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.

Power wiring refers to wires/cables connected to the line and load terminals that normally carry 2200–7200 Vac. When selecting power wiring:

• Use only cables that meets UL or CSA requirements

• Grounding must be in accordance with NEC, CEC or local codes. If multiple devices are installed near each other, each must be grounded. Make sure not to form a ground loop. The grounds should be connected in a star configuration.

Control wiring refers to wires connected to the control terminal strip that normally carry 24–115 V.

Signal wiring refers to wires connected to the control terminal strip with low voltage signals (below 15 V).

• Wires should be shielded/armour to help prevent electrical noise interference, which can cause improper operation or nuisance tripping.

• Signal wiring inside the enclosure should routed to maintain maximum separation as feasibly possibly from control and power wiring.

• Use signal wiring with the highest possible voltage rating (at least 300 V rating).

To access the isolation section compartment, follow these steps:

1. If an optional keylock is provided, use the key to unlock the isolation section cover.

2. Remove the disconnector switch operator handled from the cover.

   Disconnector Switch Operator Handles

   

3. Remove the four bolts attaching the isolation section cover to the unit and set aside.

   Isolation Section Cover

   

4. Remove the cover and set it aside.

5. When reversing the above steps to install the medium voltage isolation section cover, make sure to fully tighten the bolts on the cover, tighten the hardware attaching the operator handle, and lock the cover 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. Using a screwdriver or nut driver, loosen the screws on the door closure brackets and slide the door closure brackets off the door flange tabs.

   Medium Voltage Door Locking Brackets

   

3. The medium voltage door can now be opened.

4. When reversing the above steps to close the medium voltage door, make sure to slide brackets over the door flange tabs before fully tightening the door closure bracket screws 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. Remove the screws in the upper and lower right corner of the medium voltage door.

   Medium Voltage Door

   

3. Lift and rotate the lift and turn latch 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).

To access the low voltage compartment, follow these steps:

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

2. Using a screwdriver or nut driver, loosen the screws on the door closure brackets and slide the door closure brackets off the door flange tabs.

   Low Voltage Door Locking Brackets

   

3. The low voltage door can now be opened.

4. When reversing the above steps to close the low voltage door, make sure to slide brackets over the door flange tabs before fully tightening the door closure bracket screws and lock the door lock, if a keylock option is included.

To access the low voltage compartment follow these steps:

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

2. Rotate the door locking knobs 90 degrees.

3. The low voltage door can now be opened.

4. When reversing the above steps to close the low voltage door, make sure to rotate the door locking knobs back to their original positions and lock the door lock, if a keylock option is included.

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

• It is important that the MotorSeT equipment 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 with a lint-free cloth. 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 the disconnector switch.

Busbar Connections

Power wire (cable) should be selected based on the FLA of the load. Wire derating may be necessary based on ambient temperatures.

For assistance in selecting the correct wire size, consult local and national codes.

DANGER

HAZARD OF ELECTRICAL SHOCK, EXPLOSION, OR ARC FLASH Verify unsheilded, full voltage rated insulated cables do not contact any ground metal parts or other phase cables. If boots are required, the boots will be shown on the job drawings and supplied with the equipment. Use the shortest possible length bolts when connecting medium voltage lugs to contactor, disconnector switch, or lug pads. Install bolts so that threaded end of bolts (nut side) from different phases are not pointing toward each other. Failure to follow these instructions will result in death or serious injury.

To connect the line side and load side power cables, follow these steps:

1. Route the power cables through a connector into the enclosure.

2. Strip the cable insulation from the end of cable per the lug manufacturer's instructions.

3. If recommended by the lug manufacturer, apply anti oxidation paste to the cable prior to crimping lug to cable.

4. Connect the motor load cables to the T1, T2 and T3 lugs or terminals.

5. Connect the power source cables to the L1, L2 and L3 lugs or terminals.

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.

The fuses provided by Schneider Electric should be installed following the 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.

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

• Verify 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 motor controller equipment. Check the access interlock to verify that:

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

• The disconnector 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 Operation, 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. In addition, the load break interrupter switch must be opened before the medium voltage door can be opened.