Description
The ABB PKZMO-10-T is a compact, high-reliability motor protection circuit breaker designed for overload and short-circuit protection in low-voltage (LV) motor control applications. Part of ABB’s PKZM0 Series (also known as “Pilz” series), this device combines the functions of a circuit breaker, thermal overload relay, and auxiliary switch in a single modular unit, making it ideal for small to medium-sized motors in manufacturing, food & beverage, and building services. The PKZMO-10-T is engineered to protect motors with rated currents up to 10 A, ensuring safe operation while minimizing downtime through quick fault detection and easy maintenance.
As a key component in motor control centers (MCCs) and direct-on-line (DOL) starters, the ABB PKZMO-10-T features a thermomagnetic tripping mechanism that responds to both overloads (thermal element) and short circuits (magnetic element). Its compact design (just 18 mm wide) saves space in control panels, while the integrated auxiliary contacts (NO/NC) enable remote status monitoring via PLCs or HMIs. The PKZMO-10-T is part of ABB’s drive to simplify industrial automation by reducing component count and enhancing system efficiency, making it a versatile solution for applications where reliability and space optimization are critical.
| Parameter Name |
Parameter Value |
| Product Model |
PKZMO-10-T |
| Manufacturer |
ABB |
| Product Type |
Motor Protection Circuit Breaker |
| Rated Current (In) |
0.16–10 A (adjustable) |
| Rated Voltage (Ue) |
690 V AC |
| Short-Circuit Rating |
16 kA at 400 V AC |
| Tripping Characteristics |
Thermal (overload) + magnetic (short circuit) |
| Auxiliary Contacts |
1 NO + 1 NC (10(4) A, 250 V AC/30 V DC) |
| Dimensions (W×H×D) |
18 mm × 90 mm × 60 mm |
| Mounting Method |
DIN rail (35 mm standard) |
| Operating Temperature |
-25°C to +60°C |
| Certification |
CE, UL, IEC 60947-2, IEC 60204-1 |
| Compliance |
RoHS, REACH |
Integrated Protection and Control: The PKZMO-10-T eliminates the need for separate thermal relays and circuit breakers, combining overload protection (with adjustable current settings from 0.16–10 A) and short-circuit protection (16 kA breaking capacity) in one device. This reduces wiring complexity and panel space by up to 50%, while the thermomagnetic trip unit ensures precise fault discrimination between normal motor starting currents and actual faults.
Compact and Rugged Design: With a width of just 18 mm, the PKZMO-10-T is ideal for space-constrained applications like compact MCCs or distributed control panels in packaging machines. The flame-retardant housing and reinforced terminals withstand harsh environments, including vibration and temperature fluctuations, making it suitable for food processing lines or outdoor installations with proper enclosures.
Easy Installation and Maintenance: The plug-in design allows quick replacement without tools, while the front-mounted adjustment dial and status indicators (trip, overload, and auxiliary contact status) simplify setup and diagnostics. The auxiliary contacts can be used to signal fault conditions to a PLC or trigger alarms, enabling proactive maintenance and reducing mean time to repair (MTTR).
Cost-Effective and Versatile: By combining multiple functions, the PKZMO-10-T lowers hardware and installation costs compared to traditional relay-breaker combinations. It is compatible with ABB’s AF Series contactors and TA Series thermal relays for scalable motor control solutions, and its wide current range makes it suitable for motors in applications such as pumps, fans, conveyors, and small machine tools.
The ABB PKZMO-10-T is widely used in industries requiring reliable motor protection in compact footprints:
- Manufacturing: Protects motors in assembly lines, robotics, and material handling systems. For example, in a automotive parts plant, it safeguards conveyor belt motors from overloads caused by jammed materials, ensuring uninterrupted production.
- Food and Beverage: Used in mixers, packaging machines, and sterilization equipment, where its compact design and hygienic housing (optional stainless steel covers) meet strict industry standards. The PKZMO-10-T’s resistance to moisture and cleaning agents makes it suitable for washdown environments.
- Building Services: Installed in HVAC systems to protect pumps and fans in commercial buildings. Its ability to handle both short circuits and overloads ensures reliable operation of critical systems like chillers or air handling units (AHUs).
- Renewable Energy: Supports small-scale wind turbines or solar tracking systems by protecting drive motors from voltage fluctuations and mechanical overloads, extending equipment lifespan in remote or harsh environments.
- ABB PKZMO-16-T: A higher-current variant (0.63–16 A) for larger motors in industrial applications.
- ABB AF09-30-11 Contactor: A compatible contactor for motor starting, often paired with the PKZMO-10-T in DOL starter kits.
- ABB TA25DU Thermal Relay: A standalone thermal overload relay for retrofitting older systems, though the PKZMO-10-T offers integrated advantages.
- ABB Emax 2 E1N Circuit Breaker: A high-current circuit breaker for main distribution, complementary to the PKZMO-10-T in hierarchical protection schemes.
- ABB PSTX170-600-70 Soft Starter: Used with the PKZMO-10-T to reduce inrush currents in larger motors, enhancing system efficiency.
Pre-installation preparation: Mount the PKZMO-10-T on a 35 mm DIN rail in a control panel, ensuring adequate spacing for heat dissipation (minimum 25 mm between modules). Connect the motor and power supply using stranded or solid copper wires (max. 6 mm²), tightening terminals to the specified torque (2.5 N·m). Adjust the current setting dial to match the motor’s full-load current (FLC), and verify compatibility with the contactor’s coil voltage (e.g., 24 V DC or 230 V AC).
Maintenance recommendations: Inspect the device quarterly for signs of overheating (e.g., discolored housing) or loose connections, particularly in high-vibration environments. Test the trip functionality annually using a secondary injection test tool to ensure the thermal and magnetic elements operate within specified tolerances. Clean the auxiliary contacts with a dry cloth to prevent oxidation, and replace the module if the trip mechanism fails to reset or shows physical damage. For critical applications, maintain spare units on-site to minimize downtime during replacements.
ABB stands behind the PKZMO-10-T with a 3-year warranty, covering defects in materials and workmanship. ABB’s global service network provides technical support for product selection, installation guidance, and troubleshooting, ensuring optimal performance throughout the product lifecycle. The device’s compliance with international standards (IEC, UL) and environmental regulations (RoHS, REACH) guarantees long-term compatibility and sustainability. With its proven reliability and ease of use, the PKZMO-10-T is a trusted choice for motor protection in millions of installations worldwide, delivering peace of mind for operators in diverse industries.
Shanxi Xinyeda International Trading Co., Ltd. is your trusted partner, we provide and other automation spare parts sales and technical support. Please visit our website www.xydcontrol.com or contact us and we will be happy to serve you.
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