These transformers are generally used to provide voltage output signal.  All models have an Insulation level of 600V, 10 kv BIL Full Wave, 50 - 400Hz and are UL Recognized.  The data sheets below show a 1 Volt output, other secondary voltage outputs are available.
Model CV2 (Window 1.13" Diameter)
Ratio 50:1V to 400:1V
Model CV7 (Window 2.50" Diameter)
Ratio 50:1V to 1600:1V
Model CV8 (Window 3.25" Diameter)
Ratio 100:1V to 1000:1V 
Model CV19 (Window 4.25" Diameter)
Ratio 50:1V to 4000:1V
Model CV125 (Window 6.31" Diameter)
Ratio 50:1V to 4000:1V
Model CV126 (Window 8.25" Diameter)
Ratio 50:1V to 4000:1V