All the cases are made of polycarbonated materials, not ABS material case,so the temperature endurence is much higher;

Detailed Product Description1. Polycarbonated case, 2. Imported silocon core, 3. Cross checked parameters, 4. CE/Type Tested. EP Series split core current transformer.1. All the cases are made of polycarbonated materials, not ABS material case,    so the temperature endurence is much higher;2. All the cores are made of imported highest quality silicon iron sheet,    so the core's magnetic performance is much higher;3. All the parameters are double cross-checked, so the testing results is much ensured! Specifications:Standard adopted: IEC44-1, BS7626;Primary current: 5~3000A;Secondary current:  0.333V or 0~100mA;Accuracy class: 1.0;Maxi-voltage: 0.72kV/3KV;Frenquency: 50/60Hz;Short time thermal current: Ith=100xIn;Security coefficient: FS<5 Model: Model Rated Input/Output (0.333V or 0~100mA) EP191 5A~150A EP318 30A~600A EP508 100A~1500A EP688 400A~3000A