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NZMB1-A32

Circuit Breaker

NZMB1-A32

Circuit Breaker

NZMB1-A32

Circuit Breaker

NZMB1-A32 Circuit Breaker
  • Switching capacity 400/415 V 50 Hz( Icu ): 25 kA
  • Rated current = rated uninterrupted current (In = Iu ): 32 A
  • Installation type: Fixed
  • Standard/Approval: IEC
  • 3 Poles

Alternate Part Number: 280989

EL-Nummer (Norway): 4358977

Description:

NZMB1-A32 Circuit-breaker NZM1, 3 pole, Switching capacity 400/415 V 50 Hz( Icu ): 25 kA, Rated current = rated uninterrupted current Rated current = rated uninterrupted current( In = Iu ): 32 A, Installation type: Fixed, Box terminal, Standard/Approval: IEC, Protective function: System and cable protection

NZMB1-A32

Technical Specifications

Main Specifications

DescriptionNZMB1-A32 Base Unit
Product rangeCircuit-breaker
Protective functionSystem and cable protection
Standard/ApprovalIEC
Installation typeFixed
Release systemThermomagnetic release
Construction sizeNZM1
Number of poles3 pole
Standard equipmentBox terminal
400/415 V 50 Hz [Icu ]25 kA
Rated current = rated uninterrupted current [In = Iu]32 A
Overload trip25 - 32 A
Short-circuit releases [Irm ]
Non-delayed [Ii = In x …]
350 A fixed
Short-circuit releases [Irm ]
min.
350 A
DescriptionNZMB1-A32 Base Unit
StandardsIEC/EN 60947
Protection against direct contactFinger and back of hand proof to VDE 0106 Part 100
Climatic proofingDamp 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 60068-2-2720 (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 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 supplyas 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)Temperature dependency, Derating
DescriptionNZMB1-A32 Base Unit
Rated current = rated uninterrupted current [In = Iu]32 A
Rated surge voltage invariability [Uimp ]
Main contacts
6000 V
Rated surge voltage invariability [Uimp ]
Auxiliary contacts
6000 V
Rated operational voltage [Ue]440 V AC
Overvoltage category/pollution degreeIII/3
Rated insulation voltage [Ui ]690 V
Use in unearthed supply systems≦ 440 V
DescriptionNZMB1-A32 Base Unit
Rated short-circuit making capacity [Icm ]
240 V [Icm ]
63 kA
Rated short-circuit making capacity [Icm ]
400/415 V [Icm ]
53 kA
Rated short-circuit making capacity [Icm ]
440 V 50/60 Hz [Icm ]
53 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 ]
30 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 ]
25 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 ]
25 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 ]
25 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 ]
18.5 kA
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.
Utilization category to IEC/EN 60947-2A
Lifespan, mechanical(of which max. 50 % trip by shunt/undervoltage release) [Operations]20000
Lifespan, electrical
AC-1
400 V 50/60 Hz [Operations]
7500
Lifespan, electrical
AC-1
415 V 50/60 Hz [Operations]
7500
Lifespan, electrical
Max. operating frequency
120 Ops/h
Total break time at short-circuit< 10 ms
DescriptionNZMB1-A32 Base Unit
Standard equipmentBox terminal
Optional accessoriesScrew connection
Tunnel terminal
connection on rear
Round copper conductor
Box terminal
Solid
1 x (10 - 16)
2 x (6 - 16) mm2
Round copper conductor
Box terminal
Stranded
1 x (10 - 70) 3)
2 x (6-25) mm2
Round copper conductor
Box terminal
3) Up to 95 mm² can be connected depending on the cable manufacturer.
Round copper conductor
Tunnel terminal
Solid
1 x 16 mm2
Round copper conductor
Tunnel terminal
Stranded
1-hole
1 x (25 - 95) mm2
Round copper conductor
Bolt terminal and rear-side connection
Direct on the switch
Solid
1 x (10 - 16)
2 x (6 - 16) mm2
Round copper conductor
Bolt terminal and rear-side connection
Direct on the switch
Stranded
1 x (10 - 70) 3)
2 x 25 mm2
Round copper conductor
Bolt terminal and rear-side connection
Direct on the switch
3) Up to 95 mm² can be connected depending on the cable manufacturer.
Al circular conductor
Tunnel terminal
Solid
1 x 16 mm2
Al circular conductor
Tunnel terminal
Stranded
Stranded
1 x (25 - 95) mm2
Al circular conductor
Bolt terminal and rear-side connection
Direct on the switch
Solid
1 x (10 - 16)
2 x (10 - 16) mm2
Al circular conductor
Bolt terminal and rear-side connection
Direct on the switch
Stranded
1 x (25 - 35)
2 x (25 - 35) mm2
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.]
9 x 9 x 0.8 mm
Copper busbar (width x thickness) [mm]
Bolt terminal and rear-side connection
Screw connection
M6
Copper busbar (width x thickness) [mm]
Bolt terminal and rear-side connection
Direct on the switch [min.]
12 x 5 mm
Copper busbar (width x thickness) [mm]
Bolt terminal and rear-side connection
Direct on the switch [max.]
16 x 5 mm
Control cables1 x (0.75 - 2.5)
2 x (0.75 - 1.5) mm2
DescriptionNZMB1-A32 Base Unit
Rated operational current for specified heat dissipation [In]32 A
Equipment heat dissipation, current-dependent [Pvid]9.31 W
Operating ambient temperature min.-25 °C
Operating ambient temperature max.+70 °C
DescriptionNZMB1-A32 Base Unit
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 ASSEMBLIESDoes not apply, since the entire switchgear needs to be evaluated.
10.4 Clearances and creepage distancesMeets the product standard's requirements.
10.5 Protection against electric shockDoes not apply, since the entire switchgear needs to be evaluated.
10.6 Incorporation of switching devices and componentsDoes not apply, since the entire switchgear needs to be evaluated.
10.7 Internal electrical circuits and connectionsIs the panel builder's responsibility.
10.8 Connections for external conductorsIs 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 riseThe panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices.
10.11 Short-circuit ratingIs the panel builder's responsibility. The specifications for the switchgear must be observed.
10.12 Electromagnetic compatibilityIs the panel builder's responsibility. The specifications for the switchgear must be observed.
10.13 Mechanical functionThe device meets the requirements, provided the information in the instruction leaflet (IL) is observed.
DescriptionNZMB1-A32 Base Unit
Low-voltage industrial components (EG000017) / Power circuit-breaker for trafo/generator/installation protection (EC000228)
Electric engineering, automation, process control engineering / Low-voltage switch technology / Circuit breaker (LV < 1 kV) / Circuit breaker for power transformer, generator and system protection (ecl@ss10.0.1-27-37-04-09 [AJZ716013])
Rated permanent current Iu32 A
Rated voltage440 - 440 V
Rated short-circuit breaking capacity lcu at 400 V, 50 Hz25 kA
Overload release current setting25 - 32 A
Adjustment range short-term delayed short-circuit release0 - 0 A
Adjustment range undelayed short-circuit release350 - 350 A
Integrated earth fault protectionNo
Type of electrical connection of main circuitFrame clamp
Device constructionBuilt-in device fixed built-in technique
Suitable for DIN rail (top hat rail) mountingNo
DIN rail (top hat rail) mounting optionalYes
Number of auxiliary contacts as normally closed contact0
Number of auxiliary contacts as normally open contact0
Number of auxiliary contacts as change-over contact0
With switched-off indicatorNo
With under voltage releaseNo
Number of poles3
Position of connection for main current circuitFront side
Type of control elementRocker lever
Complete device with protection unitYes
Motor drive integratedNo
Motor drive optionalNo
Degree of protection (IP)IP20
DescriptionNZMB1-A32 Base Unit
Characteristic curve NZMB1-A32 Characteristic Curve
Characteristic curve NZMB1-A32 Characteristic Curve
Let-Through Current
Characteristic curve NZMB1-A32 Characteristic Curve
Let-Through Energy
DescriptionNZMB1-A32 Base Unit
NZMB1-A32 Dimensions
① Blow out area, minimum clearance to adjacent parts
NZMB1-A32 Dimensions