ETS-Lindgren LPRX Series Manual

LPRX and LFPRX Series Filters
RFI / EMI
10A - 400A Panel Filters
Installation and Maintenance Manual
1706370 Rev BDecember 2019

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ETS-Lindgren Inc. reserves the right to make changes to any products herein to improve functioning or design.
Although the information in this document has been carefully reviewed and is believed to be reliable, ETS-Lindgren
does not assume any liability arising out of the application or use of any product or circuit described herein; nor does
it convey any license under its patent rights nor the rights of others. All trademarks are the property of their respective
owners.
© Copyright 2019 by ETS-Lindgren Inc. All Rights Reserved. No part of this document may be copied by any
means without written permission from ETS-Lindgren Inc.
Trademarks used in this document: The ETS-Lindgren logo is a registered trademark of ETS-Lindgren, Inc.
Revision Record
MANUAL, LPRX LFPRX SERIES FILTERS | Part # 1706370 Rev B
Revision Description Date
AInitial Release September, 2019
BNote added to Maintenance section December, 2019

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TABLE OF CONTENTS
NOTES, CAUTIONS, AND WARNINGS 7
SAFETY INFORMATION 7
GENERAL SAFETY CONSIDERATIONS 8
INTRODUCTION 9
ETS-Lindgren Product Information Bulletin . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
PRECAUTIONS 9
FILTER COMPONENTS 10
Filter Elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Terminations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Output. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Filter Penetrations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
MOV Failure and Protective Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Automatic Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Shorting Stick (Not Provided) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
ELECTRICAL PERFORMANCE CHARACTERISTICS 11
Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Voltage Drop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Overload Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Short Circuit Current Rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Power Filter Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Insertion Loss (Stop Band) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Power Factor Correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Frequency of Operation (Pass Band) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
ENVIRONMENTAL SPECIFICATIONS 13
INSTALLATION 13
Grounding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

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POWER ON 14
In-Rush Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reactive (Leakage) Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MAINTENANCE 15
Inspection and Cleaning of Wiring Compartments . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Capacitance Measurement and MOV Inspection Procedure 16
If no Transient Protection is provided the sections pertaining to MOVs do not apply. 16
ILLUSTRATIONS 17
Filter Penetration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Filter Electrical Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
WARRANTY STATEMENT 21

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NOTES, CAUTIONS, AND WARNINGS
Note: Denotes helpful information intended to provide tips for better use of
the product.
Caution: Denotes a hazard. Failure to follow instructions could result in
minor personal injury and/or property damage. Included text gives proper
procedures.
Warning: Denotes a hazard. Failure to follow instructions could result in
SEVERE personal injury and/or property damage. Included text gives proper
procedures.
SAFETY INFORMATION
Refer to Manual: When product is marked with this symbol, see the
instruction manual for additional information. If the instruction manual has
been misplaced, download it from www.ets-lindgren.com, or contact
ETS-Lindgren Customer Service.
High Voltage: Indicates presence of hazardous voltage. Unsafe practice
could result in severe personal injury or death.
High Voltage: Indicates presence of hazardous voltage. Unsafe practice
could result in severe personal injury or death.
Protective Earth Ground (Safety Ground): Indicates protective earth
terminal. You should provide uninterruptible safety earth ground from the
main power source to the product input wiring terminals, power cord, or
supplied power cord set.
See the ETS-Lindgren Product Information Bulletin for safety, regulatory, and other product marking
information.

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GENERAL SAFETY CONSIDERATIONS
Before power is applied to this instrument, ground it properly through the
protective conductor of the AC power cable to a power source provided with
the protective earth contact. Any interruption of the protective (grounding)
conductor, inside or outside the instrument, or disconnection of the protective
earth terminal could result in personal injury.
Before servicing: contact ETS-Lindgren – servicing (or modifying) the unit by
yourself may void your warranty. If you attempt to service the unit by yourself,
disconnect all electrical power before starting. There are voltages at many
points in the instrument which could, if contacted, cause personal injury.
Only trained service personnel should perform adjustments and/or service
procedures upon this instrument. Capacitors inside this instrument may still
be CHARGED even when instrument is disconnected from its power source.
Only qualied personnel should operate (or service) this equipment.
WARRANTY

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INTRODUCTION
ETS-Lindgren Filter Panels are electromagnetically isolated Electromagnetic Interference (EMI) Filter cabinets with EMI
isolated lter elements. Filters designated as -TS are equipped with transient protection devices (MOVs). The lter is
designed to lter internally and externally generated EMI conducted emissions and arrest high transient currents when
equipped with MOVs.
ETS-Lindgren Product Information Bulletin
See the ETS-Lindgren Product Information Bulletin included with your shipment for the following:
• Warranty information
• Safety, regulatory, and other product marking information
• Steps to receive your shipment
• Steps to return a component for service
• ETS-Lindgren calibration service
• ETS-Lindgren contact information
PRECAUTIONS
LETHAL VOLTAGES PRESENT. THIS UNIT SHOULD BE INSTALLED AND MAINTAINED BY A
QUALIFIED ELECTRICIAN.
AUTOMATIC BLEEDER RESISTORS DISCHARGE THE CAPACITORS TO 50 V FIVE (5)
SECONDS AFTER POWER IS REMOVED.
USE A SHORTING STICK (NOT INCLUDED) TO TOUCH ALL EXPOSED METAL SURFACES
PRIOR TO TOUCHING THE FILTER.

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FILTER COMPONENTS
Filter Elements
The lter panel consists of lter elements and termination points. If the lter is equipped with Transient Protection,
there will also be MOVs in the panel.
There are NO USER SERVICEABLE PARTS inside the lter elements.
Should a lter element be determined to be defective, contact ETS-Lindgren to order a replacement or to schedule
its return or replacement.
Terminations
Input
Only qualied personnel should operate or service this equipment.
The source conductors are brought through an opening made in the eld on the dirty side of the lter. The opening
should be of su󰀩cient diameter to allow the free passage of conductors according to local and national electrical
codes as applicable. The conductors should then be directly terminated to the lugs provided (or equivalent). All
conductors must be of the appropriate size to carry the required rated current according to local and national
electrical codes.
Output
The output conductors are brought into the clean side of the lter through a conduit penetration (if provided)
or a circular opening in the back of the lter panel. The conductors should then be directly terminated to the
lugs provided (or equivalent). All conductors must be of the appropriate size to carry the required rated current
according to local and national electrical codes.
The output terminals of the lter are EMI isolated from the inputs.
Wiring and grounding should be done in accordance to the wiring schematic provided in the Illustrations section
of this manual. All conductors must be of the appropriate size to carry the required rated current according to local
and national electrical codes.
Filter Penetrations
All lter penetrations include attached conductive elastomeric gaskets to maintain shielding e󰀨ectiveness and
environmental seal.
MOV Failure and Protective Devices
The prime power circuit breaker upstream from the MOV (if provided) protector should provide overcurrent
protection. This minimizes the possibility of undetected loss of transient protection (if provided).

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Automatic Discharge
Some signal lters contain bleeder resistors that will automatically reduce the voltage on any component to less than
50 V within ve (5) seconds after the removal of input power. Contact ETS-Lindgren for details. Always discharge
lters as described in the SHORTING STICK section of this manual.
Shorting Stick (Not Provided)
Only qualied personnel should operate or service this equipment.
A shorting stick (grounding rod) should be used by qualied service personnel to ensure all capacitors and other
energy storage elements are discharged and in a safe state. All terminals accessible to service personnel and
capable of retaining stored energy in the event of automatic discharge circuit failure are accessible and should be
shorted to ground with a shorting stick or equivalent.
ELECTRICAL PERFORMANCE CHARACTERISTICS
Voltage
60 Hz Filters -- Nominal
Line-to-Ground 0 - 277 VAC
Line-to-Line 0 - 480 VAC
The lter may operate with DC voltages or lower frequencies up to the maximum rated AC voltage.
Operating lters without power correction coils will cause excessive reactive current to ow even with no
load present.
Do not operate lters at lower than 350 Hz if power correction coils are connected.
Voltage Drop
The total AC voltage drop from input to output is designed to be no more than 2% of the rated voltage when
measured into a unity power factor.
Overload Current
The lter can withstand an overload current of 1.4 times the rated current in amperes for a period of fteen (15)
minutes and maintain ltering during this period per MIL-F-15733. The lter can also survive without degradation or
damage, a short circuit current according to the table in the SHORT CIRCUIT CURRENT RATING section
of this manual.

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Short Circuit Current Rating
The Arc Interrupt Current Rating (AIC) or Short Circuit Current Rating (SCCR) for the panels is as in table below:
LPRX / LFPRX Filter
Current Model Filter Amperage Filter Voltage AIC / SCCR Rating
10 A 10 A 277 / 480 VAC 10 kA
30 A 30 A 277 / 480 VAC 25 kA
60 A 60 A 277 / 480 VAC 25 kA
100 A 100 A 277 / 480 VAC 50 kA
250 A 250 A 277 / 480 VAC 50 kA
400 A 400 A 277 / 480 VAC 100 kA
600 A 600 A 277 / 480 VAC 125 kA
800 A 800 A 277 / 480 VAC 125 kA
1250 A 1250 A 277 / 480 VAC 150 kA
Power Filter Characteristics
UL listed lters will bare a UL listing label. The lter and lter elements comply with current revisions of MIL-F-15733,
UL-1283, and IEC 60939.
Insertion Loss (Stop Band)
100 dB from 14 kHz to 40 GHz tested no load per MIL-STD-220.
100 dB from 14 kHz to 20 MHz when tested full load per MIL-STD-220.
Power Factor Correction
If lter is to be used at 400 Hz, it is recommended that a Power Factor Correction coil is installed in shunt between
each phase voltage and ground in order to minimize the ow of reactive current. Once the power correction coil is
installed, the operating power frequency range of the lter then becomes 350 Hz to 450 Hz. For operation at other
frequencies or DC, the coils must be disconnected. Please call ETS-Lindgren before proceeding.
Current
As specied on lter label. Filter may be operated up to the lter’s rated maximum current. This is an RMS rating and
is a continuous 100% duty cycle rating. The lter may be operated on DC up to the same rating. If the lter is rated at
60 Hz, it may be operated at 400 Hz only if the current and voltage are de-rated to 50% of nominal 60 Hz operation.
Contact ETS-Lindgren for more information.
Frequency of Operation (Pass Band)
The lter is designed to operate in DC voltages up to the rated frequency operation indicated on the label. Typically
this will be 60 Hz or 400 Hz. The 400 Hz lters are indicated on the label having a “-4” su󰀩x at the end of the model
number. See also POWER FACTOR CORRECTION paragraph above.

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ENVIRONMENTAL SPECIFICATIONS
Attribute Operating Non-Operating
Temperature -45° C to + 65° C -55° C to +85° C
Altitude Sea Level to 8,000 ft Sea level to 40,000 ft
Humidity Relative humidity between 10% and
90% at air temperatures between
+25° C and +32° C
Relative humidity between 14% at an
air temperature of +71° C and as high
as 100% at temperatures from
33° C to +33° C with condensation at
all temperatures lower than +30° C
The lter will withstand transportation loads of +/- 5 g vertical and +/- 3 g in both horizontal axes, as packaged
for shipment.
INSTALLATION
Uncrate all parts. Check all parts for any shipping damage. Ensure adequate space is available for installing the lter.
Do not discard any packaging material until the unit is installed.
Electrical connection should only be performed by a qualied electrician and in compliance
with all applicable regulatory agencies.
Connection to the lter should be made by qualied electricians. Refer to the TERMINATIONS section for further
details.
Wiring should be done in accordance to the wiring schematic provided in the ILLUSTRATIONS section of this manual
and applicable local and national electrical codes and guidelines.
Installation of the conduit penetration and EMI gasket should be done in accordance with the drawing provided in the
ILLUSTRATIONS section of this manual.
If a power correction coil needs to be installed, follow the wiring schematic provided in the ILLUSTRATIONS section of
this manual.

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Grounding
ALL POWER FILTERS MUST BE GROUNDED TO THE BUILDING GROUND FOR SAFETY
AND PERFORMANCE REASONS.
In addition, the following installation conditions must be followed per the current revision of UL1283.
• The insulated grounding conductor must be identical in size, insulation material, and thickness to the grounded
and ungrounded circuit supply conductors. It must be green and with or without one or more yellow stripes. The
insulated grounding conductor must be installed as part of the circuit that supplies the lter. Refer to
Table 250-122 of the National Electrical Code for the appropriate size of the grounding conductor.
• The insulated grounding conductor must be grounded to earth at the service equipment or other
acceptable building earth ground, such as the building frame, in the case of a high-rise steel frame structure.
• Any attachment-plug receptacles in the vicinity of the lter must be a grounding type. The grounding
conductors serving these receptacles must be connected to earth ground at the service equipment or other
acceptable building earth ground, such as the building frame, in the case of a high-rise steel-frame structure.
• Pressure terminal or pressure splicing connectors and soldering lugs used in the installation of the lter must
be identied as suitable for the material of the conductors. Conductors of dissimilar metals must not be
intermixed in a terminal or splicing connector where physical contact occurs between dissimilar conductors
unless the device is identied for the purpose and conditions of use.
POWER ON
Prior to applying power to the lter, verify wiring is correct. Use an ohmmeter to verify there are no shorts
from any line to ground or neutral.
Electrical wiring verication should only be performed by a qualied electrician and in
compliance with all applicable regulatory agencies.
In-Rush Current
In-rush current is not a concern with lters as it is not a function of the rated current of the lter. In-rush current will
be determined mainly by the load connected after the lters. The lter itself is capable of withstanding high in-rush
currents created by the load for several seconds.
Reactive (Leakage) Current
Reactive current is the normal presence of current on the lter lines even when no load is connected. A closer
examination reveals that when voltage is applied to the lter, there will be a normal current drain. This normal current
drain is usually around 10% to 15% of the rated current of the lter. The presence of this current does not indicate a
problem unless it is above the level expected. Contact ETS-Lindgren for specic leakage current for each particular
lter model. Filters operating at 400 Hz present a unique reactive current condition. See section on POWER
FACTOR CORRECTION and FREQUENCY OF OPERATION.

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MAINTENANCE
LETHAL VOLTAGES PRESENT. RISK OF ELECTRIC SHOCK.
AFTER REMOVING POWER FROM THE UNIT, THE AUTOMATIC BLEEDER RESISTORS
WILL DISCHARGE THE UNIT TO 50 V IN FIVE (5) SECONDS.
USE A SHORTING STICK (NOT INCLUDED) TO TOUCH ALL METALLIC SURFACES
EXPOSED BEFORE TOUCHING THE FILTER.
Only qualied personnel should operate or service this equipment.
Periodically power down the lter and remove the wiring compartment lids to check inside for dirt, debris and corrosion.
Oil, dirt, debris and corrosion inside the lter compartments should be removed according to appropriate procedures.
User’s own procedures for the removal of spills, dirt, debris and corrosion should su󰀩ce. Should EMI gasket become
torn or unusable, contact ETS-Lindgren to order replacement part E-903-008.
The MOV arrestor (if provided) should be replaced when an MOV test (see Capacitance Measurement and MOV
Inspection Procedure section) fails to indicate a working MOV. This test may be scheduled annually or as often as the
installation procedures require it.
Once a lter is properly installed it typically does not require maintenance under normal operating conditions. However,
if there is an extraordinary event a󰀨ecting the lters (such as a severe voltage overload or water entering the wiring
compartments), then the following procedures should be followed depending on the nature of the event. Follow the
INSPECTION AND CLEANING OF WIRING COMPARTMENTS procedure after an event that causes abnormal
contamination of lter wiring compartments with liquid or debris. Follow the CAPACITANCE MEASUREMENT AND
MOV INSPECTION PROCEDURE following an event that causes abnormal voltage overloads or spikes beyond that
which the lters are designed to accommodate.
Frequency of maintenance is at the discretion of the user and may be included in a routine maintenance
schedule for the connected equipment. However, lters in clean, industrial environments typically do not
require maintenance.
Inspection and Cleaning of Wiring Compartments
1. Remove power from the lter(s).
2. Wait at least sixty (60) seconds, then remove the wiring compartment covers.
3. Short the lter terminals to the lter case using a conductive shorting stick (not included) to ensure that the lter
capacitors are fully discharged.
4. Inspect the lter terminals and insulators for contamination and/or damage.
5. If the terminals or insulators are cracked or damaged replacement in the eld is not possible.
Call ETS-Lindgren for instructions.
6. Clean the terminals and insulators as necessary, and remove any loose debris from the wiring compartments.
7. Re-install the wiring compartment covers. Ensure even compression of the RF gasket around the RF tight
wiring compartment. Begin by torquing all of the cover screws to 1 N-m, starting in the center of each ange
and working out towards the corners. Then, using the same pattern, torque all screws to 5 N-m.
8. Re-apply power to the lter(s).

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Capacitance Measurement and MOV Inspection Procedure
If no Transient Protection is provided the sections pertaining to MOVs do not apply.
1. Remove power from the lter(s).
2. Wait at least sixty (60) seconds, then remove the wiring compartment covers. Use a voltmeter to ensure no
voltage is present.
3. Short the lter terminals to the lter case using a conductive shorting stick (not included) to ensure that lter
capacitors are fully discharged.
4. Disconnect the phase and neutral electrical wiring from the electrical termination points.
5. Inspect the lter terminals and insulators for contamination and/or damage.
6. If any of the terminals or insulators are cracked or damaged replace the damaged component in accordance
with the directions provided with the replacement parts.
7. Inspect the MOVs (when provided) for damage.
8. If any MOVs are damaged, replace the damaged component in accordance with the directions provided with
the replacement parts.
9. Measure MOVs with a Bourns Model 4030-01 (or equivalent) to determine if they are operational. Replacement
is required if they are not operational.
10. Measure the line to ground capacitance of each phase. Using an LCR bridge measure the capacitance of each
phase at 120 Hz. Contact ETS-Lindgren for expected values (please provide model number of lter). The
reading should be according to these values ±20%. A DF measurement should be done at the same time and
recorded. DF readings above 0.08 should be noted and ETS-Lindgren should be called for advice before re-
applying power to the lter.
11. Clean the terminals and insulators as necessary, and remove any loose debris from the wiring compartments.
12. Re-install the phase and neutral electrical wiring to the electrical termination points. Torque the bolts and/or
nuts to the specied torque as noted next to the termination point.
13. Re-install the wiring compartment covers. Ensure even compression of the RF gasket around the RF tight
wiring compartment. Begin by torquing all of the cover screws to 1 N-m, starting in the center of each
ange and working out towards the corners. Then using the same pattern torque all screws to 5 N-m.
14. Re-apply power to the lter(s).

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ILLUSTRATIONS
Filter Penetration
Filter penetrations should be installed as shown

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Filter Electrical Wiring
PFCC connections diagram

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Proper grounding (earth) and wiring of lter in chamber installation

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