Installation

Seismic certification is an optional feature in the MotorSet product line that provides seismic conformance options to any of the North American and International building codes and seismic design standards identified in List of Supported Regional Building Codes and Seismic Design Standards. A MotorSeT product that is seismic certified has been certified to the seismic requirements of the listed code per the manufacturer’s certificate of compliance (CoC). Equipment compliance labels and CoC’s are provided with all seismic certified MotorSeT products. Refer to the equipment CoC for certification details and applicable seismic parameters. To maintain the validity of this certification, the installation instructions provided in this section must be followed.

The MotorSeT equipment is considered a nonstructural building component as defined by regional building codes and seismic design standards. Equipment capacity was determined from tri-axial seismic shake-table test results in accordance with the International Code Counsel Evaluation Service (ICC ES) Acceptance Criteria for Seismic Certification by Shake-Table Testing of Non-structural Components (ICC-ES AC156).

An equipment importance factor, I_p, that is greater than one (I_p > 1.0) is assumed and indicates that equipment functionality is required after a seismic event and after seismic simulation testing. This importance factor is applicable for designated seismic systems (for example, special certification) servicing critical infrastructure and essential buildings where post-earthquake equipment functionality is a requirement.

Incoming and outgoing bus, cable, and conduit must also be considered as related but independent systems. These distribution systems must be designed and restrained to withstand the forces generated by the seismic event without increasing the load transferred to the equipment. For applications where seismic hazard exists, it is preferred that bus, cable, and conduit enter and exit the bottom of the equipment enclosure.

Seismic certification of nonstructural components and equipment by Schneider Electric is just one link in the total chain of responsibility required to maximize the probability that the equipment will be intact and functional after a seismic event. During a seismic event the equipment must be able to transfer the inertial loads that are created and reacted through the equipment’s force resisting system and anchorage to the load-bearing path of the building structural system or foundation.

Anchorage of equipment (for example, nonstructural supports and attachments) to the primary building structure or foundation is required to validate seismic conformance. The construction site structural engineer or engineer of record (EOR) or the registered design professional (RDP) is responsible for detailing the equipment anchorage requirements for the given installation. The installer and manufacturers of the anchorage system are responsible for assuring that the mounting requirements are met. Schneider Electric is not responsible for the specification and performance of equipment anchorage systems.

The equipment enclosure provides anchorage tie-down points to accept anchor attachments to the building structure or foundation. Indoor and outdoor enclosures provide enclosure base frame clearance holes for bolted anchorage attachments as shown in job drawings.

Equipment installations of single, stand-alone sections must be anchored using all enclosure tie-down points as shown in job drawings for indoor and outdoor applications respectively. Equipment installations of multiple-section lineups (2 or more MotorSeT units bolted together) may not require every tie-down point to be used and specifics will be shown in the job drawings.

Equipment installations using welded supports and attachments in lieu of bolted supports and attachments must ensure the weld locations are distributed similarly to the locations of enclosure anchorage clearance holes. Welded supports and attachments must be properly sized to ensure the weldment withstand capacity exceeds the earthquake demand at the location of equipment installation. Precautions shall be made to properly vent and shield the equipment enclosure during the field welding process. Schneider Electric is not responsible for equipment damage caused by field welded supports and attachments.

The bolted anchor assembly view depicted in job drawings illustrates the equipment’s as-tested attachment to the seismic shake-table test fixture. The equipment seismic rated capacity, as stated on the Schneider Electric CoC, was achieved with the identified size and grade attachment hardware. For bolted attachments, the use of grade 5 or better hardware with thick, hardened, Belleville conical spring washers, where specified in job drawings, are required to maintain seismic conformance. Field installed equipment attachment and support detailing shall be in accordance with the anchorage system requirements as defined by the construction site EOR or RDP.

To access the isolation section compartment, follow these steps:

1. Remove the bolts attaching the side cover and set the cover aside.

   Side Cover Panel

   

2. If an optional keylock is provided, use the key to unlock the isolation section front door.

3. Completely loosen the upper and lower bolts on the bolted isolation compartment door.

   Isolation Section Door

   

4. The isolation compartment door can now be opened.

5. When reversing the above steps to install the medium voltage isolation section side cover and front door, make sure to fully tighten the bolts attaching the side cover and front door, and lock the door lock (if a keylock option is included).

To access the medium voltage compartment, follow these steps:

1. If an optional keylock is provided, use the key to unlock the medium voltage door.

2. Loosen the screws in the upper and lower right corner of the medium voltage door.

   Medium Voltage Door

   

3. Rotate the medium voltage door handle up and pull the door open.

4. When reversing the above steps to close the medium voltage door, make sure to fully tightening the screws in the upper and lower right corner of the door and lock the door lock (if a keylock option is included).

1. Remove the compartment covers.

2. Bolt splice plates and bus bars together. Follow the assembly instructions in Bus Connections.

If insulated bus is provided as optional equipment, insulate all field assembly primary joints and terminations for the operating voltage. The two methods of insulating joints are:

• Boots (where applicable)

• Taped joints for others

See Taped Joints for the joint insulation (when required) procedure.

When it is required to tape joints, follow these steps:

1. Prepare all joints as described in Ground Bus Connections.

2. Form a smooth surface for taping by filling all cavities around the bolts and nuts with a 4-in. wide filler compound to block incoming air.

   NOTE: This compound is used to fill air gaps and block incoming air. It is not intended to be used as a standalone insulating medium. Do not use it for insulating purposes.

3. Cover conductors and hardware with at least 1/8-in. of filler.

4. Apply urethane tape 210 (1-1/2-in. wide, 0.0010 thick), starting with a minimum of 1-1/4-in. over the end of the busbar insulation and fully covering the joint at 2/3 seam lap using two layers. Apply additional layers to sharp angles to obtain equivalent of the insulation on the flat surfaces.

5. Apply a vinyl finish tape (black or red), beginning 1-in. over the end of the urethane tape, fully cover at 2/3 seam lap forming a smooth tight covering.

6. Mask off busbar insulation and brush a heavy coat of brown varnish over the final taping. If necessary, the varnish can be thinned using xylene.

7. Inspect bus work and phase barriers to ensure that no tools or other objects are left inside the unit.

8. Replace all covers that were previously removed.

Insulated main busbars (when supplied) are insulated with a high temperature thermoplastic material having dielectric and mechanical properties. When it is necessary to clean the insulated main busbars, use a clean cloth dampened with either distilled or purified water or isopropyl alcohol to remove any foreign material from the insulation surfaces.

When shipping several sections of switchgear for a lineup, it is necessary to disconnect the main bus before shipping.

• It is important that the load break interrupter switchgear be anchored in place before reconnecting the main bus.

• It is essential that the bus bar connections be securely bolted to create the necessary pressure for proper conductivity between the bus bars.

Refer to the provided drawings and Bolt Torque Values for Bus Connections for more information.

Follow these steps for all field-assembled joints in primary conductors, regardless of material or insulation method:

1. Wipe the bus surface clean. Do not use sandpaper or any abrasive on the plated surface. Avoid touching the cleaned surface as much as possible.

2. Join the clean contact surfaces by using the hardware provided, see Busbar Connections for more information.

3. Use the torque values as listed in Bolt Torque Values for Bus Connections.

   NOTE: The torque values in Bolt Torque Values for Bus Connections do not apply to the contact mechanism of switches.

Busbar Connections

Before making cable connections, check to verify if special site preparation requirements are needed. Determine the phase identity of each cable and tag the cable accordingly. Avoid sharp turns, corners, and edges that could damage or weaken the cable insulation. Follow the cable manufacturer's instructions to determine the minimum bending radius of the cables. It is important that the connections be clean and securely bolted.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Connect the ground bus to the proper equipment ground according to the local installation code requirements. The ground bus must be connected for proper operation of relaying and instrumentation, and for personnel safety. Ensure that all parts of the equipment are grounded properly. Failure to follow these instructions will result in death or serious injury.

The ground bus is bolted to the frame near the bottom of the equipment. It is arranged so that connectors to the station ground can be made in any unit. If the equipment is shipped in more than one group, connect the sections of the ground bus by using the splice plates provided with the equipment. Assemble joints as described in Bus Connections.

Ground bus connections are made in the lower portion of the cable entrance compartment. Connect the ground bus to the station ground bus using a conductor with a current-carrying capacity equal to that of the ground bus.

DANGER

HaZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Disconnect any backfed transformers and safely ground the primaries before energizing the auxiliary power. When supplying external sources of control power to this switch, it can cause backfeed to the high voltage bus through control power or potential transformers. Remove all grounds prior to energizing this equipment. Failure to follow these instructions will result in death or serious injury.

Control wires between shipping sections should be reconnected as marked by the factory. Connections which are to be connected to the terminals in an apparatus remote from the switch should be carefully checked against the connection diagram. When making connections to terminals, care should be exercised to assure that the connections are properly made.

If it is necessary to realign the doors of the equipment during installation, follow the steps below:

1. Check the equipment to ensure it is level and can be supported by the installation surface as described in Site Preparation.

   • Start at either end of the line-up and realign each door individually as required.

   • Ensure that the top of each door is level with the adjacent doors.

   • Ensure equal space between adjacent doors to allow them to swing freely.

   • Ensure the doors are aligned in exact or uniform appearance.

   • Adjust door stops to allow a door swing of approximately 110°.

   • Once the doors are properly aligned, the doors of the outdoor switch must be tightly sealed all around the entire gasket.

2. Close and latch the door, then check the seal with a card (3 x 5 in. card, shipping tag – for example, an IBM card or similar) around the edge of the door. If the card can pass between the door and gasket, the door is not properly adjusted. Readjust the door so that the card no longer passes between the door and gasket.

The fuses provided by Schneider Electric should be installed following the switch equipment installation process. The installer is responsible for the proper installation of fuses, holders, fittings, etc.

DANGER
HaZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Do not perform fuse installation or replacement on energized equipment. Failure to follow these instructions will result in death or serious injury.

• Ensure that all fuses, holders, etc. are correctly installed and secured.

• Ensure that all fuses are latched/locked in place if latching/locking style fuses are provided.

Refer to the relevant fuse instruction manuals for detailed assembly and installation instructions.

Interlocks should be checked for proper operation before power is applied to the switchgear. Check the access interlock to ensure that:

• The power fuses cannot be accessed unless the interrupter switch is open.

• The interrupter switch cannot be closed while the power fuses are accessible.

DANGER
HaZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Properly destroy extra interlock keys (when supplied), or store them in a secure location. Make extra interlock keys accessible only to appropriate personnel. Do not modify or alter interlocks. Failure to follow these instructions will result in death or serious injury.

Before placing the equipment into operation, see Load Break Interrupter Switch 600–1200 A, and consult the drawings for proper operating sequence.

The load break interrupter switch is equipped with a mechanical device that blocks access to a closed switch.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA® 70E® Standard for Electrical Safety in the Workplace®, NOM-029-STPS, Maintenance of Electrical Installations in the Workplace – Safety Conditions, or CSA Z462 or local equivalent. Only qualified personnel familiar with power switch equipment are to perform work described in this set of instructions. Workers must understand the hazards involved in working with or near power switch circuits. Perform such work only after reading and understanding all of the instructions contained in this bulletin. Turn off all power supplying this equipment before working on or inside the equipment. Always use a properly rated voltage sensing device to confirm power is off. Before performing visual inspections, tests, or maintenance on the equipment, disconnect all sources of electric power. Assume that all circuits are live until they have been completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power, including the possibility of backfeeding. More than one disconnector switch may be required to de-energize the equipment before servicing. Do not remove covers, open doors, or work on the equipment unless the power is off and all circuits are de-energized and disconnected. Handle this equipment carefully and install, operate, and maintain it correctly in order for it to function properly. Do not make any modifications to the equipment or operate the system with the interlocks removed. Contact your local field sales representative for additional instruction if the equipment does not function as described in this manual or if parts are missing or damaged. Comply with all codes, standards, and regulations to promote safe electrical installations. A permit may be needed to do electrical work, and some codes may require an inspection of the electrical work. Carefully inspect your work area and remove any tools and objects left inside the equipment. Replace all devices, doors, and covers before turning on power to this equipment. All instructions in this manual are written with the assumption that the customer has taken these measures before performing maintenance or testing. Failure to follow these instructions will result in death or serious injury.

• Care should be taken to help prevent the MEI (Metal-Enclosed Interrupter) switchgear equipment from being energized by the power system during preliminary tests.

• If an upstream disconnecting means is not available, line leads should be disconnected.

• All internal connections should be examined to ensure that they have not been loosened or damaged during shipment or installation, and all bolted connections and joints should be tightened to ensure good contact.

• If spring washers are used under bolt head and nuts, they should be tightened in accordance with the provided equipment drawings.

• All wiring connections should be checked for tightness, including those at instrument transformers and all terminal blocks.

• Current transformer (CT) shorting devices on all active circuits should be removed when connected to an appropriate load.

• The integrity of control circuits should be checked with an ohmmeter to ensure against short circuits in the control wiring.

• Perform a power frequency withstand test on the power circuit, such as the bus and interrupter switch.

• After the MEI switchgear equipment has been installed and all interconnection completed, any control schemes should be operationally tested, and power connections given a final check for phase rotation and sequence before the switchgear is finally energized for service.

Carefully read and follow the instructions and safety precautions listed in this document. Operate at least 15 open/close operations and observe for proper performance prior to energizing.

WARNING
Overvoltage to control and protective components Disconnect all control and protective devices that may become damaged when conducting high-potential tests or insulation resistance tests. Consult the factory drawings to determine which devices must be disconnected from the circuit. Failure to follow these instructions can result in death, serious injury, or equipment damage.

DANGER

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS-2011, or CSA Z462 or local equivalent. Only qualified personnel familiar with power switch equipment are to perform work described in this set of instructions. Workers must understand the hazards involved in working with or near power switch circuits. Perform such work only after reading and understanding all of the instructions contained in this bulletin. Turn off all power supplying this equipment before working on or inside the equipment. Always use a properly rated voltage sensing device to confirm power is off. Before performing visual inspections, tests, or maintenance on the equipment, disconnect all sources of electric power. Assume that all circuits are live until they have been completely de-energized, tested, grounded, and tagged. Pay particular attention to the design of the power system. Consider all sources of power, including the possibility of backfeeding. More than one disconnector switch may be required to de-energize the equipment before servicing. Do not remove covers, open doors, or work on the equipment unless the power is off and all circuits are de-energized and disconnected. Handle this equipment carefully and install, operate, and maintain it correctly in order for it to function properly. Do not make any modifications to the equipment or operate the system with the interlocks removed. Contact your local field sales representative for additional instruction if the equipment does not function as described in this manual or if parts are missing or damaged. Comply with all codes, standards, and regulations to promote safe electrical installations. A permit may be needed to do electrical work, and some codes may require an inspection of the electrical work. Carefully inspect your work area and remove any tools and objects left inside the equipment. Replace all devices, doors, and covers before turning on power to this equipment. All instructions in this manual are written with the assumption that the customer has taken these measures before performing maintenance or testing. Failure to follow these instructions will result in death or serious injury.

After installing the equipment and making all connections, inspect and test the equipment before placing it in service.

• Ensure that no foreign materials, tools, or any other objects are placed on or near high voltage parts by performing the following:

  • Vacuum the floors to remove all debris.

  • Do not use compressed air to blow dust or debris from surfaces inside the controller.

  • Wipe and clean all barriers, bus insulators, bushings, and switch with a clean cloth dampened with either denatured or isopropyl alcohol. Then, wipe with a clean dry cloth.

  • Clean the control surface components and amorphous (Lexan) plastic covers and barriers with a clean cloth dampened with distilled or purified water. Then, wipe with a clean dry cloth. Do not use alcohol on these surfaces.

Although the equipment and devices have been tested at the factory, perform a final field test. Check the equipment to ensure it is properly installed and that all connections are correct and have not become loose during transportation.

DANGER
HaZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH Apply appropriate personal protective equipment (PPE) and follow safe electrical work practices. See NFPA 70E, NOM-029-STPS-2011, or CSA Z462 or local equivalent. Ensure that there is no backfeed through the main circuit. Failure to follow these instructions will result in death or serious injury.

To test devices such as relays and meters, refer to the manual for each device. Specific instruction manuals are provided that describes operating sequences for each device, including complicated automatic equipment.

• When transformers are provided to supply the control power, select the primary taps to obtain the control voltage indicated on the wiring diagram on the secondary of the transformer.

• When a battery supplies the control power, the cables from the battery to the switch must be large enough to avoid excessive voltage drop.

Perform a one minute high potential test on the primary circuit, busing and interrupter switch, at a field test value of either 14 kV AC or 20 kV DC.