Motor Protection Circuit Breakers (MPCB)
Compare published VIOX motor protection circuit breaker series for manual motor control, overload protection and short-circuit protection within coordinated motor starters.
Защита двигателяПерегрузка и короткое замыкание
Adjustable currentMatch the motor nameplate
Starter coordinationBreaker, contactor and accessories
Three-phase useVerify by model and circuit
What is an MPCB?
A motor protection circuit breaker is designed for switching and protection of motor circuits. Depending on the model, it combines adjustable overload response with short-circuit protection and manual control in a compact device.
Selection requires the motor rated current, starting characteristics, system voltage, prospective fault current and coordination with the contactor and accessories. Published breaking capacity and protection settings must be confirmed for the exact series.
MPCB Series Overview
Compare published VIOX models using facts already available in product data.
How to choose an MPCB
Match the adjustment range to the motor, then verify fault interruption and starter coordination.
Motor rated current
Choose an adjustment range that includes the motor nameplate current.
Характеристики короткого замыкания
Verify breaking capacity against the prospective fault current and system voltage.
Starting characteristics
Confirm the device is suitable for motor inrush and starting duration.
Contactor and accessories
Coordinate the MPCB with the contactor, auxiliary contacts and enclosure arrangement.
Build a coordinated motor starter
The MPCB protects and manually controls the motor circuit; the contactor and control system provide remote operation where required.
MPCB Applications
Typical environments where the exact product characteristics must be verified.
MPCB Selection Questions
Quick answers for preliminary product-family comparison before detailed circuit verification.
What does an MPCB protect against?
An MPCB is selected for motor-circuit overload and short-circuit protection within its published characteristics. Available auxiliary functions vary by series.
How is the MPCB current range selected?
Choose an adjustment range that includes the motor nameplate current, then set and commission the device according to the motor and product instructions.
How is an MPCB different from an MCB?
An MPCB is designed around motor starting and overload characteristics, while an MCB is generally used for branch-circuit overcurrent protection. Exact functions depend on the products compared.
Is a contactor still needed with an MPCB?
A contactor is used when remote or frequent electrical switching is required. The MPCB and contactor must be coordinated as a starter combination.
Which fault-current value should be checked?
Verify the published short-circuit breaking performance at the system voltage against the prospective fault current and coordination method.
Need the Right MPCB?
Let’s Match the Motor and Starter.
Send the motor nameplate data, system voltage, prospective fault current, starter arrangement, quantity and target market. VIOX will help identify the relevant published series.
Request MPCB Support