Danisense DS Series Product Manual
                       | |
Contents
| 
194.4 Derating of external measuring resistor RMThe external measuring resistor RM is a very important component to ensure the zero flux compen-sation and consequently a correct output current, refer to previous chapter 4.2.To avoid saturation of the current transducer, value of RM must be determined according to the de-rating curves shown in the individual datasheet. Below is an example of the derating curve for theDS400ID.e.g. at ambient temperature Ta = 25⁰C, the black curve shows that to measure up to 700A, RM mustbe less than 7.5ΩRED: Ta = 5⁰CBLUE: Ta = 25⁰CBLACK: Ta = 45⁰CGREEN: Ta = 65⁰CLIGHT BLUE: Ta = 85⁰CTa = 45⁰CRM= 7.5Ω4.5 Frequency deratingDanisense fluxgate current transducers offer extreme precision in DC and low frequency. However,they also have excellent frequency bandwidth relative to similar products in the market thanks to fastswitching speed of the fluxgate excitation circuit. High frequency AC current produces heat in the magnet-ic core. The frequency derating curves in the individual datasheets allow calculation of the max rms valueof the primary current at a given ambient temperature, without damaging the transducer. Below is an ex-ample of the frequency derating curves of the DS600ID.e.g. the blue curve shows that at ambient temperature Ta = 85⁰C and f = 10kHz, the max currentmeasurable without overheating the current transducer is around 70Arms only. However, if Ta = 65⁰C thebrown curve shows that the max current measurable at 10kHz is 600Arms.Ta = 65⁰CIp =70ArmsIp =600ArmsTa = 65⁰CTa = 45⁰C |
This manual is suitable for:
DL SeriesDL2000ID DL2000ID-CD100DL2000ID-CB100DL2000UB-10VDL2000UB-1VDQ SeriesDQ200-IDDQ500IDDQ600IDDQ640ID-BDS SeriesDS1000UB-10VDS200IDDS200ID-CD100DS200ID-CD1000DS200UB-10VDS200UB-1VDS300IDDS300UB-10VDS300UB-1VDS400IDDS400UB-10VDS400UB-1VDS50IDDS50UB-10VDS50UB-1VDS600IDDS600ID-CD100DS600UB-10VDS600UB-1V
manualsdatabase
Your AI-powered manual search engine