Schneider LV433930 Compact Nsx — now discontinued, supplied from remaining surplus and broker stock.
| Parameter | Value |
|---|---|
| Network type | AC |
| Protection type | L : 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 |
| Range of product | ComPact NSX400...630 |
| Product or component type | Trip unit |
| Long-time protection delay adjustment type tr | Fixed |
| Short-time protection delay adjustment type tsd | Fixed |
| Short-time protection pick-up adjustment type isd | Adjustable |
| Instantaneous protection pick-up adjustment type ii | Fixed |
| Earth-leakage protection sensitity adjustment type iδn | Adjustable |
| Earth-leakage protection time delay adjustement type δt | Adjustable |
| Long-time pick-up adjustment type ir (thermal protection) | Adjustable 9 settings |
| [Ue] rated operational voltage | 440 V AC 50/60 Hz |
| Parameter | Value |
|---|---|
| Trip unit rated current | 400 A at 40 °C |
| Network frequency | 50/60 Hz |
| Poles | 3P |
| Protected poles description | 3t |
| IP degree of protection | IP40 conforming to IEC 60529 |
| Pollution degree | 3 conforming to IEC 60947-1 |
| Electrical shock protection class | Class II |
| Standards | IEC 60947-2 EN 60947-2 UL 508 NEMA AB1 |
| Range | ComPact |
| Thermal memory | 20 minutes before and after tripping |
| Trip unit name | MicroLogic 4.3 |
| 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 |
| Neutral position | Left |
| Device application | Distribution |
| Trip unit technology | Electronic |
| Earth-leakage protection | Integrated |
| Earth-leakage protection class | Class A |
| Trip unit protection functions | LSoIR |
| Zone selective interlocking ZSI | Without |
| Ambient air temperature for storage | -40...85 °C |
| Ambient air temperature for operation | -25...70 °C |
| Earth-leakage protection specific mode | OFF using the IΔn rotary switch |
| [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 |
| [Ir] long-time protection pick-up adjustment range | 160...400 A |
| [tsd] short-time protection delay adjustment range | 0.02 s |
| [Isd] short-time protection pick-up adjustment range | 1.5...10 x Ir |
| [Ii] instantaneous protection pick-up adjustment range | 4800 A |
| [δt] earth-leakage protection time delay adjustment range | 500 ms 60 ms 1 s 150 ms 0 ms |
| [IΔn] earth-leakage protection sensitivity adjustment range | 3 A 1 A 300 mA 500 mA 5 A 10 A |
The LV433930 is a Schneider MicroLogic 4.3 electronic trip unit for the ComPact NSX400 and NSX630 molded-case circuit breaker frames, rated 400 A continuous on a 3-pole distribution network at 440 V AC, 60 Hz. It provides LSoIR protection — long-time overload, short-time with fixed delay, instantaneous short-circuit, and integrated earth-leakage — with an adjustable long-time pickup range of 160 to 400 A.
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