AB 190S-ANZJ2-CB25C Motor protection circuit breaker

Allen-Bradley 190S Series Motor Protection Circuit Breaker (MPCB) Overview

The Allen-Bradley 190S Series Motor Protection Circuit Breakers (MPCBs), part of Rockwell Automation's extensive motor control portfolio, are compact, robust devices designed to provide comprehensive protection for electric motors. They combine the functions of a circuit breaker (short-circuit protection), a thermal overload relay (overload protection), and a disconnect switch in a single unit. The 190S series is particularly noted for its space-saving design and ease of integration into motor control centers and industrial panels.

Product Detailed Description

• Integrated Protection: The 190S MPCB combines three essential motor control functions:

• Short-Circuit Protection: Protects the motor and associated wiring from damaging short-circuit currents.

• Thermal Overload Protection: Safeguards the motor from overheating due to sustained overcurrents or single-phasing conditions, using an adjustable thermal trip mechanism.

• Manual Motor Starter/Disconnect: Acts as a manual ON/OFF switch, providing a means of disconnecting the motor from the power source for maintenance or safety.

• Adjustable Thermal Trip: Features an adjustable dial for setting the motor's full load current (FLC), allowing precise overload protection tailored to the specific motor. This often includes a wide adjustment range.

• Magnetic Trip: Provides instantaneous short-circuit protection. The tripping current is typically fixed (e.g., 13 times the maximum thermal setting) to ensure fast clearance of fault currents.

• Operating Mechanism: Utilizes a rotary handle for manual switching (ON/OFF) and thermal/magnetic trip indication. The handle typically indicates the tripped state, making troubleshooting easier.

• Auxiliary Contacts (Optional): Can be fitted with auxiliary contacts (e.g., side-mounted or front-mounted) for remote signaling of ON/OFF status, trip status, or fault conditions to PLCs, control relays, or indicator lights.

• Busbar System Compatibility: Often designed to integrate seamlessly with Allen-Bradley's compact busbar systems for efficient power distribution in multi-motor applications.

• Compact Design: Its small footprint saves valuable panel space, making it ideal for tight enclosures.

• High Breaking Capacity: Capable of interrupting high short-circuit currents, ensuring safety and preventing extensive damage.

Product Parameters (Typical for 190S Series, specific to "25C" rating)

(Note: The "CB25C" likely implies "Circuit Breaker 25 Amperes with C-type trip curve". The "ANZJ2" portion would further define specific characteristics like auxiliary contact configuration or other options.)

• Rated Current (In):

• For "CB25C": Likely up to 25 Amperes (A).

• Thermal Trip Adjustment Range: Typically a wide range, e.g., 0.1A to 32A across the series, with the 25A model having a specific range around 25A (e.g., 18-25A or 20-25A).

• Rated Operating Voltage (Ue): Up to 690V AC (common across the series, though specific models might be limited).

• Rated Insulation Voltage (Ui): Typically 690V.

• Rated Impulse Withstand Voltage (Uimp): Varies, e.g., 6kV.

• Breaking Capacity (Icu/Ics): High breaking capacity, e.g., 50kA, 100kA at lower voltages, reducing at higher voltages (specific to the exact model).

• Trip Class: Usually Class 10 (standard motor protection), meaning it will trip within 10 seconds for 7.2 times the thermal setting.

• Number of Poles: 3-pole for 3-phase motor protection.

• Mounting: 35mm DIN rail mount.

• Connection Type: Screw terminals for main power and control wiring.

• Auxiliary Contacts: Optional, can vary (e.g., 1 NO + 1 NC, 2 NO, 2 NC).

• Degree of Protection (Front): Typically IP20 (finger safe terminals) or higher for the front face depending on mounting.

• Operating Temperature: Typically -20 °C to +60 °C.

• Certifications: UL, CSA, CE, CCC, RoHS compliant.

Product Advantages

• Space-Saving Design: Integrates multiple functions into a single, compact device, reducing panel footprint and overall cabinet size.

• Simplified Wiring: Eliminates the need for separate circuit breakers, overload relays, and disconnect switches, reducing wiring complexity and installation time.

• Cost-Effective: Often a more economical solution compared to purchasing and installing discrete components.

• Enhanced Safety: Provides reliable short-circuit and overload protection, safeguarding motors and preventing potential fire hazards. The disconnect function allows for safe isolation during maintenance.

• Easy Troubleshooting: Clear trip indication on the rotary handle helps quickly identify fault conditions.

• Wide Application Range: Available in various current ratings and breaking capacities to suit a broad spectrum of motor sizes and industrial applications.

• Global Compliance: Meets various international safety and performance standards.

• Integrated System: Seamlessly integrates with Allen-Bradley contactors and other control components, often allowing for direct mounting (e.g., with adapters) for compact starter solutions.

Precautions

• Correct Sizing: Always select the MPCB with a thermal adjustment range that encompasses the motor's full load current (FLC) and considering the motor's starting current. Undersizing leads to nuisance tripping, oversizing to inadequate protection.

• Installation: Follow the detailed instructions in the Allen-Bradley 190S series manual. Ensure proper mounting on a DIN rail, correct torque for terminal screws, and adequate clearances for ventilation and operation.

• Wiring: Adhere strictly to wiring diagrams. Ensure correct phase sequence and proper grounding. Use appropriate wire gauges for the rated current.

• Thermal Adjustment: Set the thermal overload dial precisely to the motor's nameplate FLC. Do not set it higher than the motor's FLC unless specifically advised by motor manufacturer for certain applications.

• Environmental Conditions: Operate the MPCB within its specified temperature and humidity ranges. Protect it from excessive dust, moisture, and corrosive atmospheres.

• Short-Circuit Coordination: Ensure proper coordination with upstream protective devices (e.g., main circuit breaker) to achieve selective tripping in case of a fault.

• Arc Flash Safety: Although a compact device, severe short-circuit faults can generate arc flash energy. Always follow relevant arc flash safety procedures (e.g., NFPA 70E) when working near energized equipment.

• Maintenance: Periodically inspect the MPCB for any signs of physical damage, overheating, or loose connections. Test the trip function if required by maintenance schedules.

Product Applications

Allen-Bradley 190S Series Motor Protection Circuit Breakers are extensively used in various industrial and commercial applications for the protection and control of 3-phase AC motors.

• Conveyors: Protecting motors in material handling systems.

• Pumps: Safeguarding motors in water treatment, HVAC, and process pumping applications.

• Fans & Blowers: Providing overload and short-circuit protection for ventilation systems.

• Compressors: Protecting compressor motors in refrigeration and air compression systems.

• Machine Tools: Used in various machinery for motor control and protection.

• Packaging Machinery: Ensuring reliable operation of motors in packaging lines.

• General Machine Control: Any application where a compact, integrated solution for motor protection and disconnection is required.

• Small to Medium Motor Starters: Ideal for building compact direct-on-line (DOL) or reversing starters.

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