The CT SCT-1250-400 is a 400A spit core CT with inner dimensions of 31mm.
 
Current Sensor Features ·Rated input from 70 Amp to 800 Amp ·Output 0.333 Volt AC at rated current ·Operates from 50 Hz to 400 Hz ·Phase angle < 2 degrees measured at 50% rated current ·Linearity accuracy ± 1% ·8 ft. twisted-pair lead ·UL recognized ·Accuracy at 10% to 130% of rated current ·Custom output and other parameters are available Description The Magnelab SCT-1250 series is a popular and frequently used split core current sensing transformer. Designed to transform up to 800 amperes of AC input current into a 0.333 volt output, this AC current sensor is ideal in existing electrical wiring installations. In addition, it may simply and safely be snapped around a conductor that is already installed. At the same time, the SCT-1250 series comes with a self locking mechanism for added safety. It is most commonly used in recording, data logging, energy management, power monitoring and cost allocation.