Siemens tiastar MCC User manual

tiastarTM Motor Control Center
Installation Instructions For Motor Control Center (MCC) Units
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 1 of 12
Installation Instructions
July, 2015
Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A

Table of Contents
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 2 of 12
Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
1. Receiving 3
2. Removing Existing Unit 4
3. Installing Unit 5
4. Handle Adjustment 6
5. Outgoing Power and Control Wiring 7
6. Pre-operation Checks 7
7. High Density Units 8
8. 600A Bolted Clamp Assembly 10
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 unautho-
rized parts in the repair of the equipment or tam-
pering by unqualified personnel may result in dan-
gerous conditions which may cause death or seri-
ous injury, or equipment or property damage.
Follow all safety instructions contained herein.
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.
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:
DANGER - 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.
WARNING - 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.
CAUTION - 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 quali-
fied person is one who is familiar with the installation, con-
struction, 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.
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 suffi-
ciently 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.
9. Wiring Fixed Mounted Units 11
10.Recommended Tightening Torques
11.Additional Resources
12
12

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 3 of 12
1 Receiving
1.1 Carefully remove all packaging material from the unit.
1.2 Read the entire unit installation guide.
1.3 Inspect the unit for damage.
1.4 Become familiar with unit and unit support components
88
86
84
8382 85 87
81
1) Locking latch
2) Pilot device panel
3) Top barrier plate
4) Pilot device mounting hole
(used when mounting directly to unit)
5) Operating handle
6) Racking lever
7) Swing plate
8) Terminal block
Figure 1 - Unit Components
84
83
81 82
1) Pin-type door hinge
2) Shelf bracket
3) Separator angle
4) Intermediate angle
Figure 2 - Unit Support Components
If damage or loss is discovered, file a claim with the carrier who delivered the control unit. As much
identification as possible should accompany the claim, together with a full description of the damage.
When filing a claim with the carrier, photographs of the damage are very helpful.

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 4 of 12
2. Removing Existing Unit
Recommended Tools:
Flat-head screwdriver
Phillips-head screwdriver
Multimeter with pointed probes
2.1. Put disconnect operating handle in the PARK position
(See Figure 3).
Figure 3 - Operating Handle Positions
2.2. Unscrew latch located at the bottom of the unit
Rotate the latch until it disengages from the
separator angle (See Figure 4).
Figure 4 - Disengaging latch
2.3. Transfer pilot device panel from door to slot on unit.
Remove panel by removing the screws located at the
top and bottom of the panel.
2.4. Open vertical wireway door.
2.5. Move unit to “Test” position by opening racking lever in
the top barrier plate (See Figure 6a).
2.6. Disconnect control and load wiring.
2.7. Remove unit by slightly tilting the front of the unit
downward and sliding it out. This is to insure that
the unit doesn’t get caught on the shelf bracket.
2.8. If rearranging units of different sizes, perform the
following tasks:
2.8.1. Remove all unit support assemblies by unfasten-
ing the screws for each assembly, tilting upward
and sliding out of their holes.
2.8.2. Realign support assemblies as needed.
2.8.3. Include intermediate angles in all spaces (See Figure 2).
2.8.4. Remove stab hole covers at appropriate heights
and replace covers on unused stab holes.
Stab hole covers should be arranged so that the only
uncovered openings are those to which a unit will be
connected (See Figure 5).
2.8.4a MCCs with automatic shutters; tiastar Shutter
Mechanism Kit 8PG1191-2MA00 is available if
additional shutters are needed.
Stab
Hole
Covers
Figure 5 - Stab Hole Covers

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 5 of 12
3. Installing Unit
3.1. If present, remove existing door by first withdrawing its
hinge pins and then closing it halfway before sliding it
off its hinges.
3.2. Remove Intermediate angle by removing the screw
which fastens it to the Separator Angle and tipping
slightly to remove formed tab at top from slot in shelf
bracket above.
3.3. If necessary, install unit support assembly by inserting
shelf brackets at a slight angle into the appropriate
holes in the vertical bus support angle and snapping
into place. Secure support assembly with the two screws
provided. One screw fastens the right-hand shelf bracket
to the vertical bus support angle. The second screw
fastens the separator angle to the left side of the struc-
ture. For additional information on unit support installa-
tion, please refer to section 8.2.
3.4. If necessary, remove appropriate unit stab hole covers.
3.5. Install unit door by sliding it onto the hinges while half
open. Once on the hinges, open the door completely
and insert hinge pins.
3.6. Place plug-in unit inside of enclosure (Figure 6a).
3.6.1. With the handle in the PARK position, slide unit into
place on support assembly.
3.6.2. Slightly tilt the front of the unit downwards in order to
slide the back of the unit over the shelf brackets.
3.6.3. Once the unit has been pushed in as far as it can go,
close the racking lever in top barrier plate
(Figure 6b).
3.6.4. Engage locking latch at lower left of the unit to the
separator angle and tighten it using a flat-head
screwdriver (latch is shown above in Figure 4 on
page 4).
Figure 6a - Placing Unit on Support Assembly
and in test position
Figure 6b - Closing Racking Lever

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 6 of 12
4. Handle Adjustment
Note: Additional handle adjustment information can be
found in section 11
4.1. Perform all disconnect operating handle adjustments
with the unit removed from the motor control center or in
the “Test” position (See Figure 6a).
4.2. The adjustable link rod can adjust to increase or de
crease its overall length by rotating the sleeve. By rotat-
ing the sleeve clockwise the length is increased and by
rotating it counterclockwise the length is decreased.
A hex nut is provided as part of the adjustable link rod
and is tightened against the sleeve to prevent it from
going out of adjustment. The hex nut must be loose
and sufficiently away from the sleeve to allow it to
rotate during the adjustment of the handle.
Note: Always use two wrenches when loosening,
adjusting, or tightening the adjustable link rod.
One wrench adjusts the hex sleeve while the second
wrench holds the hex nut.
4.3. The handle assembly must be adjusted to perform the
following functions:
4.4. Unit must turn ON; Unit must turn OFF; Unit must indi-
cate TRIP; Unit must RESET.
4.5. Operate the handle from the ON position to the OFF
position and disconnect will turn OFF.
4.6. Return the handle to the ON position and the dis-
connect will turn ON. If it does not, rotate the sleeve
slightly clockwise and try again. Repeat this step until
the handle assembly turns the unit ON. Then, repeat
step 4.5. Note: To perform this operation with the door
open it will be necessary to push down on the exposed
interlock arm lever.
4.7. Trip the circuit breaker and the handle should move to
For Circuit Breaker Units Only
a position between the ON and OFF positions. (Most
circuit breakers can be manually tripped by pressing a
red or black button on the front of the device).
4.8. Move the handle down past the OFF position to reset
the circuit breaker. If the circuit breaker resets and
can be returned to the ON position by the handle, the
adjustment has been completed and the hex nut
should be tightened against the sleeve. If the circuit
breaker does not reset, turn the sleeve counterclock
wise slightly and try again. Repeat this step until the
breaker resets. Then repeat steps 4.5 – 4.8 to verify
operation.
Figure 7 - Operating Handle Adjustment
2 –
5/16 in. socket wrenches for adjusting unit handle
Recommended Tools:

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 7 of 12
5. Outgoing Power and Control Wiring
5.1. Connect power and control wires for the unit with
the unit stabs disengaged from the vertical bus.
5.2. Wiring between control units is pulled through the verti-
cal wireway at the right side of the section. These wires
can be fastened with the wireform wireties provided.
Route wiring to control units in other sections through
the horizontal wireways.
5.3. When load cable conduit is in the bottom of a Motor
Control Center, additional room for pulling cable may
be obtained by removing bottom plug-in units.
6. Pre-operation Checks
Before energizing and operating the motor control center,
perform the following checks
6.1. Operate all magnetic devices by hand to be sure that
all parts operate freely. Check all interlocks for proper
contact operation
6.2. Current transformers for customer remote devices are
hipped with their secondaries shorted out. Be sure all
such shunts are removed when the metering circuits are
completed.
6.3. Be sure that each motor is connected with the proper
starter
6.4. Check the overload setting or overload heater element
against the full load current shown on the nameplate of
each motor.
6.5. Check all heater elements to insure that they are
6.7. If instantaneous trip circuit breakers are used,
adjust as follows:
6.7.1. Determine motor full load current from the motor
nameplate data. Use screwdriver to set indicator
on adjustment screw to the appropriate position.
6.7.2. For maximum protection, the trip position should
be set as low as possible. Turn the adjustment
screw counterclockwise to successively lower
positions until the breaker trips on motor starting.
After this position is determined, turn the adjust-
ment screw clockwise to the next higher setting
for normal operation.
If the breaker does not trip at the lowest setting,
leave the indicator at this setting.
6.7.3. If tripping occurs at highest setting; re-check
motor nameplate information, then check voltage
and load with peak reading ammeter to locate
problem.
6.8. If fusible disconnect type starters are used, check for
proper fuse size. Fuse size should not exceed 150%
FLA for RK5 and 300% FLA for Type J.
6.9. Clean the motor control center and be sure that all
extraneous material has been removed.
6.10. Check the torque value of each connection.
Factory connections may loosen during shipment
storage. It is of utmost importance to inspect
all connections and bolted joints for tightness
PRIOR TO energizing the equipment. Follow torque
requirements of individual components for
motor / load connections.
6.11. Close all access plates and doors before the motor
control center is energized.
6.12. Jog motors to determine proper rotation.
5.4. For rear units of back-to-back Motor Control Centers,
connect motor T1 to terminal unit T3 and motor T3 to
terminal unit T1 in order to obtain the same motor rota-
tion as for motors controlled by front units.
properly installed.
6.6. Check all timers for proper time interval setting and
contact operations.

Coil Removal
1. For easy coil replacement, remove the unit from the
structure.
2. Loosen screw “A” which secures the cover.
3. Rotate the cover as shown in Figure 8 around the pivot
point.
4. Disconnect wiring to coil.
5. Remove coil through top of unit.
Terminal Block Swing Plate
1. To wire the unit, rotate the terminal block swing plate as
shown in Figure 9.
2. Route the wires from the vertical wireway into the unit
behind the right unit side angle.
Arc Cover Access Slots
Withdraw the unit for access to the arc cover screws through the
slots in the unit bottom plate as shown in Figure 10.
Hinge Installation
1. Remove the existing hinge (if present) in the 6 in space.
See Figure 11.
2. Install the unit support bracket per “Adding To A Blank Unit
Space” on page 4.
3. Locate and install the new hinge with the two mounting screws.
4. Install the door using two new hinge pins supplied with the unit.
Unit Access For Maintenance
1. Remove the unit from the structure.
2. Loosen screw “B” shown in Figure 12.
3. Lift the handle bracket and pull forward to disengage.
4. Rotate the left side of the unit open as shown in Figure 12.
5. When closing the unit, the handle must be in the OFF position.
Figure 10
Figure 8
Figure 9
Figure 11
Figure 12
Screw “A”
Handle Bracket Screw “B”
Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 8 of 12
7 High Density Units
Terminal
Block
Swing
Plate

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 9 of 12
Section 7 continued
6” Unit Access for Maintenance 150-250A Circuit Breaker Units
Handle Mechanism Screw “D”
Unit Access for Maintenance
1. Remove unit from structure
2. Remove screws “D” shown in figure 13- qty 4
3. Remove the handle mechanism from the unit
4. When reinserting the handle mechanism, the handle mustbe in the OFF position.

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 10 of 12
8. 400A and 600A Bolted Clamp Assembly
Figure 14
Figure 15
G
H
K
J
I
A
F
E
C
D
B
The clamp assembly is required for replacement or assembly of 400A and 600A circuit breakers or disconnect switches
that are mounted directly to the vertical bus.
Clamp Removal
1. Refer to Figure 14 for parts identification.
Loosen nut J and remove bolt H, washer I, and nut from riser.
2. Loosen nut D and remove bolt B, washer C, and nut from
the clamp assembly.
3. Remove tie bar and clamp assembly simultaneously.
4. Repeat steps 1 - 4 for each phase.
Clamp Assembly
Notice: To be installed on 600A or 800A vertical bus only.
1. Connect tie bar riser by sliding bolt H through tie bar and riser.
Fasten with washer I and torque nut J and bolt H securing to
280 in-lbs.
2. Loosely assemble the clamp assembly, making sure that
clamp spring E will compress against bar F, when the the bolt
is drawn tight.
3. Slide carriage bolt B through one side of the clamp assembly
and tie bar until it portrudes therough the other side of the
clamp assembly. Fasten with washer C and torque nut D to
bolt B securing to 280 in-lbs.
4. Repeat steps 1 - 3 for all phases.
5. Refer to Figure 15 for completed assembly.
A
B
C
D
E
F
G
H
I
J
K
- Vertical Bus Bar
- Carriage Bolt
- Flat Washer
- 3/8” Standard Hex Nut
- Clamping Spring
- Bar
- Tie Bar
- Carriage Bolt
- Flat Washer
- 3/8” Standard Hex Nut
- Riser from breaker / disconnect

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 11 of 12
9. Wiring Fixed Mounted Units to the Horizontal Bus
Figure 16
Figure 17
Figure 16
Units with large circuit breakers (
> 300A) positioned
at the very top of a section
Pass L1, L2, and L3 cables through the section top plate
barrier and connect them to the appropriate bus bars, as
shown in Figure 16.
Bundle all cables together above circuit breaker with wire ties.
Figure 17
Units with smaller circuit breakers (
 300A) positioned
anywhere within a section
Carefully bend L1, L2, and L3 cables towards the vertical
wireway and bundle all three together with a provided wire tie
within unit space.
In 12” increments, secure the bundled cables to the MCC
back panel with a provided wire clamp.
(See detail in Figure 17).
Once the bundled cables have been passed into the busway
region, connect them to the appropriate busbars, as shown
in Figure 17.
Add wire ties where cables enter into busway region.

Siemens Industry, Inc. 5300 Triangle Parkway, Norcross, GA 30092 A5E33045207A
E87010-A0401-T002-A5-MCC
tiastarTM Motor Control Center
Page 12 of 12
10. Recommended Tightening Torques
When making bolted assemblies, the following consider-
ations should be generally followed:
10.1 Metal-to-Metal
Thread Size Torque (lb-in.)
8 – 32 20
10 – 32 27 – 32
1/4 – 20 75
5/16 – 18 100
3/8 – 16 247
1 – 13 613
10.2 Control Terminals – 11 lb-in
Apply 2/3 of standard tightening torque.
10.3 400A and 600A fixed mounted unit clamp assembly
bolts should be tightened to 280 in-lbs.
10.4 Follow torque requirements of individual components
for motor / load connections.
11. Additional Resources
11.1 MCC Installation Guide:
E87010-A0156-T003-A5-MCC
11.2 Unit Support Assembly Guides:
E87010-A0279-T002-A5-MCC
E87010-A0280-T002-A5-MCC
E87010-A0281-T002-A5-MCC
11.3 6” Unit Handle Instruction Sheets:
11.3.1 125A CB w/Reset –
E87010-A0269-T003-A5-MCC
11.3.2 125A EG CB w/Reset –
E87010-A0276-T003-A5-MCC
11.3.3 125A EG CB –
E87010-A0277-T003-A5-MCC