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NZMB1-A25-NA
Circuit Breaker
NZMB1-A25-NA
Circuit Breaker
NZMB1-A25-NA
Circuit Breaker
- Switching capacity SCCR 480 V 60 Hz( Icu ): 25 kA
- Rated current = rated uninterrupted current (In = Iu ): 25 A
- Installation type: Fixed
- Standard/Approval: UL/CSA, IEC
- 3 Poles
Alternate Part Number: 281560
Description:
NZMB1-A25-NA Circuit-breaker NZM1, 3 pole, Switching capacity SCCR 480 V 60 Hz( Icu ): 25 kA, Rated current = rated uninterrupted current (In = Iu ): 25 A, Installation type: Fixed, Box terminal, Standard/Approval: UL/CSA, IEC, Protective function: System and cable protection
NZMB1-A25-NA
Technical Specifications
Main Specifications
| Description | NZMB1-A25-NA Base Unit |
|---|---|
| Product range | Circuit-breaker |
| Protective function | System and cable protection |
| Standard/Approval | IEC, UL |
| Release system | Thermomagnetic release |
| Installation type | Fixed |
| Description | Adjustable overload releases Ir |
| Frame size | NZM1 |
| Number of poles | 3 pole |
| Standard equipment | Box terminal |
| SCCR 480Y/277 V 60 Hz [Icu] | 25 kA |
| Rated current = rated uninterrupted current [In = Iu] | 25 A |
| Overload trip | 20 - 25 A |
| Short-circuit releases [Irm
] Non-delayed [Ii = In x …] | 350 A fixed |
| Description | NZMB1-A25-NA Base Unit | |
|---|---|---|
| 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 | |
| Description | NZMB1-A25-NA Base Unit |
|---|---|
| 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 |
| Description | NZMB1-A25-NA 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 low-voltage h.b.c. fuse | 200 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. |
| Technical data that diverge from products for the IEC market Switching capacity of NA switches (UL489, CSA 22.2 No. 5.1) Short-circuit current rating SCCR SCCR 240 V 60 Hz [Icu] | 35 kA |
| Technical data that diverge from products for the IEC market Switching capacity of NA switches (UL489, CSA 22.2 No. 5.1) Short-circuit current rating SCCR SCCR 480Y/277 V 60 Hz [Icu] | 25 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] | 7500 |
| Lifespan, electrical Max. operating frequency | 120 Ops/h |
| Total break time at short-circuit | < 10 ms |
| Description | NZMB1-A25-NA Base Unit |
|---|---|
| Standard equipment | Box terminal |
| Round copper conductor Box terminal Solid | 1 x (12 … 6) mm2 |
| Round copper conductor Box terminal Stranded | 1 x (4 … 2/0) mm2 |
| Round copper conductor Tunnel terminal Solid | 1 x 6 mm2 |
| Round copper conductor Tunnel terminal Stranded Stranded | 1 x (4 … 3/0) mm2 |
| Round copper conductor Bolt terminal and rear-side connection Direct on the switch Solid | 1 x (12 … 6) 2 x (9 … 6) mm2 |
| Round copper conductor Bolt terminal and rear-side connection Direct on the switch Stranded | 1 x (4 … 2/0) mm2 |
| Al conductors, Cu cable Tunnel terminal Solid | 1 x 16 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 (18 … 14) 2 x (18 … 16) mm2 |
| Description | NZMB1-A25-NA Base Unit |
|---|---|
| Rated operational current for specified heat dissipation [In] | 25 A |
| Equipment heat dissipation, current-dependent [Pvid] | 8.78 W |
| Operating ambient temperature min. | -25 °C |
| Operating ambient temperature max. | +70 °C |
| Description | NZMB1-A25-NA 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 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. |
| Description | NZMB1-A25-NA 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 Iu | 25 A |
| Rated voltage | 440 - 440 V |
| Rated short-circuit breaking capacity lcu at 400 V, 50 Hz | 25 kA |
| Overload release current setting | 20 - 25 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 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 |
| Description | NZMB1-A25-NA Base Unit |
|---|---|
| Product Standards | UL 489; IEC 60947-2; CE marking |
| UL File No. | E31593 |
| UL Category Control No. | DIVQ |
| North America Certification | UL listed |
| Specially designed for North America | Yes |
| Suitable for | Feeder circuits, branch circuits |
| Current Limiting Circuit-Breaker | Yes |
| Max. Voltage Rating | 480Y/277 V |
| Degree of Protection | IEC: IP20; UL/CSA Type: - |
| Description | NZMB1-A25-NA Base Unit |
|---|---|
| Characteristic curve |
|
| Short-circuit protection only! | |
| Characteristic curve |
|
| Characteristic curve |
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| Description | NZMB1-A25-NA Base Unit |
|---|---|
|
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| ① Blow out area, minimum clearance to adjacent parts | |
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