HiTeC & Yokogawa - emitec-industrial.ch

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eleCTroniC CurrenT SenSorS Measuring aC including DC Current the preferred current connection for power meters is the power meter direct current input. Up to 50Arms this is no problem but higher currents generate much heat in the internal shunt, making the measurement inaccurate, due to temperature drift. ■ measures Ac + Dc currents at the same time ■ Isolated from the primary circuits ■ Very high stability and accuracy ■ high bandwidth ■ Also available in clamp type ■ Saturation detection circuit with automatic reset after over current ■ can be switched on with current already present when connected External current sensors For higher currents the only solution is to make use of external current sensors. Current sensors are widely available, but current sensors for accurate energy and power measurements are scare. A current sensor for electrical power measurements needs to have specifications for its internal phase shifts at different frequencies.
zero-flux TM CurrenT SenSor TYPeS MaCC plus - external current sensor This is the most popular current sensor available, with a 1000:1 current transfer ratio for maximal 850Apk (600Arms). In case of DC currents, max. 600Adc can be measured continuously. Also types with voltage outputs are available; ■ 100Apk/10Vpk and 200Apk/10Vpk & 500Apk/10Vpk. ■ With overload capacity of 20%, sinusoidal currents can be measured of respectively 85Arms, 170Arms and 430Arms. ■ Maximum continuous DC currents are the same as the ACpeak limits. Can be used with the junction unit HUB4MACC to minimize wiring. The “current-in/current-out” type has preference over the “current in/voltage out” type, mainly because of better noise behaviour of the signals between the junction unit and the low impedance of the power meter current shunt. SC1000 - Split Core zero-flux TM current measuring system Often it is not possible or allowed to switch-off a motor used in a production facility or in a critical safety environment like a nuclear power plant. Also it can be inconvenient and costly to remove and replace eyelets of thick power cables in order to run them through the sensor hole. The new SC1000 high precision split-core current sensor solves these issues. ■ Measures primary currents up to 1000Apk (700Arms). ■ Transfer ratio is 1000Apk/0.5Apk or 1000Apk/10Vpk in case of a voltage output. ■ The SC1000 can be used with the junction unit HUB4MACC to minimize wiring. CuraCC - zero-flux TM current measuring system If 1000Apk (700Arms) is not enough, then there is the CURACC-series, up to 6000Apk (4240Arms) for “current-in current-out”. Up to and including 2000Apk (1400Arms) we advise the head model B encapsulated, a resin encapsulated head that is more robust for industry applications. Between 2000Apk (1400Arms) and 6000Apk (4240Arms) the head model E with side plates is advised for easy mounting and robustness. ■ Output current always 1Apk at the primary peak current level as defined by the customer. ■ In case of DC currents, max. 2000Adc (model B) resp. 6000Adc (model E) can be measured continuously. ■ Can be used with the junction unit SUM3 or SUM4 to minimize wiring. for every application there is a solution. please contact your local Yokogawa or hitec representative if you have even more demanding applications. The input current producing the specified output signal (1A or 10V) can be chosen between ±150Apk and ±6000Apk. Example: A CURACC ordered with a transfer ratio 500A/1A can measure currents from -500Apk to +500Apk, producing -1Apk to +1Apk at the output. 5
Page 1: zero-flux TM CurrenT SenSorS & PreC
Page 6 and 7: Power MeTerS & analYSerS reliable m
Page 8 and 9: why an external Zeroflux tm current
Page 10 and 11: large HaDron ColliDer aT Cern, SwiT
Page 12 and 13: zero-flux TM CurrenT SenSor DiagraM
Page 14 and 15: general SPeCifiCaTionS hitec curren
Page 16: euroPean HeaDQuarTerS Yokogawa euro

HiTeC & Yokogawa - emitec-industrial.ch

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