Complementary
Long-time pick-up adjustment type Ir (thermal protection)	Adjustable 9 settings
[Ir] long-time protection pick-up adjustment range	160...400 A
Long-time protection delay adjustment type tr	Fixed
[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
Neutral protection settings	0.5 x Ir (3D + N/2); 1 x Ir (4D); No protection (3D)
Thermal memory	20 minutes before and after tripping
Short-time protection pick-up adjustment type Isd	Adjustable
[Isd] Short-time protection pick-up adjustment range	1.5...10 x Ir
Short-time protection delay adjustment type tsd	Fixed
Instantaneous protection pick-up adjustment type Ii	Fixed
[Ii] instantaneous protection pick-up adjustment range	4800 A
Earth-leakage protection	Integrated
Earth-leakage protection class	Class A
Earth-leakage protection sensitity adjustment type IΔn	Adjustable
[IΔn] earth-leakage protection sensitivity adjustment range	0.3 A; 0.5 A; 1 A; 3 A; 5 A; 10 A
Earth-leakage protection specific mode	OFF using the IΔn rotary switch
Earth-leakage protection time delay adjustement type Δt	Adjustable
[Δt] Earth-leakage protection time delay adjustment range	0 ms; 60 ms; 150 ms; 500 ms; 1 s
Zone selective interlocking ZSI	Without
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
Contractual warranty
Warranty (in months)	18
Environment
Standards	EN/IEC 60947-2
Electrical shock protection class	Class II
Pollution degree	3 conforming to IEC 60947-1
IP degree of protection	IP40 conforming to IEC 60529
Ambient air temperature for operation	-25…70 °C
Ambient air temperature for storage	-50…85 °C
Logistical informations
Country of origin	CN
Main
Range	ComPacT
Range of product	ComPacT NSX400...630
Product or component type	Trip unit
Trip unit name	MicroLogic 4.3 AL
Trip unit technology	Electronic
Range compatibility	ComPacT NSX630; ComPacT NSX400
Device application	Distribution
Poles description	4P
Protected poles description	3D + N/2; 4D; 3D
Neutral position	Left
Trip unit protection functions	LSoI
Protection type	L : for overload protection (long time); So : for short time short-circuit protection with fixed delay; I : for instantaneous short-circuit protection
Trip unit rating	400 A at 40 °C
[Ue] rated operational voltage	440 V AC 50/60 Hz
Network type	AC
Network frequency	50/60 Hz
Circuit breaker mounting mode	Fixed
Packing Units
Unit Type of Package 1	PCE
Number of Units in Package 1	1
Package 1 Height	17.0 cm
Package 1 Width	21.0 cm
Package 1 Length	25.0 cm
Package 1 Weight	2.378 kg
Unit Type of Package 2	S03
Number of Units in Package 2	2
Package 2 Height	30.0 cm
Package 2 Width	30.0 cm
Package 2 Length	40.0 cm
Package 2 Weight	5.152 kg

This MicroLogic 4.3 AL is a 4D electronic trip unit used on ComPacT NSX 400/630 circuit breakers. This 400A rated electronic trip unit is the best choice for all standard and special applications. It has customizable long term protection against overloads. It also offers customizable short term protection and fixed instantaneous short circuit protection. MicroLogic 4.3 AL offers a residual current alarm without tripping, available on the terminal block. MicroLogic 4.3 AL indicates overloads with alarm LEDs. The green Ready LED flashes when the circuit breaker is ready to trip. This product is part of our EcoStruxure Power architecture when combined with the PowerTag NSX and ComPacT NSX basic switch.