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NZM molded case circuit breaker thermo-magnetic
| Product Weight | 2.36 kg |
| Product Length/Depth | 149 mm |
| Product Height | 184 mm |
| Product Width | 105 mm |
Use in unearthed supply systems at 440 V
Eaton Moeller series NZM - Molded Case Circuit Breaker. Circuit-breaker, 3p, 125A, B, frame2, A125
Key technical data includes Amperage Rating: 125 A; Application: Use in unearthed supply systems at 440 V; Features: Protection unit Motor drive optional.
| General Information | |
|---|---|
| Product Name | Eaton Moeller series NZM molded case circuit breaker thermo-magnetic |
| Catalog Number | 259087 |
| Model Code | NZMB2-A125 |
| EAN | 4015082590871 |
| Product Length/Depth | 149 mm |
| Product Height | 184 mm |
| Product Width | 105 mm |
| Product Weight | 2.36 kg |
| Compliances | RoHS conform |
| Certifications | IEC/EN 60947 |
| Amperage Rating | 125 A |
| Application | Use in unearthed supply systems at 440 V |
| Features | Protection unit Motor drive optional |
| Number of poles | Three-pole |
| Special features | Maximum back-up fuse, if the expected short-circuit currents at the installation location exceed the switching capacity of the circuit breaker (Rated short-circuit breaking capacity Icn) Rated current = rated uninterrupted current: 125 A |
| Standards & Design Verification | |
|---|---|
| 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. |
| 10.2.2 Corrosion resistance | Meets the product standard's requirements. |
| 10.2.3.1 Verification of thermal stability of enclosures | Meets the product standard's requirements. |
| 10.2.3.2 Verification of resistance of insulating materials to normal heat | Meets the product standard's requirements. |
| 10.2.3.3 Resist. of insul. mat. to abnormal heat/fire by internal elect. effects | Meets the product standard's requirements. |
| 10.2.4 Resistance to ultra-violet (UV) radiation | Meets the product standard's requirements. |
| 10.2.5 Lifting | Does not apply, since the entire switchgear needs to be evaluated. |
| 10.2.6 Mechanical impact | Does not apply, since the entire switchgear needs to be evaluated. |
| 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. |
| 10.9.2 Power-frequency electric strength | Is the panel builder's responsibility. |
| 10.9.3 Impulse withstand voltage | Is the panel builder's responsibility. |
| 10.9.4 Testing of enclosures made of insulating material | Is the panel builder's responsibility. |
| Ambient operating temperature - max | 70 °C |
| Ambient storage temperature - max | 70 °C |
| Ambient operating temperature - min | -25 °C |
| Ambient storage temperature - min | 40 °C |
| Equipment heat dissipation, current-dependent | 27.61 W |
| Electrical Characteristics | |
|---|---|
| Amperage Rating | 125 A |
| Direction of incoming supply | As required |
| Electrical connection type of main circuit | Screw connection |
| Handle type | Rocker lever |
| Instantaneous current setting (Ii) - max | 1250 A |
| Instantaneous current setting (Ii) - min | 750 A |
| Isolation | 300 V AC (between the auxiliary contacts) 500 V AC (between auxiliary contacts and main contacts) |
| Lifespan, electrical | 10000 operations at 400 V AC-1 6500 operations at 415 V AC-3 10000 operations at 415 V AC-1 |
| Number of operations per hour - max | 120 |
| Overload current setting (Ir) - max | 125 A |
| Overload current setting (Ir) - min | 100 A |
| Overvoltage category | III |
| Pollution degree | 3 |
| Rated impulse withstand voltage (Uimp) at auxiliary contacts | 6000 V |
| Rated impulse withstand voltage (Uimp) at main contacts | 8000 V |
| Rated insulation voltage (Ui) | 690 V AC |
| Rated short-circuit breaking capacity Ics (IEC/EN 60947) at 230 V, 50/60 Hz | 30 kA |
| Rated short-circuit breaking capacity Ics (IEC/EN 60947) at 400/415 V, 50/60 Hz | 25 kA |
| Rated short-circuit breaking capacity Ics (IEC/EN 60947) at 440 V, 50/60 Hz | 18.5 kA |
| Rated short-circuit making capacity Icm at 240 V, 50/60 Hz | 63 kA |
| Rated short-circuit making capacity Icm at 400/415 V, 50/60 Hz | 53 kA |
| Rated short-circuit making capacity Icm at 440 V, 50/60 Hz | 53 kA |
| Short-circuit release non-delayed setting - max | 1250 A |
| Short-circuit release non-delayed setting - min | 750 A |
| Short-circuit total breaktime | < 10 ms |
| Utilization category | A (IEC/EN 60947-2) |
| Voltage rating | 440 V - 440 V |
| Mechanical & Physical | |
|---|---|
| Climatic proofing | Damp heat, constant, to IEC 60068-2-78 Damp heat, cyclic, to IEC 60068-2-30 |
| Degree of protection | IP20 (basic degree of protection, in the operating controls area) IP20 |
| Degree of protection (IP), front side | IP40 (with insulating surround) IP66 (with door coupling rotary handle) |
| Degree of protection (terminations) | IP10 (tunnel terminal) IP00 (terminations, phase isolator and strip terminal) |
| Lifespan, mechanical | 20000 operations |
| Mounting Method | Built-in device fixed built-in technique DIN rail (top hat rail) mounting optional Fixed |
| Number of auxiliary contacts (change-over contacts) | 0 |
| Number of auxiliary contacts (normally closed contacts) | 0 |
| Number of auxiliary contacts (normally open contacts) | 0 |
| Position of connection for main current circuit | Front side |
| Protection against direct contact | Finger and back-of-hand proof to DIN EN 50274/VDE 0106 part 110 |
| Shock resistance | 20 g (half-sinusoidal shock 20 ms) |
| Special features | Maximum back-up fuse, if the expected short-circuit currents at the installation location exceed the switching capacity of the circuit breaker (Rated short-circuit breaking capacity Icn) Rated current = rated uninterrupted current: 125 A |
| Terminal Capacities | |
|---|---|
| Standard terminals | Screw terminal |
| Terminal capacity (aluminum solid conductor/cable) | 10 mm² - 16 mm² (1x) direct at switch rear-side connection 10 mm² - 16 mm² (2x) direct at switch rear-side connection 16 mm² (1x) at tunnel terminal |
| Terminal capacity (aluminum stranded conductor/cable) | 25 mm² - 50 mm² (1x) direct at switch rear-side connection 25 mm² - 50 mm² (2x) direct at switch rear-side connection 25 mm² - 185 mm² (1x) at tunnel terminal |
| Terminal capacity (control cable) | 0.75 mm² - 1.5 mm² (2x) 0.75 mm² - 2.5 mm² (1x) |
| Terminal capacity (copper busbar) | Min. 16 mm x 5 mm direct at switch rear-side connection M8 at rear-side screw connection Max. 20 mm x 5 mm direct at switch rear-side connection |
| Terminal capacity (copper solid conductor/cable) | 4 mm² - 16 mm² (2x) at box terminal 4 mm² - 16 mm² (2x) direct at switch rear-side connection 4 mm² - 16 mm² (1x) at box terminal 4 mm² - 16 mm² (1x) direct at switch rear-side connection 16 mm² (1x) at tunnel terminal |
| Terminal capacity (copper stranded conductor/cable) | 25 mm² - 185 mm² (1x) direct at switch rear-side connection 25 mm² - 70 mm² (2x) direct at switch rear-side connection 25 mm² - 185 mm² (1x) at box terminal 25 mm² - 185 mm² (1x) at 1-hole tunnel terminal 25 mm² - 70 mm² (2x) at box terminal |
| Terminal capacity (copper strip) | Max. 10 segments of 16 mm x 0.8 mm at rear-side connection (punched) Min. 2 segments of 9 mm x 0.8 mm at box terminal Max. 10 segments of 16 mm x 0.8 mm at box terminal Min. 2 segments of 16 mm x 0.8 mm at rear-side connection (punched) |
Note: Specifications are taken from the official Eaton NZMB2-A125 product data sheet.
Official technical documentation for the NZMB2-A125.
Typical applications of the NZMB2-A125.
Other models in the Eaton Molded Case Circuit Breakers product series.
