Search results
Results from the WOW.Com Content Network
Two major sensing devices based on Faraday’s law are Current transformers (CTs) and Rogowski coils. These sensors provide an intrinsic electrical isolation between the current to be measured and the output signal, thus making these current sensing devices mandatory, where safety standards demand electrical isolation.
As most applications requiring computation are now performed by small digital computers, the remaining useful application is in power sensing, which combines current sensing with voltage sensing in a single Hall effect device. By sensing the current provided to a load and using the device's applied voltage as a sensor voltage it is possible to ...
An ammeter shunt is a special type of current-sensing resistor, having four terminals and a value in milliohms or even micro-ohms. Current-measuring instruments, by themselves, can usually accept only limited currents. To measure high currents, the current passes through the shunt across which the voltage drop is measured and interpreted as ...
hex current sensing interface gates 14 SN74LS63: 74x64 1 4-3-2-2-input AND-OR-Invert gate 14 SN74S64: 74x65 1 4-3-2-2 input AND-OR-Invert gate open-collector 14 SN74S65: 74x67 1 AND gated J-K master-slave flip-flop, asynchronous preset and clear (improved 74L72) (16) BL54L67Y: 74L68 2 dual J-K flip-flop, asynchronous clear (improved 74L73) (18 ...
Disadvantages of voltage-sensing devices over current-sensing: A wire break in the fault to load section, or in the earth to ground section, will disable operation of the devices. Requirement of an additional third wire from the load to the devices. Separate devices cannot be grounded individually.
Four-point measurement of resistance between voltage sense connections 2 and 3. Current is supplied via force connections 1 and 4. In electrical engineering, four-terminal sensing (4T sensing), 4-wire sensing, or 4-point probes method is an electrical impedance measuring technique that uses separate pairs of current-carrying and voltage-sensing electrodes to make more accurate measurements ...
IEC TR 60755 General requirements for residual current operated protective devices; IEC 60756 Non-broadcast video tape recorders – Time base stability; IEC 60757 Code for designation of colours; IEC 60758 Synthetic quartz crystal – Specifications and guidelines for use; IEC 60759 Standard test procedures for semiconductor X-ray energy ...
An ammeter shunt is a special type of current-sensing resistor, having four terminals and a value in milliohms or even micro-ohms. Current-measuring instruments, by themselves, can usually accept only limited currents. To measure high currents, the current passes through the shunt across which the voltage drop is measured and interpreted as ...