These 100A CT sensors are probably the best on the market today. Accuracy is +/- 0.5%. At 220V it can measure up to 22,000 Watt. Great to measure the main circuit(s) PLN connection. The 100A sensor will also be sufficiently large enough for most large distribution circuits. Please measure the width of the cable. The 100A sensor will fit cables with maximum width of 16mm. Most distribution cables will be less than 16mm.
The next size up CT Sensor we carry will be 200A with a 24m opening. These CT sensors are for large installations.