Siemens TIASTAR User manual

INSTRUCTION MANUAL
tiastar™
Motor Control Centers
usa.siemens.com/mcc

Signal words
The signal words “DANGER”, “WARNING” and
“CAUTION” used in this manual indicate the degree
of hazard that may be encountered by the user.
These words are defined as:
For the purpose of this manual and product labels,
DANGER indicates an imminently hazardous
situation which, if not avoided will result in death
or serious injury.
For the purpose of this manual and product labels,
WARNING indicates a potentially hazardous
situation which, if not avoided, could result in death
or serious injury.
For the purpose of this manual and product labels,
CAUTION indicates a potentially hazardous situation
which, if not avoided, may result in minor or
moderate injury.
Qualified person
For the purposes of this manual and product labels,
a qualified person is one who is familiar with the
installation, construction, operation or maintenance
of the equipment and the hazards involved. In
addition this person has the following qualifications:
(a) is trained and authorized to energize,
de-energize, clear, ground and tag circuits and
equipment in accordance with established
safety practices.
(b) is trained in the proper care and use of
protective equipment such as rubber gloves,
hard hat, safety glasses or face shields, flash
clothing, etc., in accordance with established
safety practices.
(c) is trained in rendering first aid.
This equipment contains hazardous voltages. Death, serious personal injury, or property
damage can result if safety instructions are not followed. Only qualified personnel should work
on or around this equipment after becoming thoroughly familiar with all warnings, safety
notices, and maintenance procedures contained herein.
The successful and safe operation of this equipment is dependent upon proper handling,
installation, operation and maintenance.
Hazardous voltage.
Will cause death or serious injury.
Always de-energize and ground the equipment before
maintenance. Read and understand this manual before
installing, operating or maintaining the equipment.
Maintenance should be performed only by qualified
personnel. The use of unauthorized parts in the repair of
the equipment or tampering by unqualified personnel
may result in dangerous conditions which may cause
death or serious injury, or equipment or property
damage. Follow all safety instructions contained herein.
tiastar™ Motor Control Centers Instruction Manual


General information
. Parts illustrations -
Receiving and handling
. Receiving 
. Handling -
. Skid removal 
. Storage 
Installation
. Installation quick check list 
. Operating environment 
. Site preparation 
. Mounting -
. Top and bottom covers 
. Installation of seismic qualified structures 
. Joining shipping sections 
. Ground bus 
. Splice kits 
. Pull box installation 
. Incoming power connections -
. Incoming line termination arrangements,
main lugs -
. Incoming line termination arrangements,
main circuit breakers -
. Incoming line termination arrangements,
main fusible switches -
. Load and control wiring 
. Field additions 
. Plug-in unit removal -
. Plug-in unit addition -
. High density unit installation -
. Insulation (Megger) test -
Operation
. Pre-energization checks -
. Energizing equipment 
. Permissible loading of motor control centers 
Maintenance
. Maintenance quick check -
. General inspection of the MCC -
. Periodic cleaning 
. Stab fingers and vertical bus 
. Recommended tightening torques 
. Disconnect operating handle adjustment -
. Adjustment notes 
. Maintenance after a fault has occurred 
. Disconnecting means -
. Terminals of internal conductors 
. Adjustment of Sentron type ETI instantaneous
trip motor circuit interrupter ( A- A) 
. Field testing of the circuit breakers 
. Overlay relay 
Troubleshooting
Troubleshooting -
Heater tables
Heater tables -
Disposal
Disposal 
Important
These instructions do not purport to cover all details or variations in equipment, nor to provide for every possible contingency to be met in connection
with installation, operation or maintenance. Should further information be desired or should particular problems arise which are not covered sufficiently
for the purchaser’s purposes, the matter should be referred to the local Siemens sales office. The contents of this instruction manual shall not become
part of or modify any prior or existing agreement, commitment or relationship. The sales contract contains the entire obligation of Siemens. The
warranty contained in the contract between the parties is the sole warranty of Siemens. Any statements contained herein do not create new warranties
or modify the existing warranty.
Arc Resistant Equipment Special Considerations:
For Arc Resistant Equipment, see also the supplemental Instruction and Installation Guide for Type A Arc Resistant Motor Control Center
E-A-T-A-MCC.
Table of contents
tiastar™ Motor Control Centers Instruction Manual


General information
Key to section construction features
. Rear brace
. Side sheet assembly
(on outer of motor control centers)
. Bottom wireway
 Front bottom base channel
. Channel sills
. Top wireway
1
2
3
4
5
6
12
8
9
13
10
7
14
15
16
Standard bus
11
. Horizontal bus
. Vertical bus,  A,  A, and  A
. Horizontal ground bus
. Divider side sheet assembly
(between adjoining sections)
. Horizontal bus support
. Standard vertical bus brace
. Horizontal bus support (rear view)
. Standard vertical bus barrier
. Unit stab holes
. Unit support assembly
. Parts illustrations
tiastar™ Motor Control Centers Instruction Manual General information


11
19
13
15
Optional insulated vertical bus
7
18
17
24
23
22
21
25
20
Key to section construction features (continued)
. Wiretie support
. Vertical wireway
. Removable door hinge
. Vertical wireway door
. Bottom horizontal wireway (”) and formed cover plate
. Bottom end cover plate
. Top horizontal wireway and floor (wireway ” high)
. Top plates
. Lifting angle
. Parts illustrations (continued)
tiastar™ Motor Control Centers Instruction Manual General information


Receiving and handling
. Receiving
Upon receipt of the motor control center, an
immediate inspection should be made for any
damage which may have occurred during shipment.
The inspection should begin with the packaging
material and proceed to the equipment within.
Be sure to look for concealed damage and do not
discard the packing material. If damage is found,
note damage on “Bill of lading” prior to accepting
receipt of the shipment, if possible.
Note: The way visible shipping damage is treated by
the consignee prior to signing the delivery receipt can
determine the outcome of the damage claim to be
filed. Notification to the carrier within the  day limit
on concealed damage is essential if loss resulting from
unsettled claims is to be eliminated or minimized.
The Siemens sales office should be notified
immediately if damage or loss is discovered. A
description of the damage and as much identification
information as possible should be given.
. Handling
The motor control centers are shipped in groups of
one to four vertical frames which are mounted on
wooden shipping skids.
For lifting the shipping group from the bottom, the
fork lift or pallet jack must be inserted in either end
under the pallet and not the front or rear, as shown
in Figure . A narrow fork pallet jack (” width or
less) is recommended.
The lifting angles for each shipping group is attached
to the associated wooden shipping skid. For lifting
the shipping groups with a crane, as shown in Figure ,
the lifting angle must be removed from the skid and
mounted to the top of associated shipping group.
A /“ wrench/socket can be used to secure the
lifting angle using the /“ bolts provided on top of
the assembly.
Note: Refer to section .. for the recommended
tightening torque requirements.
. Handle the motor control center with care to
avoid damage to components and to the frame
or its finish.
. Handle the motor control center in an upright
position only. Motor control centers are normally
front heavy and frequently top heavy. Balance the
load carefully and steady the motor control center,
as necessary, while moving. Some motor control
center interiors may contain heavy equipment,
such as transformers mounted within, that could
be adversely affected by tilting.
. Know the capabilities of the moving means
available to handle the weight of the motor control
center. Adequate handling facilities should be
available. The following table gives the
approximate weights of single vertical frames and
will be helpful in determining the required capacity
of the handling means. If a vertical frame contains
power factor correction capacitors, reactors, or a
large transformer, sufficient additional weight
handling capacity must be allowed.
NEMA , Gasketed, and  structures only
Heavy equipment.
Can cause death or serious
personal injury.
Exercise extreme care when handling
the motor control center. Handle
upright only. Do not tilt. A crane or
hoist should be used if at all possible.
Exercise all safety pre-cautions
outlined in the following discussion.
Frame Weight
20" (508 mm) W x 15" (381 mm) D front only 550 lb.
20" (508 mm W x 20" (508 mm) D front only 600 lb.
30" (762 mm) W x 15" (381 mm) D front only 600 lb.
30" (762 mm) W x 20" (508 mm) D front only 650 lb.
tiastar™ Motor Control Centers Instruction Manual Receiving and handling


. It is recommended that a crane or hoist be used to
handle the MCC if at all possible. If a crane or
hoist is not available and other handling means
are necessary, extreme care must be exercised to
ensure that the equipment is secured during the
movement and placement operations to prevent
tipping and falling. Jacks, prybars, dollies, roller
lifts, and similar devices all require supplementary
blocking beneath the MCC and restraints to prevent
tipping. These devices are not recommended due
to the hazards implicit in their use.
Heavy equipment.
Can cause death or serious
personal injury.
Exercise extreme care when handling
the motor control center. Handle
upright only. Do not tilt. A crane or
hoist should be used if at all possible.
Exercise all safety pre-cautions
outlined in the following discussion.
The following precautions should be taken when
moving an MCC with a crane or hoist:
. Select rigging lengths to compensate for any
unequal weight distribution and to maintain the
motor control center in an upright position.
. Spreader bar should be used in conjunction with
lifting cables to provide vertical lift on lifting angle
to avoid angle failure or crushing or both.
Spreader base is not furnished with equipment.
. Do not allow the angle between the lifting cables
and vertical to exceed ° as shown in Figure .
. Do not pass ropes or cables through lifting
brackets. Use only slings with safety hooks or
shackles.
. Never lift an MCC above an area where personnel
are located.
Note: The height of the lift point above the spreader
bar should be at least one half “A,” the distance
between lift holes. This assures a safe angle of
 degrees or less.
Figure : Lifting a motor control center
with an overhead crane.
Figure : Proper method for lifting a motor
control center
Lift point
One-half
“A”
or more
Never exceed
45 °
Lifting angle
Lifting
hole
Lifting
hole
“A”
Figure : Load rated safety hook and shackle
Figure : Motor Control Center, roller, and forklift handling
tiastar™ Motor Control Centers Instruction Manual Receiving and handling


The following precautions should be taken when
moving an MCC with a forklift:
. Make sure the load is properly balanced on the
forks.
. Place protective material between the MCC and
forklift to prevent bending and scratching.
. Securely strap the MCC to the forklift to prevent
shifting or tipping.
. Excessive speeds and sudden starts, stops, and
turns must be avoided when handling the MCC.
. Lift the MCC only high enough to clear
obstructions on the floor.
. Take care to avoid collisions with structures, other
equipment,or personnel when moving the MCC.
. Never lift an MCC above an area where personnel
are located.
The following precautions should be taken when
moving an MCC by rolling on pipes:
. Use enough people and restraining devices to
prevent tipping.
. The surface over which the MCC is rolled must be
level, clean and free of obstructions. NEVER ROLL
AN MCC ON AN INCLINED SURFACE.
. It should be recognized that rolling an MCC is
especially hazardous to fingers, hands, and feet
and is susceptible to tipping. Measures should be
taken to eliminate these hazards.
. All pipes must be the same outside diameter and
should have no flat spots. Only steel pipe should
be used for this purpose.
Heavy equipment.
Can cause death or serious
personal injury.
Exercise extreme care when handling
the motor control center. Handle
upright only. Do not tilt. A crane or
hoist should be used if at all possible.
Exercise all safety pre-cautions
outlined in the following discussion.
. Skid removal
Skid removal should be performed just prior to
final placement of the motor control center and is
achieved by first removing the bottom horizontal
wireway covers which allows access to the skid lag
bolts. Attach crane rigging to lifting angle on top
of MCC structure. Apply sufficient tension on the
rigging to remove all slack without lifting the
equipment. This is a recommended safety measure
to reduce the possibility of tipping. The lag bolts may
now be removed, the MCC lifted, the skids removed,
the MCC lowered into place, and the anchor bolts
secured. The last operation should be performed
with adequate rigging tension to prevent tipping.
After all additional shipping sections are secured in
a similar manner, sections and bus bars should be
joined in accordance with the instructions in the
Installation section of this manual. Close doors
and reinstall covers as soon as possible to eliminate
intrusion of dirt and foreign materials into the
MCC enclosure.
. Storage
A motor control center or separate unit, which is
not installed and energized immediately, should
be stored in a clean dry space where a uniform
temperature prevents condensation. Preferably, it
should be stored in a heated building, with adequate
air circulation and protected from dirt and water.
Motor control centers and units should be stored
where they are not subject to mechanical damage.
If the motor control center is to be stored for any
length of time, prior to installation, restore the
packing for protection during that period. Where
conditions permit, leave the packing intact until the
motor control center or sections are at their final
installation position. If the packing is removed, cover
the top and openings of the equipment during the
construction period to protect them against dust
and debris.
If the equipment is to be stored in a cool or damp
area, do not completely cover the equipment, but
provide heat to prevent condensation of moisture
in the equipment. If the control center has been
ordered with space heaters, connect to a temporary
feed for heat. A simple method of heating the motor
control center when space heaters are not ordered is
to place a standard V/W lamp inside the bottom
of each vertical section.
An unenergized outdoor motor control center
should be kept dry internally by installing temporary
heating (see previous paragraphs), or by energizing
optional self-contained space heaters.
Any scratches or gouges suffered from shipping or
handling should be touched up to prevent rusting.
tiastar™ Motor Control Centers Instruction Manual Receiving and handling


Installation
. Installation quick check list – indoor MCCs only
Receiving
¨Inspect package for damage.
¨After unpacking, inspect equipment for damage in transit.
¨If damaged or incomplete, please notify Siemens sales
office with identification of parts, description of damage,
and photographs.
Handling
¨Simplify handling by leaving equipment on shipping skid.
¨Use the lifting angle provided for moving the equipment.
¨Take care to use the proper method of moving a motor
control center.
Storage
¨Store in a clean, dry space at moderate temperature.
¨Cover with a canvas or heavy-duty plastic cover.
¨If storage area is cool or damp, cover equipment
completely and heat to prevent condensation.
Location selection
¨Flat and level floor.
¨Overhead clearance.
¨Accessibility front and rear (if required).
¨Protection from splash and drip, dust, and heat.
¨Space for future expansion.
¨If bottom conduit entry is used, conduit should be
in place and stubbed up before equipment is installed.
Installation method
¨Grout into the foundation.
¨Weld channel sills to steel leveling plates.
¨Imbedded anchor bolts in the floor.
Field assembly
(Instruction sheet included with shipment)
¨Remove hardware and horizontal bus connecting
links from shipping splits.
¨Install first shipping split.
¨Remove end cover plates of structures to be joined
(if required).
¨Carefully align second split with first. Bolt structures
together at four corners and middle, front, and rear.
¨Remove horizontal wireway barrier to expose horizontal bus.
¨Connect horizontal buses with bus links.
Torque bolts to 20 lbf-ft
¨Grommet top and bottom horizontal wireways.
¨Install heater coils.
(Check selection against motor nameplate data.)
¨Install fuses.
Conduit entry at top
¨Remove top plates from structure.
¨Cut conduit entry holes in top plates.
¨Reinstall top plates.
¨Install conduits
Incoming line connections
¨Choose the shortest, most direct route from remote mains.
¨If cables cannot be directly routed to terminals, provide
adequate space for clamping the cables.
¨Torque incoming lines to main lugs only at 85 lbf-ft
¨Torque all incoming connections to main circuit breakers
and fusible disconnects as per the breaker or disconnect
manufacturer’s recommendations. The torque requirements
are found on a label located on the disconnecting device.
Outgoing power and control wiring
¨Disengage plug-in unit stabs from vertical bus.
Connect control and power wiring to units.
¨Use stranded wire.
¨Leave enough slack to permit partial withdrawal of
unit to test position for maintenance.
¨Pull wiring between units through vertical and horizontal
wireway securing wires in the vertical wireway with wire
from wire ties provided.
¨Route wiring between sections through the top or bottom
horizontal wireways.
¨Reinsert plug-in units to engage stabs.
Pre-operation checks
¨Test insulation resistance of all circuits with the control
center as ground.
¨Remove restraining devices from contactors and shunts
from current transformers. Make sure that all parts of
magnetic devices operate freely.
¨Check electrical interlocks for proper contact operation.
¨Make sure that each motor is connected to its
proper starter.
¨Check all timers for proper time interval setting and
contact operation.
¨Check fusible disconnect starters for proper fuse size.
¨Clean the control center. Rid it of all extraneous material.
Use a vacuum cleaner, not compressed air.
¨Check all connections for mechanical and electrical
tightness.
¨Close all access plates and doors.
Energizing motor control centers
¨Make sure all unit disconnect handles and control center
mains are turned to OFF.
¨Turn on remote mains.
¨Turn on motor control center main circuit breakers or
fusible disconnects.
¨Turn on unit disconnect handles one by one.
¨Jog motors to check for proper rotation.
¨Adjust ETI breakers.
Insulation (Megger) test (see page 27)
Note: This checklist is not exhaustive and particular applications
may require further procedures.
tiastar™ Motor Control Centers Instruction Manual Installation


. Operating environment
The motor control center conforms with the
provisions of NEMA Standard ICS , Altitude Class
KM which defines the usual service condition for
electromagnetic control. It is designed for indoor
use where the temperature inside the control center
is higher than the ambient temperature. The control
center is capable of carrying its rated load when the
ambient temperature does not exceed  °C and the
altitude does not exceed , feet above sea level.
Where unusual service conditions exist or where
temperature or altitude limitations are exceeded,
the control center construction, ratings, or
protection may require alteration. Some examples
of unusual service conditions are excessive
moisture, vibration, or dust.
. Site preparation
Installation shall be in accordance with the National
Electrical Code, ANSI, and NFPA  Standards. Unless
the motor control center has been designed for
unusual service conditions, it should not be located
where it will be exposed to ambient temperatures
above  °C ( °F), corrosive or explosive fumes,
dust, vapors, dripping or standing water, abnormal
vibration, shock or tilting, or other unusual
operating conditions.
The motor control center should be installed in a
clean, dry, heated place with good ventilation
and it should be readily accessible for scheduled
maintenance. A flat, level, concrete surface should
be prepared for the mounting site. If the mounting
site is not flat and level, the motor control center
must be shimmed where necessary to prevent
distortion of the structure.
All conduit entering from the bottom should be in
place and stubbed up about two inches above the
finished floor level before installing the control
center. Refer to the MCC lead sheet plan view
located in the information packet for specific
conduit area dimensions.
Note: Conduit should not extend more than
 / inches above the floor surface.
Figure : Top conduit entry: ” ”
. Mounting
Motor control centers may be mounted by many
different fastening systems including true drop in,
cast in place, powder actuated, or threaded insert
fasteners. See Figure  for anchor bolt locations.
The bolt pattern is dependent on frame width,
depth, location in the line-up. Refer to the structure
mounting detail included on the L layout drawing
lead sheet. The coordination between bolts and the
MCC should be verified prior to attempting
installation. Expandable inserts in predrilled holes
or embedded ‘L’ bolts are recommended.
Wooden plugs driven into holes in masonry or
concrete are not recommended for anchoring inserts
and should never be used. The bolt size must be /”.
Grouting the sill channels is another method of
fastening. This method requires the foundation to
be grooved as shown to accept the sill channels.
See Figure  for details.
Welding the steel base or sill channels to a steel floor
plate is an alternate mounting method. See Figure 
for details.
(175 mm) (175 mm)
(176 mm)
6
H/i
BF/bg
Wireway
door Wireway
door
Openings with removable
cover plates (typ.)
Openings with removable
cover plates (typ.)
Unit
door
Unit
door
15”
(381 mm)
deep (3) 4” (102 mm) or
(4) 3” (76 mm)
conduits
(3) 4” (102 mm) or
(4) 3” (76 mm)
conduits
(5) 2” (51 mm)
conduits
20”
(508 mm)
deep
6H/i
17”
(432 mm)
17”
(432 mm)
6
Note:
Rear top plate can be used for conduit on ” ( mm) deep MCC.
Cables can then be run from rear to front through optional wireway
holes to connect units.
This is an example only and should not be used for construction.
Refer to the drawing package supplied with the MCC for conduit and
mounting information for specific MCC.
All dimensions shown in inches.
tiastar™ Motor Control Centers Instruction Manual Installation


Figure : Anchor bolt location and bottom conduit entry: ” ”
20”
(508 mm)
(508 mm)
(297 mm) (246 mm)
20”
17”
17
3”
3”(76)
3”(76)
2¼
19
(500 mm)
(76)
3”(76)
(348 mm)
(348 mm)
(373 mm)
13
16
Mounting
holes
(Typ.)
1½”(38 mm)
(Typ.)
1½”(38 mm)
Vertical bus
14
Space open for
conduit entry
Space open for
conduit entry
11
5¼”
8
14½”
2¼ 5¼”14½”
Vertical bus
Typical
9
6
Channel sill
Channel sill Remove bottom unit to pull wire.
BB/bg”
BB/bg”
BB/bg”
BB/bg”BB/bg”BB/bg”BB/bg”
F/i”
(221 mm)
(133 mm)
(168 mm)
(368 mm)(57 mm)
(133 mm)(368 mm)(57 mm)
A
A
6”
3”
(76 mm) (152 mm)
Typ. (4) corners Typ. (4) places
Bottom filler
MCC frame
Steel
.12
floor plate
Motor
control
center
Sill
channel
Grooves
Figure : Grouting method of fastening MCC
Figure : Welded installation
Reversible bottom end-cover plates cover the bottom
horizontal wireway, ground bus opening, and the
end channels. They perform this function if the
section is mounted on its sills, or if the section with
sills is grouted into the floor, the plates are simply
rotated °. See Figure .
If the control center is located on structural steel
platforms over grids, it is recommended that the
center be modified with bottom plates.
Note: To comply with NEC -(a) Height
Requirements, the customer should ascertain that
the operating personnel’s working base is at the
same level as the MCC base.
. Top and bottom covers
Top covers are provided on all motor control centers
as an integral part of the enclosure. Bottom covers
are supplied on certain types of construction such as
NEMA . These covers should be removed only for
the purpose of piercing holes for conduit or wire
entry and must be immediately replaced to reduce
the possibility that falling material, tools, or
personnel could unintentionally contact the bus
system or other live parts.
A
A
6”
3”
(76 mm) (152 mm)
Typ. (4) corners Typ. (4) places
Bottom filler
MCC frame
Steel
.12
floor plate
Figure : Reversible bottom end-cover plates
Note: This is an example only, not for construction. Customer to refer
to drawing package supplied with the MCC for conduit and mounting
information for their specific MCC.
All dimensions shown in inches unless otherwise specified.
Shaded area indicates conduit entry.
All dimensions are shown in inches unless otherwise specified.
tiastar™ Motor Control Centers Instruction Manual Installation


. Installation of seismic
qualified structures
Siemens tiastar MCCs are qualified to withstand
seismic activity as specified in IBC , CBC ,
IBC , CBC  and IEEE . This includes
all tiastar MCCs, all NEMA types and MCC sizes.
tiastar MCCs are rated at importance factor ..
The seismic qualifications include mounting
locations from ground level to roof top.
The motor control center should be anchored to
the floor with appropriate hardware and /” bolts.
For seismically qualified MCC installations, all
mounting holes supplied in the standard base
channel sills must be used. Welding is also an
acceptable method of mounting, if the installation
instructions are followed.
) Importance factor . identifies components whose
post-event operation is essential to supporting life,
safety, and/or if the components contain materials that
would be dangerous to building occupants if released
during an earthquake.
. Joining shipping sections
Shipping sections consist of up to four vertical
frames shipped as a single unit. It is often necessary
to join two or more shipping sections at the job site.
All necessary electrical and structural joining
components are provided and the following
procedures are recommended.
Note: Splice plates for horizontal bus are supplied in
a separate cardboard box. There is signage on the
MCC indicating where to find them.
. Position the first shipping section into place on
the foundation and level.
. Remove the front horizontal bus barrier and the
side covers (if applicable) from the end(s) to be
joined. If the rear is accessible, the back cover
plates should be removed from the two adjoining
sections.
Figure :  A and  A horizontal ground bus connection
Hazardous voltage.
Will cause death or serious
personal injury.
Turn off power before working on
this equipment.
Horizontal ground
bus bar
Ground bus bar
splice link
Taptite screw
MCC structure
steel member
Ground splice kit shipped bolted
to ground bus as shown.
. Position the second shipping section on the
foundation adjacent to the first and level it. The
horizontal bus should be inspected for proper
positioning and alignment at this time.
. Bolt structures together at six points (see
Figure ). If access to the rear of the structures
is restricted, the rear center bolt may be omitted.
. Assemble the bus bar links to join the horizontal
power bus and neutral bus, if supplied, in the two
shipping sections as shown on page . The
horizontal and neutral buses may differ in size,
therefore the links must be matched to the proper
bars. All links and associated mounting hardware
are provided with the motor control center.
. Torque all bus connections to  lbf-ft
. If the motor control center has interwiring,
connect the interunit wiring between shipping
sections.
. Join the ground bus between the two adjacent
sections. The Ground Bus Section in the manual
details this procedure.
. If there are other shipping sections to be joined,
repeat steps  through  above.
. Secure the motor control center to the
foundation.
. NEMA R enclosure sections should be securely
joined and sealed to prohibit intrusion of dust
and moisture.
. Ground bus
All hardware and links are supplied for joining the
ground bus between two shipping sections. This
joining may be accomplished by loosening the screw
securing the connection link so that the link pivots
freely. Remove the screw securing the ground bus in
the adjacent frame to which the link will attach.
Pivot the free end of the link such that the hole is
aligned with the bolt, then reassemble the screw and
link assembly. Tighten hardware. See Figure .
tiastar™ Motor Control Centers Instruction Manual Installation


Figure 
Note:
Do not use grommets on the back horizontal
wireway openings of ‘front only’ sections.
All dimensions are shown in inches unless otherwise specified.
tiastar™ Motor Control Centers Instruction Manual Installation


. Splice kits
Note: For complete splice kit installation details, refer to instructions supplied with splice kits.
Horizontal
bus splice
Splice bar adapter
Parallel horizontal
Belleville washer
Bolts
Bus bar
clamp
Horizontal
bus splice
Parallel horizontal
bus bar (L2 & L3)
Belleville washer nut
Belleville washer nut
Bus bar
clamp
Horizontal
bus bar
Horizontal
bus splice
Figure : , A, , A L connection
Figure : , A, , A L and L connection
, A, , A neutral bus connection
Figure :  A,  A main bus connection
 A,  A neutral bus connection
 A horizontal ground bus connection
tiastar™ Motor Control Centers Instruction Manual Installation


. Pull box installation
Refer to Figure  for the following procedure.
. Remove top front conduit plate (A) from
motor control center structure by removing
two screws (B). There are two front plates on
back-to-back motor control centers.
. Remove two rear screws (C).
. Remove the top two screws holding on the bus
insulator cover (E). Do this to both sides of a
back-to-back motor control center.
. Install barrier (F) and replace the screws from
step .
. Remove top plate of pull box (G).
. Place pull box on MCC and screw down using
four / -  x /” taptite screws. The rear
mounting holes may have to be drilled on front
only motor control centers. Use the pull box/top
hat as a drilling template.
. Replace top plate that was removed in step five.
Hazardous voltage.
Will cause death or serious
personal injury.
Turn off power before working on
this equipment.
. Incoming power
connections
Note: Remove top covers before cutting holes for
conduit to prevent metal chips from falling into the
motor control center. Conduits should be carefully
installed to prevent moisture or water from entering
and accumulating within the enclosure. All conduits
(including stubs) should be bonded to the motor
control center. After all shipping sections are in
place, leveled, and joined together into a single
motor control center, cables may be pulled and top
entry conduit may be installed. Bottom entry conduit
will have been stubbed through the floor at the
proper locations prior to placement of the motor
control center. The incoming source cables may be
connected at this time, however, the power source
disconnecting means must remain open and locked
out until all wiring is completed and the entire
system has been checked out.
Care must be exercised to make sure that the lugs
which have been provided are suitable for use
with the type of cables being installed in the motor
control center. If crimp lugs are supplied, use only
the crimping tool recommended by the lug
manufacturer.
Care should be exercised in stripping insulation
from the conductors to prevent nicking the
conductor. Tighten all screw lugs and bolted
electrical connections to the specified torque listed
in the table in the maintenance section of this
instruction manual.
To minimize the length of unsupported cable,
the shortest, most direct routing should be chosen.
However, the largest practical bending radii should
be maintained to avoid damaging the insulation
and to avoid causing terminals to loosen. All
cables entering the motor control center must be
adequately supported and restrained to withstand
the maximum fault current capable of being
delivered by the source. The recommended distances
between straps for  pound rated strap is  inches
for  kA bracing,  inches for  kA bracing and
 inches for  kA bracing. Using a strap rated less
than  pounds will require the spacing distances
to be reduced. For  kA bracing, cables must
be supported in accordance with the special
instructions provided with the motor control center.
tiastar™ Motor Control Centers Instruction Manual Installation


Figure 
Top view
Top view
front top plate
removed
Front view
(top wireway door -
not shown)
Front view
(top wireway door -
not shown and
barrier E installed)
Pull box / top hat
MCC
Front
E
F
G
D
D
F
E
F
H
C
B
A
tiastar™ Motor Control Centers Instruction Manual Installation


. Incoming line termination arrangements – main lug only (MLO)
Horizontal lugs are available with  A, , A symmetrical bracing only (refer to Figure  on next page).
Special lugs, such as NEMA two-hole compression lugs, can be accommodated. Consult Siemens for space requirements.
Amperes / bracing
(A/K) Location Incoming cable size
Figure
reference
next page
Wire-bending spare
dimensions A
inches (mm)
Total assembly height
dimensions B
inches (mm)
Required unit space
dimensions C
inches (mm)
600/42 Top Quantity = 2
#4 - 350 kcmil Cu 16 13 (330) 12 (305) 0
600/42-65 Top Quantity = 2
#2 - 600 kcmil Cu 17 16 (406) 24 (610) 12 (305)
600/85-100 Top Quantity = 2
#2 - 600 kcmil Cu 18 20 (508) 30 (762) 18 (457)
600/421Bottom Quantity = 2
#4 - 350 kcmil Cu 19 13 (330) 18 (457) 12 (305)
600/651Bottom Quantity = 2
#4 - 350 kcmil Cu 19 13 (330) 24 (610) 18 (457)
800/42-65 Top Quantity = 2
#2 - 600 kcmil Cu 17 16 (406) 24 (610) 12 (305)
800/85-100 Top Quantity = 2
#2 - 600 kcmil Cu 18 20 (508) 30 (762) 18 (457)
800/42-652Bottom Quantity = 2
#2 - 600 kcmil Cu 20 18 (457) 30 (762) 24 (610)
1,200/42-100 Top Quantity = 3
#2 - 600 kcmil Cu 18 20 (508) 30 (762) 18 (457)
1,200/42-652Bottom Quantity = 3
#2 - 600 kcmil Cu 20 18 (457) 30 (762) 24 (610)
1,600/42-100 Top Quantity = 4
#2 - 600 kcmil Cu 18 20 (508) 30 (762) 18 (457)
1,600/42-652Bottom Quantity = 4
#2 - 600 kcmil Cu 20 18 (457) 30 (762) 24 (610)
2,000/42-1001Top Quantity = 6
#2 - 600 kcmil Cu 21 29 (737) 48 (1,219) 36 (914)
2,000/42-1002Bottom Quantity = 6
#2 - 600 kcmil Cu 22 46 (1,168) 72 (1,829) 72 (1,829)
2,500/42-1002Top Quantity = 6
#2 - 600 kcmil Cu 21 29 (737) 48 (1,219) 36 (914)
2,500/42-1002Bottom Quantity = 6
#2 - 600 kcmil Cu 22 46 (1,168) 72 (1,829) 72 (1,829)
. Space behind structure not available.
. Entire rear of structure not available.
. Optional lugs available. Contact factory for size and rating.
tiastar™ Motor Control Centers Instruction Manual Installation


All dimensions are shown in inches (mm) unless otherwise specified.
B
A
20
(508)
A
C
B
20
(508)
6 (152)
A
B
C
12
(305)
30
(762)
A
B
C
6 (152)
12
(305)
30
(762)
B
A
C
20
(508)
B
A
C
20
(508)
A
C
B
20
(508)
. Main lugs
Figure  Figure Figure  Figure 
Figure  Figure Figure 
tiastar™ Motor Control Centers Instruction Manual Installation


. Incoming line termination arrangements –main circuit breakers (MCB)
Molded-case, thermal-magnetic circuit breakers, molded-case, solid-state circuit breakers, and insulated case WL power circuit
breakers can be used as mains in the LV MCC. These circuit breakers are -percent rated. -percent rated options are also
available per the below.
Circuit Breaker
Frame A Location Incoming cable size
Figure
reference
next page
Wire-bending spare
dimensions A
inches (mm)
Total assembly height
dimensions B
inches (mm)
Required unit space
dimensions C
inches (mm)
125 Top Quantity = 15#3 - 3/0 Cu 23 14 (356) 24 (610) 12 (305)
125 Bottom Quantity = 15#3 - 3/0 Cu 26 8 (203) 24 (610) 18 (457)
250 Top Quantity = 1 #6 - 350 kcmil Cu 24 15 (381) 30 (762) 18 (457)
250 Bottom Quantity = 1 #6 - 350 kcmil Cu 27 15 (381) 36 (914) 30 (762)
4007,8 Top Quantity = 1 #6 - 350 kcmil Cu 24 15 (381) 30 (762) 18 (457)
4007,8 Bottom Quantity = 2 3/0 - 500 kcmil Cu 28 15 (381) 42 (1,067) 36 (914)
6007,8 Top Quantity = 2 3/0 - 500 kcmil Cu 24 15 (381) 30 (762) 18 (457)
6007,8 Bottom Quantity = 2 3/0 - 500 kcmil Cu 28 15 (381) 42 (1,067) 36 (914)
8001,8 Top Quantity = 3 #1 - 500 kcmil Cu 25 22 (559) 48 (1,219) 36 (914)
8002,6,8 Bottom Quantity = 3 #1 - 500 kcmil Cu 29 22 (559) 54 (1,372) 48 (1,219)
1,2001,8 Top Quantity = 4 250 - 500 kcmil Cu 25 22 (559) 48 (1,219) 36 (914)
1,2002,3,6,8 Bottom Quantity = 4 250 - 500 kcmil Cu 29 22 (559) 54 (1,372) 48 (1,219)
1,6003,8 Top Quantity = 4 300 - 600 kcmil Cu 32 30 (762) 90 (2,286) 72 (1,829)
1,6003,8 Bottom Quantity = 4 300 - 600 kcmil Cu 33 30 (762) 90 (2,286) 72 (1,829)
2,0003 Top Quantity = 6 300 - 600 kcmil Cu 30 32 (813) 90 (2,286) 72 (1,829)
2,0003 Bottom Quantity = 6 300 - 600 kcmil Cu 33 26 (660) 90 (2,286) 72 (1,829)
8004Top Quantity = 2 #1 - 600 kcmil Cu 29 28 (711) 90 (2,286) 72 (1,829)
8004Bottom Quantity = 2 #1 - 600 kcmil Cu 30 25 (635) 90 (2,286) 72 (1,829)
1,2004Top Quantity = 4 250 - 600 kcmil Cu 29 28 (711) 90 (2,286) 72 (1,829)
1,2004Bottom Quantity = 4 250 - 600 kcmil Cu 30 25 (635) 90 (2,286) 72 (1,829)
1,6004Top Quantity = 4 300 - 600 kcmil Cu 30 28 (711) 90 (2,286) 72 (1,829)
1,6004Bottom Quantity = 4 300 - 600 kcmil Cu 31 25 (635) 90 (2,286) 72 (1,829)
2,0004Top Quantity = 6 300 - 600 kcmil Cu 30 28 (711) 90 (2,286) 72 (1,829)
2,0004Bottom Quantity = 6 300 - 600 kcmil Cu 31 25 (635) 90 (2,286) 72 (1,829)
2,5004Top Quantity = 6 300 - 600 kcmil Cu 30 28 (711) 90 (2,286) 72 (1,829)
2,5004Bottom Quantity = 6 300 - 600 kcmil Cu 31 25 (635) 90 (2,286) 72 (1,829)
. Space in rear of structure not available.
. Entire rear of structure not available.
. Molded-case circuit breakers.
. WL power circuit breakers.
. - A lug size - Al, - Cu; - A, -/ Cu.
.  A - , A not available in back-to-back bottom mounting.
. Stab opening at bottom of unit not available in rear.
. % rated circuit breaker option available; unit size may increase.
. Optional lugs available. Contact factory for size and rating.
Note: All circuit breakers are calibrated for  °C ( °F).
tiastar™ Motor Control Centers Instruction Manual Installation


All dimensions are shown in inches (mm) unless otherwise specified.
. Main circuit breakers
Figure  Figure Figure  Figure 
A
B
C
20
(508)
A
B
C
20
(508)
A
B
C
20
(508)
A
B
C
20
(508)
A
C
20
(508)
A
BC
20
(508)
A
BC
20
(508)
C
B
A
6 (152)
12 (305)
30
(762)
A
C
B
6 (152)
12 (305)
30
(762)
A
C
B
6 (152)
12 (305)
20
(508)
A
C
6 (152)
12 (305)
20
(508)
Figure  Figure 
Figure  Figure Figure  Figure  Figure 
tiastar™ Motor Control Centers Instruction Manual Installation
