Size:2.1 Vmax RMS, 20 A Maximum Input Current This CR Magnetics CR8400 series current transformer is suitable for use in industrial automation systems. The transformer is epoxy-encapsulated with a polypropylene resin case, and has two wire leads for connection. This current transformer is Underwriters Laboratories (UR) Recognized and Conformité Européenne (CE) certified for quality assurance, and is suitable for sensing alternating current (AC) loads.SpecificationsFrequency Range20-1,000 HzInsulation Voltage3,500 VACOperating Temperature-40 C to 85 CCR Magnetics manufactures electrical sensors, indicators, and displays. The company, founded in 2004, is headquartered in Saint Louis, MO.
J**G
Exactly what I needed... CR8449-1000
It would be kind of unusual for anyone to buy these who doesn't know how to use them... My application was as a current monitor for a household AC generator hookup. For those who don't know, current transformers require a load resistor that is not part of this purchased coil part. The load resistor is placed across the output of the coil, and the AC voltage across the resistor is proportional to the current flowing through the wire at the center of the coil. The value of the load resistor and the design of the coil will determine the range of current that can be measured. I've scaled mine using the CR8449-1000 coil so that 1 Volt RMS output means that 10 Amps of current is flowing through the wire. (If anyone cares, I used a 101.6 Ohm, 1 Watt resistor to measure a 30 Amp circuit. Over-design the power handling of the load resistor, you don't want it getting hot!) This works well, and does exactly what I need it to.
K**E
Five Stars
Hooked this up to an ESP32 to monitor when my sump pump turns on. Worked perfectly.
J**R
Five Stars
Great little CT! Nice small tidy package with a 20A capacity. Perfect size for my power metering project.
B**.
One Star
didn't work, not sure if it is the transformer or meter
Trustpilot
2 months ago
2 weeks ago
