Sourcing 800A CT's

[overeasy]

The ECSL55800 and ECS80-800 (55mm and 80mm) are Echun CTs. See this post:

Additional CT clamps

You can try E-chun. They were my supplier until the USA slapped the 25% China tariff. I believe that’s what Smart Guys were selling. Their models are: 50A - ECS1050-L59E 50A/50mA with TVS diodes, 3.5mm jack 100A - ECS16100-L59H 100A/50mA with TVS diodes, 3.5mm jack