DatasheetTA/CT
Summing ring current transformer for differential protection with measuring CT transformer
| Type | Summing ring current transformer for differential protection with measuring CT transformer |
|---|---|
| Version | TA/CT 100…400 A and TA/CT 500…5000 A |
| Application | For summing currents via measuring current transformers when a direct ring current transformer cannot be used due to insulation or conductor dimensions |
| Max. hole diameter of direct ring current transformer | 300 mm |
| Compatible measuring CTs | Current transformers with 5 A secondary winding and the same primary current |
| Accuracy class of measuring CTs | Class 0.5 or 1 |
| Transformer ratio | According to the connected measuring current transformer ratio |
| Intervention current IΔn TA/CT 100…400 A | 30 mA…30 A |
| Intervention current IΔn TA/CT 500…5000 A | 300 mA…300 A |
| Connection to earth leakage relay | Preferably with shielded cable, especially for high sensitivity and current values less than or equal to 0.1 A |
| Insulation voltage rating | 0.72 kV |
| AC voltage test | 3 kV R.M.S., 50 Hz / 1 min |
| Considered circuits | Measuring windings towards earth |
| Reference temperature | 20 °C ± 5 °C |
| Nominal temperature range | -5…40 °C according to EN/IEC 60947-2 |
| Limit temperature range | -10…55 °C |
| Storage temperature range | -40…70 °C |
| Climatic suitability | Suitable for tropical climates |
| Connection | Screw terminals |
| Housing material | Self-extinguishing ABS |
| Mounting | Screw type |
| Weight | 400 g |
