DynAmp LKAT Plus Setup guide

DynAmp, LLC
3735 Gantz Road Phone [phone] www.dynamp.com
Grove City, Ohio 43123 USA Fax [phone] [email protected]
LKAT Plus EMC in MU
BI-DIRECTIONAL HIGH CURRENT
MEASUREMENT SYSTEM
Installation, Operation and Service Manual
Manual Item No. 047331
Rev. A

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DynAmp, LLC WARRANTY
Items and components manufactured by DynAmp, LLC for permanent installation are
warranted to be free from defects in material and workmanship for a period of two (2) years
from the date of shipment.
Items and components manufactured by DynAmp, LLC for portable and temporary use in
more than one location are warranted to be free from defects in material and workmanship for
a period of eighteen (18) months from the date of shipment.
Extended warranties may be available for purchase for some products. Extended warranties
are provided on a serial number by serial number basis as noted on DynAmp’s original
invoice and/or packing list.
Items and components not manufactured and resold by DynAmp, LLC are warranted by their
manufacturer.
Warranty repair shall be, at DynAmp’s option, in the form of repair or replacement of the
defective items or components. Concerning warranty repairs, DynAmp, LLC will be
responsible for DynAmp provided time, material and transportation costs (shipping or travel).
Actual method of warranty repair / correction will be determined by DynAmp, LLC at
DynAmp’s sole option. Such warranty repair shall constitute a fulfillment of all DynAmp, LLC
liabilities in respect to said items and components. In no event shall DynAmp, LLC be liable
for consequential damages
Information in this document is subject to change without notice.
© 2018 DynAmp, LLC. All rights reserved.
Reproduction in any manner whatsoever for purposes other than installation, operation, or
service by the purchaser or end user without the written permission of DynAmp, LLC is strictly
forbidden.
This manual is part of the complete set of product documentation that includes installation,
operation, and service instructions, drawings and test results. Users should evaluate the
information in the context of the complete set of product documentation and their particular
applications. DynAmp, LLC assumes no liability for any incidental, indirect, or consequential
damages arising from the use of this documentation.
While all information presented is believed to be reliable and in accordance with accepted
engineering practices, DynAmp, LLC makes no warranties as to the completeness of the
information.
All trademarks used in association with LKAT Plus are trademarks of DynAmp, LLC.

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TABLE OF CONTENTS
Paragraph Title Page
DynAmp, LLC WARRANTY..........................................................................................................iii
TABLE OF CONTENTS..................................................................................................................v
Hazard Warning! .........................................................................................................................vii
SAFETY.........................................................................................................................................ix
DynAmp, LLC Customer Support & Service Assistance...........................................................xi
MANUAL REVISIONS.................................................................................................................xiii
1. HANDLING AND STORAGE___________________________________________________ 1
2. PRODUCT DESCRIPTION ____________________________________________________ 3
2.1 SYSTEM OVERVIEW .........................................................................................................3
2.2 ADDITIONAL MEASURING HEAD DETAIL........................................................................4
2.3 ADDITIONAL METERING UNIT DETAIL ............................................................................4
2.4 ADDITIONAL INDICATORS AND OUTPUTS .....................................................................5
2.5 INTERCONNECTION CABLES DETAIL.............................................................................6
3. SPECIFICATIONS___________________________________________________________ 7
4. INSTALLATION____________________________________________________________ 11
4.1 HANDLING PRECAUTIONS.............................................................................................11
4.2 INSTALLATION CONSIDERATIONS................................................................................11
4.3 OFF-BUS FUNCTIONAL CHECK (Optional).....................................................................12
4.4 MEASURING HEAD INSTALLATION................................................................................12
4.5 METERING UNIT INSTALLATION....................................................................................13
4.6 SYSTEM CHECKOUT.......................................................................................................14
5. THEORY OF OPERATION ___________________________________________________ 17
5.1 GENERAL.........................................................................................................................17
5.2 OLOP TECHNOLOGY......................................................................................................17
5.3 SYSTEM FUNCTIONAL DESCRIPTION...........................................................................18
5.4 LKAT PLUS METERING UNIT..........................................................................................19
5.5 LKAT PLUS MEASURING HEAD INTERCHANGEABILITY..............................................19
5.6 TROUBLESHOOTING AN ACCURACY DIAGNOSTICS FAULT INDICATION.................19
5.7 SYSTEM CALIBRATION OVERVIEW...............................................................................20
5.8 CALIBRATION ADJUSTMENTS.......................................................................................21
5.9 FIELD CONFIGURATION OF TRIP SETPOINTS.............................................................23
5.10 EARTH GROUNDING.......................................................................................................24
5.11 CONFIGURING THE LOW PASS FILTER........................................................................24
5.12 “FAILSAFE” / “NON-FAILSAFE” CONFIGURATION.........................................................25
6. MAINTENANCE & SPARE PARTS_____________________________________________ 27
6.1 PERIODIC MAINTENANCE..............................................................................................27
6.2 ANNUAL MAINTENANCE.................................................................................................27
6.3 SPARE PARTS.................................................................................................................28
7. DRAWINGS_______________________________________________________________ 29

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FIGURES & TABLES
Figure # Title Page
FIGURE 3.1 LKAT PLUS FREQUENCY RESPONSE.................................................................................... 9
FORM 1LKAT PLUS DIAGNOSTIC MEASUREMENTS FORM 1–ZERO PRIMARY CURRENT ......................... 15
FORM 2LKAT PLUS DIAGNOSTIC MEASUREMENTS FORM 2–ENERGIZED PRIMARY BUS......................... 16
FIGURE 5.1 BLOCK DIAGRAM OF THE LKAT PLUS SYSTEM..................................................................... 18
TABLE 2.1 MAIN AND PE PC BOARD ASSEMBLY FEATURES ...................................................................... 5
TABLE 3.1 LKAT PLUS SYSTEM SPECIFICATIONS (SUBJECT TO CHANGE WITHOUT NOTICE) ........................ 7
TABLE 5.1 TROUBLESHOOTING AN ACCURACY DIAGNOSTICS FAULT INDICATION ..................................... 20
TABLE 5.2 TRIP CONFIGURATION DETAILS ............................................................................................ 23
TABLE 5.3 LKAT PLUSALARM RELAY STATUS ...................................................................................... 25
TABLE 6.1 SPARE PARTS LIST..............................................................................................................28
TABLE 7.1 DRAWING LIST.................................................................................................................... 29

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Hazard Warning!
Symbol Identification:
General definitions of safety symbols used on equipment and manual.
Caution/Warning: Refer to accompanying documents for instructions.
GENERAL
All installation, maintenance and service must be performed by qualified
technicians who are familiar with the warnings and instructions of this manual.
Use of the equipment in a manner not specified by the manufacturer can impair
the protection provided within.
The enclosure cover must remain closed at all times during operation to ensure
safety of personnel. The cover may be opened using a screwdriver; however,
only authorized personnel or technicians should be allowed to open and service
the unit.
Disconnect power to the system before servicing.
DynAmp, LLC does not assume liability for the customer’s failure to comply with
the rules and requirements provided in this manual.
HAZARDOUS
VOLTAGE
This equipment is designed to be connected to hazardous electric voltages.
Ignoring the installation precautions and warnings can result in severe personal
injury or equipment damage.
To avoid the risk of electrical shock or fire, the safety instructions and guidelines
in this manual must be followed. The electrical specifications must not be
exceeded and the unit must be installed according to directions provided.
This equipment is intended for indoor or outdoor use. It should be mounted in a
well-ventilated area, away from high heat, dust, and corrosive atmosphere. The
ambient temperature must not exceed specified limits.
For mounting considerations that fall outside the recommended specifications
provided in this manual, the factory should be contacted for approval.
This unit is rated for installation category II and pollution degree 2.
INSTALLATION

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SAFETY
The Measuring Head is designed to be installed on high voltage bus bars. All interconnection
cables must be safely routed away from bus bars and high voltages. Do not allow any
interconnection cable to contact bus bars or high voltages.
Ignoring the installation precautions and warnings can result in severe personal injury or
equipment damage. The following are general guidelines to be followed during installation,
operation and service of the Metering Unit and Measuring Head.
•All installation, maintenance and service must be performed by qualified technicians who
are familiar with the warnings and instructions of this manual.
•Always follow all local and plant safety procedures.
•The enclosure cover must remain closed at all times during operation to ensure safety of
personnel. Only authorized personnel or technicians should be allowed to open and
service the unit.
•Units are not intrinsically safe. Do not place in explosive atmospheres.
•Service must be performed by qualified technicians only. If use of an oscilloscope
becomes necessary during servicing, the scope must be floating and ungrounded or
differential probe(s) must be used. The Metering Unit is isolated from the mains via the
power transformers. If a grounded scope is used, a hazardous condition is created since
current will flow through the probe to ground.
•Use of the equipment in a manner not specified by the manufacturer can impair the
protection provided within.
•If a binding screw is used for the mains earth connection, the binding screw must be size
M4 (No. 6) or larger.
DynAmp, LLC does not assume liability for the customer’s failure to comply with the rules and
requirements provided in this manual.

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DynAmp, LLC Customer Support & Service Assistance
For further assistance, contact DynAmp Customer Support at:
Americas:
Telephone: [phone] Fax: [phone]
8:00 AM to 5:00 PM USA Eastern Time
From first Sunday in November to second Sunday in March – 13:00 GMT to 22:00 GMT
From second Sunday in March to first Sunday in November – 12:00 GMT to 21:00 GMT
After Hours Critical Service Emergency:
Telephone: [phone]
5:00 PM to 8:00 AM USA Eastern Time
From first Sunday in November to second Sunday in March – 22:00 GMT to 13:00 GMT
From second Sunday in March to first Sunday in November – 21:00 GMT to 12:00 GMT
Central e-mail:
[email protected]
DynAmp web:
www.dynamp.com

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MANUAL REVISIONS
Page
Change
Reason For Revision
Date
all
Rev
NEW
06/18
4, 23
sevl
A
ECO # 3347 – Update MUT description and update Table
5.2 and general verbiage
08/18

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1. HANDLING AND STORAGE
DynAmp products are engineered and manufactured for use in industrial environments.
However, they contain sensitive electronic and mechanical components which may be
damaged and fail if not handled and stored properly. All products must be handled and
stored with the same care as any precision measurement instrument. Severe bumps or jolts
may damage internal parts and cause malfunction or premature failure. DynAmp products
are designed and assembled with conformal coating, shock mounting, and environmental
seals, when appropriate or when specified. However, this protection requires that the product
must be properly installed and operational before the protection is fully functional. Therefore,
adequate protection from humidity, shock, and temperature must be provided during handling
and storage prior to installation.
The handling and storage of equipment must be sufficient to meet the storage temperature
and humidity specifications of the product and to prevent any condensation or contact with
water or any other liquid. The storage location and container or crate must provide adequate
protection from precipitation (rain, snow, ice) and direct water contact. Adequate shelter must
be provided to prevent the accumulation of precipitation (rain, snow, ice) and water which can
lead to the deterioration or failure of shipping containers or crates and cause water ingress.
Storage in coastal or industrial areas subject to salt-laden or corrosive air or areas of wind-
driven sand or other abrasive dust must be adequate to prevent the deterioration or failure of
shipping containers or crates and cause ingress. Frequent inspection of storage areas and
storage containers or crates is required to ensure proper storage conditions are being
maintained.
If the shipping container or crate is opened and/or the equipment is removed for inspection
prior to installation, the equipment must be repackaged in the original undamaged container
or crate in the same manner as it was shipped to prevent environmental damage or placed in
a storage location that meets the required environmental and storage conditions.
General product storage temperature and humidity requirements:
Storage Temperature: -40°C to 70°C
-40°F to 158°F
Storage Humidity: Maximum 85%, non-condensing
DynAmp, LLC does not assume liability for the customer’s failure to comply with handling and
storage requirements.
For further assistance, contact DynAmp customer support.

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2. PRODUCT DESCRIPTION
2.1 SYSTEM OVERVIEW
The DynAmp LKAT Plus system is designed to accurately measure AC or DC current flowing
in a bus bar. Each system consists of a Measuring Head, a Metering Unit, and
multi-conductor cables.
The LKAT Plus Metering Unit consists of a power supply pc board and Main pc board
mounted together on a steel U-chassis. Input, output, and power connections are made from
outside the enclosure using panel-mount IP65 rated military-style circular connectors. Wiring
harnesses within the Metering Unit are terminated using 3.5mm and 5.08mm “Eurostyle”
connectors.
AVAILABLE ACCESSORIES
•Summing / Totalizing multiple LKAT systems
A dedicated external module is available for totalizing/ summing up to 10 LKAT measurement
signals. This is typically used to provide a true ‘total’ current signal when multiple rectifiers
( with individual LKAT systems ) are connected in parallel to provide a higher total current.
•LKAT-MUT Functional Test
This hand-held test set allows users to verify system operation and scaling as well as test
relay trip points and output signals in the field.
•LKAT Metering Unit Tester ( LKAT MUT )
The LKAT MUT is a portable tester used to verify the functionality of Metering Units for all
versions of the LKAT family of products.
Adapters included with the LKAT MUT allow the tester to be connected directly and check
any LKAT Metering Unit electronics.
The functions and parameters checked by the LKAT MUT include:
•Input / output sensitivity
•Trip point scaling
•Trip relay contacts
•Integrity of input / output harnesses and interconnections on Metering Unit
The tools / documentation required to use the LKAT Metering Unit Tester include :
•4-1/2 digit DMM with 0.05% basic DC accuracy ( user provided )
•DMM Test probes ( user provided )
•Banana to banana cables ( 1black / 1 red )
•LKAT MUT Product Manual
More information on the LKAT MUT can be found at www.dynamp.com or by contacting
DynAmp.

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•Extended Warranty
For permanently installed systems, the standard 2-year warranty can be extended in 2-year
increments. This must be ordered less than 6 months after the original LKAT system is
shipped.
2.2 ADDITIONAL MEASURING HEAD DETAIL
LKAT Measuring Heads contain an arrangement of Hall Effect sensor ICs and signal
conditioning electronics. The tubular enclosure is constructed of flame retardant plastic
materials. Insulation from the bus is provided by the homogeneous (sealed) construction of
the head. In the event that the head enclosure components become cracked, the bonding
fails, or the weather-tight seal is broken in any way; a replacement head must be substituted.
The Measuring Head is not designed to be repaired.
The LKAT Measuring Head may be mounted on the bus bar using channels and spring-
loaded clamps. Mounting hardware is supplied with each system. When properly installed,
the mounting hardware maintains the position of the measuring head in the event of
temperature fluctuation and / or bus vibration.
An interconnection cable assembly is integral to each half of the Measuring Head. The
standard length is 33 feet (10 meters). Heads with extra-long interconnection cables are also
available - consult the factory for details. Standard measuring head cable assemblies are
terminated with keyed connectors to ensure correct hookup. The interconnection cables from
the measuring head are identified as “A” and “B”. Connecting head cable “A” to Metering Unit
“B” will not result in damage to the head or electronics, but may degrade the calibration
accuracy of the system.
2.3 ADDITIONAL METERING UNIT DETAIL
The Metering Unit electronics are housed in a NEMA 4X enclosure. The enclosure cover
must remain closed during normal operation. The Metering Unit is rated IP65, which
stipulates the following characteristics:
•Protection from electrical shock as hazardous voltages are inaccessible
•Limited ingress of dust into the enclosure
•Limited ingress of water into the enclosure via dripping, spray, or jets from any direction.

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The outside of the Metering Unit enclosure includes four receptacles for external connection
to the Measuring Head, the Metering Unit measurement signal(s) and relay outputs, and the
input of mains power. When properly mated with the associated cable assembly, these
connections are also environmentally protected. External power for the Metering Unit is
“universal input” type: 85 to 264Vac @ 47 to 440Hz, or 110 to 264Vdc. Wiring changes are
not required for any supply voltage in this range. Burden on the supply circuit will not
exceed 30VA.
Internally, all LKAT Plus Metering Units include both a power supply and a Main pc board.
These 2 PC boards are mounted to a steel chassis which is then mounted on a steel panel
housed in the enclosure. The Metering Unit enclosure door has a window made of clear
polycarbonate. This allows the user to view various LED (or LCD) status indicators while the
door is closed. For more information, refer to the “Theory of Operation” section of this
manual.
There are two optional pc board assemblies that may be added onto the Main PC board in
the LKAT Plus Metering Unit:
•The Protection Extensions (PE) pc board assembly
•The Display pc board assembly.
One or both of these pc board assemblies may be added to an LKAT Plus Metering Unit in
the field. It is not mandatory that they be factory installed and/or calibrated. The optional pc
board assemblies may be calibrated on site, using the LKAT Plus Main Output as the
reference measurement.
2.4 ADDITIONAL INDICATOR AND OUTPUT DETAIL
As noted on the specifications page, the LKAT Plus System Metering Unit includes several
visual indicators. These include:
•Accuracy Diagnostics (operational status) LEDs: green = OK, red = system problem (see
Section - “Theory of Operation”).
•Over / Reverse Current Trip status LEDs: green = measured current does not exceed the
setpoint, red = measured current exceeds the setpoint. (Optional) Illuminated LCD digital
display of measured current.
Available via the Metering Unit output cable:
•Isolated signal output proportional to bus current being measured. This output may be
configured for various zero and full-scale values.
•Normally open and normally closed relay contacts indicate Accuracy Diagnostics (AD)
operational status (same as green and red LEDs).
•Normally open and normally closed relay contacts indicate over / reverse current trip
status (same as green and red LEDs). For failsafe operation, the relay coil is energized in
the normal condition (no over / reverse trip).
The table below lists the features associated with the Main and PE pc board assemblies:
Table 2.1
Main and PE PC Board Assembly Features
Main PC Board
Assembly
with PE PC Board
Assembly
Isolated Output
1
1
Operational Status LEDs & Relay Contacts
1
0
Overcurrent / Reverse Trip Status LEDs & Relay
Contacts
1 2

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Each isolated output features:
•450Vrms working galvanic isolation
•Configurable scaling
•Configurable bias
Each Overcurrent / Reverse Current Trip Setpoint includes:
•Selectable Forward / Reverse protection
•Independently adjustable Trip Setpoint (field configurable)
•Status LEDs
•Status Relay Contacts
Checking field calibration of LKAT Plus Systems requires use of a reference current
transducer with calibration accuracy of 0.1% full-scale or better. Contact DynAmp, LLC for
calibration of the LKAT Plus System. Refer to “Maintenance and Spare Parts” section for
more information.
2.5 INTERCONNECTION CABLE DETAIL
The LKAT Plus system is supplied with two cable assemblies in addition to those connected
to the Measuring Head.
The power input cable assembly is 33 feet (10m) in length. A keyed circular connector
terminates one end for connection to the Metering Electronics. The other end is unterminated
for connection to the power source by the user during installation.
The system output cable assembly is 100 feet (30m) in length. A keyed circular connector
terminates one end for connection to the Metering Electronics. The other end is unterminated
for connection to customer instrumentation and system for control and protection. The
system output cable is a 17-conductor type. However, only 8 of the 17 conductors are used
when the optional PE pc board assembly is NOT installed. The unused conductors may be
trimmed flush to cable jacket. The user connects this cable from the Metering Unit to the
appropriate inputs during installation.