Products
Low Voltage Instrument Transformers
TWB SA manufactures all types of low voltage instrument transformers, current and voltage, 0.75kV and 1 kV, for indoor as well as for outdoor applications, according to IEC 61869-1. They are window, wound or split core type. They are either encapsulated by a high grade flame self-extinguishing polycarbonate housing or resin impregnated.
Apart from these types, we are able to manufacture any other special types upon request.
| Parameter | Value |
|---|---|
| Rated insulation level | 0.72 kV and 1 kV |
| Frequency | 50 / 60 Hz |
| Rated primary current | up to 2500 A |
| Rated secondary current | 1 A or 5 A |
| Accuracy class | 0.1 up to 3 for measuring and 5P or 10P for protection |
| Rated thermal current | Ith = 60 × IN |
| Dynamic current | Idyn = 2.5 × Ith |