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Installation, Operation and Service Manual 

 

 

 

LKAT

2

 +24V 

 

 

 

© 2018 DynAmp, LLC       

       

Page 24 

046404 E

 

Optional PE PCB – Current Loop Output 

•

 

Output Bias (coarse) : SW4  

•

 

Output Type : SW5  

•

 

Output Gain (coarse) : SW1 and SW2 

•

 

Output Bias (fine) : Trimpot 

•

 

Output Gain (fine) : Trimpot 

Optional PE PCB – Trip 2 & 3 Setpoints 

•

 

Trip 2 Protection Polarity : SW3  

•

 

Trip 2 Setpoint : R33 (medium) and R46 (fine) 

•

 

Trip 3 Protection Polarity : SW3  

•

 

Trip 3 Setpoint : R34 (medium) and R47 (fine) 

Optional RMS Display PCB – Display 

•

  Decimal Point position  

•

  DPM Mode  

•

  RMS Signal Conditioning Options : SW1F, G, & H (SW1-6, 7, & 8) 

•

  Input Scale Factor : SW1E (SW1-5) 

•

  Input Attenuation : SW1A, B, C, & D (SW1-1, 2, 3, & 4) 

•

  DPM Gain (fine) : R12 

 

NOTE

 

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

2

 System measuring normal bus current. 

 

Содержание LKAT2

Страница 1: ...r DynAmp 2 LKAT 24V BI DIRECTIONAL HIGH CURRENT MEASUREMENT SYSTEM with RECTIFIER PROTECTION FUNCTION lnstallation Operation and Service Manual Manual ltem No 046404 Rev E DynAmp LLC ...

Страница 2: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page ii 046404 E This Page is Intentionally Blank ...

Страница 3: ...ole 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 2014 2016 2017 2018 DynAmp LLC All rights reserved Reproduction in any manner whatsoever for purposes other than installation operation o...

Страница 4: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page iv 046404 E This Page is Intentionally Blank ...

Страница 5: ...t 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 ...

Страница 6: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page vi 046404 E This Page is Intentionally Blank ...

Страница 7: ...nclosure 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...

Страница 8: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page viii 046404 E This Page is Intentionally Blank ...

Страница 9: ...ime 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 1 614 871 6906 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 ...

Страница 10: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page x 046404 E This Page is Intentionally Blank ...

Страница 11: ...B ECR 2029 Detail added to Form 1 2 showing pin numbers 09 16 vi v 9 10 14 29 30 31 C ECO 3337 Delete fuse references input power voltage Meter Unit item number drawing list 01 17 ECR 2177 Update drawing 75A109415 Rev A to B 10 17 5 27 31 D ECO 3346 Update MUT description Non Failsafe and drawings 07 18 25 31 E ECR 2225 Regroup terms of equation 5 2 for clarification remove drawing 75A109415B 09 1...

Страница 12: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page xii 046404 E This Page is Intentionally Blank ...

Страница 13: ...ETAIL 7 3 SPECIFICATIONS______________________________________________________________9 4 INSTALLATION_______________________________________________________________13 4 1 HANDLING PRECAUTIONS 13 4 2 INSTALLATION CONSIDERATIONS 13 4 3 OFF BUS FUNCTIONAL CHECK Optional 14 4 4 MEASURING HEAD INSTALLATION 14 4 5 METERING UNIT INSTALLATION 15 4 6 SYSTEM CHECKOUT 16 5 THEORY OF OPERATION ______________...

Страница 14: ...urements Form Energized Primary Bus 18 Figure 5 1 Block Diagram of the LKAT2 System 20 Table 2 1 Main and PE PC Board Assembly Features 7 Table 3 1 LKAT2 System Specifications subject to change without notice 9 Table 5 1 Troubleshooting an Accuracy Diagnostics Fault Indication 22 Table 5 2 Trip Configuration Details 25 Table 5 3 Low Pass Filter Switch Settings 26 Table 5 4 LKAT2 Alarm Relay Status...

Страница 15: ...er 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 ...

Страница 16: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page 2 046404 E This Page is Intentionally Blank ...

Страница 17: ...DARD FEATURES True bi directional performance Ideal for difficult magnetic applications No head position or bus analysis needed Extremely compact with excellent environmental specifications for installation flexibility inside or outside Multiple standard switch selectable measurement output signals including mA mV and V Standard Accuracy Diagnostics AD continuously monitors system performance prov...

Страница 18: ...s For example the primary LKAT2 output may be scaled to 50kA to provide the highest degree of accuracy and resolution for normal rectifier control The second PE output may be scaled to 75kA to provide the information to intelligently manage overcurrent situations Using this signal the rectifier control system could integrate overcurrent operation to allow 5 minutes at 110 1 minute at 120 10 sec at...

Страница 19: ...nality 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 t...

Страница 20: ...d 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 an environm...

Страница 21: ... Board Assembly Features Main PC Board Assembly with PE PC Board Assembly Isolated Output 1 1 for 2 total Operational Status LEDs Relay Contacts 1 0 for 1 total Overcurrent Reverse Trip Status LEDs Relay Contacts 1 2 for 3 total Checking field calibration of LKAT2 Systems requires use of a reference current transducer with calibration accuracy of 0 1 full scale or better Contact DynAmp LLC for cal...

Страница 22: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page 8 046404 E This Page is Intentionally Blank ...

Страница 23: ...y 50ppm C or better Mains Voltage Sensitivity 0 001 V At DynAmp reference conditions Ambient 25 C 2 C 77 F 4 F Mains 18 36Vdc MAIN STATUS INDICATORS Accuracy Diagnostics Indicates LKAT 2 System proper operation or operational problem Accuracy Diagnostics Status LEDs Green LED indicates proper operation Red LED indicates operational problem Accuracy Diagnostics Status Relay Function Relay coil de e...

Страница 24: ...m ambient temperature of metering unit to 50 C GENERAL Input Power any voltage within the specified range can be connected without any wiring changes 18 36Vdc Burden on Mains max 30 VA Working Voltage Signal Output to Metering Unit Low Voltage Circuit 450Vrms Working Voltage Bus to Metering Unit Low Voltage Circuit 1500Vdc Working Voltage Mains Supply to Metering Unit Low Voltage Circuit 264Vrms W...

Страница 25: ...h connector for Meter Unit on opposite end Standard Length Signal Output Cable 1 Optional custom lengths are available 30m 100 ft Connector for Metering Unit on one end unterminated on opposite end Standard Length Power Input Cable 1 Custom lengths are available 10m 33 ft Connector for Meter Unit on one end unterminated on opposite end Figure 3 1 LKAT2 Frequency Response Normalized LKAT Bandwidth ...

Страница 26: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page 12 046404 E This Page is Intentionally Blank ...

Страница 27: ...he LKAT2 Measuring Head may be located in doors or outdoors but should be kept away from extreme heat and solvents Head installations in direct sunlight are not recommended as excessive temperature rise could result in measurement error or damage to the head enclosure If the head is to be installed in an especially harsh environment please contact the factory to discuss special requirements 4 No p...

Страница 28: ... system one hour to stabilize prior to making measurements Make measurements and record data shown on the form File the completed test form for future reference It is OK to make these measurements away from location where the LKAT2 System will be installed but this should be noted on the form 4 4 MEASURING HEAD INSTALLATION The head halves are mated together around the bus The Measuring Head is co...

Страница 29: ... the elbows 6 Install the four locking screws on the outside of the square tubes adjacent to the place where the head halves split apart Do not over tighten the locking screws Refer to Outline Mounting LKAT2 Measuring Head drawing 7 Tighten the bus mounting screws a few turns at a time in a circular pattern around the aperture of the head on the front side then on back side of the head For most ap...

Страница 30: ...tion of this manual Energize the rectifier to the desired test current Calculate the expected Metering Unit output signal magnitude at the test current The measured Metering Unit output signal magnitude should be equal to or very close to the expected value that was calculated If the Digital Display option is included in the Metering Unit the displayed kA level should also be equal to or very clos...

Страница 31: ...EST CONDITIONS ZERO PRIMARY CURRENT Head may or may not be installed on bus LKAT2 SYSTEM must be ENERGIZED for AT LEAST ONE HOUR MEASURE DMM at DMM at ACCEPTABLE RANGE DATE ____ ____ ___ DATE ____ ____ ____ DATE ____ ____ ___ VHall Supply A P4 1 P4 3 12V 0 5V VHall Supply A P4 2 P4 3 12V 0 5V 15V supply P4 4 P4 5 15V 0 5V 15V supply P4 6 P4 5 15V 0 5V Input A1 P1 1 P1 2 0V 5mV Input A2 P1 3 P1 2 0...

Страница 32: ...GIZED PRIMARY BUS LKAT2 SYSTEM must be ENERGIZED for AT LEAST ONE HOUR MEASURE DMM at DMM at ACCEPTABLE RANGE DATE ____ ____ ___ DATE ____ ____ ____ DATE ____ ____ ___ VHall Supply A P4 1 P4 3 12V 0 5V VHall Supply A P4 2 P4 3 12V 0 5V 15V supply P4 4 P4 5 15V 0 5V 15V supply P4 6 P4 5 15V 0 5V Input A1 P1 1 P1 2 Within 25mV of Input A2 Input A2 P1 3 P1 2 Within 25mV of Input A1 Input B1 P2 1 P2 2...

Страница 33: ... not generate an opposing magnetic field to null the field produced by the primary conductor inside the Measuring Head The term open path indicates that the sensor is an air core design without magnetic core material The LKAT2 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 µOI permeability multiplied by current...

Страница 34: ...isplay Display PCB Optional 19 99 Figure 5 1 Block Diagram of the LKAT2 System 5 3 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 The Accuracy Diagnostics status LEDs and rel...

Страница 35: ...rcurrent protection as well as MOV overvoltage clamping The power supply provides outputs of 15Vdc and 12Vdc required by the system electronics These outputs connect to the Main pc board assembly via a short wire harness Connections to the Measuring Head are made via the Main pc board assembly 5 5 LKAT2 MEASURING HEAD INTERCHANGEABILITY DO NOT connect LKAT Classic or LKAT Plus Measuring Head to an...

Страница 36: ...d user of the product is responsible for identifying the appropriate interval between calibrations The intervals should be determined based on the following factors Requirements of a Quality Management System Accuracy and permissible limits of errors Purpose and usage Experience with similar products Manufacturer s recommendations Stability of the product Past history Other characteristics of the ...

Страница 37: ...Opti Cal system is better suited for this purpose Field calibration accuracy depends on the stability of the test bus current the accuracy of the reference current measurement system and ammeters as well as the linearity of the LKAT2 System 5 8 CALIBRATION ADJUSTMENTS IMPORTANT NOTE To avoid injury and or electrical shock personnel performing calibration must review and observe all hazard warnings...

Страница 38: ...R46 fine Trip 3 Protection Polarity SW3 Trip 3 Setpoint R34 medium and R47 fine Optional RMS Display PCB Display Decimal Point position DPM Mode RMS Signal Conditioning Options SW1F G H SW1 6 7 8 Input Scale Factor SW1E SW1 5 Input Attenuation SW1A B C D SW1 1 2 3 4 DPM Gain fine R12 NOTE The Optional PE and or RMS Display pc board assemblies may be added configured and calibrated in the field In ...

Страница 39: ... or complete test stand the following method can be used Refer to Table 5 2 Trip Configuration Details Measure the existing setpoint voltage VSTPT use the equation below to calculate the new setpoint voltage Adjust coarse and fine potentiometers to produce calculated New VSTPT New Trip Current New VSTPT Old Trip Current X Old VSTPT Example Old VSTPT 7V Old Trip Current 70kA New Trip Current 80kA 8...

Страница 40: ...ere is no electrical connection from any part of the LKAT Main PCB or its optional daughter PCBs to Earth Chassis ground or the steel PCB mounting bracket or panel There is no electrical connection between the steel PCB mounting bracket or panel to Earth Ground 5 11 CONFIGURING THE LOW PASS FILTER The LKAT2 System includes a two pole configurable low pass filter This filter may be enabled without ...

Страница 41: ...ip1 relay contacts can be configured for Non Failsafe operation AD relay contacts are failsafe only Trip2 and Trip3 relay contacts present on optional PE PCB assembly are failsafe only Table 5 4 shows the status of the LKAT2 alarm relay contacts The alarm relay contact condition is shown as it exists at the customer connections to the metering unit To convert the LKAT2 System Trip1 to non failsafe...

Страница 42: ...Installation Operation and Service Manual LKAT2 24V 2018 DynAmp LLC Page 28 046404 E This Page is Intentionally Blank ...

Страница 43: ...in the Installation section of this manual at least once per year to verify performance of the LKAT2 System This may help to prevent or detect damage to the system and to ensure reliable performance Use appropriate measures to correct any problems found If LKAT2 System equipment is exposed to extreme temperatures DynAmp LLC recommends these steps be performed during the hottest time of the year In...

Страница 44: ...tors may also be installed after routing head interconnection cables in conduit Over molded replacement cable assemblies may be purchased for the power input and output cables Head cable connector s must be replaced by field installable type s or with a new head Refer to Spare Parts List Table 6 1 The LKAT2 System Measuring Heads require special repair procedures and materials However the heads ar...

Страница 45: ...ing Diagram LKAT2 System Low Voltage Version 83B109318 E Assembly LKAT2 Metering Unit Low Voltage Version 84B109279 B Assembly LKAT2 Main PCB 75A109352 B Assembly LKAT Protection Extensions PCB 75A108587 D Assembly LKAT RMS Display PCB 75A108588 C Outline and Mounting LKAT2 Measuring Head 02B109349 E Outline and Mounting LKAT2 Metering Unit 02B109280 C ...

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