HomeMy WebLinkAbout170870 S AND C ELECTRIC PETERSON CO - PURCHASE ORDER - 7700348Date: 01 /16/07
City of Fort Collins
Page Number: 1
City of Fort Collins
Purchase Order Number: 7700348
ueuvery uate: U4/ZU/U7 Buyer: DICK,OPAL
Purchase Order number must appear on invoices, packing lists, labels, bills of lading, and all correspondence.
Note:
Line Qty
1 8
UOM Description
EA 67598012; SWITCH
PADMOUNT:4WAY
67598012
YARD
SWITCH, PADMOUNT, SF6 INSULATED, 3 PHASE, 15KV,
95KV BIL, 12.5KA INTERRUPTING RATING, TWO 600A
SWITCHED WAYS & TWO 600A VACUUM INTERRUPTER
PROTECTED TAPS, INTEGRAL GROUNDS, FIELD
SELECTABLE SINGLE OR THREE PHASE ELECTRONIC TRIP,
600A ANSUIEEE 386 SOURCE AND TAP BUSHINGS
PER SPEC 367-303, DATED 9/23/99;
Total
Unit Price Extended Price
29,478.000
235,824.00
$235,824.00
City of Fort Ili s Director of Purchasing and Risk Management City of Fort Collins
This order is valid over $2000 unless signed by James B. O'Neill II, CPPO, FNIGP Accounting Department
City of Fort Collins Purchasing, PO Box 580, Fort Collins, CO 80522-0580 PO Box 580
Fort Collins, CO 80522-0580
REV. SYM. A
3.02 Fault Interrupters
(a) Fault interrupters shall have a ten -time duty -cycle fault -closing and fault interrupting rating
equal to or exceeding the short-circuit rating of the switchgear. This rating defines the fault
interrupter's ability to close ten times against a three-phase fault with asymmetrical (peak)
current in at least one phase equal to the rated value and clear the resulting fault current,
with the interrupter remaining operable and able to carry and interrupt rated current.
Certified test abstracts establishing such ratings shall be furnished.
(b) The fault interrupter shall be provided with a disconnect with an integral ground position
that is readily visible through the viewing window to eliminate the need for cable handling
and exposure to high voltage to ground the equipment.
(c) The ground position shall have a ten -time duty -cycle fault -closing rating.
(d) The disconnect shall be provided with an open position that is readily visible through the
viewing window to eliminate the need for cable handling and exposure to high voltage to
establish a visible gap.
(e) The open gaps of the disconnect shall be sized to allow cable testing through a feedthru
bushing or the back of the elbow.
(f) An internal indicator shall be provided for each fault interrupter to show when it is in the
tripped condition. The indicator shall be clearly visible through the viewing window.
3.03 Operating Mechanisms
(a) Load -interrupter switches and fault interrupters shall be operated by means of a quick -
make, quick -break mechanism.
(b) The manual handle shall charge the operating mechanism for opening, closing, and
grounding of the switches and fault interrupters.
(c) Operating mechanisms shall be equipped with an operation selector to prevent inadvertent
operation from the closed position directly to the grounded position, or from the grounded
position directly to the closed position. The operation selector shall require physical
movement to the proper position to permit the next operation.
(d) Operating shafts shall be padlockable in any position to prevent operation.
(e) The operation selector shall be padlockable to prevent operation to the grounded position.
(f) The operating mechanism shall indicate switch position, which shall be clearly visible from
the normal operating position.
8
367-303
REV. SYM. A
3.04 Overcurrent Control
(a) A microprocessor -based overcurrent control shall be provided to initiate fault interruption.
(b) The control shall function correctly at temperatures of - 40°C to + 80°C.
(c) The control shall be capable of single -pole or three -pole tripping of each fault interrupter.
(d) Control settings shall be field programmable using a personal computer connected via a
data port to the control. Manual electronic tripping shall also be possible using a personal
computer. The data port shall be accessible from the exterior of the enclosure.
(e) The control shall be mounted in a watertight enclosure and shall be removable in the field
without taking the gear out of service.
(f) Power and sensing for the control shall be supplied by integral current transformers.
(g) The minimum total clearing time (from initiation of the fault to total clearing) for fault
interruption shall be 40 milliseconds (2.4 cycles) at 60 hertz or 44 milliseconds (2.2 cycles)
at 50 hertz.
(h) The control shall feature time -current characteristic (TCC) curves including standard E-
speed, coordinating -speed tap, and coordinating -speed main curves. Coordinating -speed tap
curves shall optimize coordination with load -side weak-link/backup current -limiting fuse
combinations, and coordinating -speed main curves shall optimize coordination with tap -
interrupter curves.
(i) The standard E-speed curve shall have phase-overcurrent settings ranging from 25E
through 200E. The coordinating -speed tap curve shall have phase-overcurrent and
independent ground-overcurrent settings ranging from 50 amperes through 400 amperes.
The coordinating -speed main curve shall have phase-overcurrent and independent ground-
overcurrent settings ranging from 100 amperes through 800 amperes.
(j) The control shall have instantaneous -trip (1 kA through 8 kA) and definite -time delay
(32 ms through 96 ms) settings to allow tailoring of the coordinating -speed tap and
coordinating -speed main curves to the application.
3.05 Voltage indication with provisions for low -voltage phasing
(a) Voltage indication with provisions for low -voltage phasing for each load -
interrupter switch and fault interrupter by means of capacitive taps on the bushings
shall be provided to eliminate the need for cable handling and exposure to high
voltage to test the cables for voltage and phasing. This feature shall include a
flashing LCD display to indicate the presence of voltage for each phase, and a solar
panel to supply power for testing of the complete voltage -indication circuit and
phasing circuit.
(b) The voltage -indication feature shall be mounted on the covers for the viewing
windows on the opposite side of the gear from the bushings and bushing wells so
that operating personnel shall not be required to perform any routine operations in
close proximity to high -voltage elbows and cables.
9
367-303
REV. SYM. A
IV. Switchgear Style
4.01 Pad -Mounted Style
(a) The gas -tight tank shall be made of 7-gauge minimum mild -steel.
(b) Enclosure
(1) The switchgear shall be provided with a tamper resistant weatherproof pad -
mounted enclosure suitable for installation of the gear on a concrete pad.
(2) The pad -mounted enclosure shall be separable from the switchgear to allow clear
access to the bushings and bushing wells for cable termination.
(3) The basic material shall be 14-gauge minimum hot -rolled, pickled, and oiled steel
sheet.
(4) The enclosure shall be provided with removable front and back panels, and hinged
lift -up roof sections for access to the operating and termination compartments.
Each roof section shall have a retainer to hold it in the open position. Hinge pins
shall be stainless steel.
(5) Lift -up roof sections shall overlap the panels and shall have pentahead bolts and
provisions for padlocking that incorporate a means to protect the padlock shackle
from tampering.
(6) The base shall consist of continuous 90-degree flanges, turned inward and welded
at the corners, for bolting to the concrete pad.
(7) Panel openings shall have 90-degree flanges, facing outward, that shall provide
strength and rigidity as well as deep overlapping between panels and panel
openings to guard against water entry.
(8) For bushings rated 600 amperes continuous, the termination compartment shall be
of an adequate depth to accommodate 200 ampere loadbreak elbows or
encapsulated surge arresters mounted on 600-ampere elbows having 200-ampere
interfaces.
(9) An instruction manual holder shall be provided.
(10) Non -removable lifting tabs shall be provided.
10
367-303
REV. SYM. A
(c) Enclosure Finish
(1) All exterior welded seams shall be filled and sanded smooth for neat appearance.
(2) To remove oils and dirt, to form a chemically and anodically neutral conversion
coating to improve the finish -to -metal bond, and to retard underfilm propagation of
corrosion, all surfaces shall undergo a thorough pretreatment process comprised of
a fully automated system of cleaning, rinsing, phosphatizing, sealing, drying, and
cooling, before any protective coatings are applied. By utilizing an automated
pretreatment process, the enclosure shall receive a highly consistent thorough
treatment, eliminating fluctuations in reaction time, reaction temperature, and
chemical concentrations.
(3) After pretreatment, protective coatings shall be applied that shall help resist
corrosion and protect the steel enclosure. To establish the capability to resist
corrosion and protect the enclosure, representative test specimens coated by the
manufacturer's finishing system shall satisfactorily pass the following tests:
(i) 4000 hours of exposure to salt -spray testing per ASTM B 117 with:
(a) Underfilm corrosion not to extend more than 1/32" from the
scribe as evaluated per ASTM D 1645, Procedure A, Method 2
(scraping); and
(b) Loss of adhesion from bare metal not to extend more than 1/8"
from the scribe.
(ii) 1000 hours of humidity testing per ASTM D 4585 using the Cleveland
Condensing Type Humidity Cabinet with no blistering as evaluated per
ASTM D 714.
(iii) 500 hours of accelerated weathering testing per ASTM G 53 using lamp
UVB-313 with no chalking as evaluated per ASTM D 659, and no more
than 10% reduction of gloss as evaluated per ASTM D 523.
(iv) Crosshatch adhesion testing per ASTM D 3359 Method B with no loss of
finish.
(v) 160-inch-pound impact adhesion testing per ASTM D 2794 with no
chipping or cracking.
(vi) Oil resistance testing consisting of a 72-hour immersion bath in mineral oil
with no shift in color, no streaking, no blistering, and no loss of hardness.
(vii) 3000 cycles of abrasion testing per ASTM 4060 with no penetration to the
substrate.
Certified test abstracts substantiating the above capabilities shall be furnished upon
request.
(4) The finish shall be inspected for scuffs and scratches. Blemishes shall be touched
up by hand to restore the protective integrity of the finish.
(5) The finish shall be olive green, Munsell 7GY3.29/1.5.
11
367-303
REV. SYM. A
V. Labeling
5.01 Hazard -Alerting Signs
(a) The exterior of the pad -mounted enclosure (if furnished) shall be provided with
"Warning —Keep Out —Hazardous Voltage Inside --Can Shock, Burn, or Cause Death"
signs.
(b) Each unit of switchgear shall be provided with a "Danger —Hazardous Voltage —Failure to
Follow These Instructions Will Likely Cause Shock, Burns, or Death" sign. The text shall
further indicate that operating personnel must know and obey the employer's work rules,
know the hazards involved, and use proper protective equipment and tools to work on this
equipment.
(c) Each unit of switchgear shall be provided with a "Danger —Keep Away —Hazardous
Voltage —Will Shock, Bum, or Cause Death" sign.
5.02 Nameplates, Ratings Labels, and Connection Diagrams
(a) Each unit of switchgear shall be provided with a nameplate indicating the manufacturer's
name, catalog number, model number, date of manufacture, and serial number.
(b) Each unit of switchgear shall be provided with a ratings label indicating the following:
voltage rating; main bus continuous rating; short-circuit rating; fault -interrupter ratings
including interrupting and duty -cycle fault -closing; and load -interrupter switch ratings
including duty -cycle fault -closing and short -time.
(c) The pad -mounted enclosure (if furnished) shall be provided with a connection diagram
showing load -interrupter switches, fault interrupters with integral disconnects, and bus
along with the manufacturer's model number.
VI. Accessories
6.01 Adapter Cable
An adapter cable for connecting an overcurrent control to a user -furnished personal computer
(having a 25-pin or 9-pin serial communication port) in the field shall be provided.
6.02 Software
Software necessary for programming the microprocessor -based overcurrent control shall be
provided.
VII. Factory Production Tests
7.01 The bulk SF6 gas supply and each individual switch shall be tested for moisture content.
Each individual switch shall undergo a mechanical operation check and a leak test. The
switch shall be factory filled with SF6 gas and AC hi -pot tested one minute phase -to -phase,
phase -to -ground and across the open contacts. Circuit resistance shall be checked on all
ways. Each vacuum interrupter shall be trip tested by injecting AC current through the
switch.
12
367-303
REV. SYM. A
APPENDIX A
Approved Manufactures
Switches purchased under this specification shall be of the make shown below.
Manufacturers not listed below may submit written proposals demonstrating compliance
with these specifications for consideration of addition to the approved manufacturer list
prior to the next request for bids. Inclusion on the list below does necessarily guarantee
product approval. All products provided by an approved manufacturer must still fully satisfy
all requirements of this specification to be acceptable.
Manufacturer
Catalog Number
S&C Electric Company
934222-L2M3OP4T0-S 179
c/o Peterson Company
4949 Colorado Blvd.
Denver, CO 80216
13
367-303
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"^'o n MODEL 422
PETERSON COMPANY
10700 West 50t" Avenue Phone: (303) 388-6322
Wheat Ridge, CO.80033 FAX: (303) 399-0033
TO: City of Fort Collins
ATTN: Ms. Opal Dick
SUBJECT: S&C Electric Co. Pricing
COPY: bal \
FAX NO.:
DATE: 1 /8/07
FROM: Chris J. Collins
PAGES: 1/1
ITEM
JQTY.
TALOG NUMBER / DESCRIPTION
PRICE
DELIVERY
NO.
EACH
1 8 934222-L2WOP4- 179
15kV Model 422 Man al Vista®
with special features to et Ft. S
no. 367-303.
$31,062.00
specification
Shipment of this equipment wilAe approximately 16-18 weeks af* receipt of order.
Terms of Payment. 1/2 of /o 10 days, Net 30 days
FOB: Chicago, IL. - co on carrier freight prepaid and allowed on order over
$2,000.00 net.
This quotation is vali for 30 days from date of quotation.
S&C Standard Terms and Conditions of Sale per Price Sheet 150 shall apply.
CITY OF FORT COLLINS
LIGHT AND POWER DEPARTMENT
P.O. BOX 580
FORT COLLINS, CO 80521
SPECIFICATION NO: 367-303
REV. A
TITLE: THREE PHASE DEADFRONT PAD -MOUNTED
SF6 INSULATED SWITCHGEAR WITH TWO
SWITCHED WAYS AND TWO VACUUM
INTERRUPTER PROTECTED TAPS
APPROVED BY:
Tim M. Sagen
Standards Engineering Manager
DATE: 9/23/99
REVISED: 10/22/99
REV. SYM. A
REVISION DESCRIPTION
REVISION DESCRIPTION (Previous Revision Descriptions on File)
CHANGE
APPROVED
NOTICE
REVISION A:
Tim M. Sagen
• Paragraph 1.02: Revised to clarify that the load interrupter/grounding
10/22/99
switches associated with the vacuum interrupter tapped ways shall be
configured for single -pole operation.
• Paragraph 7.01: New paragraph defining testing requirements.
1
367-303
REV. SYM. A
TABLE OF CONTENTS
REVISION DESCRIPTION................................................................................................................ 1
1. General.........................................................................................................................................3
1.01
General Description.............................................................................................................
3
1.02
Switch Configuration...........................................................................................................
3
1.03
Ratings.................................................................................................................................
4
1.04
Certification of Ratings.......................................................................................................
4
1.05
Compliance with Standards and Codes...............................................................................
4
1.06
Approved Manufacturers.....................................................................................................
5
11. Construction.................................................................................................................................5
2.01
S176 -Gas Insulation..............................................................................................................
5
2.02
Gas -Tight Tank....................................................................................................................
5
2.03
Gas -Tight Tank Finish.........................................................................................................
6
2.04
Viewing Windows...............................................................................................................6
2.05
High -Voltage Bus................................................................................................................6
2.06
Provisions for Grounding....................................................................................................
7
2.07
Terminations........................................................................................................................7
2.08
Bushings and Bushing Wells...............................................................................................
7
I11. Basic Components.......................................................................................................................
7
3.01
Load -Interrupter Switches...................................................................................................
7
3.02
Fault Interrupters.................................................................................................................
8
3.03
Operating Mechanisms........................................................................................................
8
3.05
Voltage indication with provisions for low -voltage phasing ...............................................
9
IV. Switchgear Style........................................................................................................................
10
4.01
Pad -Mounted Style............................................................................................................
10
V. Labeling.....................................................................................................................................12
5.01
Hazard -Alerting Signs.......................................................................................................
12
5.02
Nameplates, Ratings Labels, and Connection Diagrams ...................................................
12
VI. Accessories................................................................................................................................
12
6.01
Adapter Cable....................................................................................................................
12
6.02
Software.............................................................................................................................12
VII.
Factory Production Tests.......................................................................................................
12
APPENDIXA....................................................................................................................................
13
2
367-303
REV. SYM. A
General
1.01 General Description
The switchgear shall conform to this specification and shall consist of a gas -tight tank containing
SF6 gas, load -interrupter switches and resettable vacuum fault interrupters with visible open gaps
and integral visible grounds, and a microprocessor -based overcurrent control. Construction shall be
deadfront. Load -interrupter switch terminals and fault -interrupter terminals shall be equipped with
600 amp ANSI/IEEE 386 bushings to interface with conventional elbow style connectors. Manual
operating mechanisms and viewing windows shall be located on the opposite side of the tank from
the bushings and bushing wells so that operating personnel will not be required to perform any
routine operations in close proximity to high -voltage elbows and cables. Switch shall be shipped
factory filled with SF6 gas conforming to ASTM D2472.
1.02 Switch Configuration
Each switch shall be in accordance with Figure 1 and shall have two three -pole, three phase
load/grounding switch ways and two vacuum interrupter tapped ways with field selectable single or
three phase electronic trip. The load interrupter/grounding switches associated with the vacuum
interrupter tapped ways shall be configured for single -pole resetting of all interrupter ways.
Figure 1. One -line Diagram
3
367-303
REV. SYM. A
1.03 Ratings
The ratings for the integrated switchgear shall be as designated below.
Frequency, Hz............................................................................................... 60
W, Maximum.............................................................................................15.5
W, BIL..........................................................................................................95
Main Bus Continuous, Amperes................................................................. 600
Three -Pole Load -Interrupter Switches
Continuous, Amperes..............................................................................600
Load Dropping, Amperes........................................................................600
Ten -Time Duty -Cycle Fault -Closing,
Amperes RMS Symmetrical.............................................................. 12,500
Amperes, Peak................................................................................... 32,500
Fault Interrupters
Continuous, Amperes..............................................................................600
Load Dropping, Amperes....................................................................... 600
Ten -Time Duty -Cycle Fault Interrupting,
Amperes RMS Symmetrical.............................................................. 12,500
Ten -Time Duty -Cycle Fault -Closing,
Amperes RMS Symmetrical...............................................................12,500
Amperes, Peak....................................................................................32,500
Short -Circuit Rating
Amperes, RMS Symmetrical............................................................. 12,500
1.04 Certification of Ratings
(a) The manufacturer of the switchgear shall be completely and solely responsible for the
performance of the load -interrupter switch and fault interrupter as well as the complete
integrated assembly as rated.
(b) The manufacturer shall furnish certification of ratings of the load -interrupter switch, fault
interrupter, and the integrated switchgear assembly consisting of switches and fault
interrupters in combination with the gas -tight tank.
1.05 Compliance with Standards and Codes
The switchgear shall conform to or exceed the applicable requirements of the following standards
and codes:
(a) The applicable portions of ANSI C57.12.28, covering enclosure integrity for pad -mounted
equipment.
(b) The applicable portions of ANSI C37.71, ANSI C37.72, ANSI C37.73, IEC 56, and
IEC 265-1 (Class A), which specify test procedures and sequences for the load -interrupter
switches, fault interrupters, and the complete switchgear assembly.
4
367-303
REV. SYM. A
1.06 Approved Manufacturers
Switches purchased under this specification shall be of the manufacturers listed in Appendix A.
Only direct bids from approved manufacturers will be accepted. Manufacturers not listed may
submit written proposals demonstrating compliance with these specifications for consideration of
addition to the accepted manufacturer list prior to the next request for bids. In addition to inclusion
on the list in Appendix A, manufacturer's equipment must satisfy all requirements of this
specification to be acceptable.
II. Construction
2.01 SF6-Gas Insulation
(a) The S176 gas shall conform to ASTM D2472.
(b) The switchgear shall be filled with S176 gas to a pressure of 7 psig at 68° F.
(c) The gas -tight tank shall be evacuated prior to filling with SF6 gas to minimize moisture in
the tank.
(d) The switchgear shall withstand system voltage at a gas pressure of 0 psig at 68' F.
(e) A gas -fill valve shall be provided.
(f) A temperature -compensated pressure gauge shall be provided that is color coded to show
the operating range. The gauge shall be mounted inside the gas -tight tank (visible through a
large viewing window) to provide consistent pressure readings regardless of the altitude at
the installation site.
2.02 Gas -Tight Tank
(a) The tank shall be submersible and shall be capable of withstanding a minimum of 15 psig
internal pressure, 14 psig external pressure and 10 feet of water over the base.
(b) The tank shall be of welded construction and shall be made of 7-gauge mild steel.
(c) A means of lifting the tank shall be provided.
5
367-303
REV. SYM. A
2.03 Gas -Tight Tank Finish
(a) To remove oils and dirt, to form a chemically and anodically neutral conversion coating to
improve the finish -to -metal bond, and to retard underfilm propagation of corrosion, mild -
steel surfaces shall undergo a thorough pretreatment process comprised of a fully
automated system of cleaning, rinsing, phosphatizing, sealing, drying, and cooling, before
any protective coatings are applied. By utilizing an automated pretreatment process, the
mild -steel surfaces of the gas -tight tank shall receive a highly consistent thorough
treatment, eliminating fluctuations in reaction time, reaction temperature, and chemical
concentrations.
(b) After pretreatment, protective coatings shall be applied that shall help resist corrosion and
protect the mild -steel surfaces of the gas -tight tank. To establish the capability to resist
corrosion and protect the mild steel, representative test specimens coated by the
manufacturer's finishing system shall satisfactorily pass the following tests:
(1) 1500 hours of exposure to salt -spray testing per ASTM B 117 with:
(i) Underfilm corrosion not to extend more than 1/32" from the scribe as
evaluated per ASTM D 1645, Procedure A, Method 2 (scraping); and
(ii) Loss of adhesion from bare metal not to extend more than 1/8" from the
scribe.
(2) 1000 hours of humidity testing per ASTM D 4585 using the Cleveland Condensing
Type Humidity Cabinet with no blistering as evaluated per ASTM D 714.
(3) Crosshatch adhesion testing per ASTM D 3359 Method B with no loss of finish.
Certified test abstracts substantiating the above capabilities shall be furnished upon request.
(c) The finish shall be inspected for scuffs and scratches. Blemishes shall be touched up by
hand to restore the protective integrity of the finish.
(d) The finish shall be indoor light gray, satisfying the requirements of ANSI Standard Z55.1
for No. 61.
2.04 Viewing Windows
(a) Each load -interrupter switch shall be provided with a large viewing window at least
6 inches by 12 inches to allow visual verification of the switch -blade position (open,
closed, and grounded) while shining a flashlight on the blades.
(b) Each fault interrupter shall be provided with a large viewing window at least 6 inches by 12
inches to allow visual verification of the disconnect -blade position (open, closed, and
grounded) while shining a flashlight on the blades.
(c) Viewing windows shall be located on the opposite side of the gear from the bushings and
bushing wells so that operating personnel shall not be required to perform any routine
operations in close proximity to high -voltage elbows and cables.
(d) A cover shall be provided for each viewing window to prevent operating personnel from
viewing the flash which may occur during switching operations.
2.05 High -Voltage Bus
6
367-303
REV. SYM. A
(a) Bus and interconnections shall withstand the stresses associated with short-circuit currents
up through the maximum rating of the switchgear.
(b) Before installation of bus, all electrical contact surfaces shall first be prepared by machine
abrading to remove any oxide film. Immediately after this operation, the electrical contact
surfaces shall be coated with a uniform coating of an oxide inhibitor and sealant.
2.06 Provisions for Grounding
(a) One '/z-13 ground -connection per way plus one %2-13 tank ground shall be provided on the
gas -tight tank of the switchgear.
(b) The ground shall be constructed of stainless steel and welded to the gas -tight tank, and
shall have a short-circuit rating equal to that of the switchgear.
2.07 Terminations
(a) Terminals for load -interrupter switches shall have 600-ampere bushings.
(b) Terminals for fault interrupters shall be equipped with 600-ampere bushings.
(c) Bushings rated 600 amperes continuous shall be provided with a threaded stud.
(d) Bushings shall be located on one side of the gear to reduce the required operating
clearance.
2.08 Bushings and Bushing Wells
(a) Bushings and bushing wells shall conform to ANSUIEEE Standard 386 (ANSI Standard
C 119.2).
(b) Bushings and bushing wells shall include a semiconductive coating.
(c) Bushings and bushing wells shall be mounted in such a way that the semiconductive
coating is solidly grounded to the gas -tight tank.
III. Basic Components
3.01 Load -Interrupter Switches
(a) The three-phase, gang -operated load -interrupter switches shall have a ten -time duty -cycle
fault -closing rating equal to or exceeding the short-circuit rating of the switchgear. This
rating defines the ability to close the switch ten times against a three-phase fault with
asymmetrical (peak) current in at least one phase equal to the rated value, with the switch
remaining operable and able to carry and interrupt rated current. Certified test abstracts
establishing such ratings shall be furnished upon request.
(b) The switch shall be provided with an integral ground position that is readily visible through
the viewing window to eliminate the need for cable handling and exposure to high voltage
to ground the equipment.
(c) The ground position shall have a ten -time duty -cycle fault -closing rating.
(d) The switch shall be provided with an open position that is readily visible through the
viewing window to eliminate the need for cable handling and exposure to high voltage to
establish a visible gap.
(e) The open gaps of the switch shall be sized to allow cable testing through a feedthru bushing
or the back of the elbow.
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