DynAmp LKP Series Installation, Operation And Service Manual Download Page 44

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Installation, Operation and Service Manual

LKP Series 4 Channel OEM

Page 30

041593O

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Summary of Contents for LKP Series

Page 1: ...Phone 1 614 871 6900 www dynamp com Grove City Ohio 43123 USA Fax 1 614 871 6910 help dynamp com MODEL LKP SERIES 4 CHANNEL OEM DIRECT CURRENT METERING SYSTEMS Installation Operation and Service Manual Manual Item No 041593 Rev O ...

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Page 3: ... 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 1997 1998 1999 2000 2001 2002 2003 2004 2006 2008 201...

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Page 5: ...ING HEAD INSTALLATION _________________________________________9 4 4 INSTALLATION CONSIDERATIONS ________________________________________10 4 5 INSTALLATION PRECAUTIONS LIVE BUS __________________________________12 4 6 COMPLETING THE MEASURING HEAD INSTALLATION________________________12 4 7 METERING UNIT INSTALLATION __________________________________________14 4 8 METERING UNIT WIRING____________...

Page 6: ...1 FIGURES FORMS TABLES _______________________________________________________ Figure Title Page Figure 4 1 General Guidelines for Locating Measuring Heads 8 Figure 4 2 Window Insulation Description Typical for LKP 15 and LKP 30 Measuring Heads 9 Figure 4 3 Measuring Head Orientation 16 Figure 4 4 Magnetic Centering 17 Figure 5 1 Magnetic Null Detector Diagram 19 Table 3 1 LKP Series 4 Channel OEM...

Page 7: ...rements 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 ...

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Page 9: ...disconnected from the Measuring Head during installation The Measuring Heads are supplied with connector covers which must be used whenever the Measuring Head cables are disconnected from the Measuring Head The covers are necessary to prevent dust and water from entering the Measuring Heads The covers also prevent fingers from contacting the connector pins during installation which can carry hazar...

Page 10: ...ll result in intermittent operation and premature failure and will void the warranty Metering Unit enclosure doors and module covers must be present and remain closed at all times during operation to insure safety of personnel A set of keys is provided for locking enclosure doors Only authorized personnel or technicians should be permitted to open and service the unit Bus current must be zero when...

Page 11: ...stern 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 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 Novem...

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Page 13: ... 02 13 Rev F Revised Table 4 1 03 03 iii 5 7 16 18 Rev G Updated Warranty page and Installation paragraph Updated Table 3 2 4 3 09 03 all Rev H Update to DynAmp LLC 11 04 5 16 Rev I Update per ECO 3131 insert line regarding fusing of isolation transformer 10 05 v 1 26 28 Rev J Update fuse precautions per ECR 1304 07 06 33 K ECO 3166 update accuracy diagnostics drawings list 09 08 all Rev L PAR 102...

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Page 15: ...d 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 ...

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Page 17: ...ctor cables connected to each half of the Measuring Head On LKP 6 and LKP 12 models individual conductors from each half of the Measuring Head are brought out to an external terminal block which in turn is connected to the Metering Unit via a single cable All wires from the Measuring Head are color coded and clearly marked according to the interconnection diagrams supplied with this manual 2 3 ADD...

Page 18: ...drop across the terminals is 15 Vdc at the maximum current output of the bus b A standard voltage output at terminals TB1 32 TB1 31 The voltage is 100mV kA for models LKP 6 LKP 12 and 10mV kA for models LKP 15 LKP 30 c An additional voltage at TB1 36 TB1 35 when an optional shunt is installed A normally closed relay contact for accuracy diagnostics output at TB1 37 TB1 38 This feature is only avai...

Page 19: ...ead To Bus Isolation LKP 6 LKP 12 6kVac for 1 minute with 25mm air gap LKP 15 LKP 30 12kVac for 1 minute with 25mm air gap Installation Category III Pollution Degree 2 OUTPUTS Current output LKP 6 LKP 12 LKP 15 LKP 30 1 A 5 kA 0 2 full scale 1 A 5 kA 0 1 full scale Voltage output LKP 6 LKP 12 100mV per kA of bus current Voltage output LKP 1 LKP 30 10mv per kA of bus current Contingent upon DynAmp ...

Page 20: ...suring Head 13 2 335 x 13 2 335 LKP 15 30 Torque Head assembly bolts M8 tighten until snug head top half to bottom assembly Never exceed 14 N m 125 lb in NOTE The Measuring Head window insulation rating is directly proportional to the clearance of the head to the bus For instance a Measuring Head in direct contact with a bus will have an insulation rating of 300V LKP 6 LKP 12 or 6kV LKP 15 LKP 30 ...

Page 21: ...tic fields emanating from angled sections of the bus being monitored or from other nearby buses may cause overheating Currents from other buses produce magnetic fields which can sometimes cause zero offsets and errors at low current levels To guard against these problems a computer analysis of your bus system should be performed If a bus analysis is not feasible the guidelines presented in this se...

Page 22: ...ad should be a minimum distance of 2a from another bus carrying equal or less current If the other bus carries higher current the distance should be greater e g 3a If the Measuring Head is to be installed on a U section of the bus the distance between the parallel bus sections must be a minimum of 4a and the Measuring Head should be centered between them If the Measuring Head is to be installed on...

Page 23: ...ve any dirt particles from the Measuring Head part line insulation multi conductor connector and latch areas NOTE When installing the Measuring Head protect the window insulation from impact and do not let the weight of the Measuring Head rest upon the window insulation as it can be easily damaged Also the interconnecting cable is of top quality but it is not armored Protect it from abrasion and s...

Page 24: ...not exceed 55 C The standard Measuring Head is designed for indoor use only and should be kept away from high heat and corrosive atmospheres Protect the Measuring Head from direct sunlight which causes the Measuring Head temperature to rise thus limiting the upper operating range in some applications If the Measuring Head is to be installed in a harsh environment please discuss protective measures...

Page 25: ...low through the aperture to No damage will occur if the Measuring Head is reversed but an LKP system will not produce an output in this condition CAUTION The part line insulation pieces located on the mating surfaces of the Measuring Head contain sensitive electronic devices are brittle and can be easily damaged if one is not careful during installation I Make sure that the serial number on the to...

Page 26: ...nd all other leads This can best be accomplished by taping over the individual lead connections 6 7 8 9 10 11 12 13 Always follow all local and plant safety procedures WARNING If the installation is to be made on a live bus the Measuring Head cable leads must not contact ground or personnel A condition hazardous to the Measuring Head and any person handling uninsulated cable lead terminals will re...

Page 27: ...sired Value Ohms Desired Value Ohms Circuit LKP 15 LKP 30 CABLE TO A HALF OF HEAD 14 18 46 50 22 26 Coil Circuit Channel 1A 15 19 23 25 11 13 Coil Circuit Channel 2 16 20 46 50 22 26 Coil Circuit Channel 3A 4 BLK 5 W BLK 3 4 k 3 4 k Hall Current Channels 1 4 BLU 5 W BLU 3 4 k 3 4 k Hall Current Channels 2 6 7 240 550 240 550 Hall Signal Channel 1 8 9 240 550 240 550 Hall Signal Channel 2 CABLE TO ...

Page 28: ...the actual output circuit Terminate all conductors from the Measuring Head as shown in the interconnection diagrams in the back of this manual As an aid to wiring each conductor is identified by a numbered sleeve or imprinted numeral which corresponds to the correct terminal destination You should always use the wire numbers when making connections as wire colors may vary or appear different under...

Page 29: ...tween bus current and the output feedback current is 5000 1 If a test ammeter is not used read the current indicator across the shunt of the output circuit It is necessary to take a complete set of channel voltage readings These readings serve two purposes one to verify that all channels are operating properly and two to aid in magnetic centering of the Measuring Head With the bus current operatin...

Page 30: ...owable channel output of 35 V relates to the maximum heat dissipation that the channel can safely handle A reading of 25 V to 35 V makes a change in head position highly desirable A reading exceeding 35V makes a head position change necessary A reading of 70 75 V indicates a full on channel condition or a blown channel fuse and requires immediate action to resolve the problem A reading of 35 38 V ...

Page 31: ...voltages are measured as shown then the Measuring Head is to be moved as indicated until the best balance at opposite sides is obtained The final head position may yield voltages of 19 V at channels 1 and 3 and perhaps 13 V at channels 2 and 4 The channel voltages depend on several factors such as total bus current bus shape proximity to other bus bars and channel coil resistance In practice it ma...

Page 32: ... so long as each channel voltage falls within the limits of 3 V to 30 Vdc 3 V to 25 Vdc for LKP 12 Refer to Magnetic Centering section 4 10 Channel voltages are measured between terminals at the Metering Unit terminal block with the LKP in service on an energized bus INSTRUCTIONS 1 Measure between TB1 23 and the terminal corresponding to each channel e g TB1 14 for channel 1 2 Record the channel m...

Page 33: ... in the form of feedback current This current is passed through 5000 turns to produce the feedback field Figure 5 1 Magnetic Null Detector Diagram 5 3 MEASURING HEAD The Measuring Head contains many magnetic sensors and feedback coils Each set of sensors and the adjacent coils plus the associated amplifying section of the Metering Unit is termed a channel Each channel responds nearly independently...

Page 34: ...nt to the quad comparators U110 and U111 which are used to generate the firing pulses for the SCRs 5 7 ERROR AMPLIFIERS The error amplifier circuitry consists of U106 through U109 and associated circuitry The error amplifiers serve two purposes to amplify the Hall error signal and to filter it before sending it to the comparators 5 8 COMPARATORS AND PULSE GENERATOR The comparators consist of U110 ...

Page 35: ...circuit should be selected with care The wattage rating should be at least two times higher than the calculated power dissipation The burden resistor should have a low temperature coefficient 25 ppm or better 5 11 ACCURACY DIAGNOSTICS OPTIONAL ACCURACY DIAGNOSTICS AD is a system that assures the user that most internal circuits are operating properly and it is also a diagnostic tool It is made up ...

Page 36: ...This might cause the rectifier control circuit to inappropriately increase the power output perhaps to overload levels for either the power supply or the process So if the metering system is in the control loop and the Accuracy Diagnostics indicates a potential problem the following actions are recommended FIRST Lock out control actions that could drive the rectifier output higher and SECOND alert...

Page 37: ... the bus is turned down to zero In this case the accuracy diagnostics circuit is in an unstable condition and alarm faults as indicated by the channel LEDs should be ignored Note that in general the Metering Unit s 0 1 accuracy is only guaranteed when the primary bus current is above 5 of the full scale rating of the unit A relay contact output is available to connect to a remote warning system Th...

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Page 39: ...curacy performance Use appropriate measures to correct any problems found A Repeat voltage measurements given in Magnetic Centering procedure to ensure that no significant change has occurred from the data recorded at startup A large change in the amplifier output voltage of a given channel compared to other channels may indicate trouble in the channel If all channels change proportionally then th...

Page 40: ...lter should be cleaned or replaced according to the manufacturer instructions CAUTION To avoid the risk of shock and electrocution always disconnect the AC power and head cables from the Measuring Head before performing any cleaning or service operation on the Metering Unit Disconnect power to the system before servicing or replacing fuses 6 3 RECOMMENDED CALIBRATION VERIFICATION INTERVALS DynAmp ...

Page 41: ...ng Heads are very reliable and should require little or no repair over its service life Please refer to the nearest authorized DynAmp service center for information on repairs Table 6 1 Spare Parts List DESCRIPTION ITEM NO RECOMMENDED QUANTITY Metering Unit Kit Spare Parts LKP 6 OEM 42775 1 Kit Spare Parts LKP 12 OEM 42776 1 Kit Spare Parts LKP 15 OEM 42777 1 Kit Spare Parts LKP 30 OEM 42778 1 Spa...

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Page 43: ...nal Magnetic Field Errors replaces TEC727 9907 LKP LKB LKP and LKB Sensor Mounting Guidelines and Restrictions 9905 LKP LKB Recommended Calibration Intervals for LKP or LKB High Current Systems 9904 Diagnostics Self Diagnostics for DynAmp High Current Measurement systems Accuracy Diagnostics 987 LKP LKB Ferromagnetic Materials near LKP or LKB High Current Measurement Systems 749 Bus Analysis Compu...

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Page 45: ...bly Busbar Mounting Option LKP 15 30 and 45 02A109641 Assembly Mounting Feet LKP 15 30 45 60 80 and 100 02A108256 B Outline and Mounting LKP 4 Channel OEM Meter Unit 02B107928 Outline and Mounting LKP 6 Measuring Head 02A100425 E Outline and Mounting LKP 12 Measuring Head 02A100422 E Outline and Mounting LKP 15 Measuring Head 02A108019 A Outline and Mounting LKP 30 Measuring Head 02A108018 A Inter...

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