Medium-voltage instrument transformers
Low voltage current instrument transformer
CLH 60
The CLH 60 current instrument transformer is intended for measurement and protective purposes in indoor LV switching stations with the highest system voltage of 0.72 kV. The rated secondary current is either 5A or 1A. The transformers meet the requirements on the required accuracy class within 25% to 100% of rated burden range.
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Parameters
- Highest voltage for equipment: 0.72 kV
- Power frequency test voltage: 3 kV
- Nominal primary current: 75 - 1500 A
- Nominal secondary current: 5 A or 1 A
- Rated short-time thermal current, Ith: 60 x In (max. 50 kA)
- Rated dynamic current, Idyn: 2,5 x Ith
- Nominal frequency: 50 Hz
- Thermal insulation class: E
- Operation conditions: corresponds to the -5/40 thermal class to ČSN EN 61869-1 standard; for mounting in indoor areas without water condensation
- Standard: ČSN EN 61869-1, ČSN EN 61869-2, IEC EN 61869
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