Trip unit MicroLogic 4.3 for ComPact NSX 400/630 circuit breakers, electronic, rating 400A, 4 poles 4d

Complementary
Long-time pick-up adjustment type Ir (thermal protection) Adjustable 9 settings
[Ir] long-time protection pick-up adjustment range 160…400 A
Long-time protection delay adjustment type tr Fixed
[tr] long-time protection delay adjustment range 11 s at 7.2 x Ir, 16 s at 6 x Ir, 400 s at 1.5 x Ir
Thermal memory 20 minutes before and after tripping
Short-time protection pick-up adjustment type Isd Adjustable
[Isd] Short-time protection pick-up adjustment range 1.5…10 x Ir
Short-time protection delay adjustment type tsd Fixed
[tsd] Short-time protection delay adjustment range 0.02 s
Instantaneous protection pick-up adjustment type Ii Fixed
[Ii] instantaneous protection pick-up adjustment range 4800 A
Earth-leakage protection Integrated
Earth-leakage protection class Class A
Earth-leakage protection sensitity adjustment type IΔn Adjustable
[IΔn] earth-leakage protection sensitivity adjustment range 1 A, 500 mA, , 3 A, 300 mA, 10 A, 5 A,
Earth-leakage protection specific mode
OFF using the IΔn rotary switch
Earth-leakage protection time delay adjustement type Δt Adjustable
[Δt] Earth-leakage protection time delay adjustment range 0 ms, 150 ms, 60 ms, 500 ms, 1 s
Neutral protection settings 0.5 x Ir (3t + N/2), 1 x Ir (4t), No protection (3t)
Zone selective interlocking ZSI Without
Local signalling Flashing LED (green) for ready to operate, LED 105 % Ir (red) for overload, LED 90 % Ir (orange) for overload, Color indicator (yellow) for residual current