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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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3UG3501 数据表(PDF) 73 Page - List of Unclassifed Manufacturers |
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3UG3501 数据表(HTML) 73 Page - List of Unclassifed Manufacturers |
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73 / 114 page  Monitoring Relays 7/73 Siemens LV 1 T · 2006 3UG Monitoring Relays for Electrical and Additional Measurements Current monitoring ■Overview The relays monitor single-phase AC and DC currents against the set threshold for overshoot and undershoot. They differ with regard to their measuring ranges and supply voltage types. ■Function 3UG46 21/3UG46 22 monitoring relays The 3UG46 21/3UG46 22 current monitoring relay is supplied with an auxiliary voltage of 24 V AC/DC or 24 to 240 V AC/DC and performs overshoot, undershoot or window monitoring of the current depending on how it is parameterized. The device is equipped with a display and is parameterized using three buttons. The measuring range extends from 3 to 500 mA or 0.05 to 10 A. The threshold values for overshoot or undershoot can be freely configured within this range. If one of these threshold values is reached, the output relay responds according to the set principle of operation as soon as the tripping delay time IDel has elapsed. This time and the ON-delay time onDel are adjustable from 0.1 to 20 s. The hysteresis is adjustable from 0.1 to 250 mA or 0.01 to 5 A. The device can be operated on the basis of either the open- circuit or closed-circuit principle and with manual or auto RESET. One output changeover contact is available as signaling contact. With the closed-circuit principle selected Current overshoot Current undershoot Window monitoring = 0 11/14 A1-A2 11/12 > Hysteresis Delay onDelay = 0 11/14 A1-A2 11/12 < Hysteresis Delay onDelay > 11/14 11/12 = 0 A1-A2 < Hysteresis Hysteresis Delay Delay Delay Delay = onDelay |
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