Product range	Circuit-breaker
Protective function	System and cable protection
Standard/Approval	IEC
Installation type	Fixed
Release system	Electronic release
Construction size	NZM4
Description	R.m.s. value measurement and “thermal memory” NZM...S1 terminal type: NZM...XKSA cover required
Number of poles	3 pole
Standard equipment	Screw connection
Rated current = rated uninterrupted current [In = Iu]	1600 A
1000 V 50/60 Hz [Icu]	20 kA
Overload trip [Ir ] 800 - 1600 A Short-circuit releases [Irm ] >Non-delayed [Ii = In x …]	800 - 1600 A
Rated surge voltage invariability [Uimp ] >Main contacts	2 - 12
Rated surge voltage invariability [Uimp ] >Auxiliary contacts	8000 V
Rated operational voltage [Ue]	6000 V
Rated current = rated uninterrupted current [In = Iu]	1000 V AC
Overvoltage category/pollution degree	1600 A
Rated insulation voltage [Ui ]	III/3
Utilization category	1000 V
Ambient temperature >Ambient temperature, storage	A
Ambient temperature >Operation	- 40 - + 70 °C
240 V 50/60 Hz [Icm ]	-25 - +70 °C
400/415 V 50/60 Hz [Icm ]	275 kA
440 V 50/60 Hz [Icm ]	187 kA
525 V 50/60 Hz [Icm ]	187 kA
690 V 50/60 H [Ic]	143 kA
1000 V 50/60 Hz [Icm]	100 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >240 V 50/60 Hz [Icu ]	40 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >400/415 V 50 Hz [Icu ]	125 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >440 V 50/60 Hz [Icu ]	85 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >525 V 50/60 Hz [Icu ]	85 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >690 V 50/60 Hz [Icu ]	65 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >1000 V 50/60 Hz [Icu]	50 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >230 V 50/60 Hz [Ics ]	20 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >400/415 V 50/60 Hz [Ics ]	63 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >440 V 50/60 Hz [Ics ]	50 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >525 V 50/60 Hz [Ics ]	50 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >690 V 50/60 Hz [Ics]	50 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >1000 V AC [Ics]	37 kA
t = 0.3 s [Icw ]	15 kA
t = 1 s [Icw ]	19.2 kA
Lifespan, mechanical [Operations]	19.2 kA
Max. operating frequency	10000
1000 V 50/60 Hz [Operations]	60 Ops/h
Standard equipment	Lifespan, mechanical: of which max. 50 % trip by shunt/undervoltage release
Round copper conductor >Tunnel terminal >Stranded >4-hole	500
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Single hole [min.]	Screw connection
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Single hole [max.]	4 x (50 - 240) mm2
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Double hole [min.]	1 x (185 - 240) mm2
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Double hole [max.]	2 x (70 - 185) mm2
Round copper conductor >Bolt terminal and rear-side connection >Connection width extension >Connection width extension	4 x 50 mm2
Al conductors, Cu cable >Tunnel terminal >Stranded >4-hole	4 x (35 - 185) mm2
Cu strip (number of segments x width x segment thickness) >Flat conductor terminal [min.]	2 x 240 6 x (70 - 240) mm2
Cu strip (number of segments x width x segment thickness) >Flat conductor terminal [max.]	4 x (50 - 240) mm2
Cu strip (number of segments x width x segment thickness) >Module plate >Single hole	6 x 16 x 0.8 mm
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Flat copper strip, with holes [min.]	(2 x) 10 x 32 x 1.0 mm
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Flat copper strip, with holes [max.]	(2 x) 10 x 50 x 1.0 mm
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Connection width extension	(2 x) 10 x 50 x 1.0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Screw connection	(2 x) 10 x 50 x 1.0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [min.]	(2 x) 10 x 80 x 1.0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [max.]	M10
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Module plate >Single hole [min.]	25 x 5 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Module plate >Single hole [max.]	2 x (50 x 10) 2 x (80 x 10) mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Module plate >Double hole	25 x 5 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Connection width extension >Connection width extension [min.]	2 x (50 x 10) mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Connection width extension >Connection width extension [max.]	2 x (50 x 10) mm
Control cables	60 x 10 mm
Rated operational current for specified heat dissipation [In]	2 x (80 x 10) mm
Equipment heat dissipation, current-dependent [Pvid]	1 x (0.75 - 2.5) 2 x (0.75 - 1.5) mm2
Operating ambient temperature min.	1600 A
Operating ambient temperature max.	284 W
10.2 Strength of materials and parts >10.2.2 Corrosion resistance	-25 °C
10.2 Strength of materials and parts >10.2.3.1 Verification of thermal stability of enclosures	+70 °C
10.2 Strength of materials and parts >10.2.3.2 Verification of resistance of insulating materials to normal heat	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.3.3 Verification of resistance of insulating materials to abnormal heat and fire due to internal electric effects	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.4 Resistance to ultra-violet (UV) radiation	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.5 Lifting	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.6 Mechanical impact	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.7 Inscriptions	Does not apply, since the entire switchgear needs to be evaluated.
10.3 Degree of protection of ASSEMBLIES	Does not apply, since the entire switchgear needs to be evaluated.
10.4 Clearances and creepage distances	Meets the product standard´s requirements.
10.5 Protection against electric shock	Does not apply, since the entire switchgear needs to be evaluated.
10.6 Incorporation of switching devices and components	Meets the product standard´s requirements.
10.7 Internal electrical circuits and connections	Does not apply, since the entire switchgear needs to be evaluated.
10.8 Connections for external conductors	Does not apply, since the entire switchgear needs to be evaluated.
10.9 Insulation properties >10.9.2 Power-frequency electric strength	Is the panel builder´s responsibility.
10.9 Insulation properties >10.9.3 Impulse withstand voltage	Is the panel builder´s responsibility.
10.9 Insulation properties >10.9.4 Testing of enclosures made of insulating material	Is the panel builder´s responsibility.
10.10 Temperature rise	Is the panel builder´s responsibility.
10.11 Short-circuit rating	Is the panel builder´s responsibility.
10.12 Electromagnetic compatibility	The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
10.13 Mechanical function	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
Rated permanent current Iu	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
Rated voltage	The device meets the requirements, provided the information in the instruction leaflet (IL) is observed.
Rated short-circuit breaking capacity lcu at 400 V, 50 Hz	1600 A
Overload release current setting	1000 - 1000 V
Adjustment range short-term delayed short-circuit release	85 kA
Adjustment range undelayed short-circuit release	800 - 1600 A
Integrated earth fault protection	0 - 0 A
Type of electrical connection of main circuit	3200 - 19200 A
Device construction	No
Suitable for DIN rail (top hat rail) mounting	Screw connection
DIN rail (top hat rail) mounting optional	Built-in device fixed built-in technique
Number of auxiliary contacts as normally closed contact	No
Number of auxiliary contacts as normally open contact	No
Number of auxiliary contacts as change-over contact	0
With switched-off indicator	0
With under voltage release	0
Number of poles	No
Position of connection for main current circuit	No
Type of control element	3
Complete device with protection unit	Front side
Motor drive integrated	Rocker lever
Motor drive optional	Yes
Degree of protection (IP)	No
Characteristic curve	Yes

As Mnelko, we are a reliable partner in industrial automation solutions, offering high-quality and innovative products with a wide product range to meet all the needs of your business. Our product portfolio consists of solutions designed based on the principles of high performance, durability, and efficiency to support modern industrial processes.
All of our products ensure maximum reliability even in challenging working conditions and help your business operations run smoothly. The products we offer in industrial automation, energy management, cabling solutions, and many other areas adapt flexibly to the needs of different sectors.
Additionally, our products are manufactured using only high-quality materials and comply with international standards. Through the solutions we provide, we enable our customers to increase operational efficiency and optimize costs. Our company closely follows technological advancements and continuously offers innovative products to help our customers gain a competitive advantage.
On each of our product pages, you can find comprehensive information about technical details, areas of use, and product features. You can explore all the products you need to strengthen your industrial processes on our website and enjoy a seamless purchasing experience.