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Schneider Electric LV433951

Schneider LV433951 MicroLogic 7.3 E trip unit, 570 A, 3-pole

MPNLV433951
Obsolete

Schneider LV433951 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.

$2,537.86Ref. price · indicative, final on quote
Schneider Electric LV433951 datasheet (PDF)
Source DocumentedChannel stated on listing & quote
Condition PhotosReal unit photos / video on request
WhatsApp AnswersFast human replies for machine-down parts
Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & sourcing agent· Listing updated Sep 2026

Specifications

LV433951 key specifications
ParameterValue
Display typeLCD display
Network typeAC
Protection typeL : for overload protection (long time) S : for short time short-circuit protection I : for instantaneous short-circuit protection R : for earth-leakage protection
Range of productComPact NSX400...630
Type of measurementEnergy meter
Product or component typeTrip unit
Long-time protection delay adjustment type trAdjustable
Short-time protection delay adjustment type tsdAdjustable
Short-time protection pick-up adjustment type isdAdjustable
Instantaneous protection pick-up adjustment type iiAdjustable
Earth-leakage protection sensitity adjustment type iδnAdjustable
Earth-leakage protection time delay adjustement type δtAdjustable

All specifications

LV433951 additional specifications
ParameterValue
Long-time pick-up adjustment type ir (thermal protection)Adjustable 9 settings
[Ue] rated operational voltage440 V AC 50/60 Hz
Trip unit rated current570 A at 40 °C
Network frequency50/60 Hz
Poles3P
Protected poles description3t
IP degree of protectionIP40 conforming to IEC 60529
Communication of dataPower quality Earth leakage current Protection and alarm settings Maintenance indicators Maximeters/minimeters Energy metering Demand current and power Instantaneous and demand values Test reports Time-stamped histories and event tables
Pollution degree3 conforming to IEC 60947-1
StandardsEN 60947-2 UL 508 NEMA AB1 IEC 60947-2
RangeComPact
Thermal memory20 minutes before and after tripping
Trip unit nameMicroLogic 7.3 E
Local signallingFlashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload
Neutral positionLeft
Device applicationDistribution
Trip unit technologyElectronic
Earth-leakage protectionIntegrated
Earth-leakage protection classClass A
Trip unit protection functionsLSIR
Zone selective interlocking ZSIWithout
Ambient air temperature for storage-40...85 °C
Ambient air temperature for operation-25...70 °C
Earth-leakage protection specific modeOFF using the IΔn rotary switch
[Tr] Long-Time protection delay adjustment range15...400 s at 1.5 x Ir 0.35...11 s at 7.2 x Ir 0.5...16 s at 6 x Ir
[Ir] long-time protection pick-up adjustment range250...570 A
[tsd] short-time protection delay adjustment range0...0.4 s
[Isd] short-time protection pick-up adjustment range1.5...10 x Ir
[Ii] instantaneous protection pick-up adjustment range1.5...12 x In Compact NSX400 6900 A Compact NSX630
[δt] earth-leakage protection time delay adjustment range0 ms 150 ms 500 ms 60 ms 1 s
[IΔn] earth-leakage protection sensitivity adjustment range500 mA 300 mA 5 A 10 A 3 A 1 A

Product details

Overview

The LV433951 is a MicroLogic 7.3 E electronic trip unit for the Schneider ComPact NSX630 breaker range, rated 570 A and built for 3-pole distribution duty. It integrates LSIR protection — long-time, short-time, instantaneous, and earth-leakage — with an LCD display for metering and event logs.

The 570 A rating matches the breaker frame; the long-time pickup (Ir) adjusts from 250 to 570 A, letting you tune overload protection to the connected load without swapping the trip unit. Short-time delay (Tsd) is adjustable 0–0.4 s, giving coordination headroom downstream.

MPN
LV433951