The TE series of solid-core CTs by Socomec are revenue grade current transformers for use with the Digiware Monitoring System. They can be used to monitor from 5 to 1000A and come in 5 sizes:
TE-18: 8.6mm opening, from 5A – 63A
TE-25: 13.5mm opening, from 40A – 160A
TE-35: 21mm opening, from 63A – 250A
TE-45: 31mm opening, from 160A – 630A
TE-55: 41mm opening, from 400A – 1000A
The TE series is designed so that the CTs can be interconnected to make a linear assembly when used with the coupling link.