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Table of Contents
Summary of Contents for Kron WA
- Page 1 USER'S GUIDE Power Transducer WA / RA / WR Review I...
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Page 2: Table Of Contents
Product Installation Annex A: Product Coding 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 information herein is subject to changes without prior notice. -
Page 3: Introduction
Term of Warranty Kron Instrumentos Elétricos Ltda ensures that its products are strictly calibrated and tested, 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. -
Page 4: Technical Features
Output Ripple: <0.5% (regarding full Alternated: 110 – 220 Vac (± 15%) scale) Continuous: 12 – 24 – 48 – 125 Vdc (± 20%) Response Time: < 400ms (others under consultation) Maximum power consumption: 5VA Standardizing According to NBR 8145. KRON Instrumentos Elétricos... - Page 5 User's Guide Power Transducer Review I Product's Dimensions Dimensions in millimeters (mm). Tolerance: ±0.5mm KRON Instrumentos Elétricos...
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Page 6: Wiring Diagrams
User's Guide Power Transducer Review I Wiring Diagrams Single element, two-wire transducer WA or RA models KRON Instrumentos Elétricos... -
Page 7: Single Element, Two-Wire Transducer - Wr
User's Guide Power Transducer Review I Single element, two-wire transducer WR model KRON Instrumentos Elétricos... -
Page 8: Two Elements, Three-Wire Transducer - Wa Or Ra
User's Guide Power Transducer Review I Two elements, three-wire transducer WA or RA models KRON Instrumentos Elétricos... -
Page 9: Two Elements, Three-Wire Transducer - Wr
User's Guide Power Transducer Review I Two elements, three-wire transducer WR model KRON Instrumentos Elétricos... -
Page 10: Three Elements, Four-Wire Transducer - Wa Or Ra
User's Guide Power Transducer Review I Three elements, four-wire transducer WA or RA models KRON Instrumentos Elétricos... -
Page 11: Three Elements, Four-Wire Transducer - Wr
User's Guide Power Transducer Review I Three elements, four-wire transducer WR model KRON Instrumentos Elétricos... -
Page 12: Analog Output
The 4-20mAdc signal is an interesting manner to check if the transducer is, indeed, working, as even if there is no input or if it equals 0, it should provide a 4mAdc output. KRON Instrumentos Elétricos... - Page 13 (the resistance allowed for a 0-1mAdc transducer is different from that allowed for a 0- 10mAdc, for such, refer to the table available in the Output burden limits topic). KRON Instrumentos Elétricos...
- Page 14 In this case, the value to be used in F.S. calculation is that of the primary between these transformers. Example I WA Transducer (Active Power) – 3 elements, 4 wires – Input: 115Vac / 5Aac – Output: 4-20mAdc Uses VT 13800/115Vac and CT 200/5Aac F.S.
- Page 15 For reactive output (VAr), the interpretation is the same, changing only the unit (VAr instead of W). Example IV WA Transducer (Active Power) – 3 elements, 4 wires – Input: 115Vac / 5Aac – Output: 4-20mAdc – C.F. (Calibration factor) = 0.941 Uses VT 13800/115Vac and CT 200/5Aac F.S.
- Page 16 For the other signals, without suppressed zero, it is also possible the execution of bi-direction type, however, the operation will be in this manner: Bi-direction output example: -1..0..1mAdc 0mAdc = 0W -1mAdc = F.S. negative 1mAdc = F.S. positive KRON Instrumentos Elétricos...
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Page 17: Product Installation
The rated section of the wire to be used should consider the transducer's rated current (1Aac or 5Aac), the distance to the CT and the CTs' rated burden. Commonly are used 2.5mm² or 4mm² section cables. KRON Instrumentos Elétricos... - Page 18 5. Output connection Depending of the transducer model, it makes available one or two analog outputs (WA and RA – 1 output, WR – 2 outputs) used for measuring the power of the system where the transducer is connected. More detail on how this 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.
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Page 19: Annex A: Product Coding
For correct product specification, it is possible to define a 11-characters code that facilitates the product purchase and later interaction with the Technical Support. Code: Meaning: Fixed. Means that the product is a transducer 30 – WA Active Power Transducer 31 – RA Reactive Power Transducer 32 – WR...
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