Schneider LV431491 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.
| Parameter | Value |
|---|---|
| Display type | LCD display |
| Network type | AC |
| Protection type | L : for overload protection (long time) S : for short time short-circuit protection I : for instantaneous short-circuit protection |
| Range of product | ComPact NSX100...250 |
| Type of measurement | Energy meter |
| Product or component type | Trip unit |
| Long-time protection delay adjustment type tr | Adjustable |
| Short-time protection delay adjustment type tsd | Adjustable |
| Short-time protection pick-up adjustment type isd | Adjustable 9 settings |
| Instantaneous protection pick-up adjustment type ii | Adjustable |
| Long-time pick-up adjustment type ir (thermal protection) | Adjustable 9 settings |
| [Ue] rated operational voltage | 690 V AC 50/60 Hz |
| Parameter | Value |
|---|---|
| Trip unit rated current | 250 A 104 °F (40 °C) |
| Network frequency | 50/60 Hz |
| Poles | 3P |
| Protected poles description | 3t |
| Communication of data | Instantaneous and demand values Maintenance indicators Power quality Energy metering Maximeters/minimeters Demand current and power Protection and alarm settings Time-stamped histories and event tables |
| Standards | EN/IEC 60947-2 UL 508 |
| Range | ComPact |
| Category | US10DE201101 |
| Thermal memory | 20 minutes before and after tripping |
| Trip unit name | MicroLogic 5.2 E |
| Local signalling | Flashing LED (green) for ready to operate LED 105 % Ir (red) for overload LED 90 % Ir (orange) for overload |
| Device application | Distribution |
| Trip unit technology | Electronic |
| Earth-leakage protection | Without |
| Electrical data recording | Maintenance indicators |
| Trip unit protection functions | LSI |
| Zone selective interlocking ZSI | With |
| Ambient air temperature for storage | -40...185 °F (-40...85 °C) |
| Ambient air temperature for operation | -13...158 °F (-25...70 °C) |
| [Tr] Long-Time protection delay adjustment range | 15...400 s 1.5 x Ir 0.35...11 s 7.2 x Ir 0.5...16 s 6 x Ir |
| [Ir] long-time protection pick-up adjustment range | 100...250 A |
| [tsd] short-time protection delay adjustment range | 0...0.4 s I²t=off 0.1...0.4 s I²t=on |
| [Isd] short-time protection pick-up adjustment range | 1.5...10 x Ir |
| [Ii] instantaneous protection pick-up adjustment range | 1.5...12 x In |
The LV431491 is a MicroLogic 5.2 E electronic trip unit for the Schneider ComPact NSX250 molded-case breaker, rated 250 A with 3 poles and LSI protection (long-time, short-time, instantaneous).
The long-time pickup Ir adjusts from 100 to 250 A in 1 A steps, letting you match the trip unit to the actual load without changing the breaker frame. Short-time delay Tsd is adjustable 0 to 0.4 s with I²t on or off, giving selectivity headroom downstream.
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