For indoor application ,when the Rated voltage is below 660V, AC frequency is 50Hz,meansure energy,current and protect relay  

Specification

1.Rated Voltage: 660V

2. Rated Frequency : 60HZ

3. Rated Primary Current : 5-1500A

4. Rated Secondary Current : 5A

:

Rated Primary Current      (A)	Rated Burden (VA)
	0.5S	0.2	0.2S	0.5
5-600	5	5	5	10
750-1500	10	10	10	10

LQG-0.66 series current transformer