Product range	Circuit-breaker
Protective function	Motor protection
Standard/Approval
Installation type	IEC
Release system	Fixed
Construction size	Electronic release
Description	NZM4
Number of poles	Phase-failure sensitivity IEC/EN 60947-4-1, IEC/EN 60947-2 R.m.s. value measurement and “thermal memory” adjustable time delay setting to overcome current peaks tr: 2 – 20 s at 6 x Ir also infinity (without overload releases) NZM...S1 terminal type: NZM...XKSA cover required NZM4...S1 terminal type: Insulated busbar connection (NZM4-XKS screw connection)
Standard equipment	3 pole
Rated current = rated uninterrupted current [In = Iu]	Screw connection
1000 V 50/60 Hz [Icu]	875 A
Overload trip [Ir ] 438 - 875 A Short-circuit releases [Irm ] >Non-delayed [Ii = Ir x …]	20 kA
Rated surge voltage invariability [Uimp ] >Main contacts	438 - 875 A
Rated surge voltage invariability [Uimp ] >Auxiliary contacts	2 - 14
Rated operational voltage [Ue]	8000 V
Rated current = rated uninterrupted current [In = Iu]	6000 V
Overvoltage category/pollution degree	1000 V AC
Rated insulation voltage [Ui ]	875 A
Utilization category	III/3
Ambient temperature >Ambient temperature, storage	1000 V
Ambient temperature >Operation	B
240 V 50/60 Hz [Icm ]	- 40 - + 70 °C
400/415 V 50/60 Hz [Icm ]	-25 - +70 °C
440 V 50/60 Hz [Icm ]	275 kA
525 V 50/60 Hz [Icm ]	187 kA
690 V 50/60 H [Ic]	187 kA
1000 V 50/60 Hz [Icm]	143 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >240 V 50/60 Hz [Icu ]	100 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >400/415 V 50 Hz [Icu ]	40 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >440 V 50/60 Hz [Icu ]	125 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 ]	85 kA
Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >1000 V 50/60 Hz [Icu]	65 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >230 V 50/60 Hz [Ics ]	50 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >400/415 V 50/60 Hz [Ics ]	20 kA
Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >440 V 50/60 Hz [Ics ]	63 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]	50 kA
t = 0.3 s [Icw ]	37 kA
t = 1 s [Icw ]	15 kA
Lifespan, mechanical [Operations]	19.2 kA
Max. operating frequency	19.2 kA
1000 V 50/60 Hz [Operations]	10000
Standard equipment	60 Ops/h
Round copper conductor >Tunnel terminal >Stranded >4-hole	Lifespan, mechanical: of which max. 50 % trip by shunt/undervoltage release
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Single hole [min.]	500
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Single hole [max.]	Screw connection
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Double hole [min.]	4 x (50 - 240) mm2
Round copper conductor >Bolt terminal and rear-side connection >Module plate >Double hole [max.]	1 x (185 - 240) mm2
Round copper conductor >Bolt terminal and rear-side connection >Connection width extension >Connection width extension	2 x (70 - 185) mm2
Al conductors, Cu cable >Tunnel terminal >Stranded >4-hole	4 x 50 mm2
Cu strip (number of segments x width x segment thickness) >Flat conductor terminal [min.]	4 x (35 - 185) mm2
Cu strip (number of segments x width x segment thickness) >Flat conductor terminal [max.]	2 x 240 6 x (70 - 240) mm2
Cu strip (number of segments x width x segment thickness) >Module plate >Single hole	4 x (50 - 240) mm2
Cu strip (number of segments x width x segment thickness) >Bolt terminal and rear-side connection >Flat copper strip, with holes [min.]	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 [max.]	(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 >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 50 x 1.0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [max.]	(2 x) 10 x 80 x 1.0 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Module plate >Single hole [min.]	M10
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Module plate >Single hole [max.]	25 x 5 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Module plate >Double hole	2 x (50 x 10) 2 x (80 x 10) mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Connection width extension >Connection width extension [min.]	25 x 5 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	2 x (50 x 10) mm
Rated operational current for specified heat dissipation [In]	60 x 10 mm
Equipment heat dissipation, current-dependent [Pvid]	2 x (80 x 10) mm
Operating ambient temperature min.	1 x (0.75 - 2.5) 2 x (0.75 - 1.5) mm2
Operating ambient temperature max.	875 A
10.2 Strength of materials and parts >10.2.2 Corrosion resistance	84.98 W
10.2 Strength of materials and parts >10.2.3.1 Verification of thermal stability of enclosures	-25 °C
10.2 Strength of materials and parts >10.2.3.2 Verification of resistance of insulating materials to normal heat	+70 °C
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	Meets the product standard´s requirements.
10.3 Degree of protection of ASSEMBLIES	Does not apply, since the entire switchgear needs to be evaluated.
10.4 Clearances and creepage distances	Does not apply, since the entire switchgear needs to be evaluated.
10.5 Protection against electric shock	Meets the product standard´s requirements.
10.6 Incorporation of switching devices and components	Does not apply, since the entire switchgear needs to be evaluated.
10.7 Internal electrical circuits and connections	Meets the product standard´s requirements.
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	Does not apply, since the entire switchgear needs to be evaluated.
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	Is the panel builder´s responsibility.
10.13 Mechanical function	The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
Overload release current setting	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
Adjustment range undelayed short-circuit release	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
With thermal protection	The device meets the requirements, provided the information in the instruction leaflet (IL) is observed.
Phase failure sensitive	438 - 875 A
Switch off technique	875 - 12250 A
Rated operating voltage	Yes
Rated permanent current Iu	Yes
Rated operation power at AC-3, 230 V	Electronic
Rated operation power at AC-3, 400 V	1000 - 1000 V
Type of electrical connection of main circuit	875 A
Type of control element	250 kW
Device construction	500 kW
With integrated auxiliary switch	Screw connection
With integrated under voltage release	Rocker lever
Number of poles	Built-in device fixed built-in technique
Rated short-circuit breaking capacity lcu at 400 V, AC	No
Degree of protection (IP)	No
Height	3
Width	150 kA
Depth	IP20
Characteristic curve	207 mm

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