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Schneider Electric LV433952

Schneider LV433952 MicroLogic 7.3 E trip unit, 400 A, 4-pole

MPNLV433952
Obsolete

Schneider LV433952 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.

$2,667.52Ref. price · indicative, final on quote
Schneider Electric LV433952 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

LV433952 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

LV433952 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 current400 A at 40 °C
Network frequency50/60 Hz
Poles4P
Protected poles description3t 4t 3t + N/2 3t + OSN
IP degree of protectionIP40 conforming to IEC 60529
Communication of dataMaximeters/minimeters Maintenance indicators Time-stamped histories and event tables Earth leakage current Energy metering Protection and alarm settings Test reports Instantaneous and demand values Demand current and power Power quality
Pollution degree3 conforming to IEC 60947-1
StandardsIEC 60947-2 UL 508 EN 60947-2 NEMA AB1
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
Neutral protection settings0.5 x Ir (3t + N/2) 1 x Ir (4t) 1.6 x Ir (3t + OSN) No protection (3t)
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 range160...400 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 range4800 A Compact NSX630 1.5...12 x In Compact NSX400
[δt] earth-leakage protection time delay adjustment range60 ms 150 ms 500 ms 1 s 0 ms
[IΔn] earth-leakage protection sensitivity adjustment range1 A 500 mA 3 A 300 mA 10 A 5 A

Product details

Overview

The LV433952 is a Schneider MicroLogic 7.3 E electronic trip unit for the ComPact NSX400 and NSX630 molded-case circuit breaker frames, rated 400 A and configured for 4-pole distribution applications. It provides LSIR protection — long-time, short-time, instantaneous, and earth-leakage — with adjustable long-time pickup (Ir) from 160 to 400 A and adjustable short-time delay (Tsd) from 0 to 0.4 s.

The 400 A rating and 4-pole configuration suit it for main or feeder protection in 3-phase + neutral distribution panels. The adjustable Ir range (160–400 A) lets you match the trip to the actual load without swapping the unit. Long-time delay Tr is adjustable from 15 to 400 s at 1.5 x Ir, giving flexibility for motor-start or transformer-inrush coordination.

Against the LV434551 (160 A, fixed Tr), the LV433952 offers adjustable long-time delay and a 400 A rating, making it the better fit for applications needing coordination tuning.

MPN
LV433952