NZMB1-A20 – EATON

NZMB1-A20 – Circuit-breaker, 3p, 20°
280987
DELIVERY PROGRAM
Product range
Circuit-breaker
Protective function
System and cable protection
Standard/Approval
IEC
Installation type
Fixed
Release system
Thermomagnetic release
Construction size
NZM1
Number of poles
3 pole
Standard equipment
Box terminal
Switching capacity
400/415 V 50 Hz [Icu ]
25 kA
Rated current = rated uninterrupted current [In = Iu ]
Rated current = rated uninterrupted current [In = Iu]
20 A
Setting range
Overload trip
[Ir ]
15 – 20 A
Short-circuit releases [Irm ]
Non-delayed [Ii = In x …]
350 A fixed
Short-circuit releases [Irm ]
min.
350 A
TECHNICAL DATA
General
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)
Temperature dependency, Derating
Circuit-breakers
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]
440 V AC
Overvoltage category/pollution degree
III/3
Rated insulation voltage [Ui ]
690 V
Use in unearthed supply systems
≦ 440 V
Switching capacity
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 60947-2
A
Lifespan, mechanical(of which max. 50 % trip by shunt/undervoltage release) [Operations]
20000
Lifespan, electrical
AC-1
400 V 50/60 Hz [Operations]
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 Terminal capacity Standard equipment Box terminal Optional accessories Screw connection Tunnel terminal connection on rear Round copper conductor Box terminal Solid 1 x (6 - 16) 2 x (4 - 16) mm2 Round copper conductor Box terminal Stranded 1 x (6 - 70) 3) 2 x (4 - 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 (6 - 16) 2 x (4 - 16) mm2 Round copper conductor Bolt terminal and rear-side connection Direct on the switch Stranded 1 x (6 - 70) 3) 2 x (4 - 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 cables 1 x (0.75 - 2.5) 2 x (0.75 - 1.5) mm2 DESIGN VERIFICATION AS PER IEC/EN 61439 Technical data for design verification Rated operational current for specified heat dissipation [In] 20 A Equipment heat dissipation, current-dependent [Pvid] 9.82 W Operating ambient temperature min. -25 °C Operating ambient temperature max. +70 °C IEC/EN 61439 design verification 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. TECHNICAL DATA ETIM 8.0 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 Iu 400 A Rated voltage 440 - 440 V Rated short-circuit breaking capacity lcu at 400 V, 50 Hz 25 kA Overload release current setting 15 - 20 A Adjustment range short-term delayed short-circuit release 0 - 0 A Adjustment range undelayed short-circuit release 350 - 350 A Integrated earth fault protection No Type of electrical connection of main circuit Frame clamp Device construction Built-in device fixed built-in technique Suitable for DIN rail (top hat rail) mounting No DIN rail (top hat rail) mounting optional Yes Number of auxiliary contacts as normally closed contact 0 Number of auxiliary contacts as normally open contact 0 Number of auxiliary contacts as change-over contact 0 With switched-off indicator No With integrated under voltage release No Number of poles 3 Position of connection for main current circuit Front side Type of control element Rocker lever Complete device with protection unit Yes Motor drive integrated No Motor drive optional No Degree of protection (IP) IP20