E1 a0011501 se0d3-ed20000 technical specification switchgear 2400vac

REV FECHA DESCRIPCIÓN ELABORADO
POR
REVISADO
POR
APROBADO
POR
FIRMA DE
APROBACIÓN
C JUN-2015 EMISIÓN PARA
COMENTARIOS
GII-EL
R. MONTES R. MONTES M. MÚJICA
Gerencia Servicios Técnicos y Apoyo
Superintendencia FEL y Apoyo Técnico E1A0011501-SE0D3-ED20000
MODERNIZACIÓN DE TABLEROS PRINCIPALES
EN 4 SUBESTACIONES ELECTRICAS DEL CRP
2015-984PCA01
TECHNICAL SPECIFICATION FOR METAL-CLAD
POWER SWITCHGEAR 2400 VAC EBAS-1
ELECTRICAL

TECHNICAL SPECIFICATION FOR METAL-CLAD POWER
SWITCHGEAR 2400 VAC EBAS-1
ELECTRICITY DISCIPLINE
Gerencia Servicios Técnicos y Apoyo Revisión C Página
Superintendencia FEL y Apoyo Técnico E1A0011501-SE0D3-ED20000 Fecha Jun.15 2 de 32
CONTENIDO
ATTACHMENT Nº 1: One - Line Diagram ......................................................................... 3
ATTACHMENT Nº 2: 2,4 kV Switchgear Data Sheet ........................................................ 3
ATTACHMENT Nº 3: Electrical Equipment Plot Plan ...................................................... 3
1. PURPOSE................................................................................................................... 4
2. SCOPE........................................................................................................................ 4
3. DEFINITIONS.............................................................................................................. 4
4. REFERENCE DOCUMENTS AND DRAWINGS......................................................... 5
5. STANDARDS AND CODES........................................................................................ 5
6. ELECTRICAL SYSTEM CHARACTERISTICS........................................................... 6
7. ELECTRICAL SYSTEM .............................................................................................. 7
8. ENVIRONMENTAL CONDITIONS.............................................................................. 7
9. TECHNICAL REQUIREMENTS .................................................................................. 8
9.1. General ....................................................................................................................... 9
9.2. Mechanical Requirements ........................................................................................ 9
9.2.1. Enclosure............................................................................................................. 9
9.2.2. Base and Support ............................................................................................. 10
9.2.3. Access to Cells.................................................................................................. 10
9.2.4. Access Doors .................................................................................................... 10
9.2.5. Safety ................................................................................................................. 11
9.2.6. Thermal Behaviour............................................................................................ 11
9.2.7. Vertical Sections ............................................................................................... 12
9.2.8. Space Heaters, Outlets and Lighting............................................................... 12
9.2.9. Buses and Connections ................................................................................... 13
9.2.10. Horizontal Distribution Buses.......................................................................... 13
9.2.11. Vertical Distribution Buses .............................................................................. 14
9.2.12. Ground Bus ....................................................................................................... 14
9.3. Medium Voltage Power Circuit Breakers............................................................... 14

9.4. Insulation.................................................................................................................. 16
9.5. Potential Transformers ........................................................................................... 16
9.6. Current Transformers.............................................................................................. 17
9.7. Medium Voltage Starters......................................................................................... 17
9.8. Nameplates .............................................................................................................. 18
9.9. Control Wiring.......................................................................................................... 19
9.10.Instruments, Meters and Relays............................................................................. 20
9.11.Interlocks.................................................................................................................. 21
10. FINISH....................................................................................................................... 21
11. TESTS....................................................................................................................... 22
11.1.Design Tests ............................................................................................................ 22
11.2.Production Tests ..................................................................................................... 22
12. DOCUMENTATION................................................................................................... 23
12.1.Documentation Content.......................................................................................... 23
12.2.SELLER Drawings and Data Requirements .......................................................... 23
12.2.1. Bidder Documentation...................................................................................... 23
12.2.2. Documents before Manufacturing. .................................................................. 24
13. SHIPMENT................................................................................................................ 25
14. WARRANTY.............................................................................................................. 26
ATTACHMENT Nº 1: One - Line Diagram
ATTACHMENT Nº 2: 2,4 kV Switchgear Data Sheet
ATTACHMENT Nº 3: Electrical Equipment Plot Plan

1. PURPOSE
This document is intended to set the technical requirements for the purchase of
one (1) Medium Voltage Metal-Clad Power Switchgear, to be installed at the
Electrical Substation 8 (S/S-#8) as part of the project “MODERNIZACIÓN DE
TABLEROS PRINCIPALES EN 4 SUBESTACIONES ELÉCTRICAS DEL CRP”,
located in AMUAY Refinery at CRP (Centro de Refinación Paraguaná).
2. SCOPE
This specification establishes the technical requirements for the design,
fabrication, tests, supply, shipping to COMPANY warehouses and technical
assistance during installation of:
• One (1) Medium Voltage Switchgear 2,4 kV, 2.000A, 3Ø, 60 Hz, 31.5
kAsym.
It is considered as part of the supply all auxiliary components and accessories
needed for its correct installation and operation.
The Switchgear shall be manufactured per these General Technical
Specifications and the pertinent Data Sheet. In the event of discrepancy between
them, the Data Sheet shall prevail.
3. DEFINITIONS
Throughout this document, the following definitions shall apply:
COMPANY: PDVSA. CRP
BIDDER: Company that presents a bid
SELLER: Bidder granted with the equipment supply
INSPECTOR: Technical representative designated by the
COMPANY to inspect all equipments to be
supplied.
FAT: Factory Acceptance Test.
MANUFACTURER: The party responsible for manufacturing the

required equipment or components
4. REFERENCE DOCUMENTS AND DRAWINGS
The following documents and drawings will be used as reference
• AMY-00018436-000 “Diagrama Unifilar Nuevo Switchgear 2.4 KV, S/E Nº 8”
• AMY-00015772-000 “Salt water system-GFAY harbor pump house elect.-
equiment layout”
5. STANDARDS AND CODES
Design shall comply with requirements established on the latest edition of the
following standards:
Table No. 1
Standard and Codes
PDVSA. Petróleos de Venezuela
N-201 Obras Eléctricas
N-267
Medium–Voltage Metal–Clad Switchgear from 2.4 KV To
34.5 KV
COVENIN
200 Código Eléctrico Nacional
NFPA. National Fire Protection Association
70 National Electrical Code
Global Practices–Exxon Mobil Engineering Practices
GP 16-02-01 Power System Design
GP 16-12-01 Switchgear, Control Centers, and Bus Duct

ANSI. American National Standard Institute
C37.06 AC High Voltage Circuit Breakers Rated on a
Symmetrical Current Basis – Preferred Ratings and
Related Required Capabilities
C37.55 Switchgear – Medium - Voltage Metal-Clad Assemblies –
Conformance Test Procedures
IEEE. Institute of Electrical and Electronics Engineers
C37.90 Relays and Relay Systems Associated with Electric
Power Apparatus
C37.04 Standard Rating Structure for AC High-Voltage Circuit
Breakers
C37.20.2 Metal-Clad Switchgear
C37.20.3 Standard for Metal Clad Interrupter Switchgear
C57.13 Standard Requirements for Instrument Transfomers.
NEMA. National Electrical Manufacturers Association
ICS 1 Industrial Control and Systems General Requeriments
ICS 3
Industrial Control and Systems: Medium Voltage
Controllers Rated 2001 to 7200 Volts AC
SG. 5 Alternating-Current High Voltage Circuit Breaker
6. ELECTRICAL SYSTEM CHARACTERISTICS
• Rated Voltaje: 2,4 kV
• Phases: 3
• Frequency: 60Hz

7. ELECTRICAL SYSTEM
The electrical system associated to the Substation 8 (S/S-#8) is conformed by
two (2) 13,8 kV incoming main feeders identified as circuits 15015B and 15024B.
Those circuits feed two (2) 13,8-2,4kV power transformers (Tag T-81 / T-82).
The aforementioned transformers will supply 2,4 kV to the medium voltage
switchgear (subject of this specification), having a bus-tie circuit breaker (normally
open) and an automatic transfer system.
The medium - voltage switchgear will have the following sections:
• Two (2) incoming main feeders with vacuum circuit breakers.
• One (1) bus-tie with vacuum circuit breakers (normally open).
• Two (2) medium voltage measurement cells for busbar 1 and 2.
• Nine (9) motor feeders (vacuum circuit breakers) associated to loads
installed in EBAS-1.
• Two (2) transformers feeders with vacuum circuit breakers, associated to
2,4-0,480 kV power transformers, which supply energy to motor control
centers and Service areas of EBAS-1 Plant.
The arrangement of the switch in the Switchgear should be one (1) circuit breaker
per column or section.
Each motor will have automatic reacceleration through of undervoltage relay (27).
8. ENVIRONMENTAL CONDITIONS
For designing purposes, the following conditions taken from GII “General
Instructions and Information” shall be used:
Max. for designing, dry bulb: 90 ºF (32,2 ºC)
Max for designing, wet bulb: 85 ºF (29,4 ºC)
Average Summer, dry bulb: 86 ºF (30 ºC)
• Environmental
temperature:
Min.: 70 ºF (21,11 ºC)

• Relative humidity: Max: 92%
Min: 39%
Avg: 55,4%
• Barometric Pressure: Max: 14,759 psi (1,0377 kg/cm2
)
Min: 14,672 psi (1,0315 kg/cm2
)
Avg: 14,697 psi (1,0333 kg/cm2
)
• Rainfall: Max per day: 127 mm (0,417’)
Intensity per hour: 50,88 mm (0,167’)
• General Environment: Marine, saline, highly corrosive
• Wind Speed:
(design)
113 km/h (70 mph)
• Seismic zone: 2 (According to COVENIN 1756-1/2:2002)
• Prevailing wind direction: East-Northeast (E-NE)
9. TECHNICAL REQUIREMENTS
Metal - Clad Power Switchgears shall be conformed by vertical sections of sturdy
construction, totally Clad (sheet metal), self-supported, with drawout
compartments containing power circuit breakers; full-voltage starters; control,
protection or auxiliary equipment.
Metal Clad Power Switchgear shall be designed to contain two-high power circuit
breakers or starters arrangement, according to data sheet.
Every cell or section of the switchgear shall be divided in insulated compartments
as follows:
• Busbar compartment
• Power circuit breaker compartment and/ or motor starters
• Power and current transformer compartment

Every vertical section shall be provided with coupling mechanisms so that they
can be linked or attached to adjacent cells. These couplings shall be easily
removed and suitable in order to guarantee the whole structure works as a unit.
Every cell shall be designed as to allow future expansion of the switchgear at
both ends.
Attachment Nº 3 shows a plan view of the Metal – Clad switchgear.
9.1. General
Specific Requirements such as motor starters, control devices, space heaters,
transformers, etc.; shall be indicated on the data sheet. Specific requirements and
international standards will be complimentary.
Metal Clad Power Switchgear shall include all measurement, control and
protection equipment shown on one-line diagram. Final arrangement of the
equipment will be subject to COMPANY’s approval.
Metal Clad Power Switchgear shall be manufactured in compliance with
requirements set by codes and standards specified in section 5. Likewise, they
shall be designed, manufactured and tested in accordance with ISO 9001
standard.
Switchgear’s enclosure shall be category B, as defined in ANSI/IEEE C37.20.2,
table A.1.
Controller or starters may be furnished at a maximum of two-high per vertical
section. Each starter shall occupy half of the available space.
Wiring within equipment shall be as indicated on the data sheet.
9.2. Mechanical Requirements
9.2.1. Enclosure
Enclosure shall be of metal suitable supported, constructed and assembled so
that it will have the strength and rigidity necessary to meet the requirements of
standards indicated in section 5.

Switchgear shall be designed for expansion on both ends and the enclousures
shall be of modular design so that additional units may be safely and readily
installed.
Supporting structure shall be formed of angles, channels, folded rigid sections of
sheet metal, or the equivalent, and shall be rigidly fastened together and have
essentially the same outside dimensions as the enclosure surfaces.
All screws and bolts used to assemble every section of the cell shall be provided
with lock-washers or other suitable locking connector. Visible surfaces should not
be drilled or welded to cable supports.
Switchgear shall be provided with lifting lugs (top and bottom) so that it can be
totally assembled and dispatched without breaks or cracks as well as minimum
effort during erection on site.
9.2.2. Base and Support
Cells and their units shall be fastened together in such a way that allows an easy
installation as well as swapping capabilities (if needed) in order to replace or add
units within vertical sections.
Cells shall be provided with coupling means to mechanically attach them to
adjacent vertical sections. Couplings shall be easily removable and suitable to
guarantee that all vertical sections function as one equipment.
9.2.3. Access to Cells
Cell’s design shall be as to allow easy maintenance to those components that
require inspection/maintenance periodically.
9.2.4. Access Doors
Every vertical section shall be provided with a front access door. It shall be
capable of 120º opening measured from its closing position, as to provide enough
working space for drawing out all equipment installed within the cells.
Gaskets between the door and the frame of the switchgear shall be provided, in
order to prevent water and dust from entering the equipment with the doors

closed. Gaskets shall be capable of withstanding moisture, sun rays and high
environmental temperatures. Vermin-proof mesh or stainless steel screens shall
be provided through all permanent vent openings so as to prevent bugs and
insects from entering the equipment.
Doors shall have an interlock system as to provide disconnecting means for the
equipment prior to opening its front door, and to guarantee that only after
breakers or disconnecting switches are in the “open position” will the door open.
Likewise, disconnecting switches and breakers can only be closed when doors
are closed.
9.2.5. Safety
Design of the Metal Clad Power Switchgear shall be as to prevent electrical
failures (explosion, arcs and fire) from propagating from one section to another.
Cells shall be arranged as separate compartments, preventing direct access from
one cell to the next one. Provisions for power and control cable access shall be
granted, when required.
9.2.6. Thermal Behaviour
Heat produced by radiation shall not cause temperature rise on any equipment
operating under service conditions, as per ANSI C37.20:
• Temperature rise should be specified for continuous operation at rated
current, assuming an environmental temperature of 40 ºC.
• Temperatures on deenergized sections should not rise temperature on
those energized.
• Temperature rise on busbars and connections should not exceed 50 ºC.
Temperature on cable’s terminations should not exceed 45 ºC.
• Within compartment of cable terminations and outgoing cables (feeders),
average environmental temperature should not exceed 45 ºC.
• Temperature rise on accessible sections under operation should not exceed
30 ºC.

9.2.7. Vertical Sections
Each vertical section shall be 20” width (minimum) as stated in standard C37.20.
A maximum of two (2) motor starters shall be furnished within each section.
Medium voltage starters shall be equipped with current limiting fuses, contactors
and isolating switches.
To minimize propagation of short circuit faults to adjacent cells, every vertical
section shall have be made of sheet metal with appropriate weight and thickness.
Barriers between primary sections of adjacent vertical sections shall not be less
than MSG No. 11 (nominal thickness 3 mm) according to ANSI C37.20.3.
9.2.8. Space Heaters, Outlets and Lighting
Space heaters shall be installed in every vertical section, controlled by thermostat
(continuous operation) rated as indicated in data sheets.
They will be used to keep temperature within the cells, 5 ºC above environmental
temperature in order to minimize the effects of moisture and moss. Voltage
supply to space heaters shall be done through thermo-magnetic circuit breakers.
Control system associated to space heaters shall consist of one or more
thermostat set to automatic tripping at a max temperature of 35 ºC (95 ºF) and
reclosing at 32 ºC.
To avoid condensation during storage of the metal clad power switchgear,
external temporary supply to space heaters shall be provided.
A set of duplex outlets rated 120V, 20 A, shall be provided on each side of the
switchgear.
Every vertical section shall be provided with incandescent lighting at 120V, and a
circuit breaker located at the front door which will automatically turn on the light
bulb.

9.2.9. Buses and Connections
All buses and primary connections shall be copper, rated according to ANSI
standards as to maximum continuous withstand current and short-time current,
within temperature limits established during design tests.
Bus section shall be totally enclosed and separated by sheet metal forming a duct
across all vertical sections. Bus ducts shall have provisions to avoid moisture
within itself. This may be accomplished by using space heaters or other standard
system proposed by the manufacturer.
Isolating medium on this compartment shall be air. However, buses shall be
made of flame retardant, track resistant, non-hygroscopic materials according to
thermal characteristics of buses; or insulating epoxy coat, with PVC covers
tightened with nylon on expansion joints in order to provide easy installation and
configuration.
Barriers shall be installed on the incoming section of each unit to isolate
conducting buses and terminals from the rest of the equipment.
Buses, connections and supports shall be designed to withstand mechanical
stress produced by short-circuit currents indicated in data sheets.
Bus cross-section shall be uniform along its entire length and shall be coupled to
the next bus section through suitable connections as to avoid exceeding the limit
of hottest-spot temperature rise within the cell, as well as to provide means for
isolating a specific section of the bus without obstructing a future connection.
Bus pertaining to three-phase circuits shall be arranged in such a way that from
left to right, top to bottom, front to back (seen from front side of the panel) are
identified as phase A, B, C. Likewise, for direct current circuits, bus arrangement
shall correspond to positive and negative (in that order).
9.2.10.Horizontal Distribution Buses
Horizontal buses shall be continuously fixed on each section. Maximum load to
be carried by them shall be as specified in data sheets.
No splices are allowed in any of the bus within the same section.

Bus splices to join together two sections shall have a least two bolts capable of
handling the specified load.
9.2.11.Vertical Distribution Buses
Vertical buses shall be continuously fixed and insulated to prevent accidental
contact by operators. This shall be accomplished by a non-metallic, moulded red
cover.
If required, continuous sections shall be provided placed one behind another with
vertical distribution buses isolated in the front and back of the section, containing
the same phase in every unit.
Bus splices to join together two sections shall have a least two bolts capable of
handling the specified load.
9.2.12.Ground Bus
A copper, 2”x ¼ ” ground bus shall be provided across all sections of the
switchgear.
Ground bus shall be continuous throughout the equipment. If the bus is to be
divided, interconnection shall be accomplished by using similar buses to main bus
and bolted through suitable bolts according to NEMA standards. Appropriate
connectors for linking bus coming from adjacent cells shall be provided.
Ground bus shall guarantee perfect electrical contact with cell’s structure.
For every intermediate cell within the switchgear, suitable connectors for 2/0 to
4/0 AWG wire shall be provided, in order to ground the equipment. At least four
points for ground connection shall be placed within the switchgear, two of which
shall be located at each end of the cell and accessible from the outside without
the need to open any doors.
9.3. Medium Voltage Power Circuit Breakers
Medium voltage power circuit breakers shall be vacuum, draw-out type,
electrically operated, equipped with anti-pump mechanism and stored-energy
type mechanism.

The removable element of the tripping mechanism shall consist of a three-pole
breaker with a levering device, primary and secondary switching devices,
auxiliary contacts, operational counter, all of which shall be assembled in frame of
sturdy construction, suitable for moving the element.
Circuit breakers of the same rating and their parts shall be interchangeable.
Primary and secondary switches shall be plated and of such a flexible design that
it prevents an increase in resistance due to misalignment. Installation and un-
installation of the circuit breaker unit shall be done through a rising mechanism
(maintenance cart) provided with limit switches and interlock.
Interlock between the circuit breaker and disconnecting switches shall be
provided in order to prevent:
• Moving the circuit breaker from its operational position when closed.
• Closing the circuit breaker, unless disconnecting means are fully closed and
safely apart.
Tripping of the circuit breaker shall be electrically operated with provisions for
mechanical tripping in any position. Feeding source shall be direct current, with
ratings as indicated in data sheets.
Tripping mechanism shall be mechanically projected, so that it can be unlatched
in any position and removed without affecting the alignment or adjustment of
conducting parts of the circuit breakers. They shall be provided with an
operational counter mechanically operated, installed at the front of the cell next to
manual operation controls (handles, levers, selectors, etc).
Auxiliary switches shall be provided with at least six (6) single-pole contacts,
electrically independent, that can be easily switched to “APERTURA DEL
CIRCUITO” o “CIERRE DEL CIRCUITO” as required.
Auxiliary circuits shall be capable of interrupting close current as soon as the
operation has been completed, they shall prevent the cycle from repeating and
shall allow unlatching of the breaker in any position.
Every breaker compartment shall include pilot lights and control wiring indicating
with a red light when the breaker is closed and green light when the breaker is
open.

White pilot light shall be wired as to provide an uninterrupted indication of the
service status associated to unlatching circuit (by solenoid) when the breaker is
open, every circuit breaker shall be provided with a local switch selector. Control
and signalling circuits shall foresee remote indication.
9.4. Insulation
Insulators shall be manufactured using quality parts and according to applicable
standards. Technical characteristics shall be as indicated in data sheets.
Insulators shall be appropriately installed in order to withstand mechanical and
dynamic stresses produced by short-circuit currents, without suffering any
permanent damage or deflexion that might reduce insulating capability.
Insulation between devices, buses and cables shall:
• Allow pulling of cables within the energized switchgear in a safe way. Non-
Insulated parts should not be located within pulling cable area of the
equipment. Cable terminations are accepted to be there if they can be
temporarily confined and isolated during cable pulling.
• Avoid arcing and prevent arcing’s products originated in compartments to
enter busbars.
• Avoid transmission of arcing and delay its by-product from migrating to other
compartments, even when an assembly device had been removed.
• Allow maintenance personnel to safely work on an energized bus within an
empty compartment or unit whose control devices had been removed. This
shall be accomplished by insulating the main and vertical busbars, leaving
holes for plug-in contacts.
9.5. Potential Transformers
Potential transformers shall be protected by limiting fuses and shall be located in
separate compartments. Rated volt-amperes of potential transformers shall be in
accordance with the burden to be connected to them.

Potential transformers shall be Group 1 with a max operating temperature of
55 ºC at 100VA.
9.6. Current Transformers
Current transformers for power circuit breaker shall have accuracies as per ANSI
standards and indicated in data sheets.
Insulation level shall be appropriate for the rated voltage of the switchgear. They
shall have a mechanical rating of 100 times the symmetrical amperes (rms) and
one second thermal capacity of 75 times the rated primary current.
Secondary of current transformers shall be connected to easily accessible
terminal blocks. Each current transformer shall have 5 Amperes rated secondary
current, unless specified otherwise.
9.7. Medium Voltage Starters
Motor starters will be defined by the ratings of the load (motor), contactor or
circuit breakers.
Units equipped with contactor shall be draw-out or plug-in type, combined with
current limiting fuses.
Each starter shall have an isolating switch, current limiting fuses and vacuum type
contactor, complying with the electrical characteristics indicated on the data
sheet.
Contactors shall have magnetic latch. Mechanical latch shall be provided for vital
loads when specified in data sheets.
Starter will only be accepted without an isolating switch if it is equipped with
external disconnecting means (located in front) and with electrical and
mechanical interlocks to avoid on-load disconnection.
Single phasing that results from a blown fuse shall cause the contactor to trip.
A low voltage circuit shall be incorporated within the low voltage compartment to
allow inspection of the control circuit while having the high voltage compartment
isolated and energized.

Contactors shall be provided with a local trip device, double throw, latched in
order to break the corresponding phase and neutral of the control supply voltage.
Emergency tripping devices shall be protected against inadvertent tripping, but
easily removable and operable from the front.
Main fuses shall have a characteristic curve (current-limiting fuses) designed to
withstand motor’s starting current (direct on-line). SELLER shall take all
necessary precautions to keep transient voltages within rated tolerances, during
fuse operation.
9.8. Nameplates
Permanent engraved lamacoid nameplates shall be provided identifying each
compartment, front mounted instruments and devices, including transformers,
circuit breaker, and auxiliary compartment. Equipment and terminal blocks within
the compartments shall be suitably identified. Relays shall be designated as to
use and the phase to which they are connected. Nameplates shall be mounted
with self-tapping stainless screws.
All devices inside the cubicles shall be identified with cloth markers or engraved
lamacoid nameplates mounted with stainless steel screws. Adhesive-backed
plastic labels shall not be used.
Each vacuum breaker shall be provided with a nameplate indicating the maximum
value of full wave rectified DC for checking the integrity of the vacuum bottles.
Selector switches shall be identified with nameplates indicating their function and
status (open/close, etc.)
A stainless steel nameplate showing manufacturer’s name, type and identification
number, year of manufacture, continuous current rating, interrupting rating in
amperes, and maximum voltage rating shall be provided on each circuit breaker
and switchgear assembly. Line up nameplate shall also include bus bracing in kA
(asymmetrical) along with the description of arc-resistant type construction, if
applicable.
Nameplate shall be of following background color and engraving:
• Identification nameplates - White background with black engraving

• Caution nameplates - Yellow background with black engraving
• Warning nameplates - Red background with white engraving
• Grounding PT’s and devices - Green background with white engraving
On the inside of the switchgear, a suitable storage for keeping manufacturer’s
drawings shall be provided. It shall be fixed to the equipment through galvanized
screws or any other suitable fitting. Drawings stored in plastic covers or tape-
attached to the structure of the equipment shall not be acceptable. “As built”
drawings shall be included. Failure to comply with this requirement may be
enough to reject the equipment.
SELLER’S information shall be included on a lamacoid engraved nameplate
located at the back of the switchgear and shall contain:
• Contract Number and/or Purchase Order
• Project’s Name
• Contractor
• Year of Manufacture and/or Shipping Date
• Serial Number
9.9. Control Wiring
All wiring shall be flame-resistant, 600 volts rated insulation, thermoplastic,
copper wire with insulation rated for 75° C conductor temperature, gray color.
Control cables shall run through plastic wireways or trunking, and shall not
occupy more than 75% of their cross-section area.
Exposed wiring shall be limited to a minimum. In any case, wire bundles shall be
arranged in a spiral configuration so that the bundle twists rather than bends
when door or panel is opened. Wire bundles shall be protected against
mechanical damage or contact with sharp edges by plastic spiral wrap.
Wiring subjected to movement shall have enough length as to avoid pulling of the
cables on terminal blocks whenever the bundle of cables is moved. The end of

each wire shall be tagged with the origin and destination points. Each wire shall
be permanently marked at both ends according to schematic diagrams. All wires
shall be properly identified with heat-shrink wire markers. Adhesive-back wire
markers, labels, and wire holders are not acceptable.
Power and control cables shall not be located within the main bus compartment
or vertical buses, unless fully insulated cables are used.
Control cables shall run in such a way as to provide easy inspection and
maintenance work. No cable run or trunking shall be interrupted when
installing/uninstalling meters, relay or any other devices.
9.10. Instruments, Meters and Relays
All instruments, meters and relays shall be flushed or semi-flushed mounted.
Reading scales on instruments and meters shall have black numbers over white
background.
Instruments, meters and relays shall be provided with phase shifting, auxiliary
current transformers, resistors, links, etc.; even if they are not specifically
indicated on data sheets.
Instruments’s covers shall be gasketed and fixed in place.
All protective relaying shall be front accessible switchboard draw-out type, door-
mounted with removable dust tight viewing covers and resettable operational
target.
Relaying shall be as specified on the one-line diagram or on attachments as to
manufacture, type, quantity, and style numbers. Substitution shall not be made of
an equivalent relay without the written approval of Client.
Relays shall be provided in a case with flexitest type switches or test blocks, and
provisions to automatically short-circuit the CT input when the trip circuit is
manually opened or when the relay is removed from the case. Door-mounted
flexitest switches shall be provided to inhibit trip operation of protective relays for
maintenance and testing purposes. Each protective relay trip contact shall be
connected through a separate switch in the flexitest switch assembly.
Control switches shall be rotary cam type with engraved dial plates.

• Selector type control switches shall have oval handles.
• Circuit breaker control switches shall have “pistol grip” handles.
Indicating lights shall be standard switchgear LED-type lamps with front
replaceable lamps and colored caps. Dropping resistor, if required, shall be
integral with the lights and not mounted external to the lights.
9.11. Interlocks
Mechanical interlocks shall be provided in order to:
• Prevent access to medium voltage compartments when energized
• Prevent operation of disconnect switches when starters are in “closed”
position, as well as preventing from drawing out or in a starter with a
“closed” disconnect.
• Prevent operation of starters or power circuit breakers unless disconnect
switches are closed or starters / power circuit breakers are drawn-out (safe-
mode).
10. FINISH
All metal parts shall be chemically cleaned, after welding work is done but prior to
any painting process begins. It shall consist of the following:
• Use of solvent to get rid of grease, oil, dirt and other particles.
• Final cleansing to eliminate any acid or corrosive material.
• Cleaning and treating surfaces using phosphate to eliminate corrosion and
improve paint bonding to metal surfaces.
• Specific cleaning methods used by the manufacturer may be used only after
COMPANY’s approval.

• After completion of the cleansing process, a coat of painting shall be applied
to steel surfaces (exposed to a dry and moisture-free environment).Then,
finish paint shall be applied to switchgear.
• Anti-corrosive coating and a finish paint shall beapplied to interior and
exterior surfaces of the switchgear.
• Finish color for switchgear shall be ANSI No. 61, light gray per ASTM
D1535-80 (Munsell notation 8.3.G6.10/0.54).
• Thickness for Anticorrosive coating and finish coat shall comply with the
COMPANY’s requirement.
11. TESTS
11.1. Design Tests
Copies of Certified Reports of all design tests described in ANSI/IEEE C37.20.2,
Section 6.2, shall be provided to COMPANY.
11.2. Production Tests
Provide Certified Reports of all production tests described in ANSI/IEEE
C37.20.2, Section 6.3.
The control wiring insulation test shall be performed by applying 1.500 volts to
ground, 60 Hertz for 1 minute. Switchgear mounted devices that have been
individually tested may be disconnected with the permission of the COMPANY.
All control and protective circuits of breakers shall be checked for functional
operation, which shall verify the correctness of wiring.
All polarity verification shall be performed using primary injection.
To meet conformance requirements, all assemblies must successfully pass all
tests described above.
COMPANY reserves the right to observe the manufacturing or any part of work
related to the switchgear; inspect materials, witness final tests; and evaluate
results of nondestructive examinations, when specified on the Data Sheet.

SELLER shall grant the COMPANY’s assigned inspector all-access to the plant,
suitable facilities, and seven (7) working days notice of scheduled work on the
contract.
12. DOCUMENTATION
12.1. Documentation Content
Drawing for each lineup of the switchgear shall have a unique number provided
by the COMPANY
Drawings shall have a space on the right lower corner for the COMPANY’s title
block.
Schematic drawings shall include the following information as a minimum:
• Complete schematic diagram with item numbers corresponding to bill of
materials.
• Operation and contact arrangement of over-current and control relays, and
all switches.
• Cross-reference to bill of materials and other drawings.
12.2. SELLER Drawings and Data Requirements
SELLER shall provide one reproducible set of drawings plus the specified number
of copies of all documentation and operating manuals as indicated on the Data
Sheet. Format for reproducible drawings shall be AUTOCAD (.DWG) or
MICROSTATION (.DGN). Seller will supply all drawings in compact discs (CD)
12.2.1. Bidder Documentation
Bidder shall furnish these documents with proposal:
• Extended warranty information.

• Proposed layout of equipment, showing estimated dimensions and weights.
12.2.2. Documents before Manufacturing.
SELLER shall furnish the following documents for the COMPANY’s review and
authorization to proceed before fabrication:
• Bill of materials giving schematic identification, quantity, make, rating,
model, and manufacturer.
• Equipment drawings, showing floor plans, front view elevations, relay and
control device panel layouts, typical sectional views. Drawings shall show all
locations of all equipment and devices.
• Installation drawings, showing dimensions and weights of all shipping
sections and location and type of all interconnections between shipping
splits.
• Connection wiring diagrams for all electrical equipment.
• Three-line, and control schematic diagrams.
SELLER shall furnish the following documents as part of the final Certified
document submittal:
model, and manufacturer of component
splits
• 3-line, and control schematic diagrams.

• Certified Test Reports.
• Installation, Operation, and Maintenance Manual.
• Recommended priced spare parts list.
Seller shall furnish the following documents as-built within 2 weeks following
shipment.
model, and manufacturer of component.
splits.
• Three-line and control schematic diagrams.
• As-Built Drawings.
• Complete parts list
13. SHIPMENT
Details on shipping requirements will be furnished in the purchase order. All
temporary shipping braces shall be painted yellow and marked:
REMOVER PREVIO A SU INSTALACIÓN
Instructions for storage of equipment shall be attached to the equipment.
Removable elements or items shipped separately from the switchgear shall be
clearly identified with proper description and location of installation.
Equipment shall be protected from weather elements during shipping.

Seller shall ship one set of installation, operation, and maintenance manuals with
the equipment.
All breakers shall be shipped separately in weather-tight packaging, suitable for
outdoor storage.
14. WARRANTY
Manufacturer shall warrant its equipment regarding material, design and
construction failures, as well as to grant that metal - Clad power switchgear is free
from defects for a period of twelve (12) months after the start-up or eighteen (18)
months after shipment, whichever occurs first.”
The equipment shall satisfy the requirements for the intended use and shall be
adequate for the respective application.
SELLER will replace, repair and install, at no additional cost to the COMPANY,
any defective part or equipment within the period of time mentioned above. Only
new, top quality materials will be accepted.

TECHNICAL SPECIFICATION FOR METAL-CLAD POWER SWITCHGEAR
2400 VAC EBAS-1
ATTACHMENT No. 1: ONE-LINE DIAGRAM

2400 VAC EBAS-1
ATTACHMENT No. 2: 2,4 kV SWITCHGEAR DATA SHEET

ACCESSORIES
DISCONNECTING
MEAN
STARTER PILOT CONTACTS
P. C. T. SWITCHGEAR
Equip. (1) O. G. (2) (3) LIGHT AUX. C. F. B. METER
AUX. SERV
TRANSF.
No.
TAG / LOAD
RATING POWER CIRCUIT
BREAKER SIZE FUNC-
TION
C. F.
D.
S.
W.
S.
S.
R G A Bl N.O. N.C. T. A V V φ POLES φ KVA
INCOMIG
LINE 1
POWER CIRCUIT
BREAKER
1250A X X X X 3 3 X X X X 2400 3 3
BUS TIE POWER CIRCUIT
BREAKER
1250A X X X X 3 3 X X X X 2400 3 3
INCOMING
LINE 2
POWER CIRCUIT
BREAKER
1250A X X X X 3 3 X X X X 2400 3 3
S/S 8D-1 / 300
KVA
POWER CIRCUIT
BREAKER
1250A X X X X 3 3 X X X 2400 3 3
PM-3 / 900 HP POWER CIRCUIT
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
PM-2-TK-160
/ 500 HP
POWER CIRCUIT
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
S/S 8D-2 / 750
KVA – S/S 8L
/ 750 KVA
POWER CIRCUIT
BREAKER
1250A X X X X 3 3 X X X 2400 3 3
PM-1/ 900 HP POWER CIRCUIT
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
PM-1-TK-160
/ 500 HP
POWER CIRCUIT
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
SPARE POWER CIRCUIT
BREAKER
1250A X X X X X X 3 3 X X X X 2400 3 3
LEGEND
MCP: MOTOR CIRCUIT PROTECTOR T.M.: THERMOMAGNETIC SWT.: SWITCH FU.: POWER FUSE O.C..: OVERCURRENT GFD: GROUND FAULT DETECTION R: RED G: GREEN A: AMBER
Bl: BLUE P.C.T.: POWER CONTROL TRANSFORMER C.F.: CONTROL FUSE T.B.: TERMINAL BLOCK A: AMPERES V: VOLTAGE φ: PHASE
FVNR: FULL VOLTAGE NON REVERSIBLE FVR: FULL VOLTAGE REVERSIBLE FVC: FULL VOLTAGE CONTACTOR YD: WYE-DELTA SW: SPLIT - WINDING AT: AUTOTRANSFORMER
SE: SOLID STATE
S-S: START-STOP RSR: RUN-STOP-REVERSE O-O: ON-OFF HOA: HAND-OFF AUTOMATICO

2400 VAC EBAS-1
ATTACHMENT No. 3: ELECTRICAL EQUIPMENT PLOT PLAN

E1 a0011501 se0d3-ed20000 technical specification switchgear 2400vac

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