TCI MotorShield Users Manual

MotorShield™ Section 1

Warning

Dangerous Voltage Warning: warns of situations in which a high voltage can cause physical
injury and/or damage equipment. The text next to this symbol describes ways to avoid the
danger.

Warning

General Warning: warns of situations that can cause physical injury and/or damage
equipment by means other than electrical. The text next to this symbol describes ways to
avoid the danger.

Caution

General Caution: Identifies situations that can lead to a malfunction and possible equipment
damage. The text describes ways to avoid the situation.

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■ Section 1

1.1 Safety Instructions

1.1.1 Overview

This section provides the safety instructions which must be followed when installing, operating and servicing the
MotorShield™ Filter. If neglected, physical injury or death may follow, or damage may occur to the MotorShield or
equipment connected to the MotorShield. The material in this chapter must be read and understood before
attempting any work on, or with, the product.

The MotorShield is intended to be connected to the output terminals of a variable frequency drive (VFD). An AC
motor is connected to the output terminals of the MotorShield and receives power from the VFD through the
MotorShield. The instructions, and particularly the safety instructions, for the VFD, motor and any other related
equipment must be read, understood and followed when working on any of the equipment.

1.1.2 Warnings and Cautions

This manual provides two types of safety instructions.
Warnings caution readers about conditions, which can, if proper steps are not taken, lead to a serious fault condition,

physical injury, or death.
Cautions are used to draw attention to instructions. Failure to properly follow such instructions may lead to a

malfunction and possible equipment damage.

Warnings

Readers are informed of situations that can result in serious physical injury and/or serious damage to equipment with
warning statements marked with the following symbols:

Cautions

Readers are informed of situations that can lead to a malfunction and possible equipment damage with caution
statements:

1 MSD IOM Manual

Section 1 MotorShield

Warning

Be sure to read, understand, and follow all safety instructions.

Warning

Dangerous Voltage is used in the operation of the MotorShield. Only qualified electricians
should carry out all electrical installation and maintenance work on the MotorShield.

Warning

Do not attempt any work on a powered MotorShield.
All sources of power must be disconnected before working on the MotorShield.

Warning

After removing power, always allow 5 minutes for the capacitors in the MotorShield and in
the drive to discharge before working on the MotorShield, the drive, the motor, or connecting
wiring. Verify with a voltmeter to make sure that all sources of power have been
disconnected and that all capacitors have discharged before beginning work.

Caution

The drive output terminals, MotorShield and the motor cables are at a dangerously high
voltage when power is applied to the drive regardless of motor operation.

Warning

All wiring must be in accordance with the National Electrical Code (NEC) and/or any other
codes that apply to the installation site.

Caution

Visually inspect and secure all loose electrical connections before applying power to the
filter. Failure to do so may result in filter damage or diminished filter performance.

Warning

The MotorShield, drive, motor, and other connected equipment must be properly grounded.

Warning

Prior to operation, confirm the drive operation mode is set to Volts per Hertz mode prior to
operation. Consult the drive manufacturer for proper configuration parameters. Failure to
properly configure the drive could result in drive failure or filter component failure.

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1.1.3 General Safety Instructions

These safety instructions are intended for all work on the MotorShield™. Additional safety instructions are provided
at appropriate points on other sections of this manual.

™

MSD IOM Manual 2

MotorShield™ Section 2

Caution

This manual provides general information describing your MotorShield filter. More specific
information is provided by the drawings shipped with the unit. Be sure to carefully review the
information provided by these drawings. Information provided by the drawings shipped with
the unit takes precedence over the information provided in this manual.

The ratings, dimensions, and weights given in this manual are approximate and should not
be used for any purpose requiring exact data. Contact the factory in situations where certified
data is required. All data is subject to change without notice.

 Make sure that the installation location is appropriate for the enclosure type selected.

 Select a mounting area that will allow adequate cooling air and maintenance access.

 Make sure that all wiring conforms to the requirements of the National Electric Code (NEC)

and/or other applicable electrical codes.

 Connect the MotorShield equipment grounding lug to the system ground of the premises wiring

system. Use a properly sized grounding conductor.

 Wire the output power terminals of the VFD, T1(U), T2(V), & T3(W) to the input terminals of

the MotorShield, U, V, & W.

 Wire the output power terminals, of the MotorShield, T1, T2, & T3 to the motor.

 Connect reactor and capacitor temperature switches to the appropriate fault monitoring circuit.

 Check the MotorShield nameplate to ensure rated voltage is appropriate for the power, drive and

motor voltage.

 Make sure that the VFD is set for operating modes and ranges that are compatible with the

MotorShield.

 Confirm the drive operation mode is set to Volts per Hertz mode prior to operation. Consult the

drive manufacturer for compatibility settings for use with sine wave filters.

 Check the installation thoroughly before operating the equipment.

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2 ■ Section 2

2.1 Introduction

Thank you for selecting the MotorShield™ High Performance Sine wave Filter. TCI has produced this filter for use in
many PWM variable frequency drive (VFD) applications that require low-distortion sine wave output power. This
manual describes how to install, operate, and maintain the MotorShield filter.

2.1.1 Intended Audience

This manual is intended for use by all personnel responsible for the installation, operation, and maintenance of the
MotorShield. Such personnel are expected to have knowledge of electrical wiring practices, electronic components,
and electrical schematic symbols.

2.1.2 Additional Information

2.1.3 Installation Checklist

Adhere to the following installation checklist for a successful installation. These points are explained in detail in the
subsequent sections of this manual.

3 MSD IOM Manual

Section 2 MotorShield

2.2 Receiving Inspection and Storage

2.2.1 Receiving Inspection

The MotorShield™ has been thoroughly inspected, functionally tested at the factory and carefully packaged for
shipment. When you receive the unit, you should immediately inspect the shipping container and report any damage
to the carrier that delivered the unit. Verify that the part number of the unit you received is the same as the part
number listed on your purchase order.

2.2.2 TCI Limited Warranty Policy

TCI, LLC (“TCI”) warrants to the original purchaser only that its products will be free from defects in materials and

workmanship under normal use and service for a period originating on the date of shipment from TCI and expiring
after one (1) year of useful service, not to exceed eighteen (18) months from the date of shipment.

The foregoing limited warranty is TCI’s sole warranty with respect to its products and TCI makes no other warranty,

representation or promise as to the quality or performance of TCI’s products. THIS EXPRESS LIMITED

WARRANTY IS GIVEN IN LIEU OF AND EXCLUDES ANY AND ALL EXPRESSED OR IMPLIED
WARRANTIES INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTY OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.

This warranty shall not apply if the product was:

™

a) Altered or repaired by anyone other than TCI;
b) Applied or used for situations other than those originally specified; or
c) Subjected to negligence, accident, or damage by circumstances beyond TCI’s control,

including but not limited to, improper storage, installation, operation or maintenance.

If, within the warranty period, any product shall be found in TCI’s reasonable judgment to be defective, TCI’s
liability and the Buyer’s exclusive remedy under this warranty is expressly limited, at TCI’s option, to (i) repair or

replacement of that product, or (ii) return of the product and refund of the purchase price. Such remedy shall be

Buyer’s sole and exclusive remedy. TCI SHALL NOT, IN ANY EVENT, BE LIABLE FOR INCIDENTAL

DAMAGES OR FOR CONSEQUENTIAL DAMAGES INCLUDING, BUT NOT LIMITED TO, LOSS OF
INCOME, LOSS OF TIME, LOST SALES, INJURY TO PERSONAL PROPERTY, LIABILITY BUYER
INCURS WITH RESPECT TO ANY OTHER PERSON, LOSS OF USE OF THE PRODUCT OR FOR ANY
OTHER TYPE OR FORM OF CONSEQUENTIAL DAMAGE OR ECONOMIC LOSS.

The foregoing warranties do not cover reimbursement for removal, transportation, reinstallation, or any other
expenses that may be incurred in connection with the repair or replacement of the TCI product.

The employees and sales agents of TCI are not authorized to make additional warranties about TCI’s products.

TCI’s employees and sales agents oral statements do not constitute warranties, shall not be relied upon by the Buyer

and are not part of any contract for sale. All warranties of TCI embodied in this writing and no other warranties are
given beyond those set forth herein.

TCI will not accept the return of any product without its prior written approval. Please consult TCI Customer
Service for instructions on the Return Authorization Procedure.

2.2.3 Storage Instructions

If the MotorShield is to be stored before use, be sure that it is stored in a location that conforms to published storage
humidity and temperature specifications stated in this manual. Store the unit in its original packaging.

Long-Term Storage

In the case of long-term storage, defined as any period greater than eighteen (18) months, TCI Technical Support
must be contacted prior to applying power.

MSD IOM Manual 4

MotorShield™ Section 2

2.3 Product Description

MotorShield™ Sine Wave Filter

The MotorShield is a low-pass sine wave filter designed and developed by TCI to deliver conditioned power to
motor loads driven by PWM drives with switching frequencies from 2kHz to 16kHz. This filter is suitable for VFD
drives configured to Volts per Hz modes only. Available for three phase voltage systems up to 460/480 Volts, the
MotorShield is a passive LC filter connected in series with the output terminals of the variable frequency drive. This
design removes the carrier frequency distortion from the output voltage waveform resulting in a nearly pure sine
wave voltage profile.

The MotorShield sine wave filter reduces the effects of the reflected wave phenomenon (dV/dt), which can cause
motor heating, insulation damage, and excessive audible noise. The reduction of high frequency VFD output
currents extends the life of motors and transformers, and eliminates the need for special motor cables. The
MotorShield reduces VFD ground fault problems and noise interference in transducer signals caused by stray high
frequency harmonic currents.

The MotorShield is available in a NEMA 1 / 3R enclosure which can be mounted adjacent to the VFD.

The MotorShield consists of the following standard features and components:

 An L-C power filter circuit with:

o A TCI 3-phase reactor
o High-endurance, harmonic-rated capacitors
o Compression terminals for ease and integrity of all power wiring
o Suitable for all lead lengths extending up to 15,000 feet

5 MSD IOM Manual

Section 2 MotorShield

2.3.1 Filter Configuration

™

Typical Configuration* for MSD 480V 9A to 45A

Typical Configuration* for MSD 480V 55A to 305A

Figure 2.1: Typical Configurations for the MotorShield™ Filter

*This drawing is for general reference only. Use the drawings supplied with the unit for installation.

MSD IOM Manual 6

MotorShield™ Section 2

MotorS hie ld™ Output F ilter

MSD0110A000

105798DG

130

105798DG

80 MAX

MotorShield

™

110

1 / 3R

2.4 Nameplate Data

Figure 2.2 shows an example of a MotorShield nameplate. The following information is marked on the nameplate:
Part number: encoded model number explained on the following page
FLA: the rated continuous operating current (RMS amps)
System Voltage: the maximum VFD output voltage (fundamental)
Hz: the maximum VFD output frequency (fundamental)
Phase: 3 – The MotorShield is designed for use only with 3 phase loads.
Drawing and Schematic #: outline and mounting dimension of filter with schematic diagram
Manufacturing #: for TCI internal use
Enclosure Type: NEMA 1 / 3R

Figure 2.2 – Example of MotorShield™ Nameplate

7 MSD IOM Manual

Section 2 MotorShield

2.5 Part Number Encoding

Figure 2.3 identifies the significance of each character in the MotorShield™ model number. The example model
number, MSD0110A300 designates a MotorShield that is rated 110 Amps, 480V.

™

Figure 2.3 – MotorShield™ Model Number Encoding

The MotorShield has a current rating rather than a horsepower rating. The rating and dimension tables in the following
section list the nominal horsepower ratings corresponding to the current ratings of the standard models.

MSD IOM Manual 8

MotorShield™ Section 2

Model

Number

Nominal

Horspower

Current

Rating

(Amps)

Weight

(lbs.)

Height

(in.)

Width

(in.)

Depth

(in.)

Watts

Loss

MSD0009A300

5 9 57

19.13

16.00

19.50

102

MSD0012A300

7.5

12

58

19.13

16.00

19.50

116

MSD0016A300

10

16

58

19.13

16.00

19.50

145

MSD0023A300

15

23

75

19.13

16.00

19.50

210

MSD0030A300

20

30

75

19.13

16.00

19.50

244

MSD0035A300

25

35

75

19.13

16.00

19.50

303

MSD0045A300

30

45

90

19.13

15.15

19.50

304

MSD0055A300

40

55

105

19.13

15.15

19.50

350

MSD0065A300

50

65

144

22.13

20.87

28.50

374

MSD0080A300

60

80

162

22.13

20.87

28.50

546

MSD0110A300

75

110

177

22.13

20.87

28.50

769

MSD0130A300

100

130

187

22.13

20.87

28.50

827

MSD0160A300

125

160

340

36.00

28.80

37.00

683

MSD0200A300

150

200

425

36.00

28.80

37.00

1025

MSD0250A300

200

250

450

36.00

28.80

37.00

1153

MSD0305A300

250

305

460

36.00

28.80

37.00

1290

MSD0130A300

100

130

257

36.00

28.80

37.00

825

MSD0160A300

125

160

285

36.00

28.80

37.00

1000

MSD0200A300

150

200

300

36.00

28.80

37.00

1000

MSD0250A300

200

250 64.00

24.17

45.00

1300

MSD0305A300

250

305 64.00

24.17

45.00

1350

MSD0362A300

300

362 64.00

24.17

45.00

1600

MSD0420A300

350

420 64.00

24.17

45.00

1775

MSD0480A300

400

480 64.00

24.17

45.00

2100

MSD0600A300

500

600 64.00

24.17

45.00

2500

MSD0750A300

600

750

2.6 Standard Product Ratings and Dimension Tables

The following table lists the ratings and dimensions of the standard MotorShield™ models:

Table 2.1– MSD 480 Volt Models in NEMA 1/3R Enclosures

9 MSD IOM Manual

Section 2 MotorShield

Current ratings

Continuous current: 9 to 305 amps. See Rating and Dimension tables
Intermittent current: 150% for 1 minute out of every 60 minutes

VFD Drive output voltage

480V Max., 3 ph, configured as Volts per Hz control

VFD Drive output
frequency

0 to 80 Hz

VFD Drive carrier
frequency

2 kHz to 16 kHz

Filter performance

Maximum peak voltage of output waveform – 480 V models: 1000 V
Maximum dV/dt of output waveform – 480 V models: 500 V/μs

Maximum elevation

3,300 feet (1,000 meters) as standard. Product must be de-rated for
operation above this level

Ambient operating
temperature range

-30°C (-22°F) to 40°C (104°F) as standard. Product must be equipped
with special cooling provisions for operation above this temperature

Ambient storage
temperature range

-40°C (-40°F) to 50 °C (122 °F)

Maximum humidity,
operating or storage

95%, non-condensing
Enclosure options

NEMA 1/3R enclosure

Enclosure finish

Free standing enclosures: Pebble Gray

Insertion impedance

Nominal 6.5% at 60 Hz & full load current

Capacitors

High endurance design (no PCBs)

2.7 Product Technical Specifications

Table 2 lists the major technical specifications for the MotorShield™.

Table 2.2 – MotorShield™ Technical Specifications

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MSD IOM Manual 10

MotorShield™ Section 3

Warning

Unless specifically labeled as approved for such use, this equipment is not suitable for use in
an explosive atmosphere or in a "Hazardous (Classified) Location" as defined in article 500
of the National Electrical Code.

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3 ■ Section 3

3.1 Pre-installation Planning

3.1.1 Verify the Application

MotorShield™ Ratings

Make sure that the MotorShield is correct for the application. The voltage and current ratings of the MotorShield
must match the output voltage and current ratings of the connected variable frequency drive as it is configured for
use with the connected motor. Follow NEC and local electrical codes and regulations for selection and placement of
drive and load cables.

Variable Frequency Drive Settings

Make sure that the variable frequency drive will be set for operation modes and ranges that are compatible with the
MotorShield:

 Maximum output frequency: 80 Hz
 PWM switching frequency between 2 kHz and 16 kHz
 Switching frequencies higher than 2 kHz are preferred for better filter operation and lower noise levels.

However, ensure drive has sufficient de-rating at selected switching frequency since some drives have
limited output current capability when running at higher than nominal switching frequency.

 Mode of operation: V/Hz without DC braking

3.1.2 Select a Suitable Location

Environment

Locating the MotorShield in a suitable environment will help ensure proper performance and a normal operating
life.

The NEMA 1 / 3R unit must be installed in an area where it will not be exposed to:

 Corrosive liquids or gasses
 Explosive or combustible gases or dust
 Falling dirt and dust
 Excessive vibration

3.1.3 Working Space

Provide sufficient access and working space around the unit to permit ready and safe installation, operation and
maintenance. Make sure that the installation conforms to all working space and clearance requirements of the
National Electrical Code (NEC) and/or any other applicable codes. Provide sufficient unobstructed space to allow
cooling air to flow through the unit.

11 MSD IOM Manual

Section 3 MotorShield

Reactor
Thermal
Switch

Capacitor
Thermal
Switch

3.2 Power Wiring

The conduit and wiring from the output of the variable frequency drive to the motor must be routed to the MotorShield
and then to the motor. When selecting a mounting location for the MotorShield, plan for the routing of the power
wiring.

3.3 Thermal Switch

Thermal switches provide two normally closed thermal switches wired in series. One opens if the filter reactor
overheats, the second opens if the filter capacitors overheat. Connect these switches to monitoring equipment.

™

Figure 3.1: Thermal Switches

3.4 Optional Features

Additional wiring requirements may apply to MotorShield units that are equipped with optional features. For
instructions covering these additional requirements, refer to drawings and/or other supplemental information furnished
with the unit.

MSD IOM Manual 12

MotorShield™ Section 3

Warning

Be sure to read, understand, and follow all safety instructions provided in this manual prior to
beginning work.

Warning

Dangerous Voltage is used in the operation of the MotorShield™. Only qualified electricians
should carry out all electrical installation and maintenance work on the MotorShield.

Warning

All wiring must be performed in accordance with the National Electrical Code (NEC) and/or
any other codes that apply to the installation site.

Warning

Avoid contact with line voltage when checking for power.
Failure to follow the safety instructions set forth in this manual can result in serious injury or

death.

Warning

Exercise caution when connecting the filter to the drive. Internal filter components may carry
dangerous voltage which can cause death or serious injury upon contact.

NC Switch opens on over-temperature

Current Amps

Voltage

Contact Load

6

120 AC

Resistive loads

5

120 AC

Inductive loads

6

12 VDC

Resistive loads

4

24 VDC

Resistive loads

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3.5 Installation Guidelines

3.5.1 Wiring

Typical wiring diagrams for filters mounted in NEMA 1 / 3R enclosures can be found in Figure 2.1.

3.6 Connections

3.6.1 Before Connecting

Always consult the drive manufacturer’s safety, installation and operation instructions prior to connecting the
MotorShield to the drive.

3.6.2 Over Temperature Switch

A set of over temperature switches is supplied to prevent damage to the filter in the rare case of overheating due to
abnormal conditions. One switch measures capacitor case temperature, the other switch measures reactor core
temperature.

Table 3.1: Over Temperature NC Switch

13 MSD IOM Manual

Section 3 MotorShield

Line/Load

Ground

Amps

Min*
Wire

Torque

lb-in

Refer to

Table 3.3*

Amps

Min*
Wire

Torque

lb-in

Refer to

Table 3.3*

9

14 AWG

30

A 9 14

35 B 12

14 AWG

30

A

12

14

35

B

16

12 AWG

30

A

16

12

35 B 23

10 AWG

30

A

23

10

35

B

30

8 AWG

30

A

30

8

40 B 35

8 AWG

30

A

35

8

40

B

45

6 AWG

30

A

45

6

45 B 55

4 AWG

35

A

55

4

45

C

65

4 AWG

45

C

65

4

45 C 80

3 AWG

50

C

80

4

50

C

110

1/0 AWG

50

C

110

1/0

50 C 130

2/0 AWG

50

D

130

2/0

375

D

160

3/0 AWG

375

D

160

3/0

375 D 200

250kcmil (Two 1 AWG)

375

E

200

250kcmil (Two 1 AWG)

375

E

250

Two 2/0 AWG

375

E

250

Two 2/0 AWG

375 E 305

Two 3/0 AWG

375

E

305

Two 3/0 AWG

375

E

Table 3.3 – Wire Range Table

Wire range

Torque

lb-in A 1-4 AWG

35

6-14 AWG

30

1/0-3 AWG

50

B

4-6 AWG

45

8 AWG

40

10-14 AWG

35

C

2/0 -3 AWG

50

D

250kcmil - 1/0 AWG

375

E

350kcmil – 1 AWG

375

Table 3.4 – Thermal Switch Block

Wire range

Torque (lb-in)

22-12awg

7

3.6.3 Field Wiring Connection Terminals

Compression type terminals are provided for all field wiring connections. The wire size capacity ranges and
tightening torque for the grounding and power terminals are listed in Tables 3.2, 3.3 and 3.4.

Table 3.2 – Motor Power Terminal Wire Size Capacity Range and Tightening Torque (Cu)

™

* A larger wire can be used. See referenced table for wire range and torque.

MSD IOM Manual 14

MotorShield™ Section 3

Caution

Use wire that is appropriate for the voltage and current rating of the motor.
Use copper wire with an insulation temperature rating of 75 °C or higher.
The wire size and the voltage ratings must conform to the requirements of the National

Electrical Code and/or other applicable electrical codes.
Be sure to also follow the motor wiring instructions provided in the instruction manual for the

VFD.

!

3.6.4 Connection Diagram

Figure 3.2 shows the typical wiring connections between the MotorShield and the VFD and motor. Refer to the
instructions for the VFD or other equipment to which the fault contact is connected. To prevent damage due to
abnormal over temperature conditions, the use of an optional thermal interlock circuit with thermal switch is
recommended to shut down the drive if internal reactor temperatures exceed its temperature rating.

3.6.5 Grounding

The MotorShield panel equipment grounding lug must be connected to the ground of the premises wiring system.
The equipment grounding connection must conform to the requirements of the National Electric Code (NEC) and/or
any other codes that apply to the installation site. The ground connection must be made using a wire conductor.
Metallic conduit is not a suitable grounding conductor. The integrity of all ground connections should be
periodically checked.

3.6.6 Power Wiring

Connect the output of the VFD, terminals T1(U), T2(V), & T3(W), to the input of the MotorShield, terminals U, V,
& W. Connect the motor to the output of the MotorShield, terminals T1, T2, & T3.

Figure 3.2 – Typical Connection Diagram

15 MSD IOM Manual

Section 4 MotorShield

Caution

Prior to start up, confirm the drive operation mode is set to Volts per Hertz. Consult the
drive manufacturer for configuration instructions. Drive failure or filter component
failure may occur as a result of improper drive operation mode configuration.

Caution

Ensure drive output frequency is set between 2kHz and 16 kHz. Failure to do so may
result in damage to the filter.

Caution

Thoroughly check the installation before applying power and operating the equipment
for the first time.

Caution

Never operate the MotorShield without a load connected to its output terminals.

!!!

!

4 Section 4

™

4.1 MotorShield

4.1.1 Adjustments

Variable Frequency Drive Settings

Make sure that the variable frequency drive is set for operation modes and ranges that are compatible with the
MotorShield:

Maximum output frequency: 80 Hz
PWM switching frequency between 2 kHz and 16 kHz. Since the MotorShield removes most of the harmonic

content from the output waveform, quiet motor operation should be achieved with a switching frequency setting
within this range. Running smaller current filters at 2 kHz switching frequency can be too noisy, increasing
switching frequency to 4 kHz or higher is advised in these cases.

Mode of operation: "scalar" or "V/Hz" without DC braking unless the drive application has been confirmed by TCI
Technical Support.

™

Operation

4.2 Start Up (Commissioning)

4.2.1 Before Applying Power for the First Time

Inspect the installation to make sure that all equipment has been completely and correctly installed in accordance
with the Installation Guidelines section of this manual.

4.2.2 Before Operating the VFD for the First Time

Make sure that the variable frequency drive is set for operation modes and ranges that are compatible with the
MotorShield as described above.

MSD IOM Manual 16

MotorShield™ Section 5

Warning

Only qualified electricians should carry out all electrical installation and maintenance
work on the MotorShield.

Disconnect all sources of power to the VFD and MotorShield before working on the
equipment. Do not attempt any work on a powered MotorShield.

5 Section 5

5.1 Maintenance and Service

5.1.1 MotorShield™ Reliability and Service Life

The MotorShield has been designed to provide a service life that equals or exceeds the life of the variable frequency
drive. It has been thoroughly tested at the factory to ensure that it will perform reliably from the moment it is put
into service. The following periodic maintenance is recommended to ensure that the MotorShield will always
perform reliably and provide the expected service life.

Periodic Maintenance

 Check to see that the installation environment remains free from exposure to excessive dirt and

contaminants. Refer to the Pre-installation Planning section of this manual.

 Check to make sure that the enclosure ventilation openings are clean and unobstructed.
 Inspect the interior of the enclosure for signs of overheated components. Clean the interior of the enclosure

whenever excess dirt has accumulated.

 Check the integrity of all power and ground connections.
 All electrical connections must be re-torqued annually.

17 MSD IOM Manual

Section 5 MotorShield

Warning

Only qualified electricians should carry out all electrical installation and maintenance
work on the MotorShield.

Disconnect all sources of power to the VFD and MotorShield before working on the
equipment. Do not attempt any work on a powered MotorShield.

5.2 Troubleshooting

5.2.1 Reactor and Capacitor Temperature Switches

If the reactor temperature switch opens, it indicates that the MotorShield reactor is overheating. This may be caused
by the MotorShield being applied to a current that exceeds its ratings, a switching frequency lower than its minimum
specification, a motor frequency that exceeds maximum specifications, or blocked air flow. Check to make sure
current, drive switching frequency, and drive output fundamental frequency meet product specifications. Check to
make sure ventilation openings are open and not blocked or clogged. Ensure reactor is not covered with a thick layer
of dirt and dust.

5.2.2 Evaluating MotorShield™ Performance

The MotorShield performance can be evaluated by checking the output voltage waveform with an oscilloscope.

™

This waveform illustrates typical drive output and filter input voltages when measured from line to line.

MSD IOM Manual 18

Figure 5.1: Waveform Before MotorShield

MotorShield™ Section 5

Warning

Only qualified electricians should carry out all electrical installation and maintenance
work on the MotorShield.

Exercise caution when checking waveforms with an oscilloscope.
Use a dual probe, differential input set-up, or other means of isolating the scope

chassis from the motor voltage.
Disconnect power when attaching and removing the probes.

This waveform illustrates typical filter output voltage waveforms when measured from line to line. If the measured
waveform does not resemble a sine wave like this illustration, and looks more like the filter input waveform,
troubleshoot filter wiring and components.

Figure 5.2: Waveform After MotorShield

5.3 Replacement Parts

If replacement parts are needed, please contact your TCI representative. To ensure that the MotorShield continues to
perform to its original specifications, replacement parts should conform to TCI specifications.

5.4 Factory Contacts and Tech Support

For technical support, contact your local TCI distributor or sales representative.
You can contact TCI directly at 800-824-8282. Select "Customer Service" or "Technical Support" and have your

MotorShield nameplate information available.

19 MSD IOM Manual

Section 6 MotorShield

6 Section 6

6.1 Drawings

6.1.1 Typical Outline Drawings

Typical MotorShield drawings are provided on the following pages. These drawings provide general information
describing your MotorShield filter. More specific information is provided by the drawings shipped with the unit. Be
sure to carefully review the information provided by these drawings. The information on these drawings takes
precedence over the information provided in this manual.

™

MSD IOM Manual 20

MotorShield™ Section 6

Figure 6.1: MSD 480V 9A to 55A, NEMA 1/3R

21 MSD IOM Manual

Section 6 MotorShield

105797

™

Figure 6.2: MSD 480V, 65A to 130A NEMA 1/3R

MSD IOM Manual 22

MotorShield™ Section 6

105798

Figure 6.3: MSD 480V, 160A to 305A, NEMA 1/3R

23 MSD IOM Manual