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- Page 1 LKAT Plus EMC in MU BI-DIRECTIONAL HIGH CURRENT MEASUREMENT SYSTEM Installation, Operation and Service Manual Manual Item No. 047331 Rev. A DynAmp, LLC 3735 Gantz Road Phone +1 614.871.6900 www.dynamp.com Grove City, Ohio 43123 USA Fax +1 614.871.6910 help@dynamp.com...
- Page 2 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page ii 047331 A...
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Page 3: Dynamp, Llc Warranty
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). - Page 4 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page iv 047331 A...
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Page 5: Table Of Contents
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 SYSTEM OVERVIEW ...................... - Page 6 Installation, Operation and Service Manual LKAT Plus EMC FIGURES & TABLES Figure # Title Page 3.1 LKAT P ..................9 IGURE REQUENCY ESPONSE 1 LKAT P 1 – Z ......15 IAGNOSTIC EASUREMENTS RIMARY URRENT 2 LKAT P 2 – E ......
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Page 7: Hazard Warning
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. This equipment is designed to be connected to hazardous electric voltages. - Page 8 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page viii 047331 A...
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Page 9: Safety
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. - Page 10 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page x 047331 A...
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Page 11: Dynamp, Llc Customer Support & Service Assistance
Installation, Operation and Service Manual LKAT Plus EMC DynAmp, LLC Customer Support & Service Assistance For further assistance, contact DynAmp Customer Support at: Americas: Telephone: +1 614.871.6900 Fax: +1 614.871.6910 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 –... - Page 12 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page xii 047331 A...
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Page 13: Manual Revisions
Installation, Operation and Service Manual LKAT Plus EMC MANUAL REVISIONS Page Change Reason For Revision Date 06/18 4, 23 ECO # 3347 – Update MUT description and update Table 08/18 sevl 5.2 and general verbiage © 2018 DynAmp, LLC Page xiii... - Page 14 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page xiv 047331 A...
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Page 15: Handling And Storage
-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. © 2018 DynAmp, LLC Page 1... - Page 16 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page 2 047331 A...
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Page 17: Product Description
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. -
Page 18: Additional Measuring Head Detail
Installation, Operation and Service Manual LKAT Plus EMC • 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. -
Page 19: Additional Indicators And Outputs
• 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. -
Page 20: Interconnection Cables Detail
LKAT Plus System. Refer to “Maintenance and Spare Parts” section for more information. 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. -
Page 21: Specifications
Installation, Operation and Service Manual LKAT Plus EMC 3. SPECIFICATIONS Table 3.1 LKAT Plus System Specifications (Subject to change without notice) ANALOG SIGNAL OUTPUT – MAIN & PROTECTION EXTENSIONS Full-Scale Measuring Range (Main Output) ±5kA to ±100kA Contact factory for Full-scale measuring range >100kA... - Page 22 Installation, Operation and Service Manual LKAT Plus EMC Table 3.1 LKAT Plus System Specifications (Subject to change without notice), Continued STATUS INDICATORS PROTECTION EXTENSIONS PC BOARD ASSEMBLY (Optional) Overcurrent / Reverse Current Trip Setpoint - Independent, Continuously variable from 5% Qty.
- Page 23 Installation, Operation and Service Manual LKAT Plus EMC Table 3.1 LKAT Plus System Specifications (Subject to change without notice), Continued PHYSICAL Measuring Head Weight 2 to 8 lbs. (1 to 4 kg) Metering Unit Weight 8 lbs. (4 kg) Head Interconnection Cables (2) - 33 ft.
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Page 25: Installation
4. INSTALLATION HANDLING PRECAUTIONS LKAT Plus systems should be handled with the same care as any precision measuring instrument. Severe jolts or bumps to the Measuring Head or Metering Unit may cause movement of internal parts, and possibly a malfunction. Personnel involved in the installation should be familiar with the technical terms, warnings, and instructions in this manual, and all plant safety rules, and be able to follow these. -
Page 26: Off-Bus Functional Check (Optional)
After unpacking the LKAT Plus system (but prior to installation) the following functional check of the system is recommended: 1. Locate a convenient temporary power source for the LKAT Plus system. This may or may not be in the location where the system will be installed. The power source must be in the range 85 to 264Vac @ 47 to 440Hz, or 110 to 264Vdc for Standard AC/DC input power, or +24Vdc for Special Order +24Vdc input power. -
Page 27: Metering Unit Installation
Measuring Head. The following tools and materials may be required for installation: Materials marked with an asterisk ( * ) are included with each LKAT Plus System order. 34” (864mm) Releasable Cable Ties * Silicone RTV adhesive / sealant * 1/8”... -
Page 28: System Checkout
5. Connect Measuring Head cable assemblies to the Metering Unit. 6. Refer to the LKAT Plus System Wiring Diagram. The output cable assembly consists of #20 (20 AWG) twisted pair cable (8 pairs) with 17 (one contact position in output connector is unused) position circular connector on one end, and stripped, tinned wires on the other end. - Page 29 3.) Measure and record the information below (make additional copies of this form as needed). Record Serial Numbers. TEST CONDITIONS: ZERO PRIMARY CURRENT (Head may or may not be installed on bus); LKAT Plus SYSTEM must be ENERGIZED for AT LEAST ONE HOUR. (+) DMM (-) DMM ACCEPTABLE...
- Page 30 3.) Measure and record the information below (make additional copies of this form as needed). Record Serial Numbers and Current Loop Burden Resistance (Ohms). TEST CONDITIONS: ENERGIZED PRIMARY BUS ; LKAT Plus SYSTEM must be ENERGIZED for AT LEAST ONE HOUR. (+) DMM (-) DMM DATE...
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Page 31: Theory Of Operation
The term “open-path” indicates that the sensor is an air-core design, without magnetic core material. The LKAT Plus system operation is based on Ampere’s Law, which states: “the line integral of B (magnetic flux density) around any closed path is equal to µ... -
Page 32: System Functional Description
PCB (OPTIONAL) Display PCB (Optional) Figure 5.1 Block Diagram of the LKAT Plus System SYSTEM FUNCTIONAL DESCRIPTION The flux density associated with the primary current is sensed by arrays of Hall ICs in the Measuring Head. The outputs of these devices are summed and filtered, then transmitted to the Metering Unit where these signals are dc biased and scaled. -
Page 33: Lkat Plus Metering Unit
LKAT PLUS MEASURING HEAD INTERCHANGEABILITY DO NOT connect a LKAT² Measuring Head to an LKAT Plus Metering Unit – the LKAT² Head will not function properly, but not be damaged. LKAT Plus Measuring Heads of various sizes will operate properly when connected to the LKAT Plus Metering Unit. -
Page 34: System Calibration Overview
Laboratory Accreditation Bureau "Guidance for Documenting and Implementing ISO/IEC 17025:2005 and Laboratory Guidance." As a guideline, DynAmp recommends a 24-month interval of calibration for all permanently installed products and a 12-month interval of calibration for all products used in portable applications. -
Page 35: Calibration Adjustments
Generally, system calibration compares the output of the device under test (“DUT”) to a reference. The best calibration method is to return LKAT Plus Systems to the factory for calibration on a test bus in a very controlled environment with extremely stable and accurately measured current. - Page 36 The Optional PE and/or RMS Display pc board assemblies may be added, configured and calibrated in the field. In this case, the Main pc board assembly output signal is used as the reference output signal with the LKAT Plus System measuring normal bus current.
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Page 37: Field Configuration Of Trip Setpoints
The LKAT Plus is supplied with factory configured trip setpoints configured as specified in the LKAT Plus Worksheet at the time of order. If the trip setpoints are reconfigured in the field, the customer must realize that the trip setpoints shown on the LKAT Plus Metering Unit nameplate will no longer be correct. -
Page 38: Earth Grounding
Earth Ground. 5.11 CONFIGURING THE LOW PASS FILTER The LKAT Plus System includes a two pole configurable low pass filter. This filter may be enabled without affecting the scaling of the output in the pass band. The frequency response of the LKAT Plus without the low pass filter activated is shown in Figure 3.1. -
Page 39: Failsafe" / "Non-Failsafe" Configuration
(present on optional PE PCB assembly) are failsafe only. Table 5.3 shows the status of the LKAT Plus alarm relay contacts. The alarm relay contact condition is shown as it exists at the customer connections to the Metering Unit. - Page 40 Installation, Operation and Service Manual LKAT Plus EMC This Page is Intentionally Blank © 2018 DynAmp, LLC Page 26 047331 A...
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Page 41: Maintenance & Spare Parts
As is true with any electronic system, proper maintenance will tend to prolong the service life. DynAmp, LLC recommends the following program be performed at the recommended interval to prevent or detect damage to the LKAT Plus System and to ensure reliable performance. Always use appropriate measures to correct any problems found. Following the suggested maintenance schedule may assist in early diagnosis of problem(s) to minimize repairs and down time. -
Page 42: Spare Parts
Some cable assemblies for the LKAT Plus System include circular connectors. Others use solder cup connectors assembled with adhesive-lined shrink tubing covering the connector shell. -
Page 43: Drawings
7. DRAWINGS Table 7.1 Drawing List DRAWING TITLE NUMBER REVISION Wiring Diagram: LKAT Plus EMC System AC/DC Input Power 83B109612 Assembly: LKAT Plus EMC Metering Unit 75B109595 Assembly: LKAT Plus Main PCB Filtering added for EMC 75A109613 Assembly: LKAT PE PC Board with EMC Filtering...
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