NZMN2-S250-CNA
102479 NZMN2-S250-CNA
102479

Circuit-breaker, 3p, 250A
Series NZM..-S..CNA circuit-breakers cover all application cases with just four compact sizes and are suitable for use in the worldwide market. Modular function groups always make mounting flexible. With magnetic short-circuit release in connection with overload relay. With short-circuit release lacking overload trip. Notes: Switches conform to UL/CSA as well as IEC regulations. The rating plate contains IEC switching performance values.

Product range	Circuit-breaker
Protective function	Short-circuit protection
Standard/Approval	UL/CSA, IEC
Installation type	Fixed
Release system	Thermomagnetic release
Description	Switches conform to UL/CSA as well as the IEC regulations. IEC switching performance values are contained on the rating plate. Motor protection in conjunction with contactor and overload relay With short-circuit release Without overload release Ir
Number of poles	3 pole
Standard equipment	Screw connection
Rated current = rated uninterrupted current [In = Iu]	250 A
Short-circuit releases [Irm ] >Non-delayed [Ii = In x …]	8 - 10
Standards	IEC/EN 60947
Protection against direct contact	Finger and back of hand proof to VDE 0106 Part 100
Climatic proofing	Damp heat, constant, to IEC 60068-2-78 Damp heat, cyclic, to IEC 60068-2-30
Ambient temperature >Ambient temperature, storage	- 40 - + 70 °C
Ambient temperature >Operation	-25 - +70 °C
Mechanical shock resistance (10 ms half-sinusoidal shock) according to IEC 60068-2-27	20 (half-sinusoidal shock 20 ms) g
Safe isolation to EN 61140 >Between auxiliary contacts and main contacts	500 V AC
Safe isolation to EN 61140 >between the auxiliary contacts	300 V AC
Weight	2.345 kg
Mounting position >Mounting position	Vertical and 90° in all directions   With XFI earth-fault release: - NZM1, N1, NZM2, N2: vertical and 90° in all directions with plug-in unit - NZM1, N1, NZM2, N2: vertical, 90° right/left with withdrawable unit: - NZM3, N3: vertical, 90° right/left - NZM4, N4: vertical with remote operator: - NZM2, N(S)2, NZM3, N(S)3, NZM4, N(S)4: vertical and 90° in all directions
Direction of incoming supply	as required
Degree of protection >Device	In the operating controls area: IP20 (basic degree of protection)
Degree of protection >Enclosures	With insulating surround: IP40 With door coupling rotary handle: IP66
Degree of protection >Terminations	Tunnel terminal: IP10 Phase isolator and strip terminal: IP00
Other technical data (sheet catalogue)	Weight Temperature dependency, Derating Effective power loss
Rated surge voltage invariability [Uimp ] >Main contacts	8000 V
Rated surge voltage invariability [Uimp ] >Auxiliary contacts	6000 V
Rated operational voltage [Ue]	690 V AC
Overvoltage category/pollution degree	III/3
Rated insulation voltage [Ui ]	1000 V
Use in unearthed supply systems	≦ 690 V
Rated short-circuit making capacity [Icm ] >240 V [Icm ]	187 kA
Rated short-circuit making capacity [Icm ] >400/415 V [Icm ]	105 kA
Rated short-circuit making capacity [Icm ] >440 V 50/60 Hz [Icm ]	74 kA
Rated short-circuit making capacity [Icm ] >525 V 50/60 Hz [Icm ]	53 kA
Rated short-circuit making capacity [Icm ] >690 V 50/60 H [Ic]	40 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >240 V 50/60 Hz [Icu ]	85 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >400/415 V 50/60 Hz [Icu ]	50 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >440 V 50/60 Hz [Icu ]	35 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >525 V 50/60 Hz [Icu ]	25 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >690 V 50/60 Hz [Icu ]	20 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >240 V 50/60 Hz [Ics ]	85 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >400/415 V 50/60 Hz [Ics ]	50 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >440 V 50/60 Hz [Ics ]	35 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >525 V 50/60 Hz [Ics ]	25 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >690 V 50/60 Hz [Ics]	5 kA
Rated short-circuit breaking capacity Icn [Icn ] >Maximum low-voltage h.b.c. fuse	355 A gG/gL
Rated short-circuit breaking capacity Icn [Icn ]	Maximum back-up fuse, if the expected short-circuit currents at the installation location exceed the switching capacity of the circuit-breaker.
Rated short-time withstand current >t = 0.3 s [Icw ]	1.9 kA
Rated short-time withstand current >t = 1 s [Icw ]	1.9 kA
Utilization category to IEC/EN 60947-2	A
Lifespan, mechanical(of which max. 50 % trip by shunt/undervoltage release) [Operations]	20000
Lifespan, electrical >AC-1 >400 V 50/60 Hz [Operations]	10000
Lifespan, electrical >AC-1 >690 V 50/60 Hz [Operations]	7500
Lifespan, electrical >AC--3 >400 V 50/60 Hz [Operations]	6500
Lifespan, electrical >AC--3 >415 V 50/60 Hz [Operations]	6500
Lifespan, electrical >AC--3 >690 V 50/60 Hz [Operations]	5000
Lifespan, electrical >Max. operating frequency	120 Ops/h
Total break time at short-circuit	< 10 ms
Standard equipment	Screw connection
Round copper conductor >Box terminal >Solid	1 x (12 … 6) mm2
Round copper conductor >Box terminal >Stranded	1 x (4 … 350) mm2
Round copper conductor >Tunnel terminal >Solid	1 x 6 mm2
Round copper conductor >Tunnel terminal >Stranded >Stranded	1 x (4 … 350) mm2
Round copper conductor >Bolt terminal and rear-side connection >Direct on the switch >Solid	1 x (11 … 6) mm2
Round copper conductor >Bolt terminal and rear-side connection >Direct on the switch >Stranded	1 x (4 … 3/0) mm2
Al conductors, Cu cable >Tunnel terminal >Solid	1 x 16 mm2
Al conductors, Cu cable >Bolt terminal and rear-side connection >Flat copper strip, with holes [min.]	2 x 16 x 0.8 mm
Al conductors, Cu cable >Bolt terminal and rear-side connection >Flat copper strip, with holes [max.]	10 x 16 x 0.8 mm
Cu strip (number of segments x width x segment thickness) >Box terminal [min.]	2 x 9 x 0.8 mm
Cu strip (number of segments x width x segment thickness) >Box terminal [max.]	10 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 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.]	10 x 16 x 0.8 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Screw connection	M8
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [min.]	16 x 5 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [max.]	20 x 5 mm
Control cables	1 x (18 … 14) 2 x (18 … 16) mm2
Rated operational current for specified heat dissipation [In]	250 A
Equipment heat dissipation, current-dependent [Pvid]	59.44 W
Operating ambient temperature min.	-25 °C
Operating ambient temperature max.	+70 °C
10.2 Strength of materials and parts >10.2.2 Corrosion resistance	Meets the product standard´s requirements.
10.2 Strength of materials and parts >10.2.3.1 Verification of thermal stability of enclosures	Meets the product standard´s requirements.
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	Does not apply, since the entire switchgear needs to be evaluated.
10.2 Strength of materials and parts >10.2.6 Mechanical impact	Does not apply, since the entire switchgear needs to be evaluated.
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	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	Does not apply, since the entire switchgear needs to be evaluated.
10.7 Internal electrical circuits and connections	Is the panel builder´s responsibility.
10.8 Connections for external conductors	Is the panel builder´s responsibility.
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	The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
10.11 Short-circuit rating	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
10.12 Electromagnetic compatibility	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
10.13 Mechanical function	The device meets the requirements, provided the information in the instruction leaflet (IL) is observed.
Overload release current setting	0 - 0 A
Adjustment range undelayed short-circuit release	8 - 10 A
With thermal protection	No
Phase failure sensitive	No
Switch off technique	Magnetic
Rated operating voltage	690 - 690 V
Rated permanent current Iu	250 A
Rated operation power at AC-3, 230 V	75 kW
Rated operation power at AC-3, 400 V	132 kW
Type of electrical connection of main circuit	Screw connection
Type of control element	Rocker lever
Device construction	Built-in device fixed built-in technique
With integrated auxiliary switch	No
With integrated under voltage release	No
Number of poles	3
Rated short-circuit breaking capacity lcu at 400 V, AC	50 kA
Degree of protection (IP)	IP20
Height	195 mm
Width	105 mm
Depth	149 mm
Product Standards	UL 489; CSA-C22.2 No. 5-09; IEC 60947-2; CE marking
UL File No.	E31593
UL Category Control No.	DKPU2
CSA File No.	022086
CSA Class No.	1432-01
North America Certification	UL recognized, CSA certified
Conditions of Acceptability	Only used in motor circuits in conjunction with suitable contactor and overload relay. SCCR value applies for complete combination starter only, consisting of instantaneous trip circuit breaker, contactor and overload relay.
Specially designed for North America	Yes
Suitable for	Branch circuits, feeder circuits
Current Limiting Circuit-Breaker	No
Max. Voltage Rating	600Y/347 V, 480 V
Degree of Protection	IEC: IP20; UL/CSA Type: -
Characteristic curve
Characteristic curve	Short-circuit protection only!
Characteristic curve

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