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User's Guide

Power Transducer

Review I

KRON Instrumentos Elétricos

10

Three elements, four-wire transducer
WA or RA models

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Summary of Contents for RA

Page 1: ...USER S GUIDE Power Transducer WA RA WR Review I ...

Page 2: ... Two elements three wire transducer WA or RA 8 Two elements three wire transducer WR 9 Three elements four wire transducer WA or RA 10 Three elements four wire transducer WR 11 Analog Output 12 Product Installation 17 Annex A Product Coding 19 The information herein has the purpose of helping in the correct use and specification of WA RA and WR Power Transducers Due to continued improvement the in...

Page 3: ...ted committing itself to repair them if possible manufacture faults occur One 1 year warranty From the product s purchase date upon confirming the purchase invoice The warranty does not cover Devices that have been tampered with Disassembled or opened by unauthorized personnel Damaged by overcharge or installation error Used in a negligent or improper manner Damaged by any kind of accident Mainten...

Page 4: ...ion 0 2VA Auxiliary or external supply To be defined in the order between these options Alternated 110 220 Vac 15 Continuous 12 24 48 125 Vdc 20 Maximum power consumption 5VA Environmental Conditions Working Temperature 10 to 60º C Operating Moisture 0 95 no condensing Temperature coefficient 0 01 C Mechanical Features Fastening With screws 4 in the panel background Housing Special extruded alumin...

Page 5: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 5 Product s Dimensions Dimensions in millimeters mm Tolerance 0 5mm ...

Page 6: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 6 Wiring Diagrams Single element two wire transducer WA or RA models ...

Page 7: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 7 Single element two wire transducer WR model ...

Page 8: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 8 Two elements three wire transducer WA or RA models ...

Page 9: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 9 Two elements three wire transducer WR model ...

Page 10: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 10 Three elements four wire transducer WA or RA models ...

Page 11: ...User s Guide Power Transducer Review I KRON Instrumentos Elétricos 11 Three elements four wire transducer WR model ...

Page 12: ...of input x output graph in a transducer with 12000W as full scale and 4 20mAdc output Note that under 0W we have 4mAdc in output and under 12000W we have 20mAdc in output Regarding the output types there are two models 1 Current type signal It is a signal in the form of current This is widely used in systems where the module that will receive the signal is away from the transducer once the voltage...

Page 13: ...ch as a digital gauge and a PLC For current output transducers the instruments should be connected in series according to the illustration below On the other hand for voltage output transducers the instruments should be connected in parallel The equivalent resistance of the devices to be connected should always be calculated in order to verify if there will not be output saturation of the transduc...

Page 14: ...r 1 single phase x C F F S Full Scale It is the transducer s input voltage expressed in its front panel It is the transducer s input current expressed in its front panel Use the factor 1 for single phase transducers and the 1 732 factor for three phase transducers It is the calibration factor When not specified by the client it is defined as 1 It is always a value between 0 5 and 1 2 Commonly curr...

Page 15: ...ac the voltage is directly connected In this case we ll have two full scales one of them regarding the active power and the other the reactive power but both with the same value F S 440 x 1000 x 1 W F S 440 000 W F S 440 kW Reading interpretation 0Vdc 0W 10Vdc 440kW For reactive output VAr the interpretation is the same changing only the unit VAr instead of W Example IV WA Transducer Active Power ...

Page 16: ...ave an active power whose signal is negative it will not carry out measurement The bi direction model on the other hand works with two scales in its output one of them positive and the other negative Bi direction output example 4 12 20mAdc 12mAdc 0W 4mAdc F S negative 20mAdc F S positive For the other signals without suppressed zero it is also possible the execution of bi direction type however th...

Page 17: ...e use of a 0 250mA external fuse as protection of the transducer s voltage inputs It is also recommended the use of terminal blocks allowing to move the transducer for a future calibration and or possible maintenance without the need of turning the system off It is recommended the use of wire with 1 5mm minimum rated section 4 Current signals connection The current signals connection directly or t...

Page 18: ...is output should be interpreted and also on how the choice for voltage and or current output types should be made are explained in the chapter Analog Output The choice of cable section to be used should consider information such as the distance between the transducer and the equipment that will receive the signal and the current level and or voltage to be used Voltage type outputs e g 10Vdc should...

Page 19: ...ent 2 wires F N 2 Delta three phase 2 elements 3 wires 3 Wye three phase 2 5 elements 4 Wye three phase 3 elements 4 wires 5 Single phase 1 element 2 wires F F Voltage input 11 110V 15 115V 20 150V 38 380V 50 115 99 According to order The voltage to be informed is always phase phase Current input 1 1A 5 5A Frequency 1 60Hz 3 50Hz 2 According to order Output 1 0 1mAdc 0 10k 2 0 5mAdc 0 2k 3 0 10mAd...

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