How do the functions of the 3390 and 3390-10 differ?
The 3390 and 3390-10 do not differ in terms of functionality. The 3390-10 provides high-accuracy performance for the following ranges when used in combination with a specially designed high-accuracy pass-through sensor:
Voltage: DC
Current and active power: DC and 45 to 66 Hz frequency range
Power factor effect (active power with a low power factor): 45 to 66 Hz frequency range
In other frequency ranges, the 3390-10 delivers the same level of accuracy as the 3390 used with the CT6862, CT6863, or 9709.
High accuracy is guaranteed when used in combination with the CT6862-10, CT6863-10, and 9709-10. High accuracy is only guaranteed when these sensors are used in combination with the 3390-10.