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Earth-fault unit for NB1
3P

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The differentials of the NB1 crcuit breaker provide people with protection against insulation defects.
The differential modules are supplied for mounting on NB1 circuit breakers.
They come in 2, 3 or 4 poles models in AC types, in 30 mA and 300 mA.
See this product in our catalogue
Number of poles : 2P-3P-4P.
Number of modules : 1.5 - 3 - 3.
Differential characteristics : AC.
Differential sensitivity Ian (mA) : 30 et 300.
Nominal voltage Ue ( Vac): 230 / 400.
Max. operating voltage Umax (Vac) : 440.
Insulation voltage Ui (Vac) : 500.
Nominal frequency HZ : 50-60.
Breaking capacity Icn KA.
As NB1 63 associated : 6 - 10.
Max. number of manoeuvres: 10 000.
Protection level : IP20.
Limitation class: 3.
Power supply sup/inf.: yes .
Accessories: yes .
Section cable maxi. : 25 / 35 mm².
Dimensions HxLxP : 2P = 91.5x27x11 - 3P = 91.5x54x77 - 4P = 91.5x54x77.
CEI EN 60898.
GB 10963 - 90.
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