power substations and on transmission line applications. The interrupters shall include all parts required for a complete installation including the interrupter unit(s), mounting brackets and hardware, auxiliary stationary and moving contacts and blade mounted pick-up arms to place the units into operation.

2. Temperature: The load and line switcher shall perform in an ambient temperature range of -50°C through +50°C.

3. Design Tests: The load and line switcher shall be design tested in accordance with IEEE Std. 1247-1998, Standard for Interrupter Switches for Alternating Current Rated Above 1,000 Volts. The testing shall include dielectric tests, power tests, an environmental test, and a mechanical endurance test. The dielectric tests shall include 60 Hz power frequency, lighting impulse withstand, and visual corona. The power tests shall demonstrate the capability to perform load breaking, line dropping, and loop splitting. The power tests and the dielectric tests shall be performed at full voltage on the complete interrupter assembly. Testing individual modules is not acceptable. The environmental test shall demonstrate the load and line switcher’s capability to perform over a temperature range of –40ºC to +50ºC. The load and line switcher shall be endurance tested to a 10,000 operations for vacuum interrupters and 2000 operations for SF6 interrupters.

4. Production Tests: Each load and line switcher shall be fully assembled at the factory, adjusted, tested, and timed per IEEE Std. 1247-2005. The tests shall include:

a. Mechanical Operations Test: There shall be at least 25 mechanical operations performed at the factory. Timing tests shall be recorded.

b. Current Path Resistance Test: A micro-ohm resistance check shall be performed on each interrupter using a 100 A DC source and the values shall be recorded.

c. Interrupter Dielectric Test: Each complete interrupter assembly shall pass a 60 Hz power frequency withstand test for one minute.

d. Test reports shall be provided with each interrupter.

5. Vacuum Interrupters:

a. Interrupter units shall be light weight in design, so as to preclude switch insulator deflection and resulting misalignment of switch contacts

b. Operating effort shall be minimal, suitable for manual swing handle or worm gear operation.

c. Interrupter units shall be capable of mounting or installation in any orientation including vertical (upright), horizontal (cantilever) and underhung.

d. Installation shall be simple with no field adjustment of the trip mechanism required

e. Interrupter shall provide a mechanism to test each vacuum bottle independently.

f. Interrupter shall not require special safety, disposal or reporting procedures; shall not pose a hazard to personnel or the environment; shall not emit greenhouse or toxic gases.

g. Interrupter shall be in the circuit only during the open operation of the disconnect switch; interrupter shall be out of the circuit but at potential when the disconnect switch is closed.

h. Interrupter design shall utilize proven vacuum bottle technology.

i. Interrupter design shall employ voltage grading to insure even distribution of voltage across all bottles.

j. Housing: The housing shall be a filament wound, fiber glass tube. The tube exterior shall be painted ANSI 70 gray and incorporate a proven UV inhibitor for long life. Housing to be properly sealed to prevent loss of dielectric or ingress of moisture.

6. SF6 Interrupters:

a. The load and line switcher shall use SF6 single gap puffer interrupters. Multigap SF6 interrupters are unacceptable. Each interrupter shall be housed in an ANSI 70 gray composite or epoxy insulator that will not degrade when exposed to the sun’s UV rays. Fiberglass housed interrupters without silicone outer coatings and porcelain housed interrupters are unacceptable.

b. SF6 Gas System: The gas system shall include the insulator and a color-coded, temperature compensated density gauge that is visible from the ground. A means for refilling the system in the field without disassembling the interrupter must be provided. The device shall have a leak rate of less than 0.5% per year.

c. Operating Mechanism: Each interrupter shall be provided with a spring open mechanism and shall reset itself when the switch is in the open position.

d. interrupter assembly. Testing individual modules is not acceptable. The environmental test shall demonstrate the load and line switcher’s capability to perform over a temperature range of –40ºC to +50ºC. The load and line switcher shall be endurance tested to 2000 operations.

7. Warranty: All load and line switchers and their accessories furnished under this specification shall be covered by a five-year warranty from date of shipment against failure due to design or to defects in workmanship or material.

c. TESTS: Tests listed below shall be performed at the factory or other facilities available to the manufacturer.

i. Design Tests: The basic design of the switch furnished shall have met the requirement of this Subdivision in tests previously performed, or the Contractor shall perform the tests specified in this Subdivision for the switch. If identical switches have been previously tested as below, the Contractor may omit tests and furnish certified copies of reports of results of such previous tests. Design tests on switches identical to those being furnished under these specifications will be accepted. Ice testing will also be accepted on a higher-voltage-rated switch, provided the switch tested is the same in all the following respects as the switch being furnished:

Clip and hinge end mechanism Blade material and cross section Motor operator

1. Mechanical Design Life Test: The basic mechanical design of the switch and operating mechanism being furnished shall be proved by not less than 1,000 close-open operations at the factory, at recommended contact speeds. These operations shall be performed on a completely assembled 3-pole switch with recommended spring and contact adjustments. At the successful completion of this design test, the switch shall be capable of being brought within optimum mechanical adjustment and shall be in satisfactory mechanical condition without replacement of component parts. These tests shall be performed on an identical separate test switch for which certified test reports will be acceptable. Such tests shall not be performed on an actual switch to be furnished to the Government under this or any other contract.

Certified test reports shall be furnished which shall show that the operations were accomplished without failure of any component part and without mechanical difficulties. Refer to Table E and subparagraph II.b.i for submittal requirements.

2. Temperature Rise Test: Temperature rise test in accordance with IEEE C37.30.1-2011, section 8.2. The temperature rise test report shall include a diagram indicating the points on the switch where the temperatures are determined and the composition of the switch material, including type of plating on contact surfaces at these points.

3. Ice Breaking Test: Ice testing in accordance with IEEE C37.30.1-2011, section 8.5, and with a minimum ice thickness as specified in Tables A-D. The test on these single-pole mechanisms shall be a single-pole test and shall be performed on a complete assembled single-pole. The switch under test shall be mounted horizontally upright. Inter-phase connections and connections between the group-operated switch and manual handle or power unit may be shortened to suit conditions. A switch equipped with stacked insulators may be tested with only one unit per stack except switches with ground blades shall be tested with full stacks. The switch shall be tested with the same type operating mechanism and with the use of the same type handle, gear, power unit, etc. as furnished under the contract. Hammering on the blades, operating mechanism, or pipe is not permitted during any part of this test.

ii. Production Tests: The switches shall be subjected to and pass the manufacturer’s standard production tests, which shall include:

1. Dielectric Test: The completely assembled control circuit shall be given a dielectric test in accordance with Industrial Control and Systems, NEMA publication No. ICS 1-109.20.

d. Support Structures: Steel support structures shall be supplied by the switch manufacturer for each disconnecting switch, as indicated in the bidding/pricing schedule per order. Refer also to the Seismic Requirements. Supporting structures shall be furnished as required to meet NESC Clearances for Overhead Conductors To Ground Surface for Qualified Personnel requirements. In no cases should clearances from top of foundation to bottom of switch support base be less than 8’- 6". All supporting structures shall be galvanized according to the most current version of ASTM A 123.

Embedded anchor bolts will be furnished by WAPA, but the required number, size, location, and material strength shall be established by the switch manufacturer in the seismic report and seismic outline drawing. Refer to III.b.i. – Informational and Installation Drawings and Data for the seismic report submittal requirements.

e. Support Structure Grounding: Prior to galvanizing, grounding pads shall be provided 2 feet above the top of the base plate on all columns /legs of the support structures. Two holes shall be drilled and tapped in the pads for 1/2-inch diameter bolts (13-UNC threading). The holes shall be spaced 1.75-inches center to center and vertically aligned in the center of the plates (NEMA spacing). Grounding pads shall be in accordance with NEMA CC1.

Refer to Attachment C drawing 31 1075 “Substation Standards - Switch Operating and Equipment Platforms - Electrical Design and Details" for additional grounding pad locations.

f. Seismic Requirements for disconnect switches, grounding air switch, and disconnect/grounding switch combinations and associated support structures:

i. The 15-kV through 245-kV disconnect switches, grounding air switch, and disconnect/grounding switch combinations and associated support structures shall be qualified for installation and operation at the moderate/high seismic level per IEEE Standard 693. The qualification for these disconnect switches, grounding air switch, and disconnect/grounding switch combinations for this solicitation shall include the following:

1. Test report and any applicable associated supplemental report(s).

2. Identification of all components of the proposed/offered equipment that are not identical to qualified equipment, along with analysis and discussion why the proposed/offered equipment meets IEEE 693 load, strength, and operational requirements with the differing components, including the specified various support structure/terminal heights.

ii. The descriptive literature documents shall include a copy of the existing seismic qualifications reports and associated seismic outline drawing(s) for the disconnect switches, grounding air switches, and disconnect/ground switch combinations and a description of how the previously qualified switches will be qualified for this specific solicitation.

iii. The post-award submittal(s) shall be submitted for review and acceptance per the schedule in Table E. After receipt and acceptance of the post-award seismic report submittal(s) for the items including the required seismic outline drawings for the actual switches & supports for this contract, the Government will design the reinforced concrete foundations and provide the anchor bolts to the (separate) installation/construction contractor. Any changes (after receipt of the seismic report) that impact design and construction of the foundations or anchor bolts will be paid by the switch Contractor (this contract).

WAPA’s installation/construction contractor(s) will provide the foundations.

The seismic identification plates shall be provided for each switch according to IEEE 693, and each plate’s drawing included as a separate drawing or as a detail on another drawing.

II. Electrical Drawings and Data to be Furnished by the Contractor

a. General:

i. Drawings and technical data required to be furnished by the Contractor shall be in…