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Thermal overload relay
| Product Weight | 0.142 kg |
| Product Length/Depth | 88 mm |
| Product Height | 67 mm |
| Product Width | 45 mm |
| Degree Of Protection | IP00 |
| Mounting Method | Direct attachment Direct mounting |
Motor Protection, Overload Detection, Pump & Fan Control and more.
Eaton Moeller® series ZB Thermal overload relay supplied by Eaton rated 1.5 A at 600 VAC.
Key performance data includes Product type: Thermal overload relay.
Typical applications include Motor Protection, Overload Detection, Pump & Fan Control and more.
| General Information | |
|---|---|
| Product Name | Eaton Moeller® series ZB Thermal overload relay |
| Catalog Number | 278438 |
| Model Code | ZB12-4 |
| UPC | 782116358687 |
| EAN | 4015082784386 |
| Global Catalog | 278438 |
| Product Type | Thermal overload relay |
| Product category | AccessoriesOverload relay ZB up to 150 A |
| Electrical connection type of main circuit | Screw connection |
| Electrical Characteristics | |
|---|---|
| 10.11 Short-circuit rating | Is the panel builder's responsibility. The specifications for the switchgear must be observed. |
| 10.2.2 Corrosion resistance | 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. |
| 10.2.4 Resistance to ultra-violet (UV) radiation | Meets the product standard's requirements. |
| 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. |
| Class | CLASS 10 A / IEC 60947-4-1, 8.2.1.5.1.1. c) 4 min |
| Rated impulse withstand voltage (Uimp) | 6000 V AC 4000 V (auxiliary and control circuits) |
| Rated operational current (Ie) at AC-15, 220 V, 230 V, 240 V | 1.5 A |
| Rated operational current (Ie) at AC-15, 380 V, 400 V, 415 V | 0.9 A |
| Rated operational current (Ie) at DC-13, 110 V | 0.4 A |
| Rated operational current (Ie) at DC-13, 220 V, 230 V | 0.2 A |
| Rated operational current (Ie) at DC-13, 24 V | 0.9 A |
| Rated operational current (Ie) at DC-13, 60 V | 0.75 A |
| Rated operational current for specified heat dissipation (In) | 4 A |
| Static heat dissipation, non-current-dependent Pvs | 0 W |
| Voltage rating - max | 600 VAC |
| Adjustable current range - max | 4 A |
| Adjustable current range - min | 2.4 A |
| Conventional thermal current Ith of auxiliary contacts (1-pole, open) | 6 A |
| Equipment heat dissipation, current-dependent Pvid | 6 W |
| Heat dissipation capacity Pdiss | 0 W |
| Heat dissipation per pole, current-dependent Pvid | 2 W |
| Overload release current setting - max | 4 A |
| Overload release current setting - min | 2.4 A |
| Rated operational voltage (Ue) - max | 690 V |
| Rated operational current (Ie) at AC-15, 120 V | 1.5 A |
| Overvoltage category | III |
| Safe isolation | 440 V, Between auxiliary contacts and main contacts, According to EN 61140 440 V AC, Between main circuits, According to EN 61140 240 V AC, Between auxiliary contacts, According to EN 61140 |
| Shock resistance | 10 g, Mechanical, Sinusoidal, Shock duration 10 ms |
| Short-circuit current rating (high fault at 600 V) | 6 A, Class J/CC, max. Fuse, SCCR (UL/CSA) 100 kA, Fuse, SCCR (UL/CSA) |
| Switching capacity (auxiliary contacts, pilot duty) | R300, DC operated (UL/CSA) B300 at opposite polarity, AC operated (UL/CSA) B600 at opposite polarity, AC operated (UL/CSA) |
| Short-circuit protection rating | 25 A gG/gL, Fuse, Type “1” coordination Max. 6 A gG/gL, fuse, Without welding, Auxiliary and control circuits 16 A gG/gL, Fuse, Type “2” coordination Information on Type "1" and Type"2" coordination applies to 100 kA and 690 V |
| Mechanical & Physical | |
|---|---|
| Product Length/Depth | 88 mm |
| Product Height | 67 mm |
| Product Width | 45 mm |
| Product Weight | 0.142 kg |
| 10.3 Degree of protection of assemblies | Does not apply, since the entire switchgear needs to be evaluated. |
| 10.5 Protection against electric shock | 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. |
| 10.9.4 Testing of enclosures made of insulating material | Is the panel builder's responsibility. |
| Stripping length (control circuit cable) | 8 mm |
| Stripping length (main cable) | 10 mm |
| Protection | Finger and back-of-hand proof, Protection against direct contact when actuated from front (EN 50274) |
| Frame size | ZB12 |
| Number of auxiliary contacts (change-over contacts) | 0 |
| Number of auxiliary contacts (normally closed contacts) | 1 |
| Number of auxiliary contacts (normally open contacts) | 1 |
| Number of contacts (normally closed contacts) | 1 |
| Number of contacts (normally open contacts) | 1 |
| Screwdriver size | 1 x 6 mm, Terminal screw, Standard screwdriver 2, Terminal screw, Pozidriv screwdriver |
| Mounting method | Direct attachment Direct mounting |
| Degree of protection | IP00 |
| Screw size | M4, Terminal screw M3.5, Terminal screw, Control circuit cables |
| Terminal capacity (flexible with ferrule) | 1 x (1 - 4) mm², Main cables 2 x (1 - 4) mm², Main cables 2 x (0.75 - 2.5) mm², Control circuit cables 1 x (0.75 - 2.5) mm², Control circuit cables |
| Terminal capacity (solid) | 2 x (0.75 - 4) mm², Control circuit cables 1 x (0.75 - 4) mm², Control circuit cables 1 x (1 - 6) mm², Main cables 2 x (1 - 6) mm², Main cables |
| Terminal capacity (solid/stranded AWG) | 18 - 8, Main cables 2 x (18 - 14), Control circuit cables |
| Tightening torque | 1.8 Nm, Screw terminals, Main cables 1.2 Nm, Screw terminals, Control circuit cables |
| Environmental & Compliance | |
|---|---|
| Certifications | UL File No.: E29184 CSA IEC/EN 60947 VDE 0660 IEC/EN 60947-4-1 UL 60947-4-1 CSA Class No.: 3211-03 UL CSA File No.: 012528 CE CSA-C22.2 No. 60947-4-1-14 UL Category Control No.: NKCR |
| 10.10 Temperature rise | The panel builder is responsible for the temperature rise calculation. Eaton will provide heat dissipation data for the devices. |
| Pollution degree | 3 |
| Climatic proofing | Damp heat, cyclic, to IEC 60068-2-30 Damp heat, constant, to IEC 60068-2-78 |
| Ambient operating temperature - max | 55 °C |
| Ambient operating temperature - min | -25 °C |
| Ambient operating temperature (enclosed) - max | 40 °C |
| Ambient operating temperature (enclosed) - min | -25 °C |
| Temperature compensation | ≤ 0.25 %/K, residual error for T > 40° Continuous |
| Additional Specifications | |
|---|---|
| Features | Trip-free release Reset pushbutton manual/auto Test/off button Phase-failure sensitivity (according to IEC/EN 60947, VDE 0660 Part 102) |
| 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. |
| 10.2.3.1 Verification of thermal stability of enclosures | 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. |
| 10.2.5 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. |
| 10.4 Clearances and creepage distances | 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. |
| Reset function | Automatic Push-button |
| Suitable for | Branch circuits, (UL/CSA) |
Note: Specifications are taken from the official Eaton ZB12-4 datasheet.
Official technical documentation for the ZB12-4.
Typical applications of the ZB12-4.
Other models in the Eaton Overload Relays product series.
