What is the difference in earth fault current internal measurement between 56517 and 56173 products?
Product 56517 (Earth-leakage relay RH197M - 0.03..30 A - 0..4.5 s - 240 V) has -7 … 7 % the accuracy of measurement between leakage current to earth detected by sensor and the current measured by the product.
Product 56173 (Earth-leakage relay RH99M with manual reset - 0.03..30 A - 0..4.5 s - 240 V) has 80..100% the detection range of a faulty current
For a particular Idn, the product will detect a fault if the current is between 80 and 100% of Idn