About Electrical Power Sensors
Electrical power sensors are used to measure characteristics of electric power such as voltage, current, power, and potential degradation of insulation due to age. For AC circuits, an electric power sensor can also be used to measure power quality. Some electrical power sensors are incorporated into transformers or other components of the power distribution grid. Others are added to existing systems. Typically, these electrical power sensors measure one or more physical characteristics and convert them to electrical signals. Basic electric power sensor categories include electrical capacitance sensors, electrical frequency sensors, electrical resistance sensors, and electrical conductance sensors.
Electrical power sensors use many different technologies to measure electrical characteristics. For example, Hall Effect sensors measure voltage, current, and power levels by using a current perpendicular to a magnetic field to cause an electric potential. To measure the condition of aging insulation, sensing methods include degree of polymerization, insulation resistance, power frequency dissipation factor, and polarization index measurement. Additional methods use voltage response measurements, in which the electrical characteristics of a circuit are determined from the amplitude and phase of a test current flowing through a circuit. To measure power quality, electrical power sensors measure the phase difference between voltage and current, as well as the resulting total harmonic distortion (THD).
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Engineering Web: Electrical Power Sensors
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Part Numbers for Electrical Power Sensors
| Part # | Distributor | Manufacturer | Product Category | Description |
|---|---|---|---|---|
| 1UZ75 | Grainger Industrial Supply | BRADY CORPORATION | Voltage Detectors | AC Sensor |
| FSL-K9 | Newark | ROHDE & SCHWARZ | Spectrum Analyzers | Power Measurement with NRP Power Sensors; For Use With:FSL series Spectrum Analyzers; Features:Requires mfg part no FSL-B5 Interfaces ir mfg part no NRP-Z3/4 RoHS Compliant: NA |
| E9304A | Newark | AGILENT TECHNOLOGIES | Signal Strength Meters | Power Sensor; Connector Type:N(m); Operating Temp. Min:0 C; Range:9 kHz to 6 GHz, -60 to +20 dBm RoHS Compliant: NA |
| E9323A | Newark | AGILENT TECHNOLOGIES | Signal Strength Meters | Power Sensor; Connector Type:N(m); Range:50 MHz to 6 GHz, 5 MHz bandwidth RoHS Compliant: NA |
| E9300A | Newark | AGILENT TECHNOLOGIES | Signal Strength Meters | Power Sensor; Connector Type:N(m); Operating Temp. Min:0 C; Range:10 MHz to 18 GHz, -60 to +20 dBm RoHS Compliant: NA |
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