Section 13 — Electrical

Low Voltage Switchgear

IPE Engineering Practice IPE-EP-13-5-1

Document number: IPE-EP-13-5-1 · Section: 13 — Electrical

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SCOPE

This Practice, including the Low Voltage Switchgear Data Sheets (EP 13–5–1DS), covers the minimum requirements for assemblies of low voltage, indoor and outdoor, walk–in sheltered maintenance aisle, and non walk–in outdoor type switchgear with ratings of 600 volts, 3 phase, 3 wire, 60 hertz, for operation on resistance grounded and solidly grounded systems.

This Practice is appropriate for attachment to an inquiry or purchase document when accompanied by the referenced IPE Engineering Practices and completed data sheets.

Any deviation from this Practice must be approved by the procedure in EP 1–1–3. A revision bar indicates all changes made to this Revision.

REFERENCES

All applicable sections of the latest standards and publications listed below are a part of this Practice unless amended herein.

STANDARDS AND PUBLICATIONS

STANDARDS AND PUBLICATIONS (CONT.)

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DEFINITIONS

Contractor – Company or business that agrees to furnish materials or perform specified services at a specified price and/or rate to the Owner.

Inspector –- A Inflection Point Engineering, LLC appointed engineer or inspector.

Manufacturer –- The recipient of a direct or indirect purchase order for materials and/or equipment. In this context, a direct order is one issued to a Manufacturer by a Contractor or the Owner. An indirect order is one issued to a Manufacturer by a vendor (recipient of a direct order) for materials, fabricated components, or subassemblies.

Owner – Inflection Point Engineering, LLC.

Owner’s Engineer – A Inflection Point Engineering, LLC appointed engineer.

Purchaser – The party placing a direct purchase order. The Purchaser is the Owner’s designated representative.

SERVICE CONDITIONS

Low voltage switchgear shall perform satisfactorily when operated indoors or outdoors in a walk–in, sheltered maintenance aisle housing, or outdoor non walk–in enclosure either intermittently or continuously in an atmosphere typical of petrochemical plants. The switchgear shall be designed for use in the 104F maximum ambient, –22F minimum ambient, and at an altitude of 3300 feet or lower.

DESIGN CONSTRUCTION AND MATERIALS

Basic Construction

Enclosures

• Each switchgear assembly bus shall be insulated for 600 volts AC and shall be metal enclosed, free–standing, vertical, dead–front steel structures containing power buses, a ground bus, power circuit breakers, and necessary auxiliary control devices and specified instrument transformers, relays, meters, and control and meter switches, as defined in ANSI C37.
• Access to circuit breaker enclosures and any auxiliary compartments or panels shall be from the front of the equipment by means of hinged doors provided with locking facilities to prevent unauthorized access.
• Access to the cable compartment shall be at the rear of the switchgear equipment by means of either lift–off panels or hinged doors. Latched panels or doors shall have locking facilities in the closed position. In order to minimize obstruction at the rear of the switchgear equipment, hinged doors or panels shall be capable of 180 degrees opening, or be equipped with lift–off facilities or other approved means. The cable compartment shall have adequate space for pulling, bending and terminating the incoming cables.
• Barriers shall be provided for incoming line, bus tie and rear cable compartments such that all power buses are barriered.
• All main and tie breaker cubicles shall have shutters to provide protection from power disconnects.
• The cubicle depth shall be sufficient to allow top or bottom entrance and bending and terminating of power cables.
• Vermin–proof screens shall cover all openings.
• A “HIGH VOLTAGE DANGER” warning sign shall be mounted on the front and rear of the lineup in a conspicuous position.
• Control switches, meters, meter switches, position indicating lights, etc. shall be mounted on the front of the switchgear panels and arranged in a logical, consistent, and symmetrical manner, requiring Owner approval prior to fabrication.
• Equipment Identification
• Externally visible permanent nameplates shall be provided identifying each instrument, instrument switch, meter, relay, control switch, indicating light, potential transformer compartment and circuit breaker compartment. Nameplates shall be plastic lamicoid tags, white with black letters or black with white letters, as identified on the Data Sheet with letters at least 3/8 inch high. The identification shall be the same as on the Data Sheet and/or drawings.
• Equipment and terminal blocks within the compartments shall be suitably identified and shall have the same identification as on the drawings. Identification shall be made with lamicoid tags, white with black letters or black with white letters as indicated on the Data Sheet.
• Relays shall be designated as to use and the phase to which they are connected.
• Device nomenclature shall conform to ANSI C37.2.

• Bus phasing as well as protective devices shall be laid out and “labeled” in accordance with ANSI C37 as follows: A, B, and C phase arranged from front to back, top to bottom, left to right, as viewed from the main switching device operating mechanism side. NOTE: Label bus phasing in all rear feeder compartments.
• Nameplates shall be secured with screws, or reusable plastic rivets. Equipment labels on the rear of front doors may be attached with tape or glue.
• A corrosion resistant metallic nameplate shall be provided that shall include the following:
• Manufacturer name, order number, date of manufacture
• Bus ampacity, voltage, bracing, bus material
• Overall unit sym. ampere fault rating
• Future Expansion: Provisions shall be made for the addition of future switchgear cubicle sections at both ends of the equipment with continuation of power bus, ground bus, enclosure, etc.
• Provisions for Handling, Storage and Field Erection
• Each “shipping section” of stationary structures shall be provided with removable lifting angles and/or plates suitable for crane hooks or slings.
• Equipment shall be packed, crated and rigidly braced to protect it from the weather and from damage during outdoor storage.
• Each shipping section shall be furnished with removable steel channel base plates or with provisions that will permit using pipe rollers or dollies without damaging the steel frame of the equipment.
• When specified on the Data Sheets, provisions shall be made for the customer to energize the space heaters of each shipping section during storage at the job site. The electrical connection point shall be readily available without uncrating the equipment and shall be clearly identified as to location and the electrical service requirements.
• All equipment shall be furnished assembled to the extent practicable, and for easy field assembly where factory assembly is not practicable. All nuts, bolts, gaskets and hardware should be furnished together with complete instructions for field assembly. The manufacturer shall itemize all unassembled equipment in bid.
• Space Heaters: Space heaters when specified on the Data Sheets, shall be provided in each vertical unit to prevent condensation. Space heaters shall be fed by 120 volt A.C. supplied by a CPT. Space heaters shall be controlled by a low temperature turn on, high temperature turn off thermostat.

• Painting: The switchgear enclosures shall be cleaned, primed and painted with a minimum of two coats of paint. The final finish for indoor switchgear shall be ANSI No. 61 gray. The finish for the exterior of outdoor switchgear shall be ANSI No. 61. Paint methods, materials, finishes and testing shall comply with the requirements of ANSI C37.20.1 as a minimum. The seller shall supply two quarts of matching paint per color per assembly of switchgear for field “touch– up” after installation. The touchup paint shall be supplied in aerosol cans with non–CFC propellant and with appropriate MSDS forms (sheets). See Data Sheet for non–standard colors if required.
• Switchgear Arrangement: The switchgear arrangement will be as shown on the attached Drawings. Alternative arrangements by the Manufacturer are encouraged if they result in cost/ space savings. The alternative shall be offered in addition to that specified.
• Equipment to be Furnished: The equipment to be furnished in each assembly and any special instructions will be shown on the Data Sheets. Unless specified otherwise, future positions shall be fully wired and outfitted to accommodate a circuit breaker, and spares shall be fully equipped with a circuit breaker.
• Outdoor Assemblies (Walk–in and Non Walk–in)
• Switchgear assemblies for outdoor installations shall be weather and rodent proof, and equipped with lighting, convenience receptacles, and thermostatically controlled unit space heaters. In addition, if specified on the data sheet, the overall enclosure shall have thermostatically controlled forced air heat; heater and fan shall be controlled by an on–off–auto switch. Outdoor enclosures shall comply with ANSI C37.20.1.
• Positive ventilation when specified, shall be accomplished by a blower such that the temperature in the maintenance aisle will be no more than 5 F higher than the outside temperature of 95 F. Blower suction shall be taken within 12 inches of the top of the assembly wall. The fan motor shall be supplied power from switchgear CPT. Control shall be via an on– off–auto switch, thermostat and manual starter which shall be supplied as part of the assembly.
• Walk–in enclosure aisle width shall permit easy breaker withdrawal for test and maintenance purposes without exposure to inclement weather. Doors, lockable with padlocks, shall be provided on each end of the assembly, unless otherwise noted. Doors must permit opening from the inside even when locked.
• The under surfaces of the switchgear shall have a heavy rubberized sealing material, or similar approved anti–corrosion coating.
• Full height front and rear outer hinged lockable doors shall be provided on each vertical section.
• Exterior hardware shall be corrosion resistant material preferably stainless steel, copper-free aluminum or corrosion resistant cadmium or zinc plated steel.
• 600 Volt Class Motor Control Centers
• Where 600 volt class motor control centers are shown on the Data Sheet and/or single line diagrams as being an integral part of the switchgear lineup, they shall be in accordance with EP 13–6–2 which will be attached and made a part of this Practice.

• Where cubicles housing motor control centers are inserted as a part of the switchgear lineup, integrity of the metal clad sections of the switchgear shall be fully preserved.
• Wiring
• Control Wiring
• Each internal interconnecting wire shall be identified at each end with a plastic sleeve type marker, or shrink tubing stamped at each end with the complete destination address. Tape type wire marks are not acceptable. Wire marks shall match the manufacturer’s interconnection drawing. Wiring diagrams as well as wire marks, device and terminal strip identification shall use a destination address identification system approved by the Owner.
• Control wiring shall be stranded copper wire #14 AWG or larger. DC main distribution circuits shall be stranded copper wire #8 AWG or larger. All internal switchgear control and power wiring shall be insulated with XHHW, XHHW–2, RHW, SIS or MTW type insulation rated 600 volts to ground.
• Compression type terminal lugs with insulated sleeves and spade tongue type (except ring tongue type on all current transformer circuits) shall be used.
• Terminal blocks shall be suitable for terminating spade and ring tongue type lugs. Blocks shall be rated, 20 ampere, 600 volts or higher as required. A minimum of 20 percent spare terminal spaces shall be provided and all spare spaces shall have screws inserted.
• The terminal blocks for the first termination of current transformers shall be the shorting type.
• The ground connection for current transformers shall be made at the first terminal block, and not at the current transformer.
• Control wiring terminal blocks for termination of Owner’s interconnection wire shall be located in the rear outgoing power cable termination compartment.
• Owner’s Power Cable Wiring: Provisions shall be made to terminate load conductors of the type, quantity, and size of conductors as specified on attached Drawings/Data Sheets.
• Switches and Control Circuits
• Breaker control switches on electrically operated breakers shall not be mounted adjacent to meter switches, and shall have “pistol grip” handles.
• Analog meters shall have switches with “knurled knob” handles. Ammeter and voltmeter switches shall have an “off” position.
• Selector type control switches shall have “oval” handles.
• When a breaker is specified on the Drawings as a “motor control unit”, the breaker shall be provided with a door mounted standard control switch, and a permissive switch. The permissive switch shall be a 3 position selector switch, G.E. SBM type or equivalent. The breaker shall be wired for control from a remote “start–stop” push–button or the local control switch, through the permissive switch as follows:
• “Remote” Position

• Breaker can be closed or tripped by the Remote Control Station only when the breaker is in the fully connected (or operate) position.
• Breaker can be tripped by the Local Control Switch, but cannot be closed by the Local Control Switch.
• “Off” Position
• Breaker is tripped whenever the permissive switch is in the “Off” position.
• Completely disconnects the Remote Control Station, and the Local Control Switch.
• “Local” Position
• Completely disconnects the Remote Control Station.
• Breaker can be closed by Local Control Switch only when the breaker is in the “test” or “disconnected” position.
• Breaker can be tripped by Local Control Switch when the breaker is in any position.
• Control Circuits
• The voltage for control circuits shall be as specified on the Data Sheet. A continuous control bus, insulated for 600 volt shall extend the entire length of the switchgear and terminals shall be provided at each end for connecting to the supply source. The switchgear shall be provided with a double fused circuit for tripping and closing.
• The “breaker closed” red indicating light shall be in series with the circuit breaker trip coil and in parallel with the relay trip contacts so that the light is turned on by current flowing through the circuit breaker trip coil whenever the circuit breaker is closed. A green breaker open light shall be powered by the close circuit and controlled via a breaker 52b contact and powered via the close circuit power which is fused separate from the trip power.
• The control circuits shall be designed and arranged so that the breaker is operable in test position.
• Switchgear control circuits shall be segregated as follows
• Each main and tie shall be sourced by a separate (dedicated) D.C. circuit when specified by

D.C. control.

• Each power bus shall be sourced by a separated (dedicated) D.C. circuit when specified by

D.C. control.

• All indicating lights shall be the type specified on the data sheet.
• Open “knife” switches shall not be used as a power disconnect device.
• Protective Relays and Meters
• Main incoming breakers and tie breakers shall be equipped with 3 phase solid state selective trip units; or a shunt trip actuated by overcurrent relays. Provide long time, short time trip characteristics, unless specified otherwise. For solidly grounded systems provide ground fault detection and adjustable solid state trip unit with long time, short time trip.

• In general, feeder breakers shall be equipped with 3 phase solid state selective trip units with adjustable long time and adjustable short time characteristics. Instantaneous characteristics shall be provided only when specified on the attached Drawings/Data Sheets. For solidly grounded systems provide ground fault detection and adjustable solid state trip unit with long time, short time trip.
• Breakers for motor control shall be equipped with solid state adjustable long time, adjustable instantaneous trip unit, and additional relaying as shown on the attached Drawings/Data Sheets. For solidly grounded systems provide ground fault detection and adjustable solid state trip unit with instantaneous trip.
• All induction disc, hinged armature, and plunger type protective relays and watt–hour meters shall be drawout type (unless specific non–drawout types are specified on the Data Sheets), and protective relays shall have operation indicators.
• All solid state trips units shall have visible trip indicators for all tripping functions.
• Analog meters, when specified, shall be switchboard type, taut band, with a minimum 250 scale.
• Relaying and metering (type and quantity) shall be as shown on the Drawings/Data Sheets.
• “86” lockout relays when required shall be of the electrically operated latched type with manual reset equivalent to a GE HEA or Electroswitch LOR.
• Instrument and Control Transformers
• Current Transformers
• Current transformers shall have 5 ampere secondaries and primary ratings as shown on the Drawings.
• Accuracies shall be in accordance with ANSI C57.13 for the metering and relay applications shown on the Drawings.
• Current transformers shall be mounted to provide easy access of connection terminals.
• Current transformers shall be rated to withstand the short circuit and basic impulse levels of the switchgear.
• The ground connection for current transformers shall be made at the first terminal block and not at the CT.
• Potential Transformers
• Potential transformers shall be stationary mounted type with primary and secondary current limiting fuses. Potential transformers and their fuses shall be readily accessible from the front of the line–up without having to remove bolted panels.
• Potential transformers shall have 120 volt secondaries.
• Auxiliary Control Power Transformers (Auxiliary Station Service not Breaker Control Power Transformer)

• Auxiliary control power transformers (ACPT) shall have disconnecting type primary current limiting fuses. Secondary protection shall be specified on the attached Drawings/Data Sheets.
• Control power transformers shall have 240/120 volt secondaries.
• The ACPT shall have a KVA continuous rating based on not exceeding 115 C average temperature rise as measured by resistance (185 C limiting temperature).
• The transformer shall be designed to the same basic impulse level as that of the switchgear.
• It shall be the dry type and shall have the standard one plus and minus 7–1/2% taps below rated voltage.
• A circuit breaker distribution panel shall be included when specified on the Data Sheet.
• The ACPT shall be connected to the high voltage bus at the point indicated on the drawings and/or sketches.
• When specified on the Data Sheet, the ACPT’s secondary system shall be provided with a linear actuated automatic transfer switch. The location of the transfer switch shall be as indicated on Drawing/Data Sheets. If mounted in the switchgear, it shall be fully accessible from the front of the assembly.
• Power Circuit Breakers
• The power circuit breakers shall be 3 pole, air break, drawout type, provided with self–aligning line side and load side disconnecting devices. They shall comply with ANSI C37.13 and C37.16 for load and fault capabilities when tested in accordance with ANSI C37.50 and C37.14.
• The drawout mechanism shall hold the breaker rigidly in the fully connected, test, and fully disconnected positions.
• All contact points for interconnection between the drawout circuit breaker and the cubical shall be wired out to and terminated on an accessible terminal block.
• It shall be possible, when the breaker is open, to move the breaker to any of the three positions, with the door open or closed.
• Breakers will be manually and/or electrically operated. The type of operation will be indicated on the Drawings/Data Sheets. Breakers of the same ratings and control shall be completely interchangeable.
• Manually operated breakers shall be equipped with the “stored energy operation” type of mechanism and an externally visible position indicator.
• Electrically Operated Breakers
• Breakers shall be the “stored energy operation” type. Breakers shall have provisions for manual closing and tripping. All breakers shall operate without intentional delay on initiation (i.e., quick close).
• Breakers used as motor controllers shall be wired for control from a remote push–button station and shall have provisions for electrical operation from the compartment door for testing the breaker (See paragraph 5.3.4).

• Each breaker shall have a red and green light to indicate whether the breaker is in the open (green) or closed (red) position.
• Control voltage and source will be indicated on the Data Sheets. The control circuit for each breaker shall be individually fused. Fuse blocks shall be dead front pull out type.
• Unless specified otherwise, control voltage for double ended substations main–tie–main breakers shall be via a CPT located on each bus with an automatic transfer scheme.
• Breaker frame sizes and continuous current ratings shall be as indicated on the Drawings/Data Sheets.
• All spare cubicles shall be fully equipped (except breaker) and ready to accept an electrically or manually (as specified) operated breaker.
• Fused Power Circuit Breakers
• Fused power circuit breakers, shall be equipped with current limiting fuses integrally mounted with the switchgear.
• The current limiting fuses shall be coordinated with the solid state trip devices such that faults within the rating of the breaker will be interrupted by the breaker and faults which exceed the breaker rating will be interrupted by the fuses.
• Each fused breaker shall be equipped with open fuse tripping and lockout device with indicator. Fused breakers and assemblies shall be provided with suitable interlocks to insure that fused breakers cannot be interchanged with non–fused breakers with the same frame rating.
• In addition to the operating and disconnected positions, an intermediate test position shall be provided to facilitate the operation of the circuit breaker with the primary circuit disconnected. Changeover of the circuit breaker between the operating, test, and disconnected positions shall be mechanically prohibited with the circuit breaker closed.
• Each circuit breaker shall be equipped with secondary disconnecting contacts, which shall automatically engage in the operating position, and which shall be engaged automatically or manually in the test position.
• Means shall be provided for only padlocking the breaker in the disconnect position. When padlocked in the disconnected position, it shall be impossible to rack the breaker to the connect position.
• The circuit breaker shall be provided with a mechanical trip (open) push–button, a mechanical close/open indicator, and a mechanical operation counter.
• Each circuit breaker shall be equipped with appropriate protection as outlined in Section 5.4 and the Data Sheets. Sensors (current) used by solid state systems must be fully rated for the breaker frame size. Selection of relay pickup current, as indicated on the Data Sheets shall not require removal of the sensor.
• Provision shall be made to test and calibrate the time and current characteristics and trip circuit by means of a portable plug–in test device.

• Manual control of the circuit breaker, accessible at the operating face of the equipment, shall be provided. Trip circuit monitoring facilities shall be provided. It shall not be possible to activate the closing mechanism of the circuit breaker if the trip circuit is energized.
• When specified, facilities shall be provided for remote electrical tripping of the circuit breaker. A shunt trip with trip circuit voltage as indicated on the Data Sheets shall be provided on the breakers for remote trip and fault protection operation.
• The circuit breaker position - operating (open/closed), test, disconnected and the charge conditions of the stored energy mechanism shall be indicated at the operating face of the equipment.
• Power and Neutral Bus
• Power Bus
• Buses and primary connections shall be made of copper. All bolted joints shall be tin plated. Silver plating shall not be used. There shall be at least two bolts per joint. The main bus shall be continuous except where splits are necessary for ease of shipment and handling, in which case copper splice bars and bolting shall be provided.
• All buses (main and vertical bus) shall be completely isolated and insulated/fully clad with flame retardant, nonhygroscopic, high dielectric insulation.
• Main busbars shall have the ratings as shown on one–line diagrams and the same cross– section and rating throughout the switchgear. Tapered busbar systems shall not be used. Vertical busbar risers shall maintain the same cross section and rating through the panel and shall have a continuous rating of not less than the sum of the nameplate ratings of the interconnected circuits. The bus connections to the circuit breakers shall match the breaker ratings.
• Horizontal and vertical buses shall be isolated or insulated from the cable compartment by barriers such that when a rear door is open, the only exposed “live” bare parts shall be the breaker load terminals. Additional “rear area” space shall be provided for outgoing cables.
• Buses shall be mechanically braced to withstand the maximum symmetrical short circuit closing and latching rating of the largest rated MVA breaker in each assembly.
• The load terminals on all breakers located in the bottom cubicle in each vertical section shall be arranged (raised, extended, etc.), to permit easy connections of incoming cable without the need for trenches or vaults. The top stabs of all feeder breakers shall be connected to the main buses.
• The continuous rating of the main buses shall be as shown on the Data Sheets and bus connections to circuit breakers shall match the circuit breaker frame rating.
• Future compartments shall be equipped with all racking mechanism components, line and load stabs, and secondary control disconnect contacts.

• Load termination bus stabs/pads shall be oriented in a 45 to 60 degree orientation from horizontal toward the specified load cable entrance (top or bottom) to allow direct connection of the Owner’s top/bottom entry load cables without having to bend the cables 90 degree to match up to the load bus termination pad. Holes shall be provided for the Owner’s double hole double crimp cable lugs.
• Neutral Bus: When specified on the Data Sheet, a full capacity neutral bus shall be supplied. The short circuit rating shall be at least equal to the main bus. The neutral bus shall comply with Paragraph 5.7.1.1 and 5.7.1.2.
• Bus Duct
• Flanged bus ducts, when specified on the Data Sheets, shall be furnished as part of each switchgear assembly, to connect the switchgear to the supply transformer or supply bus duct.
• The bus duct Manufacturer shall include all necessary flexible connectors to connect the bus duct to the switchgear. Insulated power cable is not an acceptable “flexible connector”.
• When bus ducts are identified as the source (incoming) raceway/conductor, it shall be the switchgear Manufacturer’s responsibility to coordinate and match the bus ducts to the associated switchgear assemblies.
• Ground Bus
• A 1/4–inch x 2–inch or larger copper ground bus shall be provided the entire length of the switchgear, affording connections in each vertical section, and equipped with solderless #2/0 cable connectors at each end.
• The ground bus shall be accessible for workmans’ grounds.
• High Resistance Grounding
• General
• When a high resistance grounding system is specified, the complete grounding system shall be provided, including the resistor with all components mounted/located in the switchgear.
• Unless specified otherwise, the continuous ground fault current shall be limited to 5 ampere maximum and 3.5 amperes minimum.
• The resistor shall be connected directly to the switchgear source transformer neutral with no disconnecting device in the circuit.
• The neutral ground resistor shall comply with EP 13–10–1 and the associated (filled out) Data Sheet EP 13–10–1DS.
• Current detection/measurement shall be by actual measurement of the current in the source neutral conduct (i.e., via a current transformer around the neutral conductor).

• Standard, alarm only neutral grounding system. The system shall include:
• A ground fault alarm contact for Owner’s use (rated 125 VDC, 10 ampere).
• A test circuit with a normal test light requiring manual reset to clear alarm and/or indication.
• Utility grade relays to monitor and initiate the ground fault alarm system.
• A switch to turn off the neutral ground detection scheme that removes all components from service except the neutral ground resistor and ammeter.
• An ammeter that indicates neutral current.
• Fault sensing via a current scheme utilizing a current transformer in conjunction with the monitor (protective) relay.
• “Pulsating” Ground Fault Locating System. The system shall include:
• A ground fault alarm contact for Owner’s use (rated 125 VDC, 5 ampere minimum).
• Pulse test circuit actuated by a test “on–off” selector switch.
• Panel lights to indicate normal operation and fault condition.
• Fault condition light shall be supervised by a manual reset push button to clear the alarm/ indication.
• An ammeter that indicates neutral current.
• A pulse current that shall be less than 7.5 ampere.
• A switch to turn off the neutral ground detection scheme that removes all components from service except the neutral ground resistor and ammeter.
• A current probe (when specified) to measure pulsation currents in the load power conductors.
• Test and Maintenance Accessories
• Circuit Breaker Accessories: The following switchgear accessories (as required for breaker test and maintenance) shall be furnished with each assembly, or groups of assemblies in the same switch room. The quantity of accessory “sets” will be given on the Data Sheets.
• Test cabinet for testing electrically operated breakers or an approved equivalent means of testing breakers.
• Set of secondary control contact couplers for electrically operated breakers.
• Hand cranks for moving breakers from the connected, test, or disconnected position.
• Breaker maintenance closing device, for manual closing of the circuit breaker.
• Devices for manually charging “stored energy” mechanisms on electrically operated breakers.
• Rails, dolly and chain hoist for removing breakers from compartments. One set required on each assembly. The elevating table type device is not acceptable.
• Switchgear Accessories
• Fuse extraction tools if necessary
• One set of protective relay test jacks/plugs
• Quote add/delete one solid state relay test set

TESTING AND INSPECTION

• Testing

• The Manufacturer (or seller/fabricator) shall perform all testing specified in this EP and all ANSI production tests for switchgear enclosures (ANSI C37.20 and C37.51), circuit breakers (ANSI C37.50) bus ducts (ANSI C37.23), relay and control circuits (ANSI C37.2, C37.50, and C37.51). All tests shall be done at the Manufacturer’s (seller/fabricator’s) plant, unless directed otherwise by the Owner.
• Testing shall be done on completely assembled equipment. Interconnection wiring shall be via actual wiring harness supplied with the job and not temporary test jumpers. In the case of switchgear being supplied in prefabricated substation buildings, the test shall be performed with the switchgear completely installed in the building. The testing of the switchgear shall be the responsibility of the switchgear Manufacturer or supplier and not the building fabricator.
• Factory tests shall be done using rated voltages and/or current.
• Testing shall include the standard ANSI production tests for the circuit breakers, bus and cubicles and shall also include the following:
• Manufacturer’s standard tests.
• High potential tests on main buses, circuit breakers, bus duct, control power buses, and control wiring.
• Operational test of each power circuit breaker. Control wiring shall be energized and electrically operated devices shall be operated in both normal and test positions. Circuit breakers shall also be manually operated. All job order breakers shall be available and used for witness testing. The use of shop breakers is not acceptable.
• All automatic transfer systems shall be tested to demonstrate proper operation under normal and abnormal conditions. Tests shall be done with control wiring and 480v switchgear buses energized at rated voltage.
• All current transformers and secondary circuits shall be verified via primary current and voltage. Verification of metering and relay current circuit operation shall be accomplished via primary current and voltage (low voltage, high current source is acceptable as the current source).
• Operation of all protective devices (relays) shall be tested by electrically operating the device with its control circuit energized to verify that the relay will trip its associated circuit breaker(s) or other control device(s).
• Check/verify each circuit breaker’s anti–pump and trip free features.
• Remote control systems shall be tested to demonstrate proper operation under simulated conditions.
• Operation of key and electrical interlock systems shall be tested.
• Mechanical operation tests per ANSI C37.50.
• Trip timing tests, for solid state protective devices.
• Electrical resistance of current path test.
• All current transformer secondary circuit continuity, ratio and connections shall be verified via CT primary current injection.
• Using primary three phase 480 volt power, CPT’s shall be energized and operation of transfer schemes, when supplied, shall be verified under actual loss of voltage conditions.
• Operation of space heaters shall be tested with the heaters energized.
• Circuit breaker interchangeability shall be demonstrated.
• In all cases, draw out circuit breakers when provided as part of a switchgear assembly shall be tested as part of the assembly.
• Any additional tests as outlined/specified on the Data Sheets and purchase documents.

6.2 Witness Testing

When witness testing is specified, the Owner shall witness the complete testing of all items outlined in Section 6.1.

DRAWINGS AND DATA REQUIREMENTS

All drawings provided for this equipment shall show equipment as specified and ordered. Typical drawings are not acceptable unless they are revised to show only the equipment being furnished. Drawings shall be supplied in the quantities shown on the Data Sheets.

• Information to be Supplied with Quotation
• Specific listing of any exceptions to those requirements specified.
• Equipment or features included but not necessarily specified.
• Sketches showing:
• Equipment layout/orientation with dimensions.
• Proposed one line diagram including CT’s, PT’s, CPT’s and protective devices.
• Number of Days of Field Service allowed (when specified) and Cost Per Day.
• The proposal shall include a complete list of unit prices including the cost to add or delete any circuit breaker, and vertical section.
• Complete lists and descriptive data of all equipment and accessories proposed shall be included and any components not manufactured by the Seller submitting the proposal shall be so noted as well as the Manufacturer and type proposed.
• Quote must be for equipment as specified, including any requested alternatives. Manufacturer recommended alternatives shall be provided with associated adds/deducts.
• Itemized list of unassembled equipment (see paragraph 5.1.4.5).
• Cost for witness testing, if specified.
• Information to be Submitted for Owner Approval after Receipt of Order
• Complete Structural Drawings showing:
• Arrangement and front panel layouts
• Dimensional plan and elevation, front view, and other elevation views, if pertinent
• Conduit entrance locations and dimensions for both top and bottom entrance
• Bus bar locations and configurations
• Incoming and outgoing power cable terminator positions
• Purchasers wiring terminal block locations, and all other terminal block locations
• Identify all items that will require field assembly
• Anchor bolt locations
• Grounding connections
• Weight of equipment
• Number, location and weight of each shipping split.
• Three Line Diagrams: Three line diagrams shall show all:
• Instrument and potential transformers
• Relays
• Meters and meter switches

• CPT (Station and/or control transformers)
• Other pertinent devices
• ANSI device function numbers shall be used throughout (ANSI C37.2)
• ANSI C37.11 shall be used for diagrams
• Elementary Diagrams
• Elementary (schematic) diagrams shall be furnished for each different electrically–operated breaker control scheme and drawn to ANSI Standards.
• Each elementary diagram shall show all control devices and device contacts, each of which shall be labeled with its proper ANSI device function number.
• Detailed Connection (Wiring) Diagrams showing:
• All wiring within each unit.
• All interconnecting wiring between units.
• Identification of all terminal blocks.
• Clear identification, by some distinguishing method, of all wiring which is to be installed by Owner. This shall include spare auxiliary contacts and relay contacts which shall be wired to terminal blocks for future use.
• Tabular wiring diagrams are not acceptable. Wiring diagrams as well as wire marks, devices and terminal blocks shall use a destination address identification system.
• Typical drawings are not acceptable.
• Detailed listing of all nameplates.
• Recommended list of spare parts with prices.
• Certified Information to be Supplied
• All information requested in paragraph 7.2.
• Installation and Operating Instruction: Installation and operating instructions shall cover all the equipment furnished including all protective relays, curves of each relay and power fuse, auxiliary relays, etc.
• Material List: A material list shall be furnished listing the quantity, rating, type, and Manufacturer’s catalog number of all equipment in each unit.
• Test Reports for testing outlined in 6.1.
• When specified on the data sheet, provide information in electronic format as detailed in Table 1.

SPARE PARTS

A complete spare parts recommendation based on the total purchase order is required within 60 days after the Manufacturer receives the purchase order. Spare parts recommendations shall include:

• A complete spare parts list, including parts location diagrams or drawings.
• List of priced spare parts as recommended by the Manufacturer to be on hand during plant start–up and the first year’s operation.

SHIPPING

• ’Preparation for Shipment’ shall be in accordance with Manufacturer’s standard, unless otherwise noted on the ’Request for Quotation’ and/or Purchase Order. The Manufacturer shall be solely responsible for the adequacy of the ’Preparation for Shipment’ provisions employed in respect of materials and application, to provide materials to their destination in ex–works condition when handled by commercial carrier systems.
• When shipped separately, power circuit breakers shall be individually crated and tagged with their rating and model number.
• Relays shall be shipped installed in the stationary structures and shall be securely blocked and braced to prevent damage during shipment.
• Each “shipping section” of stationary structures shall be provided with a permanently attached, readily visible, identification tag.

10.0 TABLES

TABLE 1

CERTIFIED INFORMATION REQUIRED IN ELECTRONIC FORMAT FOR ELECTRICAL PER EP 13–5–1

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