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Design overhead distribution systems
Design overhead distribution systems

... for long distance transmission, or some undersea cables, or for connecting two different ac networks. Electricity is transmitted at high voltages (110 kV or above) to reduce the energy lost in transmission. Power is usually transmitted as alternating current through overhead power lines. Underground ...
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YASKAWA AC Drive A1000
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Eaton 9E
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... Notice: It is required to install an external isolating device against current backfeed between Mains input and UPS. After the device is installed, it must add a warning label with the following wording or the equivalent on the external AC contactor: RISK OF VOLTAGE BACKFEED. Isolate the UPS before ...
Eaton 9390 UPS Brochure
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... are non-linear. When voltage is applied to a circuit constructed of non-linear components, the circuit may not respond linearly (current may not follow the voltage in a linear manner). These components may even create frequencies other than the fundamental applied frequency (60 Hz). These frequencie ...
Design and Analysis of Drive System with Slip Ring Induction Motor
Design and Analysis of Drive System with Slip Ring Induction Motor

L - ER Publications
L - ER Publications

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Magnetic Field Secrets and Neg-Entropy by Tim
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The course document
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Effective Estimation of Induction Motor Field Efficiency Based on On-site Measurements
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... Considering the results obtained, it can be stated with confidence that this simple fast and low-cost technique will yield virtually the same results as using the sophisticated standard tests. 4. CONCLUSION The proposed technique for estimating efficiency of induction motor in the field has been des ...
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... A buffer inserted behind this transistor would decrease the fanout to 1 and reduces the load capacitance the transistor has to drive. The buffer contains back to back inverters with steadily increasing transistor sizes. The extra large driving transistors in the buffer have a lower charging resistan ...
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Opto-isolator



In electronics, an opto-isolator, also called an optocoupler, photocoupler, or optical isolator, is a component that transfers electrical signals between two isolated circuits by using light. Opto-isolators prevent high voltages from affecting the system receiving the signal. Commercially available opto-isolators withstand input-to-output voltages up to 10 kV and voltage transients with speeds up to 10 kV/μs.A common type of opto-isolator consists of an LED and a phototransistor in the same opaque package. Other types of source-sensor combinations include LED-photodiode, LED-LASCR, and lamp-photoresistor pairs. Usually opto-isolators transfer digital (on-off) signals, but some techniques allow them to be used with analog signals.
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