SC4 Current Transformers are equivalent of DBP812 CT's
Camax can supply ex-stock SC4 Split-core series with Current ratio's from 500-1600A Primary outputs.
The aperture for the SC4's are 80 x 120mm (Equivalent to DBP812 Current Transformers).
SC4 models:
Crompton Instruments SC4 Split-core Current Transformers series with 80 x 120mm aperture (500-1600/5A)