NZMH3-S250-SVE
168916 NZMH3-S250-SVE
168916

Circuit-breaker, 3p, 250A, withdrawable unit
Series NZM circuit-breakers cover all application cases with just four compact sizes and are suitable for the IEC market. Installation is always flexible thanks to the use of modular function groups.

Description	Motor protection in conjunction with overload relay With short-circuit release Without overload release Ir IEC/EN 60947-4-1, IEC/EN 60947-2 The circuit-breaker fulfills all requirements for AC-3 switching category.
Rated current = rated uninterrupted current [In = Iu]	250 A
400/415 V 50 Hz [Icu ]	150 kA
Short-circuit releases [Irm ] >Non-delayed [Ii = In x …]	8 - 14
380 V 400 V [P]	132 kW
400 V [Ie ]	231 A
Ambient temperature >Ambient temperature, storage	- 40 - + 70 °C
Ambient temperature >Operation	-25 - +70 °C
Rated current = rated uninterrupted current [In = Iu]	250 A
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 ]	150 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >500 V DC [Icu]	70 kA
Rated short-circuit breaking capacity Icn [Icn ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >750 V DC [Icu]	70 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >500 V DC [Ics]	70 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >750 V DC [Ics]	70 kA
Rated operational current for specified heat dissipation [In]	250 A
Equipment heat dissipation, current-dependent [Pvid]	68.25 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 - 14 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	Other
Type of control element	Rocker lever
Device construction	Built-in device plug-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	150 kA
Degree of protection (IP)	IP20
Height	215.2 mm
Width	140 mm
Depth	335 mm
Characteristic curve

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