NZMH1-A20-S14
118841 NZMH1-A20-S14
118841

LS 3p system/cable protection, IR=14-20A
NZM..-A range circuit breaker range covers all use cases with just four compact sizes and is suitable for the IEC market. Modular function groups always make mounting flexible. With thermomagnetic releases for systems and cable protection.

Product range	Circuit-breaker
Protective function	System and cable protection
Standard/Approval	IEC
Installation type	Fixed
Release system	Electronic release
Construction size	NZM1
Number of poles	3 pole
Standard equipment	Box terminal
400/415 V 50 Hz [Icu ]	150 kA
Rated current = rated uninterrupted current [In = Iu]	20 A
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
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 current = rated uninterrupted current [In = Iu]	20 A
Rated surge voltage invariability [Uimp ] >Main contacts	6000 V
Rated surge voltage invariability [Uimp ] >Auxiliary contacts	6000 V
Rated operational voltage [Ue]	690 V AC
Rated operational voltage [Ue]	450 V DC
Overvoltage category/pollution degree	The following settings are required in order to ensure correct tripping: The fast-response release will take longer to respond when used for DC applications. Because of this, the setting on the trip block inscription, which is specified for AC currents, must be set to a lower value for DC currents. DC correction factor for instantaneous release response value: o NZM1: 1.25 o NZM2: 1.35 o NZM3: 1.45 Example: NZM3 Ie = 500A. Desired DC tripping current: 10 * Ie = 5000A. Calculation: • Desired DC value / correction factor = AC setting on trip block • 5000A / 1.45 = 3448 A ~ 7 * Ie = Value that needs to be set on the trip block Permitted circuit configurations:
Rated insulation voltage [Ui ]	III/3
Use in unearthed supply systems	690 V
Rated short-circuit making capacity [Icm ] >240 V [Icm ]	≦ 690 V
Rated short-circuit making capacity [Icm ] >400/415 V [Icm ]	220 kA
Rated short-circuit making capacity [Icm ] >440 V 50/60 Hz [Icm ]	330 kA
Rated short-circuit making capacity [Icm ] >525 V 50/60 Hz [Icm ]	154 kA
Rated short-circuit making capacity [Icm ] >690 V 50/60 H [Ic]	44 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 ]	20 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 ]	100 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 ]	150 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 ]	70 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 ] >Icu to IEC/EN 60947 test cycle O-t-CO [Icu] >500 V DC [Icu]	10 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 ]	30 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 ]	100 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 ]	50 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 ]	35 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]	10 kA
Rated short-circuit breaking capacity Icn [Icn ] >Ics to IEC/EN 60947 test cycle O-t-CO-t-CO [Ics] >450 V DC [Ics]	7.5 kA
Rated short-circuit breaking capacity Icn [Icn ]	30 kA
Utilization category to IEC/EN 60947-2	Maximum back-up fuse, if the expected short-circuit currents at the installation location exceed the switching capacity of the circuit-breaker.
Lifespan, mechanical(of which max. 50 % trip by shunt/undervoltage release) [Operations]	A
Lifespan, electrical >AC-1 >400 V 50/60 Hz [Operations]	20000
Lifespan, electrical >AC-1 >415 V 50/60 Hz [Operations]	10000
Lifespan, electrical >AC-1 >690 V 50/60 Hz [Operations]	10000
Lifespan, electrical >DC-1 >450 V DC [Operations]	7500
Lifespan, electrical >Max. operating frequency	10000
Total break time at short-circuit	120 Ops/h
Standard equipment	< 10 ms
Optional accessories	Box terminal
Round copper conductor >Box terminal >Solid	Screw connection Tunnel terminal connection on rear
Round copper conductor >Box terminal >Stranded	1 x (6 - 16) 2 x (4 - 16) mm2
Round copper conductor >Box terminal	1 x (6 - 70) 3) 2 x (4 - 25) mm2
Round copper conductor >Tunnel terminal >Solid	3) Up to 95 mm² can be connected depending on the cable manufacturer.
Round copper conductor >Tunnel terminal >Stranded >1-hole	1 x 16 mm2
Round copper conductor >Bolt terminal and rear-side connection >Direct on the switch >Solid	1 x (25 - 95) mm2
Round copper conductor >Bolt terminal and rear-side connection >Direct on the switch >Stranded	1 x (6 - 16) 2 x (4 - 16) mm2
Round copper conductor >Bolt terminal and rear-side connection >Direct on the switch	1 x (6 - 70) 3) 2 x (4 - 25) mm2
Al circular conductor >Tunnel terminal >Solid	3) Up to 95 mm² can be connected depending on the cable manufacturer.
Al circular conductor >Tunnel terminal >Stranded >Stranded	1 x 16 mm2
Cu strip (number of segments x width x segment thickness) >Box terminal [min.]	1 x (25 - 95) mm2
Cu strip (number of segments x width x segment thickness) >Box terminal [max.]	2 x 9 x 0.8 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Screw connection	9 x 9 x 0.8 mm
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [min.]	M6
Copper busbar (width x thickness) [mm] >Bolt terminal and rear-side connection >Direct on the switch [max.]	12 x 5 mm
Control cables	16 x 5 mm
Rated operational current for specified heat dissipation [In]	1 x (0.75 - 2.5) 2 x (0.75 - 1.5) mm2
Equipment heat dissipation, current-dependent [Pvid]	20 A
Operating ambient temperature min.	9.82 W
Operating ambient temperature max.	-25 °C
10.2 Strength of materials and parts >10.2.2 Corrosion resistance	+70 °C
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	Meets the product standard´s requirements.
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	Does not apply, since the entire switchgear needs to be evaluated.
10.3 Degree of protection of ASSEMBLIES	Meets the product standard´s requirements.
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	Does not apply, since the entire switchgear needs to be evaluated.
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	Is the panel builder´s responsibility.
10.11 Short-circuit rating	The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
10.12 Electromagnetic compatibility	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.
10.13 Mechanical function	Is the panel builder´s responsibility. The specifications for the switchgear must be observed.

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