поискавой системы для электроныых деталей |
|
CASR-6-NP датащи(PDF) 7 Page - LEM |
|
CASR-6-NP датащи(HTML) 7 Page - LEM |
7 / 24 page Fig. 6: Differential current measurement (I = I1 – I2), many possibilities 77 Higher insulation provided with the CKSR models thanks to their mechanical design The CKSR primary pin footprint is different to the CAS and CASR models. Thanks to this different primary footprint, higher creepage and clearance distances are achieved. This can be of interest when higher insulation is required for applications under higher working voltages than normal. Creepage and clearance distances for CKSR models are 8.2 mm (internal distances). Let’s take an example to see the advance this brings. Conditions of use: • Creepage distance: 8.2 mm • Clearance distance: 8.2 mm • CTI: 600 V (group I) • Overvoltage category: III • Pollution Degree: 2 Basic or Single insulation: According to EN 50178 and IEC 61010-1standards: With clearance distance of 8.2 mm and PD2 and OV III, the rated insulation voltage is of 1000 V RMS. With a creepage distance of 8.2 mm and PD2 and CTI of 600 V (group I), this leads to a possible rated insulation voltage of 1600 V RMS. In conclusion, the possible rated insulation voltage, in these conditions of use, is 1000 V RMS (the lowest value given by the both results from the creepage and clearance distances). Reinforced insulation: Let’s look at the reinforced insulation for the same creepage and clearance distances as previously defined: When looking at dimensioning reinforced insulation, from the clearance distance point of view, with OV III and according to EN 50178 and IEC 61010-1 standards, the rated insulation voltage is given whatever the pollution degree at 450 VRMS (interpolation) or 300 V RMS (without interpolation). From the creepage distance point of view, when dimensioning reinforced insulation, the creepage distance taken into account has to be the real creepage distance divided by 2, that is to say 8.2/2 = 4.1 mm. With that value, and PD2 and CTI of 600 V (group I), this leads to a possible rated insulation voltage of 800 VRMS. In conclusion, the possible reinforced rated insulation voltage, in these conditions of use, is of 450 VRMS (interpolation) or 300 VRMS (without interpolation)(the lowest value given by the both results from the creepage and clearance distances). Using only the EN 50178 standard as a reference for industrial applications, the possible reinforced rated insulation voltage in these conditions of use is of 600 VRMS. With CASR models, not using the special primary pins footprint, the clearance and creepage distances are each of 7.5 mm. In the same conditions of use as for the CKSR example here before, the result would be the following: According to EN 50178 and IEC 61010-1 standards: Basic or Single insulation ➔ Rated insulation voltage: 600 V RMS. Reinforced insulation ➔ Rated insulation voltage: 404 V RMS (interpolation) or 300 V RMS (without interpolation). With CAS models, not using the special primary pins footprint, the clearance and creepage distances are each of 7.7 mm (distances are higher compared to the CASR models as there are only 3 secondary pins versus 4 on the CASR models). In the same conditions of use as for the CKSR example here before, the result would be the following: According to EN 50178 and IEC 61010-1 standards: Basic or Single insulation ➔ Rated insulation voltage: 600 V RMS. Reinforced insulation ➔ Rated insulation voltage: 417 V RMS (interpolation) or 300 V RMS (without interpolation). (Note: all these calculations are done with creepage and clearance distances taken on the transducer itself not mounted on a PCB). The measurement of differential currents is also possible with special versions of CAS, CASR and CKSR (Fig. 6). These models are possible on request. The current measured is the difference of the currents I1 - I2. For insulation reasons (creepage and clearance distances), these models are designed in order to have enough space between the 2 primary conductors carrying the 2 opposite currents (due to the possible potential difference between the two phases). |
Аналогичный номер детали - CASR-6-NP |
|
Аналогичное описание - CASR-6-NP |
|
|
ссылки URL |
Конфиденциальность |
ALLDATASHEETRU.COM |
Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
Family Site : ic2ic.com |
icmetro.com |