Schneider LV433817


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Schneider Electric trip unit MicroLogic 4.2 AB for ComPact NSX 250 circuit breakers, electronic, rating 240 A, 4 poles 4d

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Range of productComPact NSX100…250
Product or component typeTrip unit
Trip unit nameMicroLogic 4.2 AB
Trip unit technologyElectronic
Range compatibilityComPact NSX250
Device applicationSpecial application
Number of poles4P
Protected poles description4t
3t + N/2
Neutral positionLeft
Trip unit protection functionsLSoIR
Protection typeL : for overload protection (long time)
So : for short time short-circuit protection with fixed delay
I : for instantaneous short-circuit protection
R : for earth-leakage protection
Trip unit rated current240 A at 40 °C
[Ue] rated operational voltage440 V AC 50/60 Hz
Network typeAC
Network frequency50/60 Hz
Long-time pick-up adjustment type Ir (thermal protection)Adjustable 9 settings
[Ir] long-time protection pick-up adjustment range140…240 A
Long-time protection delay adjustment type trFixed
[tr] long-time protection delay adjustment range0.35 s at 7.2 x Ir
0.5 s at 6 x Ir
15 s at 1.5 x Ir
Thermal memory20 minutes before and after tripping
Short-time protection pick-up adjustment type IsdAdjustable
[Isd] Short-time protection pick-up adjustment range1.5…10 x Ir
Short-time protection delay adjustment type tsdFixed
[tsd] Short-time protection delay adjustment range0.02 s
Instantaneous protection pick-up adjustment type IiFixed
[Ii] instantaneous protection pick-up adjustment range2880 A
Earth-leakage protectionIntegrated
Earth-leakage protection classClass A
Earth-leakage protection sensitity adjustment type IΔnAdjustable
[IΔn] earth-leakage protection sensitivity adjustment range3 A
1 A
300 mA
30 mA
5 A
100 mA
500 mA
Earth-leakage protection specific modeOFF using the IΔn rotary switch
Earth-leakage protection time delay adjustement type ΔtAdjustable
[Δt] Earth-leakage protection time delay adjustment range0 ms
500 ms
60 ms
1 s
150 ms
Neutral protection settings0.5 x Ir (3t + N/2)
1 x Ir (4t)
No protection (3t)
Zone selective interlocking ZSIWithout
Local signallingFlashing LED (green) for ready to operate
LED 105 % Ir (red) for overload
LED 90 % Ir (orange) for overload
Color indicator (yellow) for residual current
StandardsNEMA AB1
UL 508
EN 60947-2
IEC 60947-2
Product certificationsEAC
Pollution degree3 conforming to IEC 60947-1
IP degree of protectionIP40 conforming to IEC 60529
Ambient air temperature for operation-25…70 °C
Ambient air temperature for storage-40…85 °C
Packing Units
Unit Type of Package 1PCE
Number of Units in Package 11
Package 1 Height9.8 cm
Package 1 Width11.1 cm
Package 1 Length15.0 cm
Package 1 Weight792.0 g
Unit Type of Package 2S03
Number of Units in Package 210
Package 2 Height30.0 cm
Package 2 Width30.0 cm
Package 2 Length40.0 cm
Package 2 Weight8.642 kg
Contractual warranty
Warranty18 months

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