SC1 Current Transformers are equivalent of DBP23 CT's
Camax can supply ex-stock SC1 Split-core series with Current ratio's from 100-400A Primary input
The aperture for the SC1's are 20 x 30mm (Equivalent to DBP23 Current Transformers).
SC1 models:
Crompton Instruments SC1 Split-core Current Transformers series with 20 x 30mm aperture (100-400/5A)